Zoom lens and imaging device

Abstract

The zoom lens includes, in order from the object side, a first lens group having a negative refractive power and a subsequent group. The subsequent group includes at least three lens groups. One of the at least three lens groups in the subsequent group has positive refractive power. When changing magnification, the interval between the first lens group and the subsequent group changes, and all the intervals between adjacent lens groups in the subsequent group change. The zoom lens satisfies a preset conditional expression.

Description

Technical Field

[0001] The technology of the present invention relates to a zoom lens and an imaging device. Background Art

[0002] Conventionally, as a zoom lens that can be used in an imaging device such as a digital camera, a zoom lens described in Japanese Patent Application Laid-Open No. 2021-124673 is known. Summary of the invention

[0003] There is a demand for a zoom lens that is compact and has good optical performance. These requirements are increasing year by year.

[0004] An object of the present invention is to provide a zoom lens which is compact and has excellent optical performance, and an imaging device including the zoom lens.

[0005] Means for solving technical problems

[0006] A zoom lens according to one aspect of the present invention includes, in order from the object side to the image side, a first lens group having negative power and subsequent groups, the subsequent groups including at least three lens groups, one of the at least three lens groups being a P lens group having positive power, and when changing the magnification, the interval between the first lens group and the subsequent groups changes, and all intervals between adjacent lens groups in the subsequent groups change, and when the focal length of the entire system in a state where the wide-angle end is focused on an object at infinity is set to fw, the focal length of the entire system in a state where the telephoto end is focused on an object at infinity is set to ft, the back focal length of the entire system at an air-converted distance in a state where the wide-angle end is focused on an object at infinity is set to Bfw, and the maximum half angle of view in a state where the wide-angle end is focused on an object at infinity is set to ωw, the zoom lens satisfies the following conditional expressions (1) and (2):

[0007] 1.5 <ft / fw<6 (1)

[0008] 0.4 <Bfw / (fw×tanωw)<2 (2)。

[0009] The P lens group is preferably a lens group in the subsequent group whose movement amount toward the object side is the largest when zooming from the wide-angle end to the telephoto end.

[0010] When the movement amount of the P lens group when changing magnification from the wide-angle end to the telephoto end is set to ΔP, and the sign of the movement amount when changing magnification is set to negative when moving toward the object side and to positive when moving toward the image side, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expression (3):

[0011] 0.9<(-ΔP) / fw<6 (3).

[0012] It is preferable that an N lens group having negative refractive power is included on the image side of the P lens group.

[0013] The zoom lens may be configured to include a final lens group located most toward the image side in the zoom lens, on the image side relative to the N lens groups.

[0014] At least a part of the N lens group is preferably a focusing group that moves along the optical axis during focusing.

[0015] When the focal length of the N lens group is set to fN, the zoom lens of the above embodiment preferably satisfies the following conditional expression (4):

[0016] 0.5<(-fN) / fw<7 (4).

[0017] When the open F value in a state where the zoom lens is focused on an object at infinity at the telephoto end is Fnot, the zoom lens of the above aspect preferably satisfies the following conditional expression (5):

[0018] 1.2 <Fnot<5.8 (5)。

[0019] When the open F value in the state of focusing on an object at infinity at the telephoto end is Fnot and the open F value in the state of focusing on an object at infinity at the wide-angle end is Fnow, the zoom lens of the above-described embodiment preferably satisfies the following conditional expression (6):

[0020] 0.95 <Fnot / Fnow<1.8 (6)。

[0021] When the focal length of the P lens group is set to fP, the zoom lens of the above embodiment preferably satisfies the following conditional expression (7):

[0022] 0.5 <fP / fw<6 (7)。

[0023] The zoom lens of the above embodiment preferably satisfies the following conditional expression (8):

[0024] 35<ωw<54 (8).

[0025] The final lens group preferably has positive optical power.

[0026] The structure may include an M lens group between the P lens group and the N lens group.

[0027] In the zoom lens of the above-described method, the P lens group has the largest movement amount toward the object side when zooming from the wide-angle end to the telephoto end among the lens groups in the subsequent group, includes an N lens group having negative optical power on the image side of the P lens group, includes an M lens group between the P lens group and the N lens group, and when the movement amount of the P lens group when zooming from the wide-angle end to the telephoto end is set to ΔP, and the sign of the movement amount when zooming is set to negative when moving toward the object side and to positive when moving toward the image side, the zoom lens preferably satisfies the following conditional formula (3):

[0028] 0.9<(-ΔP) / fw<6 (3).

[0029] The M lens group preferably has positive refractive power.

[0030] When the focal length of the M lens group is set to fM, the zoom lens of the above embodiment preferably satisfies the following conditional expression (9):

[0031] 0.01 <fw / fM<0.35 (9)。

[0032] When the refractive index of the positive lens closest to the image side among the positive lenses in the M lens group with respect to the d-line is NMp and the Abbe number of the positive lens closest to the image side among the positive lenses in the M lens group with respect to the d-line is vMp, the zoom lens of the above-described embodiment preferably satisfies the following conditional expressions (10) and (11):

[0033] 1.73<NMp<2.5 (10)

[0034] 10<v Mp<50 (11).

[0035] The zoom lens of the above aspect preferably includes an aperture stop on the most object side of the M lens group.

[0036] The first lens unit preferably includes a negative meniscus lens having a concave surface facing the image side, on the most object side.

[0037] When the focal length of the first lens group is set to f1, the zoom lens of the above aspect preferably satisfies the following conditional expression (12):

[0038] 1<(-f1) / fw<2.5 (12).

[0039] When the distance on the optical axis from the lens surface of the first lens group closest to the object side to the lens surface of the first lens group closest to the image side is denoted as DG1, the zoom lens of the above aspect preferably satisfies the following conditional expression (13):

[0040] 0.71 <DG1 / (fw×tanωw)<2.5 (13)。

[0041] When the distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is denoted as DGP, the zoom lens of the above-described embodiment preferably satisfies the following conditional expression (14):

[0042] 0.35 <DGP / (fw×tanωw)<2.5 (14)。

[0043] When the distance on the optical axis from the lens surface closest to the object to the paraxial entrance pupil position in the state of focusing on an infinitely distant object at the wide-angle end is denoted by Denw, the zoom lens of the above embodiment preferably satisfies the following conditional expression (15):

[0044] 1<Denw / fw<2.2 (15).

[0045] When the average value of the specific gravity of all lenses in the first lens group is defined as Glave, the zoom lens of the above aspect preferably satisfies the following conditional expression (16):

[0046] 1<Glave<5 (16).

[0047] When the average value of the specific gravity of all lenses in the P lens group is GPave, the zoom lens of the above embodiment preferably satisfies the following conditional expression (17):

[0048] 1 <GPave<5 (17)。

[0049] When the average value of the specific gravity of all lenses of the focus group is Gfave, the distance on the optical axis from the lens surface closest to the object side of the focus group to the lens surface closest to the image side of the focus group is DGfoc, and the focal length of the focus group is ffoc, the zoom lens of the above-mentioned method preferably satisfies the following conditional expression (18):

[0050] 0.03 <Gfave×DGfoc / |ffoc|<0.9 (18)。

[0051] When the focal length of the first lens group is f1 and the focal length of the P lens group is fP, the zoom lens of the above embodiment preferably satisfies the following conditional expression (19):

[0052] 0.3<(-f1) / fP<1.5 (19).

[0053] When the focal length of the first lens group is f1 and the focal length of the M lens group is fM, the zoom lens of the above embodiment preferably satisfies the following conditional expression (20):

[0054] 0<(-f1) / fM<0.7 (20).

[0055] When the focal length of the P lens group is set to fP and the focal length of the M lens group is set to fM, the zoom lens of the above embodiment preferably satisfies the following conditional expression (21):

[0056] 0 <fP / fM<2 (21)。

[0057] When the focal length of the focus group is set to ffoc, the zoom lens of the above-mentioned method preferably satisfies the following conditional expression (22):

[0058] 1.2<(-ffoc) / (fw×tanωw)<5.5 (22).

[0059] The first lens group includes at least one aspherical lens, and when the paraxial curvature radius of the object-side surface of the aspherical lens of the first lens group is set to Rclf, the paraxial curvature radius of the image-side surface of the aspherical lens of the first lens group is set to Rclr, the curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the first lens group is set to Rylf, and the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the first lens group is set to Rylr, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional formula (23):

[0060] 1.05<(1 / Rc1f-1 / Rc1r) / (1 / Ry1f-1 / Rylr)<8 (23).

[0061] The P lens group includes at least one aspherical lens, and when the paraxial curvature radius of the object-side surface of the aspherical lens of the P lens group is set to RcPf, the curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the P lens group is set to RyPf, the refractive index of the aspherical lens of the P lens group with respect to the d-line is set to NP, and the focal length of the P lens group is set to fP, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional formula (24):

[0062] 0.01<(1 / RcPf-1 / RyPf)×NP×fP<5 (24).

[0063] The N lens group includes at least one aspherical lens, and when the paraxial curvature radius of the object-side surface of the aspherical lens of the N lens group is set to RcNf, the paraxial curvature radius of the image-side surface of the aspherical lens of the N lens group is set to RcNr, the curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the N lens group is set to RyNf, and the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the N lens group is set to RyNr, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional formula (25):

[0064] 0.7<(1 / RcNf-1 / RcNr) / (1 / RyNf-1 / RyNr)<0.996 (25).

[0065] The final lens group includes at least one aspherical lens, and when the paraxial curvature radius of the object side surface of the aspherical lens of the final lens group is set to RcEf, the paraxial curvature radius of the image side surface of the aspherical lens of the final lens group is set to RcEr, the curvature radius at the position of the maximum effective diameter of the object side surface of the aspherical lens of the final lens group is set to RyEf, and the curvature radius at the position of the maximum effective diameter of the image side surface of the aspherical lens of the N lens group is set to RyEr, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional formula (26):

[0066] 1.01<(1 / RcEf-1 / RcEr) / (1 / RyEf-1 / RyEr)<2 (26).

[0067] The first lens group includes at least one negative lens, and when the Abbe number of the d-line reference of the negative lens of the first lens group is set to v ln and the partial dispersion ratio between the g-line and the F-line of the negative lens of the first lens group is set to θgFln, the zoom lens of the above embodiment preferably satisfies the following conditional expressions (27) and (28):

[0068] 55<v ln<110 (27)

[0069] 0.003<θgFln-(0.6438-0.001682×v ln)<0.05 (28).

[0070] The P lens group includes at least one negative lens, and when the Abbe number of the d-line reference of the negative lens of the P lens group is νPn and the partial dispersion ratio between the g-line and the F-line of the negative lens of the P lens group is θgFPn, the zoom lens of the above embodiment preferably satisfies the following conditional expressions (29) and (30):

[0071] 55<v Pn<110 (29)

[0072] 0.003<θgFPn-(0.6438-0.001682×v Pn)<0.05 (30).

[0073] The N lens group includes at least one negative lens, and when the Abbe number of the d-line reference of the negative lens of the N lens group is vNn, and the partial dispersion ratio between the g-line and the F-line of the negative lens of the N lens group is θgFNn, the zoom lens of the above embodiment preferably satisfies the following conditional expressions (31) and (32):

[0074] 55<vNn<110 (31)

[0075] 0.003<θgFNn-(0.6438-0.001682×vNn)<0.05 (32).

[0076] The M lens group includes at least one negative lens, and when the Abbe number of the d-line reference of the negative lens of the M lens group is vMn and the partial dispersion ratio between the g-line and the F-line of the negative lens of the M lens group is θgFMn, the zoom lens of the above embodiment preferably satisfies the following conditional expressions (33) and (34):

[0077] 55<vMn<110 (33)

[0078] 0.003<θgFMn-(0.6438-0.001682×vMn)<0.06 (34).

[0079] The final lens group includes at least one positive lens. When the Abbe number of the d-line reference of the positive lens of the final lens group is set to vEp and the partial dispersion ratio between the g-line and the F-line of the positive lens of the final lens group is set to θgFEp, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expressions (35) and (36):

[0080] 55<vEp<110 (35)

[0081] 0.003<θgFEp-(0.6438-0.001682×vEp)<0.05 (36).

[0082] The first lens group includes at least one positive lens. When the refractive index of the positive lens of the first lens group with respect to the d-line is N1p and the Abbe number of the positive lens of the first lens group with respect to the d-line is v1p, the zoom lens of the above-described embodiment preferably satisfies the following conditional expressions (37) and (38):

[0083] 1.8<N1p<2.3 (37)

[0084] 10<v1p<45 (38).

[0085] The final lens group may be configured to be fixed relative to the image plane during zooming.

[0086] The first lens unit may include a biconcave lens disposed on the image side of the negative meniscus lens and a positive lens disposed on the image side of the biconcave lens.

[0087] The first lens group at the telephoto end may be located closer to the image side than the first lens group at the wide angle end. Alternatively, the first lens group at the telephoto end may be located closer to the object side than the first lens group at the wide angle end.

[0088] The subsequent group includes an aperture stop, and at least one negative lens with a concave surface facing the object side is arranged on the image side of the aperture stop, and the distance on the optical axis between the aperture stop and the negative lens with a concave surface facing the object side in a state where the aperture stop is focused on an infinite object at the wide-angle end is set to DSInw, and the sum of the distance on the optical axis from the lens surface on the most object side of the first lens group to the lens surface on the most image side of the subsequent group in a state where the aperture stop is focused on an infinite object at the wide-angle end and the back focal length of the entire system in the air conversion distance is set to TLw, the zoom lens of the above-mentioned method preferably satisfies the following conditional formula (39):

[0089] 0.001 <DSInw / TLw<0.12 (39)。

[0090] The subsequent group includes an aperture stop, and at least one negative lens with a concave surface facing the image side is arranged on the object side of the aperture stop, and the distance on the optical axis between the aperture stop and the negative lens with a concave surface facing the image side in a state where the aperture stop is focused on an infinite object at the wide-angle end is set to DSOnw, and the sum of the distance on the optical axis from the lens surface on the most object side of the first lens group to the lens surface on the most image side of the subsequent group in a state where the aperture stop is focused on an infinite object at the wide-angle end and the back focal length of the entire system in the air conversion distance is set to TLw, the zoom lens of the above-mentioned method preferably satisfies the following conditional formula (40):

[0091] 0.001 <DSOnw / TLw<0.18 (40)。

[0092] The subsequent group includes an aperture stop, and at least one cemented lens is arranged on the image side of the aperture stop, and the distance on the optical axis between the aperture stop and the cemented surface of the cemented lens on the image side of the aperture stop in a state where the aperture stop is focused on an infinite object at the wide angle end is set to DSIcew, and the sum of the distance on the optical axis from the lens surface on the most object side of the first lens group to the lens surface on the most image side of the subsequent group in a state where the aperture stop is focused on an infinite object at the wide angle end and the back focal length of the entire system in the air conversion distance is set to TLw, the zoom lens of the above-mentioned method preferably satisfies the following conditional formula (41):

[0093] 0.001 <DSIcew / TLw<0.12 (41)。

[0094] The subsequent group includes an aperture stop, and at least one cemented lens is arranged on the object side of the aperture stop, and the distance on the optical axis between the aperture stop and the cemented surface of the cemented lens on the object side of the aperture stop when the aperture stop is focused on the infinite object at the wide angle end is set to DSOcew, and the sum of the distance on the optical axis from the lens surface on the most object side of the first lens group to the lens surface on the most image side of the subsequent group when the aperture stop is focused on the infinite object at the wide angle end and the back focal length of the entire system in the air conversion distance is set to TLw, the zoom lens of the above-mentioned method preferably satisfies the following conditional formula (42):

[0095] 0.001 <DSOcew / TLw<0.18 (42)。

[0096] When the movement amount of the N lens group when changing magnification from the wide-angle end to the telephoto end is set to ΔN, the movement amount of the P lens group when changing magnification from the wide-angle end to the telephoto end is set to ΔP, and the sign of the movement amount when changing magnification is set to negative when moving toward the object side and to positive when moving toward the image side, the zoom lens of the above-mentioned method preferably satisfies the following conditional expression (43):

[0097] 0.1<ΔN / ΔP<0.75 (43).

[0098] When the sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group in a state where the zoom lens is focused on an infinitely distant object at the wide-angle end and the back focus of the entire system at the air conversion distance is set to Dexw, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expression (44):

[0099] 1.5 <Dexw / (fw×tanωw)<5 (44)。

[0100] When the open F value in the state of focusing on an infinitely distant object at the telephoto end is set as Fnot, and the distance on the optical axis from the lens surface closest to the object side of the P lens group to the lens surface closest to the image side of the P lens group is set as DGP, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expression (45):

[0101] 0.4<Fnot×DGP / ft<4 (45).

[0102] When the open F value in the state of focusing on an infinitely distant object at the telephoto end is set to Fnot, the distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is set to DGP, and the distance on the optical axis from the lens surface of the M lens group closest to the object side to the lens surface of the M lens group closest to the image side is set to DGM, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expression (46):

[0103] 0.4 <Fnot×(DGP+DGM) / ft<4 (46)。

[0104] The configuration may include one lens group between the first lens group and the P lens group.

[0105] When the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state of focusing on an infinitely distant object at the telephoto end and the back focal length of the entire system at the air conversion distance is set to TLt, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expression (47):

[0106] 1.2 <TLt / ft<5 (47)。

[0107] When the focal length of the final lens group is set to fE, the zoom lens of the above embodiment preferably satisfies the following conditional expression (48):

[0108] 0.1 <fw / fE<0.7 (48)。

[0109] When the lateral magnification of the focus group in a state where the focus is focused on an infinitely distant object at the wide angle end is set to βfw, and the combined lateral magnification of all lenses on the image side of the focus group in a state where the focus is focused on an infinitely distant object at the wide angle end is set to βfRw, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expression (49):

[0110] 0.3<|(1-β fw 2 )×β fRw 2 |<3 (49).

[0111] When the lateral magnification of the focus group in a state where the focus is focused on an infinitely distant object at the telephoto end is set to β ft, and the combined lateral magnification of all lenses on the image side of the focus group in a state where the focus is focused on an infinitely distant object at the telephoto end is set to β fRt, the zoom lens of the above-mentioned embodiment preferably satisfies the following conditional expression (50):

[0112] 0.5<|(1-βft 2 )×βfRt 2 |<4 (50).

[0113] The focal length of the focusing group is ffoc, the composite focal length of all lenses on the image side of the focusing group when the wide-angle end is focused on an infinitely distant object is ffRw, the sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface on the image side of the subsequent group when the wide-angle end is focused on an infinitely distant object and the back focal length of the entire system at the air conversion distance is Dexw, and

[0114] γw=(1-β fw 2 )×β fRw 2 ,

[0115] When BRw={β fw / (ffoc×γw)-1 / (β fRw×ffRw)-(1 / Dexw)}, the zoom lens of the above embodiment preferably satisfies the following conditional formula (51):

[0116] 0<(-BRw)×(fw×tanωw)<0.7 (51).

[0117] The focal length of the focusing group is set as ffoc, the composite focal length of all lenses on the image side of the focusing group when the telephoto end is focused on an infinite object is set as ffRt, the sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface on the image side of the subsequent group when the telephoto end is focused on an infinite object and the back focal length of the entire system at the air conversion distance is set as Dext, the maximum half angle of view when the telephoto end is focused on an infinite object is set as ωt, and

[0118] γt=(1-βft 2 )×βfRt 2 ,

[0119] When BRt={βft / (ffoc×γt)-1 / (βfRt×ffRt)-(1 / Dext)}, the zoom lens of the above embodiment preferably satisfies the following conditional expression (52):

[0120] 0<(-BRt)×(ft×tanωt)<0.5 (52).

[0121] The zoom lens of the above aspect preferably includes an aperture stop, and includes at least three lenses between the first lens group and the aperture stop.

[0122] The zoom lens of the above aspect preferably includes an aperture stop, and includes at least three positive lenses between the first lens group and the aperture stop.

[0123] The zoom lens of the above aspect preferably includes an aperture stop, and includes at least three lenses between the aperture stop and the N lens groups.

[0124] The zoom lens of the above aspect preferably includes an aperture stop, and at least two positive lenses between the aperture stop and the N lens group.

[0125] The number of lenses included in the focusing group is preferably 2 or less.

[0126] The number of lenses included in the final lens group is preferably 2 or less.

[0127] The lens surface most on the image side of the first lens unit is preferably a concave surface.

[0128] The movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end may be five, four, or three different movement trajectories.

[0129] At least one of the lens closest to the object side and the second lens from the object side is a negative lens, and when the refractive index of at least one of the negative lens closest to the object side and the second lens from the object side with respect to the d-line is set to Nobn, the zoom lens of the above embodiment preferably satisfies the following conditional expression (53):

[0130] 1.7<Nobn<2.2 (53).

[0131] The lens closest to the object side is preferably a negative lens and satisfies the above conditional expression (53).

[0132] An imaging device according to another aspect of the present invention includes the zoom lens according to the above aspect of the present invention.

[0133] In addition, the terms "including..." and "composed of..." in this specification mean that in addition to the listed constituent elements, it may also include lenses that essentially have no optical focal length, as well as optical elements other than lenses such as diaphragms, filters and cover glasses, as well as mechanical parts such as lens flanges, lens barrels, imaging elements and hand-shake correction mechanisms.

[0134] The "group ~ having positive focal power" and "group ~ having positive focal power" in this specification means that the group as a whole has positive focal power. Similarly, the "group ~ having negative focal power" and "group ~ having negative focal power" mean that the group as a whole has negative focal power. The "first lens group", "lens group", "P lens group", "N lens group", "final lens group", "focusing group" and "M lens group" in this specification are not limited to structures including multiple lenses, and can also be set to a structure including only one lens.

[0135] A composite aspheric lens (a lens in which a spherical lens and a film having an aspheric shape formed on the spherical lens are integrated to function as a single aspheric lens as a whole) is not considered a cemented lens, but is used as a single lens. Unless otherwise specified, the sign of the optical power and the surface shape related to the lens including the aspheric surface use the sign of the optical power and the surface shape of the paraxial region. Regarding the sign of the paraxial curvature radius, the sign of the convex surface facing the object side is set to positive, and the sign of the convex surface facing the image side is set to negative.

[0136] In this specification, "entire system" refers to a zoom lens. The "focal length" used in the conditional expressions is the paraxial focal length. Unless otherwise specified, the "distance on the optical axis" used in the conditional expressions is the geometric distance. Unless otherwise specified, the values ​​used in the conditional expressions are the values ​​when the d line is used as the reference in the state of focusing on an object at infinity.

[0137] The "d-line", "C-line", "F-line" and "g-line" described in this specification are bright lines. The wavelength of the d-line is considered to be 587.56nm (nanometers), the wavelength of the C-line is considered to be 656.27nm (nanometers), the wavelength of the F-line is considered to be 486.13nm (nanometers), and the wavelength of the g-line is considered to be 435.84nm (nanometers).

[0138] Effects of the Invention

[0139] According to the present invention, it is possible to provide a zoom lens that is compact and has excellent optical performance, and an imaging device including the zoom lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0140] Figure 1 1 is a diagram showing a structure and a movement trajectory of a zoom lens according to an embodiment corresponding to the zoom lens of Example 1.

[0141] Figure 2 This is a diagram for explaining symbols of each conditional expression.

[0142] Figure 3 It is a diagram for explaining the effective diameter and the position of the maximum effective diameter.

[0143] Figure 4 1 and 2 are diagrams showing various aberrations of the zoom lens according to Example 1.

[0144] Figure 5 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 2.

[0145] Figure 6 These are diagrams showing various aberrations of the zoom lens according to Example 2.

[0146] Figure 7 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 3.

[0147] Figure 8 1 and 10 are diagrams showing various aberrations of the zoom lens according to Example 3.

[0148] Fig. 9 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 4.

[0149] Fig.10 1 and 1 are diagrams showing various aberrations of the zoom lens according to Example 4.

[0150] Fig.11 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 5.

[0151] Fig.12 These are diagrams showing various aberrations of the zoom lens of Example 5.

[0152] Fig.13 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 6.

[0153] Fig.14 These are various aberration diagrams of the zoom lens of Example 6.

[0154] Fig.15 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 7.

[0155] Fig.16 These are diagrams showing various aberrations of the zoom lens of Example 7.

[0156] Fig.17 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 8.

[0157] Fig.18 These are various aberration diagrams of the zoom lens of Example 8.

[0158] Fig.19 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 9.

[0159] Fig. 20 These are various aberration diagrams of the zoom lens of Example 9.

[0160] Fig.21 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 10.

[0161] Fig. 22 These are diagrams showing various aberrations of the zoom lens of Example 10.

[0162] Fig.23 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 11.

[0163] Fig.24 These are various aberration diagrams of the zoom lens of Example 11.

[0164] Fig.25 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 12.

[0165] Fig.26 These are various aberration diagrams of the zoom lens of Example 12.

[0166] Fig. 27 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 13.

[0167] Fig.28 These are various aberration diagrams of the zoom lens of Example 13.

[0168] Fig.29 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 14.

[0169] Fig.30 These are various aberration diagrams of the zoom lens of Example 14.

[0170] Fig.31 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 15.

[0171] Fig.32 These are various aberration diagrams of the zoom lens of Example 15.

[0172] Fig.33 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 16.

[0173] Fig.34 These are various aberration diagrams of the zoom lens of Example 16.

[0174] Fig.35 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 17.

[0175] Fig.36 These are various aberration diagrams of the zoom lens of Example 17.

[0176] Fig.37 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 18.

[0177] Fig.38 These are various aberration diagrams of the zoom lens of Example 18.

[0178] Fig.39 It is a diagram showing the structure and movement trajectory of the zoom lens of Example 19.

[0179] Fig.40 These are various aberration diagrams of the zoom lens of Example 19.

[0180] Fig.41 This is a perspective view of the front side of the imaging device according to one embodiment.

[0181] Fig.42 This is a perspective view of the back side of the imaging device according to one embodiment. DETAILED DESCRIPTION

[0182] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0183] exist Figure 1A cross-sectional view of the structure and movement trajectory of a zoom lens according to an embodiment of the present invention is shown in FIG. Figure 1 , the upper section labeled “Wide” shows the wide-angle end state, and the lower section labeled “Tele” shows the telephoto end state. Figure 1 The example shown corresponds to the zoom lens of Example 1 described later. Figure 1 The figure shows the state of focusing on an object at infinity, with the left side being the object side and the right side being the image side. Figure 1 , an axial light beam wa at the wide-angle end and a light beam wb at a maximum half viewing angle ωw, and an axial light beam ta at the telephoto end and a light beam tb at a maximum half viewing angle ωt are also shown.

[0184] exist Figure 1 , an example is shown in which a parallel flat plate-shaped optical component PP is arranged between the zoom lens and the image plane Sim, assuming that the zoom lens is applied to the image pickup device. The optical component PP is a component assumed to be various filters and / or cover glass, etc. The various filters are low-pass filters, infrared cut-off filters, and / or filters that cut off specific wavelength regions, etc. The optical component PP is a component that does not have optical power. It is also possible to configure the image pickup device by omitting the optical component PP.

[0185] The zoom lens of the present invention includes a first lens group G1 and a subsequent lens group GR having negative refractive power in order from the object side to the image side along the optical axis Z. By setting the refractive power of the first lens group G1 closest to the object side to be negative, it is easy to reduce the diameter of the lens closest to the object side, which is advantageous for miniaturization.

[0186] When changing the magnification, the interval between the first lens group G1 and the subsequent group GR changes, and all intervals between adjacent lens groups in the subsequent group GR change. In addition, the "first lens group G1" and the "~ lens group" included in the subsequent group GR in this specification are components of the zoom lens, and are parts that include at least one lens separated by an air gap that changes when changing the magnification as a boundary. When changing the magnification, each lens group is moved or fixed as a unit, and the intervals between the lenses in each lens group do not change. That is, in this specification, when changing the magnification, the interval with the adjacent group changes, and the overall interval between the adjacent lenses in itself does not change is set as one lens group.

[0187] As an example, Figure 1 The zoom lens includes, from the object side to the image side, a first lens group G1 having negative power, a second lens group G2 having positive power, a third lens group G3 having positive power, a fourth lens group G4 having negative power, and a fifth lens group G5 having positive power. Figure 1In the example of , the subsequent group GR includes a second lens group G2 , a third lens group G3 , a fourth lens group G4 and a fifth lens group G5 .

[0188] As an example, Figure 1 Each lens group is composed of the lenses described below. The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes four lenses, L21 to L24, in order from the object side to the image side. The third lens group G3 includes three lenses, aperture stop St and lenses L31 to L33, in order from the object side to the image side. The fourth lens group G4 includes two lenses, L41 to L42, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51. Figure 1 The aperture stop St indicates the position in the optical axis direction, not the shape and size.

[0189] exist Figure 1 In the example of , when changing magnification, the first lens group G1, the second lens group G2, the third lens group G3 and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. Figure 1 In FIG. 1 , regarding the moving lens groups, the arrows between the upper and lower sections indicate the approximate movement loci of each lens group when zooming from the wide-angle end to the telephoto end.

[0190] The zoom lens of the present invention preferably includes an aperture stop St, and includes at least three lenses between the first lens group G1 and the aperture stop St. In this case, it is advantageous to correct spherical aberration while reducing the F value.

[0191] The zoom lens of the present invention preferably includes an aperture stop St, and includes at least three positive lenses between the first lens group G1 and the aperture stop St. In this case, it is advantageous to correct axial chromatic aberration while reducing the F value.

[0192] The first lens group G1 preferably includes a negative meniscus lens with a concave surface facing the image side on the side closest to the object. In this case, it is advantageous to correct distortion. In addition, in this specification, a "negative meniscus lens" is a meniscus lens with negative optical power.

[0193] In the case where the first lens group G1 includes a negative meniscus lens with its concave surface facing the image side at the side closest to the object, the first lens group G1 preferably includes a biconcave lens disposed at a position closer to the image side than the negative meniscus lens and a positive lens disposed at a position closer to the image side than the biconcave lens. In this case, it is advantageous to suppress chromatic aberration of magnification and astigmatism.

[0194] The lens surface closest to the image side of the first lens group G1 is preferably a concave surface, which is advantageous in suppressing the change of astigmatism during zooming.

[0195] like Figure 1 For example, the first lens group G1 at the telephoto end can be configured to be located closer to the image side than the first lens group G1 at the wide-angle end. In this case, it is advantageous to shorten the total length of the lens system. Figure 1 Unlike the example of , when the first lens group G1 at the telephoto end is configured to be located closer to the object side than the first lens group G1 at the wide-angle end, it is advantageous for achieving a high zoom ratio.

[0196] It is preferable that at least one of the lens closest to the object side of the zoom lens and the second lens from the object side of the zoom lens is a negative lens. In this case, it is advantageous for widening the angle of view.

[0197] The rear lens group GR is composed of at least three lens groups. In this way, the three lens groups can respectively play a major role in zooming, an imaging role, and a role in correcting the image plane position during zooming.

[0198] One of at least three lens groups of the subsequent group GR is a P lens group having positive refractive power. The P lens group can play a major role in variable magnification.

[0199] The P lens group can be configured as the lens group in the subsequent group GR, which has the largest amount of movement toward the object side when zooming from the wide-angle end to the telephoto end. In this case, the P lens group becomes a lens group that is preferred as a lens group that plays a major zooming role. For example, in Figure 1 In the example, among the lens groups in the subsequent group GR, the lens group that moves the largest amount toward the object side when zooming from the wide-angle end to the telephoto end is the second lens group G2.

[0200] The zoom lens of the present invention preferably includes an N lens group having negative refractive power on the image side relative to the P lens group. In this case, the N lens group can play a role in correcting the image plane position when the zoom is changed. Figure 1 In the example, when the second lens group G2 is associated with the P lens group, the fourth lens group G4 corresponds to the N lens group.

[0201] At least a part of the N lens group is preferably a focus group that moves along the optical axis Z during focusing. The N lens group is located at a position where both the diameter of the on-axis light beam at the telephoto end and the height of the off-axis light beam at the wide-angle end from the optical axis Z become small. By setting at least a part of the N lens group as a focus group, the lens diameter of the focus group can be reduced, and the group can be miniaturized, which is advantageous when performing automatic focusing.

[0202] In this specification, the group that moves along the optical axis Z during focusing is referred to as a focus group. Focusing is performed by moving the focus group. Figure 1 In the example, the focusing group includes the fourth lens group G4. Figure 1 The brackets and rightward arrow under the 4th lens group G4 indicate that when focusing from an object at infinity to the nearest object, the 4th lens group G4 is a focusing group that moves toward the image side. In addition, the 4th lens group G4 functions as a focusing group in the entire zoom range, but Figure 1 In order to avoid complicating the figure, brackets and arrows indicating focus groups are only marked in the figure in the lower section.

[0203] The number of lenses included in the focusing group is preferably 2 or less. In the case of such a configuration, it is advantageous to reduce the weight of the focusing group.

[0204] The zoom lens of the present invention preferably includes an aperture stop St and at least three lenses between the aperture stop St and the N lens group. In this case, it is advantageous to suppress the variation of spherical aberration when zooming.

[0205] The zoom lens of the present invention preferably includes an aperture stop St and at least two positive lenses between the aperture stop St and the lens group N. In this case, it is advantageous to suppress the variation of axial chromatic aberration when zooming.

[0206] The zoom lens of the present invention preferably includes a final lens group located closest to the image side in the zoom lens, closer to the image side than the N lens groups. In this way, by arranging the lens group at a position close to the imaging position, it is advantageous to correct aberrations related to off-axis light beams, such as distortion and chromatic aberration of magnification. Figure 1 In the example, the fifth lens group G5 corresponds to the final lens group.

[0207] The final lens group preferably has positive refractive power. In this case, the incident angle of light at the wide-angle end to the image plane Sim can be reduced, and it is beneficial to suppress distortion aberration and chromatic aberration of magnification at the wide-angle end.

[0208] The number of lenses included in the final lens group is preferably less than 2. In this case, it is beneficial to shorten the total length of the lens system.

[0209] The final lens group may be configured to be fixed relative to the image plane Sim during zooming. In this case, it is advantageous to suppress the change of the image plane curvature during zooming and it can also contribute to the simplification of the device.

[0210] The zoom lens of the present invention may be configured to include an M lens group between a P lens group and an N lens group. In this case, it is advantageous to suppress the variation of spherical aberration when zooming. Figure 1In the example, when the second lens group G2 is associated with the P lens group and the fourth lens group G4 is associated with the N lens group, the third lens group G3 corresponds to the M lens group.

[0211] The M lens group can be configured to have positive focal power. In this case, since the positive focal power can be shared with the P lens group, the error sensitivity of the P lens group on the telephoto side, which is prone to become a problem in large-diameter lenses, can be suppressed. This can help realize a zoom lens with good optical performance.

[0212] The zoom lens of the present invention may be configured to include an aperture stop St on the object side of the M lens group. By arranging the aperture stop St on the image side of the P lens group that performs the zooming function, the opening diameter of the aperture stop St itself can be reduced, and the change accompanying the zooming can also be reduced.

[0213] Next, the preferred structure and the achievable structure related to the conditional formula of the zoom lens of the present invention are described. In the following description related to the conditional formula, in order to avoid redundant description, the same symbols are used for the parts with the same definition, and some repeated descriptions of the symbols are omitted. In addition, in order to avoid redundant description, the "zoom lens of the present invention" is also referred to as "zoom lens" in short.

[0214] When the focal length of the entire system in the state of focusing on an infinitely distant object at the wide-angle end is set to fw, and the focal length of the entire system in the state of focusing on an infinitely distant object at the telephoto end is set to ft, the zoom lens preferably satisfies the following conditional formula (1). By making the corresponding value of conditional formula (1) not less than the lower limit, a high zoom ratio can be achieved. By making the corresponding value of conditional formula (1) not exceed the upper limit, the movement amount of each lens group during zooming can be controlled, which is conducive to miniaturization. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (1-1), further more preferably satisfies the following conditional formula (1-2), and further preferably satisfies the following conditional formula (1-3).

[0215] 1.5 <ft / fw<6 (1)

[0216] 1.9 <ft / fw<5 (1-1)

[0217] 2.1<ft / fw<4.5 (1-2)

[0218] 2.8 <ft / fw<4.2 (1-3)

[0219] The zoom lens preferably satisfies the following conditional expression (2). Here, the back focal length of the entire system at the air conversion distance in the state where the wide-angle end is focused on an infinitely distant object is set to Bfw. The maximum half viewing angle in the state where the wide-angle end is focused on an infinitely distant object is set to ωw. tan is a tangent. By making the corresponding value of conditional expression (2) not less than the lower limit, it is beneficial to ensure the amount of peripheral light. In addition, since the lens group closest to the image side can be kept away from the image plane Sim, it is beneficial to suppress ghosting or flare caused by reflection from the image plane Sim. By making the corresponding value of conditional expression (2) not exceed the upper limit, it is possible to ensure the space for the lens group that moves when changing the magnification while maintaining the total length of the lens system, which is beneficial to achieving a high magnification ratio while achieving miniaturization. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (2-1), and further preferably satisfies the following conditional expression (2-2).

[0220] 0.4<Bfw / (fw×tanωw)<2 (2)

[0221] 0.65 <Bfw / (fw×tanωw)<1.7 (2-1)

[0222] 0.84 <Bfw / (fw×tanωw)<1.48 (2-2)

[0223] When the movement amount of the P lens group when changing magnification from the wide-angle end to the telephoto end is ΔP, the zoom lens preferably satisfies the following conditional expression (3). Here, the sign of the movement amount when changing magnification is set to negative when moving toward the object side and to positive when moving toward the image side. As an example, Figure 2 The movement amount ΔP of the second lens group G2 when corresponding to the P lens group is shown in . By making the corresponding value of conditional formula (3) not less than the lower limit, the movement amount of the P lens group will not become too small, so it is easy to ensure the desired zoom ratio. Assuming that if you want to ensure the desired zoom ratio when the movement amount of the P lens group is small, you have to increase the optical focal length of the P lens group. As a result, it is difficult to correct the spherical aberration and axial chromatic aberration on the telephoto side. By making the corresponding value of conditional formula (3) not less than the lower limit, this failure can be avoided. By making the corresponding value of conditional formula (3) not exceed the upper limit, the movement amount of the P lens group will not become too large, so it is possible to avoid the enlargement of the diameter of the first lens group G1 that accompanies the enlargement of the total length of the lens system, thereby facilitating miniaturization. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (3-1), and further preferably satisfies the following conditional formula (3-2).

[0224] 0.9<(-ΔP) / fw<6 (3)

[0225] 1.2<(-ΔP) / fw<5 (3-1)

[0226] 1.75<(-ΔP) / fw<3.5 (3-2)

[0227] When the focal length of the N lens group is set to fN, the zoom lens preferably satisfies the following conditional formula (4). By making the corresponding value of conditional formula (4) not less than the lower limit, the optical power of the N lens group will not become too strong, so that the changes in various aberrations accompanying the magnification change can be suppressed, especially the changes in the field curvature can be suppressed. This is beneficial for taking into account both large aperture and high magnification ratio. By making the corresponding value of conditional formula (4) not exceed the upper limit, the optical power of the N lens group will not become too weak, so it is easy to avoid the increase in the total length of the lens system caused by the increase in the movement of the N lens group when changing the magnification. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (4-1), and further preferably satisfies the following conditional formula (4-2).

[0228] 0.5<(-fN) / fw<7 (4)

[0229] 1.2<(-fN) / fw<5.8 (4-1)

[0230] 1.63<(-fN) / fw<4.88 (4-2)

[0231] When the open F value in the state of focusing on an infinitely distant object at the telephoto end is set to Fnot, the zoom lens preferably satisfies the following conditional formula (5). By making the corresponding value of conditional formula (5) not less than the lower limit, the on-axis light beam at the telephoto end can be thinned, which is beneficial to the miniaturization and lightness of the lens. By making the corresponding value of conditional formula (5) not exceed the upper limit, a brighter optical image can be obtained at the telephoto end. The effects of the various structures of the present invention are mostly suitable for zoom lenses with small F values. Therefore, by making the corresponding value of conditional formula (5) not exceed the upper limit, a more preferred zoom lens can be provided. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (5-1), and further preferably satisfies the following conditional formula (5-2).

[0232] 1.2 <Fnot<5.8 (5)

[0233] 2 <Fnot<4.2 (5-1)

[0234] 2.73 <Fnot<3.7 (5-2)

[0235] When the open F value in the state of focusing on an infinitely distant object at the wide-angle end is set to Fnow, the zoom lens preferably satisfies the following conditional formula (6). By making the corresponding value of conditional formula (6) not less than the lower limit, the on-axis light beam at the telephoto end can be made thinner, which is beneficial to the miniaturization and lightness of the lens. By making the corresponding value of conditional formula (6) not exceed the upper limit, the change in the brightness of the optical image when changing the magnification can be suppressed. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (6-1), and further more preferably satisfies the following conditional formula (6-2).

[0236] 0.95 <Fnot / Fnow<1.8 (6)

[0237] 0.95 <Fnot / Fnow<1.46 (6-1)

[0238] 0.95 <Fnot / Fnow<1.1 (6-2)

[0239] When the focal length of the P lens group is set to fP, the zoom lens preferably satisfies the following conditional formula (7). By making the corresponding value of conditional formula (7) not less than the lower limit, the optical power of the P lens group will not become too strong, so it is easy to correct the spherical aberration on the telephoto side. By making the corresponding value of conditional formula (7) not exceed the upper limit, the optical power of the P lens group will not become too weak, so it is easy to make the P lens group have a large magnification effect. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (7-1), and further preferably satisfies the following conditional formula (7-2).

[0240] 0.5 <fP / fw<6 (7)

[0241] 1 <fP / fw<4 (7-1)

[0242] 1.26 <fP / fw<2.97 (7-2)

[0243] When the maximum half angle of view in the state of focusing on an infinitely distant object at the wide-angle end is set to ωw, the zoom lens preferably satisfies the following conditional formula (8). By making the corresponding value of conditional formula (8) not less than the lower limit, it is advantageous to widen the angle. By making the corresponding value of conditional formula (8) not exceed the upper limit, the height of the light passing through the first lens group G1 can be further reduced, which is advantageous to reduce the diameter. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (8-1), and further more preferably satisfies the following conditional formula (8-2).

[0244] 35<ωw<54 (8)

[0245] 38<ωw<50 (8-1)

[0246] 41<ωw<47 (8-2)

[0247] When the focal length of the M lens group is set to fM, the zoom lens preferably satisfies the following conditional formula (9). By making the corresponding value of conditional formula (9) not less than the lower limit, the optical power of the M lens group will not become too weak, so that the error sensitivity of the P lens group on the telephoto side, which is prone to become a problem in large-aperture, can be suppressed. This can help to achieve a zoom lens with good optical performance. By making the corresponding value of conditional formula (9) not exceed the upper limit, the optical power of the M lens group will not become too strong, so that the optical power of the P lens group can be enhanced. This can enhance the magnification effect of the P lens group, making it easy to shorten the total length of the lens system and ensure the desired magnification ratio. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (9-1), and further preferably satisfies the following conditional formula (9-2).

[0248] 0.01 <fw / fM<0.35 (9)

[0249] 0.015 <fw / fM<0.3 (9-1)

[0250] 0.019 <fw / fM<0.26 (9-2)

[0251] When the refractive index of the most image-side positive lens in the M lens group with respect to the d-line is NMp, the zoom lens preferably satisfies the following conditional expression (10). Generally speaking, as the refractive index of an optical material increases, the Abbe number tends to decrease.

[0252] By making the corresponding value of conditional expression (10) not less than the lower limit, a material with a smaller Abbe number can be used, so that chromatic aberration including axial chromatic aberration accompanying zooming can be easily corrected. By making the corresponding value of conditional expression (10) not exceed the upper limit, the refractive index will not become too high, so it is possible to suppress overcorrection of chromatic aberration. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (10-1), and further preferably satisfies the following conditional expression (10-2).

[0253] 1.73<NMp<2.5 (10)

[0254] 1.85 <NMp<2.3 (10-1)

[0255] 1.9 <NMp<2.1 (10-2)

[0256] When the Abbe number of the d-line reference of the positive lens closest to the image side in the positive lens group M is set to vMp, the zoom lens preferably satisfies the following conditional formula (11). By making the corresponding value of conditional formula (11) not less than the lower limit, the Abbe number will not become too small, so that over-correction of chromatic aberration can be suppressed. By making the corresponding value of conditional formula (11) not exceed the upper limit, the Abbe number will not become too large, so it is easy to correct chromatic aberration including axial chromatic aberration accompanying magnification change. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (11-1), and further more preferably satisfies the following conditional formula (11-2).

[0257] 10<vMp<50 (11)

[0258] 15<vMp<41 (11-1)

[0259] 17<vMp<37 (11-2)

[0260] The zoom lens preferably satisfies conditional expressions (10) and (11). The zoom lens more preferably satisfies at least one of conditional expressions (10-1), (10-2), (11-1) and (11-2) in addition to satisfying conditional expressions (10) and (11).

[0261] When the focal length of the first lens group G1 is set to f1, the zoom lens preferably satisfies the following conditional expression (12). By making the corresponding value of conditional expression (12) not less than the lower limit, the optical power of the first lens group G1 will not become too strong, so there is no need to configure a large number of lenses in the first lens group G1 to reduce distortion and chromatic aberration of magnification, and the lens closest to the object side of the first lens group G1 can be reduced in diameter. By making the corresponding value of conditional expression (12) not exceed the upper limit, the optical power of the first lens group G1 will not become too weak, so it is easy to appropriately ensure the focal length of the zoom lens at the wide-angle end. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional expression (12-1), and further more preferably satisfies the following conditional expression (12-2).

[0262] 1<(-f1) / fw<2.5 (12)

[0263] 1.15<(-f1) / fw<2.3 (12-1)

[0264] 1.22<(-f1) / fw<2.19 (12-2)

[0265] When the distance on the optical axis from the lens surface closest to the object side of the first lens group G1 to the lens surface closest to the image side of the first lens group G1 is DG1, the zoom lens preferably satisfies the following conditional expression (13). Figure 2The distance DG1 is shown in FIG. By making the corresponding value of conditional expression (13) not less than the lower limit, the space for configuring the lens in the first lens group G1 can be increased, which is conducive to reducing distortion and chromatic aberration of magnification. By making the corresponding value of conditional expression (13) not exceed the upper limit, the total thickness of the first lens group G1 can be thinned, so the weight of the lens on the object side in the zoom lens can be reduced. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (13-1), and further preferably satisfies the following conditional expression (13-2).

[0266] 0.71<DG1 / (fw×tanωw)<2.5 (13)

[0267] 0.8<DG1 / (fw×tanωw)<2.2 (13-1)

[0268] 0.97<DG1 / (fw×tanωw)<1.94 (13-2)

[0269] When the distance on the optical axis from the lens surface closest to the object side of the P lens group to the lens surface closest to the image side of the P lens group is defined as DGP, the zoom lens preferably satisfies the following conditional expression (14). Figure 2 The above distance DGP when the second lens group G2 corresponds to the P lens group is shown in . By making the corresponding value of conditional formula (14) not less than the lower limit, the space for configuring the lens in the P lens group can be increased, which is beneficial for suppressing the change of axial chromatic aberration and spherical aberration during zooming. By making the corresponding value of conditional formula (14) not exceed the upper limit, the total thickness of the P lens group can be thinned, so that a high zoom ratio and a large diameter can be achieved while reducing the weight of the lens. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (14-1), and further preferably satisfies the following conditional formula (14-2).

[0270] 0.35<DGP / (fw×tanωw)<2.5 (14)

[0271] 0.8<DGP / (fw×tanωw)<2.1 (14-1)

[0272] 1.4<DGP / (fw×tanωw)<1.9 (14-2)

[0273] When the distance on the optical axis from the lens surface closest to the object of the first lens group G1 to the paraxial entrance pupil position Penw in a state where the zoom lens is focused on an infinitely distant object at the wide-angle end is Denw, the zoom lens preferably satisfies the following conditional expression (15). Figure 2The above distance Denw and the paraxial incident pupil position Penw are shown in . By making the corresponding value of conditional expression (15) not less than the lower limit, the on-axis light beam wa and the off-axis light beam passing through the first lens group G1 can be properly separated, which is beneficial for correcting the chromatic aberration of magnification. By making the corresponding value of conditional expression (15) not exceed the upper limit, the paraxial incident pupil position Penw is located at a position closer to the object side, so the height of the off-axis light passing through the first lens group G1 from the optical axis Z can be reduced. This is beneficial for reducing the diameter and weight. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (15-1), and further preferably satisfies the following conditional expression (15-2).

[0274] 1<Denw / fw<2.2 (15)

[0275] 1.2 <Denw / fw<1.9 (15-1)

[0276] 1.28 <Denw / fw<1.82 (15-2)

[0277] When the average value of the specific gravity of all lenses of the first lens group G1 is set to Glave, the zoom lens preferably satisfies the following conditional formula (16). By making the corresponding value of conditional formula (16) not less than the lower limit, it is possible to select a material with a high refractive index and a material with a small Abbe number that has a relatively large specific gravity, which is beneficial for correcting chromatic aberration of magnification through the first lens group G1. By making the corresponding value of conditional formula (16) not exceed the upper limit, the first lens group G1 can be made lightweight, so that the center of gravity of the optical system can be located closer to the image side. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (16-1), and further more preferably satisfies the following conditional formula (16-2).

[0278] 1<Glave<5 (16)

[0279] 2.4 <Glave<4.5 (16-1)

[0280] 3 <Glave<4.15 (16-2)

[0281] When the average value of the specific gravity of all lenses of the P lens group is set to GPave, the zoom lens preferably satisfies the following conditional formula (17). By making the corresponding value of conditional formula (17) not less than the lower limit, it is possible to select a material with a high refractive index and a material with a small Abbe number that has a relatively large specific gravity, which is beneficial for correcting axial chromatic aberration through the P lens group. By making the corresponding value of conditional formula (17) not exceed the upper limit, the P lens group can be made lightweight, which is beneficial for suppressing the movement of the center of gravity when changing the magnification. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (17-1), and further preferably satisfies the following conditional formula (17-2).

[0282] 1 <GPave<5 (17)

[0283] 2.4<GPave<4.5 (17-1)

[0284] 3 <GPave<4.3 (17-2)

[0285] The zoom lens preferably satisfies the following conditional expression (18). Here, the average value of the specific gravity of all lenses in the focus group is set to Gfave. The distance on the optical axis from the lens surface closest to the object side of the focus group to the lens surface closest to the image side of the focus group is set to DGfoc. The focal length of the focus group is set to ffoc. As an example, Figure 2 The above distance DGfoc is shown in FIG. By making the corresponding value of conditional expression (18) not less than the lower limit, the optical focal length of the focus group can be enhanced, so that the movement of the focus group during focusing can be controlled, which is beneficial to shortening the total length of the lens system. By making the corresponding value of conditional expression (18) not exceed the upper limit, the focus group can be made lightweight, which is beneficial to the high speed and quietness of automatic focusing. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (18-1), and further preferably satisfies the following conditional expression (18-2).

[0286] 0.03 <Gfave×DGfoc / |ffoc|<0.9 (18)

[0287] 0.04 <Gfave×DGfoc / |ffoc|<0.52 (18-1)

[0288] 0.045 <Gfave×DGfoc / |ffoc|<0.15 (18-2)

[0289] The zoom lens preferably satisfies the following conditional formula (19). By making the corresponding value of conditional formula (19) not less than the lower limit, it is helpful to suppress the change of spherical aberration when changing the magnification. By making the corresponding value of conditional formula (19) not exceed the upper limit, it is helpful to suppress the change of distortion aberration when changing the magnification. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (19-1), and further more preferably satisfies the following conditional formula (19-2).

[0290] 0.3<(-f1) / fP<1.5 (19)

[0291] 0.35<(-f1) / fP<1.31 (19-1)

[0292] 0.48<(-f1) / fP<1.07 (19-2)

[0293] The zoom lens preferably satisfies the following conditional formula (20). By making the corresponding value of conditional formula (20) not less than the lower limit, the optical power of the M lens group can be enhanced while controlling the optical power of the first lens group G1, so that the error sensitivity of the P lens group located between the first lens group G1 and the M lens group can be suppressed. Thus, it can help to achieve a zoom lens with good optical performance. By making the corresponding value of conditional formula (20) not exceed the upper limit, the optical power of the M lens group can be enhanced while controlling the optical power of the first lens group G1, so that the magnification effect of the P lens group located between the first lens group G1 and the M lens group can be enhanced. Thus, it is easy to ensure the desired magnification ratio. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (20-1), and further preferably satisfies the following conditional formula (20-2).

[0294] 0<(-f1) / fM<0.7 (20)

[0295] 0.05<(-f1) / fM<0.6 (20-1)

[0296] 0.2<(-f1) / fM<0.55 (20-2)

[0297] The zoom lens preferably satisfies the following conditional formula (21). Conditional formula (21) is a formula that specifies the balance between the optical power of the P lens group and the optical power of the M lens group. By making the corresponding value of conditional formula (21) not less than the lower limit, the optical power of the P lens group can be controlled, and thus the error sensitivity of the P lens group can be suppressed. Thus, it can help to realize a zoom lens with good optical performance. By making the corresponding value of conditional formula (21) not exceed the upper limit, the optical power of the M lens group can be controlled, and thus the error sensitivity of the M lens group can be suppressed. Thus, it can help to realize a zoom lens with good optical performance. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (21-1), and further preferably satisfies the following conditional formula (21-2).

[0298] 0<fP / fM<2 (21)

[0299] 0.05 <fP / fM<1.2 (21-1)

[0300] 0.2 <fP / fM<0.59 (21-2)

[0301] The zoom lens preferably satisfies the following conditional formula (22). By making the corresponding value of conditional formula (22) not less than the lower limit, the optical power of the focus group can be controlled, so that the aberration change during focusing can be suppressed. By making the corresponding value of conditional formula (22) not exceed the upper limit, the optical power of the focus group can be enhanced, so the movement of the focus group during focusing can be controlled, which is conducive to shortening the total length of the lens system. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (22-1), and further more preferably satisfies the following conditional formula (22-2).

[0302] 1.2<(-ffoc) / (fw×tanωw)<5.5 (22)

[0303] 1.4<(-ffoc) / (fw×tanωw)<5 (22-1)

[0304] 1.7<(-ffoc) / (fw×tanωw)<4.7 (22-2)

[0305] The first lens group G1 preferably includes at least one aspheric lens satisfying the following conditional expression (23). Here, the paraxial curvature radius of the surface on the object side of the aspheric lens of the first lens group G1 is set to Rc1f. The paraxial curvature radius of the surface on the image side of the aspheric lens of the first lens group G1 is set to Rc1r. The curvature radius at the position of the maximum effective diameter of the surface on the object side of the aspheric lens of the first lens group G1 is set to Ry1f. The curvature radius at the position of the maximum effective diameter of the surface on the image side of the aspheric lens of the first lens group G1 is set to Ry1r. By making the corresponding value of the conditional expression (23) not less than the lower limit, the optical power of the peripheral side of the lens becomes weak, which is beneficial for correcting distortion aberration. By making the corresponding value of the conditional expression (23) not more than the upper limit, the optical power of the peripheral side of the lens becomes strong, which is beneficial for suppressing the astigmatism of off-axis light generated on the peripheral side of the lens. By configuring an aspheric lens satisfying conditional expression (23) at the position of the first lens group G1 where the on-axis light rays are separated from the off-axis light rays, it is advantageous to correct distortion aberration and astigmatism. In order to obtain better characteristics, at least one aspheric lens of the first lens group G1 preferably satisfies the following conditional expression (23-1), and further preferably satisfies the following conditional expression (23-2).

[0306] 1.05<(1 / Rc1f-1 / Rc1r) / (1 / Ry1f-1 / Ry1r)<8 (23)

[0307] 1.1<(1 / Rc1f-1 / Rc1r) / (1 / Ry1f-1 / Ry1r)<6 (23-1)

[0308] 1.15<(1 / Rc1f-1 / Rc1r) / (1 / Ry1f-1 / Ry1r)<4.7 (23-2)

[0309] As an illustration, Figure 3 An example of the position Px of the maximum effective diameter is shown in FIG. Figure 3 In the figure, the left side is the object side and the right side is the image side. Figure 3 In FIG. 1 , the on-axis beam Xa and the off-axis beam Xb passing through the lens Lx are shown. Figure 3 In the example, the upper ray of the off-axis beam Xb, i.e., ray Xb1, is the ray that passes through the outermost side. In this specification, twice the distance from the intersection of the ray that passes through the outermost side and the lens surface to the optical axis Z among the rays that enter the lens surface from the object side and are emitted to the image side is set as the "effective diameter" of the lens surface. The "outside" mentioned here refers to the radial outer side with the optical axis Z as the center, that is, the side away from the optical axis Z. Figure 3 In the example, twice the distance from the intersection of the object side surface of lens Lx and the light ray Xb1 to the optical axis Z becomes the effective diameter ED of the object side surface of lens Lx. And the position of the intersection of the outermost light ray and the lens surface becomes the position Px of the maximum effective diameter. Figure 3 In the example of , the upper ray of the off-axis beam Xb is the ray that passes through the outermost side, but which ray becomes the ray that passes through the outermost side varies depending on the optical system. Also, the ray that passes through the outermost side is determined in consideration of the entire zoom range.

[0310] The P lens group preferably includes at least one aspheric lens that satisfies the following conditional expression (24). Here, the paraxial curvature radius of the surface on the object side of the aspheric lens of the P lens group is set to RcPf. The curvature radius at the position of the maximum effective diameter of the surface on the object side of the aspheric lens of the P lens group is set to RyPf. The refractive index of the aspheric lens of the P lens group relative to the d-line is set to NP. By making the corresponding value of the conditional expression (24) not less than the lower limit, the optical focal length of the peripheral side of the surface on the object side of the aspheric lens of the P lens group can be changed to the negative side, which is beneficial to suppress the change of spherical aberration when the magnification is changed. By making the corresponding value of the conditional expression (24) not exceed the upper limit, the optical focal length of the peripheral side of the surface on the object side of the aspheric lens of the P lens group can be suppressed from changing to the negative side, which is beneficial to suppress the error sensitivity of the P lens group. By configuring the aspheric lens that satisfies the conditional expression (24) in the P lens group that plays a zooming role, it is beneficial to suppress the change of spherical aberration when the magnification is changed while controlling the error sensitivity of the P lens group. In order to obtain better characteristics, at least one aspherical lens in the P lens group more preferably satisfies the following conditional formula (24-1), and further preferably satisfies the following conditional formula (24-2).

[0311] 0.01<(1 / RcPf-1 / RyPf)×NP×fP<5 (24)

[0312] 0.075<(1 / RcPf-1 / RyPf)×NP×fP<2.5 (24-1)

[0313] 0.2<(1 / RcPf-1 / RyPf)×NP×fP<1.3 (24-2)

[0314] The N lens group preferably includes at least one aspheric lens that satisfies the following conditional expression (25). Here, the paraxial curvature radius of the surface on the object side of the aspheric lens of the N lens group is set to RcNf. The paraxial curvature radius of the surface on the image side of the aspheric lens of the N lens group is set to RcNr. The curvature radius at the position of the maximum effective diameter of the surface on the object side of the aspheric lens of the N lens group is set to RyNf. The curvature radius at the position of the maximum effective diameter of the surface on the image side of the aspheric lens of the N lens group is set to RyNr. By making the corresponding value of the conditional expression (25) not less than the lower limit, the optical power of the peripheral side of the lens becomes weak, which is beneficial to suppressing the error sensitivity of the N lens group. By making the corresponding value of the conditional expression (25) not exceed the upper limit, the difference between the optical power of the peripheral side of the lens and the optical power near the optical axis of the lens becomes smaller, which is beneficial to suppress the change of astigmatism when changing magnification. By configuring the aspheric lens that satisfies the conditional expression (25) in the N lens group, it is beneficial to suppress the change of astigmatism when changing magnification while controlling the error sensitivity of the N lens group. In order to obtain better characteristics, at least one aspherical lens in the N lens group more preferably satisfies the following conditional formula (25-1), and further preferably satisfies the following conditional formula (25-2).

[0315] 0.7<(1 / RcNf-1 / RcNr) / (1 / RyNf-1 / RyNr)<0.996 (25)

[0316] 0.8<(1 / RcNf-1 / RcNr) / (1 / RyNf-1 / RyNr)<0.99 (25-1)

[0317] 0.85<(1 / RcNf-1 / RcNr) / (1 / RyNf-1 / RyNr)<0.98 (25-2)

[0318] The final lens group preferably includes at least one aspheric lens that satisfies the following conditional expression (26). Here, the paraxial curvature radius of the surface on the object side of the aspheric lens of the final lens group is set to RcEf. The paraxial curvature radius of the surface on the image side of the aspheric lens of the final lens group is set to RcEr. The curvature radius at the position of the maximum effective diameter of the surface on the object side of the aspheric lens of the final lens group is set to RyEf. The curvature radius at the position of the maximum effective diameter of the surface on the image side of the aspheric lens of the N lens group is set to RyE r. By making the corresponding value of the conditional expression (26) not less than the lower limit, the optical focal length of the peripheral side of the lens becomes weaker than the optical focal length near the optical axis of the lens, which is beneficial for correcting image curvature. By making the corresponding value of the conditional expression (26) not exceed the upper limit, the optical focal length of the peripheral side of the lens becomes stronger, so that over-correction of image curvature can be suppressed. By configuring an aspheric lens that satisfies the conditional expression (26) in the final lens group, it is beneficial to correct image curvature. In order to obtain better characteristics, at least one aspherical lens in the final lens group more preferably satisfies the following conditional formula (26-1), and further preferably satisfies the following conditional formula (26-2).

[0319] 1.01<(1 / RcEf-1 / RcEr) / (1 / RyEf-1 / RyEr)<2 (26)

[0320] 1.05<(1 / RcEf-1 / RcEr) / (1 / RyEf-1 / RyEr)<1.5 (26-1)

[0321] 1.15<(1 / RcEf-1 / RcEr) / (1 / RyEf-1 / RyEr)<1.3 (26-2)

[0322] The first lens group G1 preferably includes at least one negative lens satisfying the following conditional expression (27). Here, the Abbe number of the d-line reference of the negative lens of the first lens group G1 is set to v ln. By making the corresponding value of the conditional expression (27) not less than the lower limit, it is advantageous to correct the chromatic aberration of magnification. By making the corresponding value of the conditional expression (27) not exceed the upper limit, it is possible to suppress the overcorrection of the chromatic aberration of magnification. In order to obtain better characteristics, at least one negative lens of the first lens group G1 more preferably satisfies the following conditional expression (27-1), and further preferably satisfies the following conditional expression (27-2).

[0323] 55<v ln<110 (27)

[0324] 57<v ln<95 (27-1)

[0325] 60<v ln<85 (27-2)

[0326] The first lens group G1 preferably includes at least one negative lens satisfying the following conditional expression (28). Here, the partial dispersion ratio between the g-line and the F-line of the negative lens of the first lens group G1 is set to θgF1n. By making the corresponding value of the conditional expression (28) not less than the lower limit, it is beneficial to correct the secondary chromatic aberration. By making the corresponding value of the conditional expression (28) not exceed the upper limit, it is possible to suppress the overcorrection of the secondary chromatic aberration. In order to obtain better characteristics, at least one negative lens of the first lens group G1 preferably satisfies the following conditional expression (28-1), and further preferably satisfies the following conditional expression (28-2).

[0327] 0.003<θgFln-(0.6438-0.001682×v ln)<0.05 (28)

[0328] 0.005<θgFln-(0.6438-0.001682×v ln)<0.04 (28-1)

[0329] 0.015<θgFln-(0.6438-0.001682×v ln)<0.033 (28-2)

[0330] Furthermore, when the refractive indices of a certain lens with respect to the g-line, F-line and C-line are respectively denoted as Ng, NF and NC, and the partial dispersion ratio between the g-line and F-line of the lens is denoted as θgF, θgF is defined by the following equation.

[0331] θgF=(Ng-NF) / (NF-NC)

[0332] At least one negative lens in the first lens group G1 preferably satisfies conditional expressions (27) and (28). At least one negative lens in the first lens group G1 more preferably satisfies at least one of conditional expressions (27-1), (27-2), (28-1) and (28-2) in addition to satisfying conditional expressions (27) and (28).

[0333] The P lens group preferably includes at least one negative lens satisfying the following conditional formula (29). Here, the Abbe number of the d-line reference of the negative lens of the P lens group is set to v Pn. By making the corresponding value of the conditional formula (29) not less than the lower limit, it is beneficial to correct the axial chromatic aberration. By making the corresponding value of the conditional formula (29) not exceed the upper limit, it is possible to suppress the over-correction of the axial chromatic aberration. In order to obtain better characteristics, at least one negative lens of the P lens group preferably satisfies the following conditional formula (29-1), and further preferably satisfies the following conditional formula (29-2).

[0334] 55<v Pn<110 (29)

[0335] 57<ν Pn<95 (29-1)

[0336] 60<v Pn<85 (29-2)

[0337] The P lens group preferably includes at least one negative lens satisfying the following conditional formula (30). Here, the partial dispersion ratio between the g line and the F line of the negative lens of the P lens group is set to θgFPn. By making the corresponding value of the conditional formula (30) not less than the lower limit, it is beneficial to correct the secondary axial chromatic aberration. By making the corresponding value of the conditional formula (30) not exceed the upper limit, it is possible to suppress the overcorrection of the secondary axial chromatic aberration. In order to obtain better characteristics, at least one negative lens of the P lens group preferably satisfies the following conditional formula (30-1), and further preferably satisfies the following conditional formula (30-2).

[0338] 0.003<θgFPn-(0.6438-0.001682×vPn)<0.05 (30)

[0339] 0.005<θgFPn-(0.6438-0.001682×vPn)<0.04 (30-1)

[0340] 0.015<θgFPn-(0.6438-0.001682×vPn)<0.033 (30-2)

[0341] At least one negative lens of the P lens group preferably satisfies conditional expressions (29) and (30). At least one negative lens of the P lens group more preferably satisfies at least one of conditional expressions (29-1), (29-2), (30-1) and (30-2) in addition to satisfying conditional expressions (29) and (30).

[0342] The N lens group preferably includes at least one negative lens satisfying the following conditional formula (31). Here, the Abbe number of the d-line reference of the negative lens of the N lens group is set to νNn. By making the corresponding value of the conditional formula (31) not less than the lower limit, it is beneficial to correct the chromatic aberration of magnification. By making the corresponding value of the conditional formula (31) not exceed the upper limit, it is possible to suppress the overcorrection of the chromatic aberration of magnification. In order to obtain better characteristics, at least one negative lens of the N lens group preferably satisfies the following conditional formula (31-1), and further preferably satisfies the following conditional formula (31-2).

[0343] 55<vNn<110 (31)

[0344] 57<vNn<95 (31-1)

[0345] 60<vNn<85 (31--12)

[0346] The N lens group preferably includes at least one negative lens satisfying the following conditional formula (32). Here, the partial dispersion ratio between the g line and the F line of the negative lens of the N lens group is set to θgFNn. By making the corresponding value of the conditional formula (32) not less than the lower limit, it is beneficial to correct the secondary chromatic aberration. By making the corresponding value of the conditional formula (32) not exceed the upper limit, it is possible to suppress the overcorrection of the secondary chromatic aberration. In order to obtain better characteristics, at least one negative lens of the N lens group preferably satisfies the following conditional formula (32-1), and further preferably satisfies the following conditional formula (32-2).

[0347] 0.003<θgFNn-(0.6438-0.001682×vNn)<0.05 (32)

[0348] 0.005<θgFNn-(0.6438-0.001682×vNn)<0.04 (32-1)

[0349] 0.015<θgFNn-(0.6438-0.001682×vNn)<0.033 (32-2)

[0350] At least one negative lens of the N lens group preferably satisfies conditional expressions (31) and (32). At least one negative lens of the N lens group more preferably satisfies at least one of conditional expressions (31-1), (31-2), (32-1) and (32-2) in addition to satisfying conditional expressions (31) and (32).

[0351] The M lens group preferably includes at least one negative lens satisfying the following conditional expression (33). Here, the Abbe number of the d-line reference of the negative lens of the M lens group is set to v Mn. By making the corresponding value of the conditional expression (33) not less than the lower limit, it is beneficial to correct the axial chromatic aberration. By making the corresponding value of the conditional expression (33) not exceed the upper limit, it is possible to suppress the overcorrection of the axial chromatic aberration. In order to obtain better characteristics, at least one negative lens of the M lens group more preferably satisfies the following conditional expression (33-1), and further preferably satisfies the following conditional expression (33-2).

[0352] 55<v Mn<110 (33)

[0353] 57<v Mn<95 (33-1)

[0354] 60 <v Mn<91 (33-2)

[0355] The M lens group preferably includes at least one negative lens satisfying the following conditional expression (34). Here, the partial dispersion ratio between the g-line and the F-line of the negative lens of the M lens group is set to θgFMn. By making the corresponding value of the conditional expression (34) not less than the lower limit, it is beneficial to correct the secondary axial chromatic aberration. By making the corresponding value of the conditional expression (34) not exceed the upper limit, it is possible to suppress the overcorrection of the secondary axial chromatic aberration. In order to obtain better characteristics, at least one negative lens of the M lens group more preferably satisfies the following conditional expression (34-1), and further preferably satisfies the following conditional expression (34-2).

[0356] 0.003<θgFMn-(0.6438-0.001682×v Mn)<0.06 (34)

[0357] 0.005<θgFMn-(0.6438-0.001682×v Mn)<0.05 (34-1)

[0358] 0.015<θgFMn-(0.6438-0.001682×v Mn)<0.045 (34-2)

[0359] At least one negative lens of the M lens group preferably satisfies conditional expressions (33) and (34). At least one negative lens of the M lens group more preferably satisfies at least one of conditional expressions (33-1), (33-2), (34-1) and (34-2) in addition to satisfying conditional expressions (33) and (34).

[0360] The final lens group preferably includes at least one positive lens satisfying the following conditional expression (35). Here, the Abbe number of the d-line reference of the positive lens of the final lens group is set to v Ep. By making the corresponding value of the conditional expression (35) not less than the lower limit, it is beneficial to correct the chromatic aberration of magnification. By making the corresponding value of the conditional expression (35) not exceed the upper limit, it is possible to suppress the overcorrection of the chromatic aberration of magnification. In order to obtain better characteristics, at least one positive lens of the final lens group preferably satisfies the following conditional expression (35-1), and further preferably satisfies the following conditional expression (35-2).

[0361] 55<v Ep<110 (35)

[0362] 57<v Ep<95 (35-1)

[0363] 60<v Ep<85 (35-2)

[0364] The final lens group preferably includes at least one positive lens satisfying the following conditional formula (36). Here, the partial dispersion ratio between the g-line and the F-line of the positive lens of the final lens group is set to θgFEp. By making the corresponding value of the conditional formula (36) not less than the lower limit, it is beneficial to correct the secondary chromatic aberration of magnification. By making the corresponding value of the conditional formula (36) not exceed the upper limit, it is possible to suppress the overcorrection of the secondary chromatic aberration of magnification. In order to obtain better characteristics, at least one positive lens of the final lens group preferably satisfies the following conditional formula (36-1), and further preferably satisfies the following conditional formula (36-2).

[0365] 0.003<θgFEp-(0.6438-0.001682×vEp)<0.05 (36)

[0366] 0.005<θgFEp-(0.6438-0.001682×vEp)<0.04 (36-1)

[0367] 0.015<θgFEp-(0.6438-0.001682×vEp)<0.033 (36-2)

[0368] At least one positive lens in the final lens group preferably satisfies conditional expressions (35) and (36). At least one positive lens in the final lens group more preferably satisfies at least one of conditional expressions (35-1), (35-2), (36-1) and (36-2) in addition to satisfying conditional expressions (35) and (36).

[0369] The first lens group G1 preferably includes at least one positive lens satisfying the following conditional formula (37). Here, the refractive index of the positive lens of the first lens group G1 with respect to the d-line is set to N1p. By making the corresponding value of the conditional formula (37) not less than the lower limit, it is beneficial to correct the image curvature. By making the corresponding value of the conditional formula (37) not exceed the upper limit, it is possible to suppress excessive correction of the image curvature. In order to obtain better characteristics, at least one positive lens of the first lens group G1 more preferably satisfies the following conditional formula (37-1), and further preferably satisfies the following conditional formula (37-2).

[0370] 1.8<N1p<2.3 (37)

[0371] 1.89<N1p<2.2 (37-1)

[0372] 1.92<N1p<2.15 (37-2)

[0373] The first lens group G1 preferably includes at least one positive lens satisfying the following conditional expression (38). Here, the Abbe number of the d-line reference of the positive lens of the first lens group G1 is set to v1p. By making the corresponding value of the conditional expression (38) not less than the lower limit, it is beneficial to correct the chromatic aberration of magnification. By making the corresponding value of the conditional expression (38) not exceed the upper limit, it is possible to suppress the overcorrection of the chromatic aberration of magnification. In order to obtain better characteristics, at least one positive lens of the first lens group G1 more preferably satisfies the following conditional expression (38-1), and further preferably satisfies the following conditional expression (38-2).

[0374] 10<v1p<45 (38)

[0375] 13<v1p<35 (38-1)

[0376] 16<v1p<25 (38-2)

[0377] At least one positive lens in the first lens group G1 preferably satisfies conditional expressions (37) and (38). At least one positive lens in the first lens group G1 more preferably satisfies at least one of conditional expressions (37-1), (37-2), (38-1) and (38-2) in addition to satisfying conditional expressions (37) and (38).

[0378] The subsequent group GR preferably includes an aperture stop St, and at least one negative lens with its concave surface facing the object side is arranged at a position that satisfies the following conditional expression (39) and is closer to the image side than the aperture stop St. Here, the distance on the optical axis between the aperture stop St and the negative lens with its concave surface facing the object side when the wide-angle end is focused on an object at infinity, is set to DSInw. The sum of the distance on the optical axis from the lens surface on the most object side of the first lens group G1 to the lens surface on the most image side of the subsequent group GR when the wide-angle end is focused on an object at infinity, and the back focal length of the entire system at the air conversion distance is set to TLw. As an example, Figure 2 The distance DSInw is shown in FIG. By making the corresponding value of conditional expression (39) not less than the lower limit, it is beneficial to ensure the space for configuring the aperture mechanism. By making the corresponding value of conditional expression (39) not exceed the upper limit, a negative lens with the concave surface facing the object side can be configured near the aperture stop St, which is beneficial for correcting spherical aberration and axial chromatic aberration. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (39-1), and further preferably satisfies the following conditional expression (39-2).

[0379] 0.001 <DSInw / TLw<0.12 (39)

[0380] 0.005 <DSInw / TLw<0.085 (39-1)

[0381] 0.01 <DSInw / TLw<0.075 (39-2)

[0382] The subsequent group GR preferably includes an aperture stop St, and at least one negative lens having a concave surface facing the image side is arranged at a position that satisfies the following conditional expression (40) and is closer to the object side than the aperture stop St. Here, the distance on the optical axis between the aperture stop St in a state where the aperture stop St is focused on an infinitely distant object at the wide-angle end and the negative lens having a concave surface facing the image side is DSOnw. As an example, Figure 2 The distance DSONw is shown in FIG. By making the corresponding value of conditional expression (40) not less than the lower limit, it is advantageous to ensure space for configuring the aperture mechanism. By making the corresponding value of conditional expression (40) not exceed the upper limit, a negative lens with a concave surface facing the image side can be configured near the aperture stop St, which is advantageous for correcting spherical aberration and axial chromatic aberration. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (40-1), and further preferably satisfies the following conditional expression (40-2).

[0383] 0.001 <DSOnw / TLw<0.18 (40)

[0384] 0.01 <DSOnw / TLw<0.085 (40-1)

[0385] 0.03 <DSOnw / TLw<0.075 (40-2)

[0386] The subsequent group GR includes an aperture stop St, and at least one bonding lens is arranged on the image side of the aperture stop St. The bonding lens preferably satisfies the following conditional formula (41). Here, the distance on the optical axis between the bonding surface of the aperture stop St and the bonding lens on the image side of the aperture stop St when the wide-angle end is focused on an infinitely distant object is set to DSIcew. In the case where the bonding lens has multiple bonding surfaces, it is preferred that at least one bonding surface satisfies the conditional formula (41). By ensuring that the corresponding value of the conditional formula (41) is not less than the lower limit, it is beneficial to ensure space for configuring the aperture mechanism. By ensuring that the corresponding value of the conditional formula (41) does not exceed the upper limit, the above-mentioned bonding surface can be arranged at a position close to the aperture stop St, which is beneficial to correcting spherical aberration and axial chromatic aberration. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (41-1), and further preferably satisfies the following conditional formula (41-2).

[0387] 0.001 <DSIcew / TLw<0.12 (41)

[0388] 0.005 <DSIcew / TLw<0.085 (41-1)

[0389] 0.01 <DSIcew / TLw<0.075 (41-2)

[0390] The subsequent group GR includes an aperture stop St, and at least one bonding lens is arranged on the object side closer to the aperture stop St. The bonding lens preferably satisfies the following conditional expression (42). Here, the distance on the optical axis between the bonding surface of the aperture stop St and the bonding lens closer to the object side than the aperture stop St in a state where the aperture stop St is focused on an infinitely distant object at the wide-angle end is set to DSOcew. In the case where the bonding lens has multiple bonding surfaces, it is preferred that at least one bonding surface satisfies the conditional expression (42). By making the corresponding value of the conditional expression (42) not less than the lower limit, it is beneficial to ensure space for configuring the aperture mechanism. By making the corresponding value of the conditional expression (42) not exceed the upper limit, the above-mentioned bonding surface can be arranged at a position close to the aperture stop St, which is beneficial to correcting spherical aberration and axial chromatic aberration. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (42-1), and further preferably satisfies the following conditional expression (42-2).

[0391] 0.001 <DSOcew / TLw<0.18 (42)

[0392] 0.01 <DSOcew / TLw<0.085 (42-1)

[0393] 0.03 <DSOcew / TLw<0.075 (42-2)

[0394] The zoom lens preferably satisfies the following conditional expression (43). Here, the movement amount of the N lens group when changing the magnification from the wide angle end to the telephoto end is set to ΔN. The movement amount of the P lens group when changing the magnification from the wide angle end to the telephoto end is set to ΔP. The sign of each movement amount when changing the magnification is set to negative when moving toward the object side and to positive when moving toward the image side. As an example, Figure 2 The movement amount ΔN when the 4th lens group G4 corresponds to the N lens group is shown in . By making the corresponding value of conditional formula (43) not less than the lower limit, the N lens group moves near the telephoto end and near the P lens group, which is beneficial to suppress the change of spherical aberration near the telephoto end. By making the corresponding value of conditional formula (43) not exceed the upper limit, the N lens group moves near the telephoto end and at a position away from the P lens group, which is beneficial to suppress the change of image curvature near the telephoto end. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional formula (43-1), and further preferably satisfies the following conditional formula (43-2).

[0395] 0.1<ΔN / ΔP<0.75 (43)

[0396] 0.13<ΔN / ΔP<0.5 (43-1)

[0397] 0.25<ΔN / ΔP<0.37 (43-2)

[0398] The zoom lens preferably satisfies the following conditional expression (44). Here, the sum of the distance on the optical axis from the paraxial exit pupil position Pexw to the lens surface closest to the image side of the subsequent group GR when the wide-angle end is focused on an infinitely distant object and the back focal length of the entire system at the air conversion distance is set to Dexw. As an example, Figure 2 The paraxial exit pupil position Pexw is shown in the state where the wide-angle end is focused on an infinitely distant object. By making the corresponding value of conditional expression (44) not less than the lower limit, the paraxial exit pupil can be brought close to the object side, which is beneficial for ensuring the peripheral light amount. By making the corresponding value of conditional expression (44) not exceed the upper limit, the paraxial exit pupil can be brought close to the image side, which is beneficial for miniaturization. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (44-1), and further preferably satisfies the following conditional expression (44-2).

[0399] 1.5 <Dexw / (fw×tanωw)<5 (44)

[0400] 1.8 <Dexw / (fw×tanωw)<4.5 (44-1)

[0401] 2.2 <Dexw / (fw×tanωw)<3.6 (44-2)

[0402] The zoom lens preferably satisfies the following conditional expression (45). Here, the open F value in the state of focusing on an infinitely distant object at the telephoto end is set to Fnot. The distance on the optical axis from the lens surface closest to the object side of the P lens group to the lens surface closest to the image side of the P lens group is set to DGP. By making the corresponding value of the conditional expression (45) not less than the lower limit, it is possible to ensure sufficient space for arranging multiple lenses in the P lens group, which is beneficial for correcting axial chromatic aberration. By making the corresponding value of the conditional expression (45) not exceed the upper limit, the thickness of the P lens group can be suppressed, which is beneficial for shortening the total length of the lens system. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (45-1), and further preferably satisfies the following conditional expression (45-2).

[0403] 0.4<Fnot×DGP / ft<4 (45)

[0404] 0.8 <Fnot×DGP / ft<3.4 (45-1)

[0405] 1.2 <Fnot×DGP / ft<2 (45-2)

[0406] The zoom lens preferably satisfies the following conditional expression (46). Here, the open F value in the state of focusing on an infinitely distant object at the telephoto end is set to Fnot. The distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is set to DGP. The distance on the optical axis from the lens surface of the M lens group closest to the object side to the lens surface of the M lens group closest to the image side is set to DG M. By making the corresponding value of the conditional expression (46) not less than the lower limit, it is possible to ensure sufficient space for arranging multiple lenses in the P lens group and the M lens group, which is beneficial for correcting axial chromatic aberration. By making the corresponding value of the conditional expression (46) not exceed the upper limit, the thickness of the P lens group and the M lens group can be suppressed, which is beneficial for shortening the total length of the lens system. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (46-1), and further preferably satisfies the following conditional expression (46-2).

[0407] 0.4 <Fnot×(DGP+DGM) / ft<4 (46)

[0408] 0.75 <Fnot×(DGP+DGM) / ft<3.4 (46-1)

[0409] 0.97 <Fnot×(DGP+DGM) / ft<2.93 (46-2)

[0410] The zoom lens preferably satisfies the following conditional expression (47). Here, the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group G1 to the lens surface closest to the image side of the subsequent group GR in the state of focusing on an infinitely distant object at the telephoto end and the back focal length of the entire system at the air conversion distance is set to TLt. By making the corresponding value of conditional expression (47) not less than the lower limit, it is possible to ensure space for each lens group to move when changing the magnification, which is conducive to high magnification ratio. By making the corresponding value of conditional expression (47) not exceed the upper limit, the total length of the lens system can be shortened, which is conducive to miniaturization. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (47-1), and further preferably satisfies the following conditional expression (47-2).

[0411] 1.2 <TLt / ft<5 (47)

[0412] 1.4 <TLt / ft<4 (47-1)

[0413] 1.66 <TLt / ft<3.02 (47-2)

[0414] When the focal length of the final lens group is set to fE, the zoom lens preferably satisfies the following conditional formula (48). By making the corresponding value of conditional formula (48) not less than the lower limit, it is beneficial to ensure the back focal length. By making the corresponding value of conditional formula (48) not exceed the upper limit, it is beneficial to shorten the total length of the lens system. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (48-1), and further more preferably satisfies the following conditional formula (48-2).

[0415] 0.1<fw / fE<0.7 (48)

[0416] 0.17 <fw / fE<0.5 (48-1)

[0417] 0.25 <fw / fE<0.42 (48-2)

[0418] The zoom lens preferably satisfies the following conditional expression (49). Here, the lateral magnification of the focus group in the state of focusing on an infinite object at the wide-angle end is set to β fw. The composite lateral magnification of all lenses closer to the image side than the focus group in the state of focusing on an infinite object at the wide-angle end is set to β fRw. By making the corresponding value of conditional expression (49) not less than the lower limit, the movement amount of the focus group during focusing can be controlled, which is conducive to shortening the total length of the lens system. By making the corresponding value of conditional expression (49) not exceed the upper limit, it is conducive to suppressing the error sensitivity of the focus group. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional expression (49-1), and further more preferably satisfies the following conditional expression (49-2).

[0419] 0.3<|(1-βfw 2 )×βfRw 2 |<3 (49)

[0420] 0.4<|(1-βfw 2 )×βfRw 2 |<2.5 (49-1)

[0421] 0.5<|(1-βfw 2 )×βfRw 2 |<1.56 (49-2)

[0422] The zoom lens preferably satisfies the following conditional expression (50). Here, the lateral magnification of the focus group in the state of focusing on an infinitely distant object at the telephoto end is set to βft. The composite lateral magnification of all lenses closer to the image side than the focus group in the state of focusing on an infinitely distant object at the telephoto end is set to βfRt. By making the corresponding value of conditional expression (50) not less than the lower limit, the movement amount of the focus group during focusing can be controlled, which is beneficial for shortening the total length of the lens system. By making the corresponding value of conditional expression (50) not exceed the upper limit, it is beneficial to suppress the error sensitivity of the focus group. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (50-1), and further preferably satisfies the following conditional expression (50-2).

[0423] 0.5<|(1-βft 2 )×βfRt 2 |<4 (50)

[0424] 0.7<|(1-βft 2 )×βfRt 2 |<3 (50-1)

[0425] 1.2<|(1-βft 2 )×βfRt 2 |<2.7 (50-2)

[0426] The zoom lens preferably satisfies the following conditional expression (51). Here, the lateral magnification of the focusing group in a state where the wide-angle end focuses on an infinitely distant object is set to βfw. The composite lateral magnification of all lenses on the image side of the focusing group in a state where the wide-angle end focuses on an infinitely distant object is set to βfRw. The focal length of the focusing group is set to ffoc. The composite focal length of all lenses on the image side of the focusing group in a state where the wide-angle end focuses on an infinitely distant object is set to ffRw. The sum of the distance on the optical axis from the paraxial exit pupil position Pexw to the lens surface on the image side of the subsequent group in a state where the wide-angle end focuses on an infinitely distant object and the back focal length of the entire system in the air conversion distance is set to Dexw. Using the above notations, γw and BRw are defined as follows.

[0427] Yw=(1-βfw 2 )× βfRw 2 ,

[0428] BRw={β fw / (ffoc × γw)-1 / (βfRw × ffRw)-(1 / DeXW)}

[0429] By making the corresponding value of conditional expression (51) not less than the lower limit, it is advantageous for miniaturization. By making the corresponding value of conditional expression (51) not more than the upper limit, it is possible to suppress the change in viewing angle when focusing at the wide-angle end. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (51-1), and further preferably satisfies the following conditional expression (51-2).

[0430] 0<(-BRw)×(fw×tanωw)<0.7 (51)

[0431] 0<(-BRw)×(fw×tanωw)<0.4 (51-1)

[0432] 0<(-BRw)×(fw×tanωw)<0.24 (51-2)

[0433] The zoom lens preferably satisfies the following conditional expression (52). Here, the lateral magnification of the focusing group in a state where the telephoto end is focused on an object at infinity is set to βft. The composite lateral magnification of all lenses on the image side of the focusing group in a state where the telephoto end is focused on an object at infinity is set to ββfRt. The focal length of the focusing group is set to ffoc. The composite focal length of all lenses on the image side of the focusing group in a state where the telephoto end is focused on an object at infinity is set to ffRt. The sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group in a state where the telephoto end is focused on an object at infinity and the back focal length of the entire system in the air conversion distance is set to Dext. The maximum half viewing angle in a state where the telephoto end is focused on an object at infinity is set to ωt.

[0434] Using the above notations, γt and BRt are defined as follows.

[0435] γt=(1-βft 2 )×βfRt 2 ,

[0436] BRt={βft / (ffoc×γt)-1 / (βfRt×ffRt)-(1 / Dext)}

[0437] By making the corresponding value of conditional expression (52) not less than the lower limit, it is advantageous for miniaturization. By making the corresponding value of conditional expression (52) not more than the upper limit, it is possible to suppress the change in the viewing angle when focusing at the telephoto end. In order to obtain better characteristics, the zoom lens preferably satisfies the following conditional expression (52-1), and further preferably satisfies the following conditional expression (52-2).

[0438] 0<(-BRt)×(ft×tanωt)<0.5 (52)

[0439] 0<(-BRt)×(ft×tanωt)<0.3 (52-1)

[0440] 0<(-BRt)×(ft×tanωt)<0.13 (52-2)

[0441] In a structure in which at least one of the lens closest to the object side of the zoom lens and the second lens from the object side of the zoom lens is a negative lens, when the refractive index of the negative lens with respect to the d-line is set to Nobn, the zoom lens preferably satisfies the following conditional formula (53). In particular, it is preferred that the lens closest to the object side of the zoom lens is a negative lens and satisfies the following conditional formula (53). By making the corresponding value of the conditional formula (53) not lower than the lower limit, it is beneficial to suppress distortion aberration and image curvature. By making the corresponding value of the conditional formula (53) not exceed the upper limit, it is beneficial to suppress chromatic aberration of magnification. In order to obtain better characteristics, the zoom lens more preferably satisfies the following conditional formula (53-1), and further more preferably satisfies the following conditional formula (53-2).

[0442] 1.7 <Nobn<2.2 (53)

[0443] 1.76 <Nobn<2 (53-1)

[0444] 1.81<Nobn<1.9 (53-2)

[0445] The movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end can be configured to have five different movement trajectories. In other words, the movement trajectories of the lens groups that move when zooming can be configured to have five different movement trajectories. In this case, it is advantageous to simplify the drive mechanism while obtaining a high zoom ratio.

[0446] Alternatively, the movement trajectories of the lens groups that move when changing magnification from the wide-angle end to the telephoto end may be four or three different movement trajectories. In this case, the driving mechanism can be simplified and lightweight.

[0447] In addition, as in the embodiments described later, in the case where there are multiple lens groups that move along the same movement trajectory when zooming from the wide-angle end to the telephoto end, the movement trajectory is counted as one type for the multiple lens groups. In the technology of the present invention, if the movement trajectories are different from each other in a part of the zoom area in the entire zoom area, even if the movement trajectories are the same in other parts of the zoom area, they can be regarded as different movement trajectories when zooming from the wide-angle end to the telephoto end. And, of course, the above-mentioned "movement trajectory" relates to the lens group that moves when zooming, and does not relate to the lens group that is fixed when zooming.

[0448] The zoom lens may be configured to include a plurality of lens groups that move along the same movement trajectory when zooming from the wide-angle end to the telephoto end. In this case, the lens groups that move along the same movement trajectory can be driven by one cam, thereby simplifying the drive mechanism of the lens groups. In addition, the above-mentioned "the same movement trajectory when zooming from the wide-angle end to the telephoto end" means that the movement trajectory is the same in the entire zoom range from the wide-angle end to the telephoto end.

[0449] in addition, Figure 1 The example shown is an example, and various modifications can be made within the scope of the technical spirit of the present invention. For example, the number of lens groups included in the subsequent group GR and the number of lenses included in each lens group can be set to the same as Figure 1 Examples of different quantities.

[0450] For example, the rear group GR may be composed of three lens groups or five lens groups. The focus group may be composed of one lens.

[0451] Furthermore, for example, a configuration may be adopted in which one lens group is included between the first lens group G1 and the lens group P. In this case, it is advantageous in suppressing the variation of distortion aberration during zooming.

[0452] The first lens group G1 may be configured to include a negative lens, a negative lens, and a positive lens in order from the object side to the image side. The first lens group G1 may be configured to include a negative lens, a negative lens, a negative lens, and a positive lens in order from the object side to the image side. The first lens group G1 may be configured to include a negative lens and a negative lens in order from the object side to the image side.

[0453] The focusing group preferably has negative optical power. In this case, the movement of the focusing group during focusing can be suppressed, which is conducive to miniaturization and lightness of the entire system. The focusing group preferably includes at least one negative lens. In this case, it is conducive to suppressing the change of chromatic aberration during focusing.

[0454] The focusing group may be configured to include one negative lens. In this case, it is advantageous to miniaturize the lens. Alternatively, the focusing group may be configured to include a positive lens and a negative lens. In this case, it is advantageous to suppress the variation of chromatic aberration during focusing.

[0455] The number of lenses included in the final lens group GE may be 2 or less, which is advantageous for miniaturization.

[0456] The above-mentioned preferred structures and possible structures can be any combination, and are preferably appropriately and selectively adopted according to the required specifications. In addition, the conditional expressions preferably satisfied by the zoom lens of the present invention are not limited to the conditional expressions recorded in the form of formulas, but also include all conditional expressions obtained by arbitrarily combining the lower limit and the upper limit from the preferred, more preferred and further preferred conditional expressions.

[0457] For example, a preferred first embodiment of the zoom lens of the present invention is as follows: from the object side to the image side, it includes a first lens group G1 having negative optical focal length and a subsequent group GR, the subsequent group GR includes at least three lens groups, one of the at least three lens groups is a P lens group having positive optical focal length, when changing the magnification, the interval between the first lens group G1 and the subsequent group GR changes, all intervals between adjacent lens groups in the subsequent group GR change, and the above-mentioned conditional expressions (1) and (2) are satisfied.

[0458] The preferred second mode of the zoom lens of the present invention is that in the above-mentioned first mode, the P lens group has the largest movement toward the object side when changing the magnification from the wide-angle end to the telephoto end among the lens groups in the subsequent group GR, includes an N lens group with negative optical focal length on the image side closer to the P lens group, includes an M lens group between the P lens group and the N lens group, and satisfies the above-mentioned conditional expression (3).

[0459] Next, embodiments of the zoom lens of the present invention are described with reference to the accompanying drawings. In addition, the reference symbols marked on the lenses in the cross-sectional views of each embodiment are used independently in each embodiment to avoid the complication of the description and drawings caused by the increase in the number of digits of the reference symbols. Therefore, even if the drawings of different embodiments are marked with common reference symbols, they are not necessarily common structures.

[0460] [Example 1]

[0461] The structure and movement trajectory of the zoom lens of Example 1 are shown in FIG. Figure 1 , the illustration method and structure are as described above, so part of the repeated description is omitted here. The zoom lens of Example 1 includes, from the object side to the image side, a first lens group G1 with negative optical focal power, a second lens group G2 with positive optical focal power, a third lens group G3 with positive optical focal power, a fourth lens group G4 with negative optical focal power, and a fifth lens group G5 with positive optical focal power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4 and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3 and the fourth lens group G4 change the interval with the adjacent lens group and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. The focusing group includes the fourth lens group G4, and when focusing from an infinitely distant object to the nearest object, the focusing group moves toward the image side.

[0462] Regarding the zoom lens of Example 1, basic lens data is shown in Table 1, specifications and variable surface intervals are shown in Table 2, and aspheric surface coefficients are shown in Table 3.

[0463] The basic lens data table is as follows. The Sn column shows the face number when the face closest to the object side is set as the first face and the face number increases one by one toward the image side. The R column shows the radius of curvature of each face. The D column shows the face spacing on the optical axis between each face and the face adjacent to its image side. The Nd column shows the refractive index of each component relative to the d-line. The νd column shows the Abbe number of each component based on the d-line. The θgF column shows the partial dispersion ratio between the g-line and the F-line of each component. The ED column shows the effective diameter of each face. The SG column shows the specific gravity of each component.

[0464] In the table of basic lens data, the sign of the radius of curvature of the surface that makes the convex shape face the object side is set to positive, and the sign of the radius of curvature of the surface that makes the convex shape face the image side is set to negative. Table 1 also shows the aperture stop St and the optical component PP. The surface number and the term (St) are recorded in the surface number column corresponding to the aperture stop St. The value of the bottom column of the surface spacing column of the table is the interval between the surface closest to the image side in the table and the image plane Sim. For variable surface spacing, the symbol DD[] is used, and the surface number on the object side of the interval is marked in [] and recorded in the surface spacing column.

[0465] In Table 2, the zoom ratio Zr, focal length f, back focal length Bf at air conversion distance, open F value Fno., maximum total viewing angle 2ω, and variable surface interval are shown based on the d-line reference. The zoom ratio has the same meaning as the zoom factor. The [°] in the 2ω column indicates the unit is degree. In Table 2, the columns marked with "Wide" show the values ​​of the wide-angle end state, the columns marked with "Middle" show the values ​​of the middle focal length state, and the columns marked with "Tele" show the values ​​of the telephoto end state.

[0466] In the basic lens data, the surface number of the aspheric surface is marked with an * mark, and the value of the paraxial curvature radius is recorded in the curvature radius column of the aspheric surface. In Table 3, the surface number of the aspheric surface is shown in the Sn row, and the numerical values ​​of the aspheric coefficients of each aspheric surface are shown in the KA and Am rows. In addition, m in Am is an integer greater than 3 and varies depending on the surface. For example, in the third surface of Example 1, m = 3, 4, 5, ..., 16. The numerical values ​​of the aspheric coefficients in Table 3 "E±n" (n: integer) mean "×10 ±n KA and Am are aspherical coefficients in the aspherical formula represented by the following formula.

[0467] Zd=C×h 2 / {1+(1-KA×C2 ×h 2 ) 1 / 2}+∑Am×h m

[0468] in,

[0469] Zd: Aspheric depth (the length of the perpendicular line from a point on the aspheric surface at height h to a plane tangent to the aspheric vertex and perpendicular to the optical axis Z)

[0470] h: Height (distance from the optical axis Z to the lens surface)

[0471] C: The reciprocal of the paraxial radius of curvature

[0472] KA, Am: Aspheric coefficients

[0473] , the aspherical ∑ represents the sum related to m.

[0474] In the data of each table, degrees are used as the unit of angle and millimeters are used as the unit of length, but since the optical system can be used at a magnified or reduced scale, other appropriate units can also be used. In addition, the values ​​rounded to a preset number of digits are recorded in each table shown below.

[0475] [Table 1]

[0476] Example 1

[0477]

[0478]

[0479] [Table 2]

[0480] Example 1

[0481] Wide Middle Tele Zr 1.00 1.92 3.24 f 16.49 31.67 53.42 Bf 14.99 14.99 14.99 Fno. 2.88 2.88 2.88 2ω[°] 86.6 47.0 28.8 DD[6] 51.6174 16.0969 0.5002 DD

[13] 1.0009 9.6899 19.2758 DD

[19] 2.0000 6.4820 13.1251 DD

[23] 4.3588 7.5436 14.6990

[0482] [Table 3]

[0483] Example 1

[0484]

[0485] exist Figure 4 , various aberration diagrams are shown when the zoom lens of Example 1 is in focus on an object at infinity. Figure 4 In the figure, spherical aberration, astigmatism, distortion and chromatic aberration of magnification are shown from left to right. Figure 4In the figure, the aberrations at the wide-angle end state are shown in the upper section marked with "Wide", the aberrations at the intermediate focal length state are shown in the middle section marked with "Middle", and the aberrations at the telephoto end state are shown in the lower section marked with "Tele". In the spherical aberration diagram, aberrations on the d-line, C-line, F-line and g-line are shown with solid lines, long dashed lines, short dashed lines and single-dash lines, respectively. In the astigmatism diagram, aberrations on the d-line in the sagittal direction are shown with solid lines, and aberrations on the d-line in the meridional direction are shown with short dashed lines. In the distortion diagram, aberrations on the d-line are shown with solid lines. In the lateral chromatic aberration diagram, aberrations on the C-line, F-line and g-line are shown with long dashed lines, short dashed lines and single-dash lines, respectively. In the spherical aberration diagram, the value of the open F value is shown after Fno.=. In other aberration diagrams, the value of the maximum half viewing angle is shown after ω=.

[0486] Unless otherwise specified, the symbols, meanings, recording methods, and graphical representation methods of the data related to the above-mentioned first embodiment are basically the same in the following embodiments, and therefore, repeated descriptions are omitted below.

[0487] [Example 2]

[0488] The structure and movement trajectory of the zoom lens of Example 2 are shown in FIG. Figure 5 . The zoom lens of Example 2 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0489] The first lens group G1 includes four lenses, L11 to L14, in order from the object side to the image side. The second lens group G2 includes four lenses, L21 to L24, in order from the object side to the image side. The third lens group G3 includes three lenses, aperture stop St and lenses L31 to L33, in order from the object side to the image side. The fourth lens group G4 includes two lenses, L41 to L42, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51.

[0490] Regarding the zoom lens of Example 2, basic lens data is shown in Table 4, specifications and variable surface intervals are shown in Table 5, aspheric coefficients are shown in Table 6, and various aberration diagrams are shown in Table 8. Figure 6 .

[0491] [Table 4]

[0492] Example 2

[0493] Sn R D Nd ν d θgF ED SG 1 56.8390 1.3499 1.85883 30.00 0.59793 45.533 3.750 2 22.6435 8.7886 37.112 *3 51.9482 1.9991 1.51633 64.06 0.53345 36.888 2.380 *4 31.9284 5.6543 35.841 5 -68.5857 1.1096 1.48749 70.44 0.53062 35.640 2.450 6 41.3331 4.9934 1.92119 23.96 0.62025 35.206 3.840 7 276.7851 DD[7] 34.800 *8 39.2575 3.6402 1.69350 53.20 0.54661 29.400 3.520 *9 80.3771 0.2015 29.799 10 63.3714 3.6404 1.67270 32.10 0.59891 30.095 2.910 11 -260.4744 6.9991 30.070 12 84.5802 0.9974 1.80518 25.42 0.61616 29.126 3.370 13 22.6229 9.0117 1.53775 74.70 0.53936 28.129 3.640 14 -48.4802 DD

[14] 28.159 15(St) ∞ 2.9146 21.096 16 -470.5170 5.2673 1.49700 81.61 0.53887 20.496 3.700 17 -17.3282 0.7972 1.72047 34.71 0.58350 20.226 3.190 18 93.2266 2.0917 20.583 19 61.2163 3.5028 1.91082 35.25 0.58224 21.316 4.970 20 -47.0517 DD

[20] 21.295 21 -118.0060 1.8834 1.94595 17.98 0.65460 15.649 3.510 22 -36.8433 3.0660 15.500 *23 -31.1957 0.9987 1.68948 31.02 0.59874 15.260 2.880 *24 21.3427 DD

[24] 15.938 *25 68.5032 6.0050 1.49710 81.56 0.53848 27.000 3.640 *26 -30.0585 12.5138 27.265 27 ∞ 2.8500 1.51680 64.20 0.53430 28.667 2.520 28 ∞ 1.1102 28.851

[0494] [Table 5]

[0495] Example 2

[0496] Wide Middle Tele Zr 1.00 1.92 3.24 f 16.49 31.67 53.42 Bf 15.50 15.50 15.50 Fno. 2.88 2.88 2.88 2ω[°] 86.2 47.8 29.2 DD[7] 50.2498 16.1562 0.4991 DD

[14] 0.9999 9.9347 20.6699 DD

[20] 1.9995 5.6384 11.4528 DD

[24] 4.0871 8.8326 16.3817

[0497] [Table 6]

[0498] Example 2

[0499]

[0500] [Example 3]

[0501] The structure and movement trajectory of the zoom lens of Example 3 are shown in FIG. Figure 7 . The zoom lens of Example 3 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having negative optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0502] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 includes four lenses, aperture stop St and lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 includes one lens, L41. The fifth lens group G5 includes two lenses, L51 to L52, in order from the object side to the image side.

[0503] Regarding the zoom lens of Example 3, basic lens data is shown in Table 7, specifications and variable surface intervals are shown in Table 8, aspheric coefficients are shown in Table 9, and various aberration diagrams are shown in Table 10. Figure 8 .

[0504] [Table 7]

[0505] Example 3

[0506] Sn R D Nd vd θgF ED SG 1 50.0118 1.1991 1.74694 53.31 0.54634 49.893 4.189 2 20.8333 15.8836 38.443 *3 -262.3854 1.5005 1.58313 59.38 0.54237 38.002 3.050 *4 35.9120 2.2689 37.874 5 63.6396 3.5732 1.95489 23.02 0.62840 38.002 4.208 6 221.3263 DD[6] 37.600 7 35.3793 4.9475 1.68591 57.20 0.54264 32.000 3.985 8 298.6922 4.5938 31.804 *9 248.9735 2.0023 1.69304 52.93 0.54673 31.171 3.660 *10 -225.9032 5.7856 31.020 11 -140.4419 6.3220 1.43700 95.10 0.53364 31.039 3.530 12 -24.8842 1.0008 1.90218 20.17 0.64101 31.160 3.591 13 -28.8032 0.1991 31.864 14 -61.9435 2.1039 1.73734 54.27 0.54496 30.657 4.145 15 -43.4002 DD

[15] 30.663 16(St) ∞ 2.4991 22.798 17 -85.8210 0.9001 1.82454 23.77 0.62003 22.213 3.611 18 24.8538 4.3686 1.49700 81.61 0.53887 22.002 3.700 19 -226.2626 0.1999 22.240 *20 -138.8726 1.2008 1.68948 31.02 0.59874 22.267 2.880 *21 -147.5639 0.1991 22.403 22 43.6307 2.1713 1.99999 17.79 0.66021 22.791 3.948 23 111.3533 DD

[23] 22.575 *24 -53.1574 1.0009 1.49710 81.56 0.53848 19.757 3.640 *25 135.4479 DD

[25] 19.500 26 82.1018 4.1528 1.88219 39.78 0.57106 26.970 4.995 27 -43.0789 4.5414 27.000 28 -35.5532 0.9991 1.70613 29.69 0.59901 25.583 3.026 29 -219.1590 14.1919 25.986 30 ∞ 2.8500 1.51680 64.20 0.53430 28.108 2.520 31 ∞ 1.1192 28.412

[0507] [Table 8]

[0508] Example 3

[0509] Wide Middle Tele Zr 1.00 1.92 3.24 f 16.50 31.69 53.46 Bf 17.19 17.19 17.19 Fno. 2.88 2.88 2.88 2ω[°] 88.2 48.0 29.0 DD[6] 48.7103 12.9103 0.5006 DD

[15] 1.4991 6.4991 10.7433 DD

[23] 1.9991 14.3625 21.5530 DD

[25] 6.0695 4.3058 21.0115

[0510] [Table 9]

[0511] Example 3

[0512]

[0513] [Example 4]

[0514] The structure and movement trajectory of the zoom lens of Example 4 are shown in FIG. Fig. 9 . The zoom lens of Example 4 includes, from the object side to the image side, a first lens group G1 having negative power, a second lens group G2 having positive power, a third lens group G3 having positive power, a fourth lens group G4 having positive power, a fifth lens group G5 having negative power, and a sixth lens group G6 having positive power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, the fifth lens group G5, and the sixth lens group G6. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 change the intervals with the adjacent lens groups and move along the optical axis Z, and the sixth lens group G6 is fixed relative to the image plane Sim. The focusing group includes the fifth lens group G5, and when focusing from an object at infinity to the closest object, the focusing group moves toward the image side.

[0515] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes four lenses, L21 to L24, in order from the object side to the image side. The third lens group G3 includes one lens, L31. The fourth lens group G4 includes four lenses, L41 to L44, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51. The sixth lens group G6 includes two lenses, L61 to L62, in order from the object side to the image side.

[0516] Regarding the zoom lens of Example 4, basic lens data is shown in Table 10, specifications and variable surface intervals are shown in Table 11, aspheric surface coefficients are shown in Table 12, and various aberration diagrams are shown in Table 13. Fig.10 .

[0517] [Table 10]

[0518] Example 4

[0519] Sn R D Nd vd 0gF ED SG 1 44.2049 1.2991 1.69680 55.53 0.54341 39.427 3.700 2 18.1578 10.3505 31.260 *3 -204.3649 1.6005 1.61881 63.85 0.54182 31.019 3.570 *4 28.6350 2.2063 29.704 5 78.6745 2.5350 1.94595 17.98 0.65460 29.700 3.510 6 227.3937 DD[6] 29.528 7 51.8333 3.9337 1.90366 31.31 0.59481 28.460 4.510 8 -315.9962 9.5020 28.730 *9 -323.3870 2.0036 1.68948 31.02 0.59874 30.580 2.880 *10 -519.6372 0.3310 31.503 11 65.4387 7.8022 1.49700 81.61 0.53887 32.624 3.700 12 -37.0450 1.1121 1.84666 23.78 0.62054 32.609 3.540 13 -107.5732 DD

[13] 33.247 14 46.7660 5.8168 1.72916 54.68 0.54451 33.564 4.180 15 -118.3219 DD

[15] 33.130 16(St) ∞ 2.7051 21.971 17 -48.5320 1.0197 1.84666 23.78 0.62054 20.785 3.540 18 15.7573 6.8536 1.49700 81.61 0.53887 19.844 3.700 19 -37.0682 0.9573 20.178 *20 -20.0856 1.2009 1.73077 40.50 0.57149 20.173 3.220 *21 -34.2424 0.2000 20.802 22 46.1426 3.5831 1.92286 18.90 0.64960 21.526 3.580 23 -70.8871 DD

[23] 21.400 *24 114.5357 1.0232 1.80139 45.45 0.55814 17.000 4.840 *25 28.5126 DD

[25] 17.069 26 112.6342 4.5452 1.80400 46.53 0.55775 27.447 4.460 27 -46.2503 0.1997 27.800 28 56.6299 1.0007 1.48749 70.24 0.53007 27.413 2.460 29 33.3334 16.5743 26.924 30 ∞ 2.8500 1.51680 64.20 0.53430 28.129 2.520 31 ∞ 1.1102 28.294

[0520] [Table 11]

[0521] Example 4

[0522] Wide Middle Tele Zr 1.00 1.92 3.24 f 16.49 31.68 53.43 Bf 19.56 19.56 19.56 Fno. 2.88 2.88 2.88 2ω[°] 86.2 47.4 29.2 DD[6] 37.6591 11.4676 0.5010 DD

[13] 0.6772 2.2424 0.4991 DD

[15] 1.5003 6.1155 13.6986 DD

[23] 2.0007 11.4914 18.5625 DD

[25] 5.8678 10.1653 20.1607

[0523] [Table 12]

[0524] Example 4

[0525]

[0526] [Example 5]

[0527] The structure and movement trajectory of the zoom lens of Example 5 are shown in FIG. Fig.11 . The zoom lens of Example 5 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 change the intervals with the adjacent lens groups and move along the optical axis Z. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the closest object, the focusing group moves toward the image side.

[0528] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 includes four lenses, aperture stop St and lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 includes one lens, L41. The fifth lens group G5 includes one lens, LS1.

[0529] Regarding the zoom lens of Example 5, basic lens data is shown in Table 13, specifications and variable surface intervals are shown in Table 14, aspheric coefficients are shown in Table 15, and various aberration diagrams are shown in Table 16. Fig.12 .

[0530] [Table 13]

[0531] Example 5

[0532] Sn R D Nd ν d 0gF ED SG 1 42.3657 1.2000 1.69680 55.46 0.54260 39.268 3.670 2 18.2781 10.3780 31.394 *3 -232.4961 1.5000 1.59201 67.02 0.53589 31.057 3.140 *4 28.8393 2.8006 29.559 5 120.3141 2.0172 1.98613 16.48 0.66558 29.500 3.540 6 413.9655 DD[61 29.435 7 46.2679 3.9189 1.90366 31.31 0.59481 28.800 4.510 8 -855.2208 8.8424 28.983 *9 -184.1931 2.0000 1.68948 31.02 0.59874 30.356 2.880 *10 -256.5610 0.2292 31.289 11 56.0759 7.9117 1.49700 81.61 0.53887 32.283 3.700 12 -36.2870 1.0000 1.84666 23.78 0.62054 32.166 3.540 13 -91.2345 0.2009 32.603 14 42.0311 5.3024 1.72916 54.67 0.54534 32.300 4.050 15 -224.6624 DD[1al 31.726 16(St) ∞ 2.5084 21.666 17 -44.3269 0.8991 1.84666 23.78 0.62054 20.614 3.540 18 16.1266 6.6821 1.49700 81.61 0.53887 19.675 3.700 19 -36.7518 0.8636 19.958 *20 -19.8192 1.2000 1.68948 31.02 0.59874 19.945 2.880 *21 -34.2802 0.2009 20.476 22 43.1032 3.5928 1.92286 18.90 0.64960 21.109 3.580 23 -67.8003 DD[231 21.000 *24 49.3212 1.0003 1.80139 45.45 0.55814 17.000 4.840 *25 17.4008 DD[251 17.089 26 99.3998 4.9168 1.58144 40.75 0.57757 26.096 2.590 27 -36.8725 DD[271 26.500 28 ∞ 2.8500 1.51680 64.20 0.53430 28.151 2.520 29 ∞ 1.1132 28.320

[0533] [Table 14]

[0534] Example 5

[0535] Wide Midd]e Tele Zr 1.00 1.92 3.24 f 16.49 31.68 53.42 Bf 19.51 21.79 20.28 Fno. 2.88 2.88 2.88 2ω[°] 86.2 47.0 28.8 DD[6] 40.4763 11.6433 0.5888 DD

[15] 1.5009 5.2849 11.8094 DD

[23] 2.0008 10.1468 16.9040 DD

[25] 5.2676 7.3234 17.2581 DD

[27] 16.5206 18.7991 17.2842

[0536] [Table 15]

[0537] Example 5

[0538]

[0539] [Example 6]

[0540] The structure and movement trajectory of the zoom lens of Example 6 are shown in FIG. Fig.13 . The zoom lens of Example 6 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 change the intervals with the adjacent lens groups and move along the optical axis Z. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the closest object, the focusing group moves toward the image side.

[0541] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 includes four lenses, aperture stop St and lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 includes one lens, L41. The fifth lens group G5 includes one lens, L51.

[0542] Regarding the zoom lens of Example 6, basic lens data is shown in Table 16, specifications and variable surface intervals are shown in Table 17, aspheric coefficients are shown in Table 18, and various aberration diagrams are shown in Table 19. Fig.14 .

[0543] [Table 16]

[0544] Example 6

[0545] Sn R D Nd vd 0gF ED SG 1 75.0109 2.5000 1.58913 61.13 0.54067 52.780 3.310 2 24.3292 13.8799 40.717 *3 -85.7865 2.5002 1.58313 59.38 0.54237 40.127 3.050 *4 37.1614 7.7384 37.579 5 70.5617 3.5387 1.92286 20.88 0.63900 37.800 3.940 6 219.6188 DD[6] 37.567 7 41.9834 3.3656 1.92286 20.88 0.63900 34.800 3.940 8 64.8972 3.4804 34.488 *9 69.3107 7.8253 1.58313 59.38 0.54237 34.981 3.050 *10 -109.6813 0.9612 35.540 11 26.8224 7.3171 1.49700 81.61 0.53887 33.875 3.700 12 213.3920 1.0000 1.85896 22.73 0.62844 32.678 3.710 13 25.1680 2.9247 29.888 14 49.2307 5.8162 1.61800 63.33 0.54414 29.971 3.670 15 -66.9253 DD

[15] 29.794 16(St) ∞ 1.6899 15.817 17 -74.6872 0.8000 1.67270 32.17 0.59633 15.677 2.900 18 13.7898 6.1427 1.49700 81.61 0.53887 15.750 3.700 19 -28.1550 0.4579 16.225 20 -24.2695 1.0000 1.62004 36.30 0.58729 16.223 2.670 21 290.4566 0.1500 16.884 22 44.2907 3.3113 1.92286 20.88 0.63900 17.298 3.940 23 -48.1830 DD

[23] 17.368 *24 56.7843 1.0000 1.85135 40.10 0.56954 14.800 5.250 *25 22.4502 DD

[25] 14.897 *26 -82.0631 3.2467 1.85135 40.10 0.56954 25.489 5.250 *27 -32.9021 DD

[27] 26.000 28 ∞ 2.8000 1.51680 64.20 0.53430 28.078 2.520 29 ∞ 1.1000 28.276

[0546] [Table 17]

[0547] Example 6

[0548] Wide Middle Tele Zr 1.00 1.83 3.24 f 16.49 30.11 53.37 Bf 23.03 22.31 19.93 Fno. 2.89 2.89 2.89 2ω[°] 86.8 50.0 29.4 DD[6] 50.5402 16.4951 0.7998 DD

[15] 0.9998 12.0513 28.9381 DD

[23] 2.3997 3.4536 2.3994 DD

[25] 5.4193 9.3382 20.7109 DD

[27] 20.0804 19.3604 16.9813

[0549] [Table 18]

[0550] Example 6

[0551]

[0552] [Example 7]

[0553] The structure and movement trajectory of the zoom lens of Example 7 are shown in FIG. Fig.15 . The zoom lens of Example 7 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, and a fourth lens group G4 having negative optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, and the fourth lens group G4. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the closest object, the focusing group moves toward the image side.

[0554] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 includes four lenses, aperture stop St and lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 includes two lenses, L41 to L42, in order from the object side to the image side.

[0555] Regarding the zoom lens of Example 7, basic lens data is shown in Table 19, specifications and variable surface spacing are shown in Table 20, aspheric coefficients are shown in Table 21, and various aberration diagrams are shown in Table 23. Fig.16 .

[0556] [Table 19]

[0557] Example 7

[0558]

[0559]

[0560] [Table 20]

[0561] Example 7

[0562] Wide Middle Tele Zr 1.00 1.92 3.24 f 16.50 31.69 53.45 Bf 19.77 26.75 28.30 Fno. 2.88 2.88 2.88 2ω[°] 87.2 48.2 28.8 DD[6] 49.0046 16.4332 0.5009 DD

[15] 1.5000 4.0799 11.8474 DD

[23] 1.9991 6.5374 12.7435 DD

[27] 16.7798 23.7562 25.3056

[0563] [Table 21]

[0564] Example 7

[0565]

[0566] [Example 8]

[0567] The structure and movement trajectory of the zoom lens of Example 8 are shown in FIG. Fig.17 . The zoom lens of Example 8 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having positive optical power, a fifth lens group G5 having negative optical power, and a sixth lens group G6 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, the fifth lens group G5, and the sixth lens group G6. When zooming from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 change the intervals with the adjacent lens groups and move along the optical axis Z, and the sixth lens group G6 is fixed relative to the image plane Sim. When zooming from the wide-angle end to the telephoto end, the second lens group G2 and the fourth lens group G4 move along the optical axis Z with the same movement trajectory. The focusing group includes the fifth lens group G5, and when focusing from an object at infinity to a nearest object, the focusing group moves toward the image side.

[0568] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes three lenses, L21 to L23, in order from the object side to the image side. The third lens group G3 includes one lens, L31. The fourth lens group G4 includes four lenses, aperture stop St and lenses L41 to L44, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51. The sixth lens group G6 includes two lenses, L61 to L62, in order from the object side to the image side.

[0569] Regarding the zoom lens of Example 8, basic lens data is shown in Table 22, specifications and variable surface intervals are shown in Table 23, aspheric surface coefficients are shown in Table 24, and various aberration diagrams are shown in Table 25. Fig.18 .

[0570] [Table 22]

[0571] Example 8

[0572] Sn R D Nd vd 0gF ED SG 1 45.6420 1.2991 1.72916 54.68 0.54451 41.450 4.180 2 19.4042 11.3992 33.163 *3 -200.0766 1.6009 1.61881 63.85 0.54182 32.792 3.570 *4 28.3271 2.0458 31.568 5 76.5422 1.9923 1.89286 20.36 0.63944 31.600 3.610 6 178.7017 DD[6] 31.436 7 85.0222 3.9168 1.90110 27.06 0.60718 27.500 3.830 8 -149.9510 5.0304 28.147 9 71.4147 6.5890 1.49700 81.61 0.53887 31.279 3.700 10 -43.2424 1.0991 1.84666 23.78 0.62054 31.512 3.540 11 -138.2105 DD

[11] 32.280 *12 38.2314 7.1591 1.72903 54.04 0.54474 33.621 4.280 *13 -146.5404 DD

[13] 33.062 14(St) 2.4991 21.517 15 -48.5983 0.9991 1.84666 23.78 0.62054 20.575 3.540 16 17.8258 6.0764 1.49700 81.61 0.53887 19.880 3.700 17 -31.9791 0.5224 20.090 *18 -20.1600 1.2000 1.68948 31.02 0.59874 20.073 2.880 *19 -34.6768 0.2000 20.518 20 47.6744 2.7869 1.92286 18.90 0.64960 21.054 3.580 21 -82.3730 DD

[21] 21.000 *22 -362.9465 0.9991 1.73077 40.51 0.57279 16.500 3.240 *23 33.1875 DD

[23] 16.784 24 75.7142 4.7453 1.83400 37.16 0.57759 28.752 4.430 25 -52.8912 0.1991 29.000 26 47.4881 1.0006 1.80518 25.42 0.61616 28.409 3.370 27 35.7509 15.7265 27.832 28 2.8500 1.51680 64.20 0.53430 28.275 2.520 29 1.1222 28.340

[0573] [Table 23]

[0574] Example 8

[0575] Wide Middle Tele Zr 1.00 1.92 3.24 f 16.49 31.67 53.41 Bf 18.73 18.73 18.73 Fno. 2.88 2.88 2.88 2ω[°] 86.4 47.4 29.2 DD[6] 35.4790 8.9063 0.4991 DD

[11] 13.5179 7.4099 0.5002 DD

[13] 2.9205 9.0285 15.9382 DD

[21] 1.9994 13.0047 20.3576 DD

[23] 5.1990 8.1041 18.2808

[0576] [Table 24]

[0577] Example 8

[0578]

[0579] [Example 9]

[0580] The structure and movement trajectory of the zoom lens of Example 9 are shown in FIG. Fig.19 . The zoom lens of Example 9 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0581] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes four lenses, L21 to L24, in order from the object side to the image side. The third lens group G3 includes three lenses, aperture stop St and lenses L31 to L33, in order from the object side to the image side. The fourth lens group G4 includes two lenses, L41 to L42, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51.

[0582] Regarding the zoom lens of Example 9, basic lens data is shown in Table 25, specifications and variable surface intervals are shown in Table 26, aspheric coefficients are shown in Table 27, and various aberration diagrams are shown in Table 28. Fig. 20 .

[0583] [Table 25]

[0584] Example 9

[0585] Sn R D Nd ν d θgF ED SG *1 84.9210 1.3502 1.83441 37.28 0.57732 45.273 4.390 *2 22.4639 12.4456 36.750 3 -56.6794 1.2010 1.52841 76.45 0.53954 36.379 3.760 4 59.6247 0.2009 35.993 5 50.1082 4.5337 1.92119 23.96 0.62025 36.200 3.840 6 406.8010 DD[6] 35.943 *7 36.3922 3.8600 1.75501 51.16 0.54856 29.000 4.410 *8 78.7565 3.9071 29.219 9 74.5198 3.6369 1.61340 44.27 0.56340 30.191 2.930 10 -158.1899 4.7657 30.161 11 83.6788 1.0000 1.77047 29.74 0.59514 29.126 3.340 12 21.1015 8.9950 1.53775 74.70 0.53936 27.928 3.640 13 -58.0141 DD

[13] 27.887 14(St) ∞ 1.4995 21.149 15 -199.6195 8.1507 1.49700 81.61 0.53887 20.779 3.700 16 -16.5654 0.7992 1.72047 34.71 0.58350 20.050 3.190 17 125.4603 1.2263 20.561 18 65.1953 3.6142 1.91082 35.25 0.58224 21.084 4.970 19 -42.6676 DD

[19] 21.091 20 -160.9403 1.8456 1.94595 17.98 0.65460 15.253 3.510 21 -38.7462 2.8451 15.000 *22 -39.9289 1.0010 1.68948 31.02 0.59874 14.829 2.880 *23 18.2865 DD

[23] 15.481 *24 63.3337 5.6529 1.49710 81.56 0.53848 27.000 3.640 *25 -33.8988 12.3559 27.157 26 ∞ 2.8500 1.51680 64.20 0.53430 28.187 2.520 27 ∞ 1.1089 28.329

[0586] [Table 26]

[0587] Example 9

[0588] Wide Middle Tele Zr 1.00 1.92 3.24 f 16.49 31.67 53.42 Bf 15.34 15.34 15.34 Fno. 2.88 2.88 2.88 2ω[°] 85.8 47.0 28.8 DD[6] 50.7939 16.1285 0.5010 DD

[13] 1.0005 10.4486 20.4249 DD

[19] 2.0009 5.4368 10.9124 DD

[23] 4.3210 8.7485 17.4280

[0589] [Table 27]

[0590] Example 9

[0591]

[0592] [Example 10]

[0593] The structure and movement trajectory of the zoom lens of Example 10 are shown in FIG. Figure 21 . The zoom lens of Example 10 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, and a fourth lens group G4 having negative optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, and the fourth lens group G4. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the closest object, the focusing group moves toward the image side.

[0594] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 includes four lenses, aperture stop St and lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 includes two lenses, L41 to L42, in order from the object side to the image side.

[0595] Regarding the zoom lens of Example 10, basic lens data is shown in Table 28, specifications and variable surface intervals are shown in Table 29, aspheric coefficients are shown in Table 30, and various aberration diagrams are shown in Table 31. Figure 22 .

[0596] [Table 28]

[0597] Example 10

[0598] Sn R D Yes etc. θgF ED SG 1 44.9189 1.3005 1.62041 60.29 0.54266 35.764 3.590 2 16.1045 8.7399 27.188 *3 -242.7817 1.6008 1.59201 67.02 0.53589 27.403 3.140 *4 27.9435 1.9730 25.613 5 52.0966 2.1023 1.94595 17.18 0.65460 25.500 3.510 6 70.2271 DD[6] 25.066 7 37.8872 3.5908 1.80518 25.42 0.61616 21.000 3.370 8 507.2094 6.3357 21.162 *9 690.5370 2.8065 1.51633 64.06 0.53345 22.053 2.380 *10 -94.2104 0.2000 22.783 11 76.8191 5.1665 1.49700 81.61 0.53887 22.861 3.700 12 -31.7482 1.1008 1.84666 23.18 0.62054 22.682 3.540 13 -111.7634 0.2008 22.888 14 34.0591 4.9780 1.60300 65.44 0.54022 22.811 3.510 15 -50.9927 DD

[15] 22.312 16(Wed) ∞ 2.5008 16.736 17 -26.4688 1.0008 1.84666 23.78 0.62054 15.868 3.540 18 20.6228 4.8583 1.49700 81.61 0.53887 15.718 3.700 19 -26.4609 0.2405 16.021 *20 -21.4498 1.1994 1.68948 31.02 0.59874 16.000 2.880 *21 -46.3457 0.2009 16.340 22 44.4462 3.4168 1.92286 18.90 0.64960 16.693 3.580 23 -38.4475 DD

[23] 16.600 *24 -17.5972 1.5547 1.85135 40.10 0.56954 14.500 5.250 *25 -53.6969 4.0374 14.687 26 24.5098 2.5209 1.58913 61.13 0.54067 19.174 3.310 27 46.6225 DD

[27] 19.382 28 ∞ 2.8500 1.51680 64.20 0.53430 27.106 2.520 29 ∞ 1.1101 27.922

[0599] [Table 29]

[0600] Example 10

[0601] Goodbye Middle TV Zr 1.00 1.48 2.20 f 16.48 24.39 36.26 Bf 19.69 22.49 21.75 Phone number. 2.88 2.88 2.88 2ω[°] 87.2 61.2 41.4 DD[6] 29.2786 13.5848 1.8766 DD

[15] 1.5009 2.5372 6.1030 DD

[23] 2.0000 5.4143 11.1288 DD

[27] 16.6995 19.5058 18.7638

[0602] [Table 30]

[0603] Example 10

[0604]

[0605] [Example 11]

[0606] The structure and movement trajectory of the zoom lens of Example 11 are shown in FIG. Figure 23. The zoom lens of Example 11 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0607] The first lens group G1 includes three lenses, L11 to L13, in order from the object side to the image side. The second lens group G2 includes four lenses, L21 to L24, in order from the object side to the image side. The third lens group G3 includes three lenses, aperture stop St and lenses L31 to L33, in order from the object side to the image side. The fourth lens group G4 includes two lenses, L41 to L42, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51.

[0608] Regarding the zoom lens of Example 11, basic lens data is shown in Table 31, specifications and variable surface intervals are shown in Table 32, aspheric coefficients are shown in Table 33, and various aberration diagrams are shown in Table 34. Figure 24 .

[0609] [Table 31]

[0610] Embodiment 11

[0611] Sn R D Yes ν d θgF ED SG *1 74.1335 1.3500 1.80139 45.45 0.55814 45.989 4.840 *2 22.4124 12.4424 37.027 3 -61.1004 1.2009 1.55397 71.76 0.53931 36.688 3.660 4 61.3891 0.2010 36.028 5 49.8249 4.1855 1.92119 23.96 0.62025 36.200 3.840 6 238.1927 DD[6] 35.916 *7 35.5105 3.6385 1.77250 49.46 0.55399 26.000 4.830 *8 79.5093 0.6184 25.947 9 66.4074 4.3505 1.51742 52.43 0.55649 26.079 2.460 10 -155.5420 4.7423 25.972 11 79.1359 2.4713 1.80000 29.84 0.60178 25.017 3.680 12 21.6607 7.1066 1.52841 76.45 0.53954 23.873 3.760 13 -58.9525 OD

[13] 23.784 14(Wed) ∞ 1.5000 17.952 15 -292.0870 6.0403 1.49700 81.61 0.53887 17.505 3.700 16 -16.0405 0.8000 1.72047 34.71 0.58350 16.802 3.190 17 122.1986 2.6779 16.872 18 70.3242 2.8154 1.91082 35.25 0.58224 17.267 4.970 19 -42.9711 00119] 17.200 20 -349.7099 2.2263 1.94595 17.98 0.65460 15.222 3.510 21 -40.1093 2.8378 15.000 *22 -38.1846 1.2434 1.68948 31.02 0.59874 14.726 2.880 *23 18.4341 00

[23] 15.353 *24 111.1338 6.0552 1.49710 81.56 0.53848 27.000 3.640 *25 -30.5093 12.8796 27.220 26 ∞ 2.8500 1.51680 64.20 0.53430 28.197 2.520 27 ∞ 1.1106 28.325

[0612] [Table 32]

[0613] Embodiment 11

[0614] Goodbye Middle TV Zr 1.00 1.92 4.00 f 16.49 31.68 65.97 Bf 15.87 15.87 15.87 Phone number. 2.88 2.88 4.01 2ω[°] 86.6 47.0 23.2 DD[6] 55.1296 22.4692 0.5006 DD

[13] 0.9998 10.3396 25.4443 DD

[19] 2.0000 3.7338 12.6001 DD

[23] 4.2086 11.2910 23.5528

[0615] [Table 33] Example 11

[0616]

[0617] [Example 12]

[0618] The structure and movement trajectory of the zoom lens of Example 12 are shown in FIG. Figure 25. The zoom lens of Example 12 includes, from the object side to the image side, a first lens group G1 having negative power, a second lens group G2 having negative power, a third lens group G3 having positive power, a fourth lens group G4 having positive power, a fifth lens group G5 having negative power, and a sixth lens group G6 having positive power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, the fifth lens group G5, and the sixth lens group G6. When changing the power from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 change the intervals with the adjacent lens groups and move along the optical axis Z, and the sixth lens group G6 is fixed relative to the image plane Sim. The focusing group includes the fifth lens group G5, and when focusing from an object at infinity to the closest object, the focusing group moves toward the image side.

[0619] The first lens group G1 includes two lenses, L11 to L12, in order from the object side to the image side. The second lens group G2 includes two lenses, L21 to L22, in order from the object side to the image side. The third lens group G3 includes three lenses, L31 to L33, in order from the object side to the image side. The fourth lens group G4 includes three lenses, aperture stop St and lenses L41 to L43, in order from the object side to the image side. The fifth lens group G5 includes two lenses, L51 to L52, in order from the object side to the image side. The sixth lens group G6 includes one lens, L61.

[0620] Regarding the zoom lens of Example 12, basic lens data is shown in Table 34, specifications and variable surface intervals are shown in Table 35, aspheric coefficients are shown in Table 36, and various aberration diagrams are shown in Table 37. Figure 26 .

[0621] [Table 34]

[0622] Example 12

[0623] Sn R D Yes etc. θgF ED SG 1 57.2824 1.3500 1.85026 32.27 0.59299 46.529 4.360 2 22.5543 8.4338 37.633 *3 50.3879 2.0002 1.49710 81.56 0.53848 37.605 3.640 *4 32.3426 DD[4] 36.620 5 -63.0524 1.1092 1.48749 70.44 0.53062 35.338 2.450 6 41.5164 4.6300 1.92119 23.96 0.62025 34.954 3.840 7 221.9927 DD[7] 34.600 *8 44.1459 4.7421 1.77377 47.17 0.55574 30.300 4.620 *9 -260.6536 10.1775 30.323 10 78.5095 0.9999 1.80518 25.42 0.61616 30.077 3.370 11 25.6794 8.9001 1.53775 74.70 0.53936 29.316 3.640 12 -47.5253 DD

[12] 29.361 13(Wed) ∞ 1.5009 21.983 14 -216.6118 9.1516 1.49700 81.61 0.53887 21.580 3.700 15 -17.5080 0.8002 1.72047 34.71 0.58350 20.503 3.190 16 102.0648 1.1712 20.902 17 66.2893 3.6049 1.90525 35.04 0.58486 21.354 4.830 18 -44.9451 DD

[18] 21.353 19 -139.5377 1.8818 1.94595 17.98 0.65460 15.442 3.510 20 -38.7363 2.4217 15.200 *21 -31.8393 1.0002 1.68948 31.02 0.59874 15.093 2.880 *22 24.2614 DD

[22] 15.689 *23 78.6536 6.6065 1.49710 81.56 0.53848 27.000 3.640 *24 -31.3513 13.2386 27.287 25 ∞ 2.8500 1.51680 64.20 0.53430 28.233 2.520 26 ∞ 1.1085 28.364

[0624] [Table 35]

[0625] Example 12

[0626] Goodbye Middle TV Zr 1.00 1.92 3.24 f 16.48 31.67 53.41 Bf 16.22 16.22 16.22 Phone number. 2.88 2.88 2.88 2ω[°] 86.6 47.0 28.6 DD[4] 8.8545 7.8019 7.2878 DD[7] 46.5832 14.8442 0.5000 DD

[12] 0.9991 9.9713 20.2186 DD

[18] 2.0005 5.7734 11.5198 DD

[22] 4.3476 9.8586 19.0563

[0627] [Table 36]

[0628] Example 12

[0629]

[0630] [Example 13]

[0631] The structure and movement trajectory of the zoom lens of Example 13 are shown in FIG. Figure 27 . The zoom lens of Example 13 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having negative optical power, and a fourth lens group G4 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, and the fourth lens group G4. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, and the third lens group G3 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fourth lens group G4 is fixed relative to the image plane Sim. The focusing group includes the third lens group G3, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0632] The first lens group G1 includes three lenses L11 to L13 in order from the object side to the image side. The second lens group G2 includes an aperture stop St and six lenses L21 to L26. The third lens group G3 includes one lens L31. The fourth lens group G4 includes one lens L41.

[0633] Regarding the zoom lens of Example 13, basic lens data is shown in Table 37, specifications and variable surface intervals are shown in Table 38, aspheric coefficients are shown in Table 39, and various aberration diagrams are shown in Table 37. Figure 28 .

[0634] [Table 37]

[0635] Example 13

[0636] Sn R D Yes ν d θgF ED SG 1 38.8652 1.0000 1.80420 46.50 0.55727 29.585 4.400 2 13.7071 8.1875 23.339 *3 -50.4909 1.3002 1.49710 81.56 0.53848 23.196 3.640 *4 47.3989 0.8458 22.927 5 34.2385 2.4861 2.00100 29.13 0.59952 22.897 5.120 6 107.0749 DD[61 22.614 7 18.0001 2.7297 1.49700 81.61 0.53887 15.144 3.700 8 209.4027 0.1302 15.041 9 21.8096 2.6596 1.49700 81.61 0.53887 14.918 3.700 10 -236.6385 0.8101 1.56732 42.84 0.57436 14.557 2.530 11 48.3335 2.0351 14.170 12(Wed) ∞ 3.3415 13.784 13 18.3311 3.6675 1.55032 75.50 0.54001 12.647 4.090 14 -17.5274 0.5999 1.58144 40.89 0.57680 12.027 2.590 15 21.2788 1.2818 11.084 *16 38.1862 1.1865 1.77288 49.52 0.55481 10.828 4.930 *17 116.2065 DDtl71 11.070 *18 -45.4047 0.8001 1.77288 49.52 0.55481 13.644 4.930 *19 57.2450 DD[191 14.044 20 -778.7128 3.2673 1.73400 51.05 0.55010 25.699 4.060 21 -38.7256 10.9905 26.118 22 ∞ 2.8500 1.51680 64.20 0.53430 27.996 2.520 23 ∞ 1.1146 28.262

[0637] [Table 38]

[0638] Example 13

[0639] Goodbye Middle TV Zr 1.00 1.91 2.94 f 16.49 31.51 48.53 Bf 13.98 13.98 13.98 Phone number. 2.88 3.76 4.94 2ω[°] 88.2 48.0 32.0 DD[6] 27.2120 8.0843 0.4771 DD

[17] 2.4145 6.3926 10.2612 DD

[19] 6.5817 15.0508 23.7355

[0640] [Table 39]

[0641] Example 13

[0642]

[0643] [Example 14]

[0644] The structure and movement trajectory of the zoom lens of Example 14 are shown in FIG. Figure 29. The zoom lens of Example 14 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having negative optical power, and a fourth lens group G4 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, and the fourth lens group G4. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, and the third lens group G3 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fourth lens group G4 is fixed relative to the image plane Sim. The focusing group includes the third lens group G3, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0645] The first lens group G1 includes three lenses L11 to L13 in order from the object side to the image side. The second lens group G2 includes an aperture stop St and six lenses L21 to L26. The third lens group G3 includes one lens L31. The fourth lens group G4 includes one lens L41.

[0646] Regarding the zoom lens of Example 14, basic lens data is shown in Table 40, specifications and variable surface intervals are shown in Table 41, aspheric coefficients are shown in Table 42, and various aberration diagrams are shown in Table 43. Figure 30 .

[0647] [Table 40]

[0648] Embodiment 14

[0649] Sn R D Yes etc. θgF ED SG 1 38.1700 1.0000 1.83481 42.72 0.56477 29.098 4.570 2 13.1570 8.5608 23.126 *3 -47.6220 1.3003 1.49710 81.56 0.53848 22.799 3.640 *4 51.5677 0.5908 22.572 5 36.2334 2.5729 2.05090 26.94 0.60519 22.542 5.270 6 118.7423 DD[6] 22.229 7 18.0000 2.7577 1.49700 81.61 0.53887 15.263 3.700 8 206.6777 0.1337 15.157 9 21.5915 2.7621 1.49700 81.61 0.53887 15.037 3.700 10 -162.3215 0.8102 1.54814 45.82 0.57004 14.671 2.540 11 52.1854 1.9904 14.260 12(Wed) ∞ 3.0222 13.837 13 18.9347 3.6886 1.55032 75.50 0.54001 12.682 4.090 14 -16.9770 0.6000 1.59551 39.22 0.58042 12.041 2.620 15 23.5847 1.1297 11.118 *16 41.4700 1.1176 1.77400 49.59 0.55480 10.854 4.930 *17 101.2537 DD

[17] 11.019 *18 -40.5051 1.1560 1.77400 49.59 0.55480 13.841 4.930 *19 66.3377 DD

[19] 14.319 20 -500.4725 3.2335 1.77250 49.62 0.55038 25.578 4.280 21 -38.0008 10.9718 26.014 22 ∞ 2.8500 1.51680 64.20 0.53430 27.981 2.520 23 ∞ 1.0132 28.259

[0650] [Table 41]

[0651] Embodiment 14

[0652] Goodbye Middle TV Zr 1.00 1.91 2.94 f 16.50 31.53 48.55 Bf 13.86 13.86 13.86 Phone number. 2.88 3.76 4.94 2ω[°] 88.2 47.8 31.8 DD[6] 27.0503 8.0678 0.4809 DD

[17] 2.5767 6.8722 11.1504 DD

[19] 6.6113 14.5578 22.5018

[0653] [Table 42]

[0654] Embodiment 14

[0655]

[0656] [Example 15]

[0657] The structure and movement trajectory of the zoom lens of Example 15 are shown in FIG. Figure 31. The zoom lens of Example 15 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having negative optical power, and a fourth lens group G4 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, and the fourth lens group G4. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, and the third lens group G3 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fourth lens group G4 is fixed relative to the image plane Sim. The focusing group includes the third lens group G3, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0658] The first lens group G1 includes three lenses L11 to L13 in order from the object side to the image side. The second lens group G2 includes an aperture stop St and six lenses L21 to L26. The third lens group G3 includes one lens L31. The fourth lens group G4 includes one lens L41.

[0659] Regarding the zoom lens of Example 15, basic lens data is shown in Table 43, specifications and variable surface intervals are shown in Table 44, aspheric coefficients are shown in Table 45, and various aberration diagrams are shown in Table 46. Figure 32 .

[0660] [Table 43]

[0661] Embodiment 15

[0662] Sn R D Yes etc. θgF ED SG 1 30.3762 1.0000 1.87070 40.73 0.56825 29.827 4.840 2 13.4392 8.8997 23.620 *3 1147.0813 1.3564 1.49710 81.56 0.53848 23.377 3.640 *4 23.7952 0.1200 23.286 5 35.0875 2.6490 2.00069 25.46 0.61364 23.261 4.730 6 115.2400 DD[6] 22.946 7 18.9639 2.3985 1.49700 81.61 0.53887 14.481 3.700 8 76.3584 2.0746 14.396 9(Wed) ∞ 1.0000 14.397 10 19.2520 3.6026 1.55032 75.50 0.54001 14.468 4.090 11 -30.9153 0.8002 1.51742 52.15 0.55896 14.105 2.430 12 74.1706 0.8144 13.565 13 16.1585 3.9478 1.55032 75.50 0.54001 12.952 4.090 14 -34.0719 0.6001 1.67300 38.26 0.57580 11.893 3.010 15 14.6477 0.3625 10.930 *16 28.9884 1.2619 1.80337 45.49 0.55928 10.928 4.890 *17 107.3529 DD

[17] 10.519 *18 -33.7971 1.1605 1.77400 49.59 0.55480 12.559 4.930 *19 92.6500 DD

[19] 12.826 20 -248.6833 3.4244 1.72916 54.67 0.54534 25.490 4.050 21 -33.1152 12.6900 25.962 22 ∞ 2.8500 1.51680 64.20 0.53430 28.020 2.520 23 ∞ 1.0094 28.272

[0663] [Table 44]

[0664] Embodiment 15

[0665] Goodbye Middle TV Zr 1.00 1.91 2.94 f 16.49 31.52 48.54 Bf 15.58 15.58 15.58 Phone number. 2.88 3.75 4.94 2ω[°] 87.6 47.4 31.8 DD[6] 26.8760 7.6081 0.4236 DD

[17] 2.7199 7.2373 10.9618 DD

[19] 5.8706 12.9179 21.8201

[0666] [Table 45]

[0667] Embodiment 15

[0668]

[0669] [Example 16]

[0670] The structure and movement trajectory of the zoom lens of Example 16 are shown in FIG. Figure 33. The zoom lens of Example 16 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having negative optical power, and a fourth lens group G4 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, and the fourth lens group G4. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, and the third lens group G3 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fourth lens group G4 is fixed relative to the image plane Sim. The focusing group includes the third lens group G3, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0671] The first lens group G1 includes three lenses L11 to L13 in order from the object side to the image side. The second lens group G2 includes an aperture stop St and six lenses L21 to L26. The third lens group G3 includes one lens L31. The fourth lens group G4 includes one lens L41.

[0672] Regarding the zoom lens of Example 16, basic lens data is shown in Table 46, specifications and variable surface intervals are shown in Table 47, aspheric coefficients are shown in Table 48, and various aberration diagrams are shown in Table 49. Figure 34 .

[0673] [Table 46]

[0674] Example 16

[0675]

[0676] Sn R D Yes etc. θ gF ED SG 1 37.4233 1.0000 1.77535 50.31 0.55042 30.158 4.350 2 13.7828 8.6595 23.717 *3 -70.2026 1.6002 1.58313 59.46 0.54056 23.386 3.010 *4 42.5822 0.1201 22.990 5 31.3942 2.6537 2.05091 26.95 0.60473 22.986 5.270 6 81.0448 DD[6] 22.614 7 17.7377 2.2567 1.49700 81.61 0.53887 14.503 3.700 8 57.3270 2.0158 14.406 9(Wed) ∞ 1.0000 14.411 10 22.6785 2.8818 1.59282 68.62 0.54414 14.493 4.130 11 -54.8197 0.7100 1.54814 45.82 0.56889 14.217 2.580 12 89.3038 0.1200 13.872 13 16.8525 4.1033 1.59282 68.62 0.54414 13.512 4.130 14 -23.9764 0.6001 1.65410 39.54 0.57251 12.593 3.010 15 16.1533 1.2160 11.485 *16 34.9309 1.9998 1.58313 59.46 0.54056 11.330 3.010 *17 299.9766 DD

[17] 10.813 *18 -26.7737 1.1708 1.72903 54.04 0.54474 12.551 4.280 *19 228.9390 DD

[19] 12.781 20 -787.5447 4.0045 1.60738 56.71 0.54817 25.555 3.530 21 -29.8498 11.9222 26.045 22 ∞ 2.8500 1.51680 64.20 0.53430 28.029 2.520 23 ∞ 1.0137 28.279

[0677] [Table 47]

[0678] Example 16

[0679] Goodbye Middle TV Zr 1.00 1.91 2.94 f 16.49 31.51 48.53 Bf 14.81 14.81 14.81 Phone number. 2.88 3.79 4.94 2ω[°] 88.4 47.6 31.8 DD[6] 26.6792 7.9314 0.3446 DD

[17] 3.3445 7.9082 12.7100 DD

[19] 5.5720 13.0405 20.0025

[0680] [Table 48]

[0681] Example 16

[0682]

[0683] [Example 17]

[0684] The structure and movement trajectory of the zoom lens of Example 17 are shown in FIG. Figure 35. The zoom lens of Example 17 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having negative optical power, and a fourth lens group G4 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, and the fourth lens group G4. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, and the third lens group G3 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fourth lens group G4 is fixed relative to the image plane Sim. The focusing group includes the third lens group G3, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0685] The first lens group G1 includes three lenses L11 to L13 in order from the object side to the image side. The second lens group G2 includes an aperture stop St and six lenses L21 to L26. The third lens group G3 includes one lens L31. The fourth lens group G4 includes one lens L41.

[0686] Regarding the zoom lens of Example 17, basic lens data is shown in Table 49, specifications and variable surface intervals are shown in Table 50, aspheric coefficients are shown in Table 51, and various aberration diagrams are shown in Table 52. Figure 36 .

[0687] [Table 49]

[0688] Embodiment 17

[0689] Sn R D Yes ν d θgF ED SG 1 34.7628 1.0000 1.77250 49.60 0.55165 30.011 4.240 2 13.5266 8.7100 23.546 *3 -82.8134 1.6000 1.58510 58.74 0.54116 23.192 3.300 *4 36.3271 0.1200 22.740 5 30.2168 2.6300 2.05091 26.95 0.60473 22.987 5.270 6 76.4413 DD[6] 22.623 7 16.3962 2.4600 1.49700 81.61 0.53887 14.628 3.700 8 46.5774 2.1100 14.445 9(Wed) ∞ 1.0000 14.360 10 20.4640 3.0800 1.59283 68.63 0.54286 14.412 4.070 11 -58.8570 0.5700 1.54814 45.82 0.56889 14.060 2.580 12 58.8570 0.2000 13.675 13 17.4835 4.1100 1.59283 68.63 0.54286 13.338 4.070 14 -24.0337 0.5400 1.65411 39.68 0.57262 12.369 3.010 15 15.9153 0.6300 11.301 *16 29.1113 1.8900 1.58510 58.74 0.54116 11.262 3.300 *17 294.8208 DD

[17] 10.816 *18 -27.2175 1.1700 1.76802 49.24 0.55164 12.645 4.560 *19 241.5555 DD

[19] 12.921 20 -751.9980 4.2200 1.61773 49.81 0.55968 25.200 3.160 21 -30.5006 12.0688 25.835 22 ∞ 2.8500 1.51680 64.20 0.53430 28.000 2.520 23 ∞ 1.0100 28.272

[0690] [Table 50]

[0691] Embodiment 17

[0692] Goodbye Middle TV Zr 1.00 1.91 2.94 f 16.49 31.51 48.57 Bf 14.96 14.92 14.86 Phone number. 2.88 3.75 4.94 2ω[°] 88.4 47.6 31.8 DD[6] 26.6200 7.7138 0.4879 DD

[17] 3.2870 7.9979 12.2130 DD

[19] 5.6000 12.4484 20.4650

[0693] [Table 51]

[0694] Embodiment 17

[0695]

[0696] [Example 18]

[0697] The structure and movement trajectory of the zoom lens of Example 18 are shown in FIG. Figure 37. The zoom lens of Example 18 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0698] The first lens group G1 includes four lenses, L11 to L14, in order from the object side to the image side. The second lens group G2 includes three lenses, L21 to L23, in order from the object side to the image side. The third lens group G3 includes five lenses, aperture stop St and lenses L31 to L35, in order from the object side to the image side. The fourth lens group G4 includes three lenses, L41 to L43, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51.

[0699] Regarding the zoom lens of Example 18, basic lens data is shown in Table 52, specifications and variable surface intervals are shown in Table 53, aspheric coefficients are shown in Table 54, and various aberration diagrams are shown in Table 55. Figure 38 .

[0700] [Table 52]

[0701] Embodiment 18

[0702] Sn R D Yes etc. θgF ED SG *1 78.1195 2.4207 1.59319 67.90 0.54402 35.472 4.100 *2 17.0643 3.0293 26.514 3 24.7411 0.8212 1.88300 40.80 0.56557 26.186 5.420 4 14.7059 10.6799 22.860 5 -78.5968 0.6558 1.43744 94.44 0.53349 20.200 3.520 6 20.1971 3.7151 1.88300 40.76 0.56679 20.154 5.520 7 83.7799 DD[7] 19.716 *8 39.7450 3.0244 1.90525 35.04 0.58486 17.400 4.830 *9 -57.3438 0.1498 17.400 10 -65.6066 0.5577 1.64769 33.87 0.59124 17.165 2.780 11 55.2063 1.9917 1.52855 76.97 0.54015 16.872 3.855 12 6548.5015 DD

[12] 16.674 13(Wed) ∞ 0.9998 16.337 14 -7038.8276 0.5436 1.61405 55.12 0.55186 16.324 3.580 15 54.7869 3.0150 1.49690 81.52 0.53599 16.320 3.640 16 -39.3414 2.0952 16.349 17 -288.1666 0.5186 1.65411 39.68 0.57262 15.823 3.010 18 11.5283 4.5098 1.49731 82.51 0.53861 15.499 3.860 19 53.9303 0.5134 15.689 *20 16.4423 6.0793 1.49710 81.56 0.53848 16.200 3.640 *21 -14.7991 DD

[21] 16.200 *22 34.3725 0.8315 1.68948 31.02 0.59874 14.600 2.880 *23 14.2554 2.0074 14.522 24 184.6966 0.5228 1.90200 25.26 0.61662 14.818 4.100 25 15.1694 3.3643 1.92286 18.90 0.65041 15.642 3.570 26 51.9007 DD

[26] 16.195 27 -921.0004 3.2845 1.49700 81.54 0.53748 23.829 3.620 28 -40.4013 9.9772 24.400 29 ∞ 2.8500 1.51680 64.20 0.53430 28.693 2.520 30 ∞ 1.1000 29.400

[0703] [Table 53]

[0704] Embodiment 18

[0705] Goodbye Middle TV Zr 1.00 1.38 1.88 f 13.39 18.53 25.22 Bf 12.96 12.96 12.96 Phone number. 2.88 2.88 2.88 2ω[°] 100.2 77.4 60.0 DD[7] 18.1081 7.5851 1.4820 DD

[12] 1.6890 1.9913 1.5049 DD

[21] 1.7799 2.0870 1.7441 DD

[26] 3.2403 8.6551 17.8642

[0706] [Table 54]

[0707] Embodiment 18

[0708]

[0709] [Example 19]

[0710] The structure and movement trajectory of the zoom lens of Example 19 are shown in FIG. Figure 39. The zoom lens of Example 19 includes, from the object side to the image side, a first lens group G1 having negative optical power, a second lens group G2 having positive optical power, a third lens group G3 having positive optical power, a fourth lens group G4 having negative optical power, and a fifth lens group G5 having positive optical power. The subsequent group GR includes the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. When changing the magnification from the wide-angle end to the telephoto end, the first lens group G1, the second lens group G2, the third lens group G3, and the fourth lens group G4 change the intervals with the adjacent lens groups and move along the optical axis Z, and the fifth lens group G5 is fixed relative to the image plane Sim. The focusing group includes the fourth lens group G4, and when focusing from an object at infinity to the nearest object, the focusing group moves toward the image side.

[0711] The first lens group G1 includes four lenses, L11 to L14, in order from the object side to the image side. The second lens group G2 includes three lenses, L21 to L23, in order from the object side to the image side. The third lens group G3 includes five lenses, aperture stop St and lenses L31 to L35, in order from the object side to the image side. The fourth lens group G4 includes three lenses, L41 to L43, in order from the object side to the image side. The fifth lens group G5 includes one lens, L51.

[0712] Regarding the zoom lens of Example 19, basic lens data is shown in Table 55, specifications and variable surface intervals are shown in Table 56, aspheric coefficients are shown in Table 57, and various aberration diagrams are shown in Table 58. Figure 40 .

[0713] [Table 55]

[0714] Embodiment 19

[0715] Sn R D Yes etc. θgF ED SG *1 102.4841 3.2122 1.51633 64.06 0.53345 47.744 2.380 *2 27.1902 2.5481 37.859 3 35.2828 1.9656 1.71300 53.94 0.54424 36.887 3.810 4 15.6713 13.3768 27.918 5 -44.6411 0.8130 1.49700 81.61 0.53894 25.600 3.900 6 23.8830 3.8673 1.95000 29.37 0.60018 24.984 4.790 7 62.7729 DD[7] 24.445 *8 32.7542 2.8655 1.74950 35.33 0.58189 21.200 3.290 *9 160.3926 1.1676 21.200 10 -51.7804 0.6861 1.80906 25.27 0.61209 21.205 5.200 11 510.1161 2.2875 1.49700 81.64 0.53714 21.582 3.650 12 -74.8604 DD

[12] 21.919 13(Wed) ∞ 0.9998 22.437 14 68.3551 5.9304 1.62604 39.07 0.58113 23.209 2.960 15 -24.1651 0.7511 1.80501 39.59 0.57129 23.396 4.130 16 -42.6858 2.9061 23.801 17 28.6751 6.2713 1.49700 81.35 0.53698 23.064 3.600 18 -35.8451 0.7088 1.85026 32.30 0.59311 22.360 4.220 19 30.4054 0.1498 21.724 *20 18.0338 7.8855 1.49710 81.56 0.53848 22.200 3.640 *21 -21.5341 DD

[21] 22.149 *22 39.8936 0.8590 1.68948 31.02 0.59874 15.146 2.880 *23 18.1992 1.6225 14.244 24 52.7268 0.4855 1.91650 31.60 0.59117 14.000 4.740 25 15.9194 2.4855 1.94595 17.99 0.65565 14.348 3.530 26 34.4288 DD

[26] 14.630 27 101.4093 2.8555 1.48071 85.29 0.53623 24.081 3.680 28 -106.5896 14.5177 24.400 29 ∞ 2.8500 1.51680 64.20 0.53430 28.788 2.520 30 ∞ 1.1000 29.321

[0716] [Table 56]

[0717] Embodiment 19

[0718] Goodbye Middle TV Zr 1.00 1.56 2.39 f 13.39 20.94 32.01 Bf 17.50 17.50 17.50 Phone number. 2.88 2.88 2.89 2ω[°] 102.0 71.6 48.8 DD[7] 20.8527 9.9962 1.5729 DD

[12] 8.4631 4.5312 1.4999 DD

[21] 1.9578 2.6030 6.1042 DD

[26] 3.5427 14.1294 22.0369

[0719] [Table 57]

[0720] Embodiment 19

[0721]

[0722] Tables 58 to 65 show the corresponding values ​​of conditional expressions (1) to (53) of the zoom lenses of Examples 1 to 19. The corresponding values ​​of the conditional expressions may take multiple values, but only one value is shown representatively in Tables 58 to 65. The corresponding values ​​of the embodiments shown in Tables 58 to 65 may be used as the upper limit or lower limit of the conditional expressions to set the preferred range of the conditional expressions.

[0723] [Table 58]

[0724]

[0725] [Table 59]

[0726]

[0727] [Table 60]

[0728]

[0729] [Table 61]

[0730]

[0731] [Table 62]

[0732]

[0733] [Table 63]

[0734]

[0735] [Table 64]

[0736]

[0737] [Table 65]

[0738]

[0739] Next, an imaging device according to an embodiment of the present invention will be described. Figure 41 and Figure 42 2 shows an external view of a camera 30 as an imaging device according to an embodiment of the present invention. Figure 41 1 is a perspective view showing the camera 30 as viewed from the front side. Figure 42 The camera 30 is a perspective view viewed from the back. The camera 30 is a so-called mirrorless digital camera, and can detachably mount an interchangeable lens 20. The interchangeable lens 20 includes the zoom lens 1 according to one embodiment of the present invention housed in a lens barrel.

[0740] The camera 30 includes a camera body 31, and a shutter button 32 and a power button 33 are provided on the upper surface of the camera body 31. In addition, an operation unit 34, an operation unit 35, and a display unit 36 ​​are provided on the back surface of the camera body 31. The display unit 36 ​​can display the captured image and the image existing in the angle of view before the capture.

[0741] A photographing opening for incident light from a photographic subject is provided at the center of the front surface of the camera body 31 , and a card 37 is provided at a position corresponding to the photographing opening. The interchangeable lens 20 is mounted on the camera body 31 via the card 37 .

[0742] An imaging element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) that outputs an imaging signal corresponding to an image of a subject formed by the interchangeable lens 20, a signal processing circuit that processes the imaging signal output from the imaging element to generate an image, and a recording medium for recording the generated image are provided in the camera body 31. In the camera 30, a still image or a moving image can be captured by pressing a shutter button 32, and the image data obtained by the capturing is recorded in the above-mentioned recording medium.

[0743] The above embodiments and examples are used to illustrate the technology of the present invention, but the technology of the present invention is not limited to the above embodiments and examples, and various modifications are possible. For example, the radius of curvature, surface spacing, refractive index, Abbe number and aspheric coefficient of each lens are not limited to the values ​​shown in the above embodiments, and other values ​​can be used.

[0744] Furthermore, the imaging device according to the embodiment of the present invention is not limited to the above-mentioned example, and may be in various forms such as a camera other than a mirrorless camera, a film camera, a video camera, and a security camera.

[0745] The following additional notes are further disclosed with respect to the above-mentioned embodiments and examples.

[0746] [Supplementary Item 1]

[0747] A zoom lens, which comprises, in order from the object side to the image side, a first lens group and subsequent lens groups having negative optical power,

[0748] The subsequent group includes at least 3 lens groups,

[0749] One of the at least three lens groups is a P lens group with positive power,

[0750] When changing the magnification, the interval between the first lens group and the subsequent lens group changes, and all intervals between adjacent lens groups in the subsequent lens group change.

[0751] When the focal length of the entire system is set to fw when focusing on an object at infinity at the wide-angle end,

[0752] The focal length of the entire system at the telephoto end focusing on an object at infinity is ft.

[0753] The back focal length of the entire system at the air conversion distance when focusing on an object at infinity at the wide-angle end is Bfw.

[0754] When the maximum half angle of view in a state where the camera is focused on an object at infinity at the wide-angle end is ωw,

[0755] The zoom lens satisfies the following conditional expressions (1) and (2):

[0756] 1.5 <ft / fw<6 (1)

[0757] 0.4 <Bfw / (fw×tanωw)<2 (2)。

[0758] [Supplementary Item 2]

[0759] The zoom lens according to Supplementary Item 1, wherein:

[0760] Among the lens groups in the subsequent group, the P lens group has the largest amount of movement toward the object side when zooming from the wide-angle end to the telephoto end.

[0761] [Supplementary item 3]

[0762] The zoom lens according to Supplementary item 2, wherein:

[0763] The movement amount of the P lens group when zooming from the wide angle end to the telephoto end is ΔP,

[0764] When the sign of the movement amount during zooming is set to negative when moving toward the object side and to positive when moving toward the image side,

[0765] The zoom lens satisfies the following conditional formula (3):

[0766] 0.9<(-ΔP) / fw<6 (3).

[0767] [Supplementary Item 4]

[0768] The zoom lens according to Supplementary Item 2 includes an N lens group having negative refractive power on the image side of the P lens group.

[0769] [Supplementary Note 5]

[0770] The zoom lens according to Supplementary item 4, wherein:

[0771] The zoom lens includes a final lens group located closest to the image side than the N lens group.

[0772] [Supplementary Item 6]

[0773] The zoom lens according to Supplementary item 4 or 5, wherein:

[0774] At least a part of the N lens group is a focusing group that moves along the optical axis during focusing.

[0775] [Supplementary Item 7]

[0776] The zoom lens according to any one of Supplementary Items 4 to 6, wherein:

[0777] When the focal length of the N lens group is set to fN,

[0778] The zoom lens satisfies the following condition (4):

[0779] 0.5<(-fN) / fw<7 (4).

[0780] [Supplementary Item 8]

[0781] The zoom lens according to any one of Supplementary Items 1 to 7, wherein:

[0782] When the open F value in the state of focusing on an object at infinity at the telephoto end is Fnot,

[0783] The zoom lens satisfies the following conditional formula (5):

[0784] 1.2<Fnot<5.8 (5).

[0785] [Supplementary Item 9]

[0786] The zoom lens according to any one of Supplementary Items 1 to 8, wherein:

[0787] When the open F value in a state where the lens is focused on an object at infinity at the telephoto end is Fnot and the open F value in a state where the lens is focused on an object at infinity at the wide-angle end is Fnow, the zoom lens satisfies the following conditional expression (6):

[0788] 0.95 <Fnot / Fnow<1.8 (6)。

[0789] [Supplementary Item 10]

[0790] A zoom lens according to any one of Supplementary Items 2 to 7, wherein:

[0791] When the focal length of the P lens group is set to fP,

[0792] The zoom lens satisfies the following conditional formula (7):

[0793] 0.5 <fP / fw<6 (7)。

[0794] [Supplementary Note 11]

[0795] The zoom lens according to any one of Supplementary Notes 1 to 10, which satisfies the following Conditional Formula (8):

[0796] 35<ωw<54 (8).

[0797] [Supplementary Item 12]

[0798] The zoom lens according to Supplementary item 5, wherein:

[0799] The final lens group has positive optical power.

[0800] [Supplementary Item 13]

[0801] A zoom lens according to any one of Supplementary Items 4 to 7, wherein:

[0802] An M lens group is included between the P lens group and the N lens group.

[0803] [Supplementary Item 14]

[0804] The zoom lens according to any one of Supplementary Items 1 to 13, wherein:

[0805] The P lens group has the largest movement toward the object side when zooming from the wide-angle end to the telephoto end among the lens groups in the subsequent group.

[0806] An N lens group having negative refractive power is included on the image side of the P lens group,

[0807] An M lens group is included between the P lens group and the N lens group,

[0808] The movement amount of the P lens group when zooming from the wide angle end to the telephoto end is ΔP,

[0809] When the sign of the movement amount during zooming is set to negative when moving toward the object side and to positive when moving toward the image side,

[0810] The zoom lens satisfies the following conditional formula (3):

[0811] 0.9<(-ΔP) / fw<6 (3).

[0812] [Supplementary Item 15]

[0813] The zoom lens according to Supplementary item 13 or 14, wherein:

[0814] The M lens group has positive refractive power.

[0815] [Supplementary Item 16]

[0816] A zoom lens according to any one of Supplementary Items 13 to 15, wherein:

[0817] When the focal length of the M lens group is set to fM,

[0818] The zoom lens satisfies the following conditional formula (9):

[0819] 0.01 <fw / fM<0.35 (9)。

[0820] [Supplementary Item 17]

[0821] A zoom lens according to any one of Supplementary Items 13 to 16, wherein:

[0822] The refractive index of the positive lens closest to the image side among the positive lenses in the M lens group with respect to the d-line is NMp,

[0823] When the Abbe number of the d-line reference of the positive lens closest to the image side among the positive lenses in the M lens group is v Mp,

[0824] The zoom lens satisfies the following conditional equations (10) and (11):

[0825] 1.73 <NMp<2.5 (10)

[0826] 10<v Mp<50 (11).

[0827] [Supplementary Item 18]

[0828] A zoom lens according to any one of Supplementary Items 13 to 17, wherein:

[0829] The M lens group includes an aperture stop on the object side.

[0830] [Supplementary Item 19]

[0831] The zoom lens according to any one of Supplementary Items 1 to 18, wherein:

[0832] The first lens unit includes a negative meniscus lens whose concave surface faces the image side on the most object side.

[0833] [Supplementary item 20]

[0834] The zoom lens according to any one of Supplementary Items 1 to 19, wherein:

[0835] When the focal length of the first lens unit is f1,

[0836] The zoom lens satisfies the following conditional formula (12):

[0837] 1<(-f1) / fw<2.5 (12).

[0838] [Supplementary item 21]

[0839] The zoom lens according to any one of Supplementary Items 1 to 20, wherein:

[0840] When the distance on the optical axis from the lens surface of the first lens group most on the object side to the lens surface of the first lens group most on the image side is denoted as DG1,

[0841] The zoom lens satisfies the following conditional formula (13):

[0842] 0.71 <DG1 / (fw×tanωw)<2.5 (13)。

[0843] [Supplementary item 22]

[0844] A zoom lens according to any one of Supplementary Items 2 to 7, wherein:

[0845] When the distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is denoted as DGP,

[0846] The zoom lens satisfies the following conditional formula (14):

[0847] 0.35 <DGP / (fw×tanωw)<2.5 (14)。

[0848] [Supplementary item 23]

[0849] The zoom lens according to any one of Supplementary Items 1 to 22, wherein:

[0850] When Denw is the distance on the optical axis from the lens surface closest to the object to the paraxial entrance pupil position in a state where the lens is focused on an infinitely distant object at the wide angle end,

[0851] The zoom lens satisfies the following conditional formula (15):

[0852] 1 <Denw / fw<2.2 (15)。

[0853] [Supplementary item 24]

[0854] A zoom lens according to any one of Supplementary Items 1 to 23, wherein:

[0855] When the average value of the specific gravity of all the lenses in the first lens group is defined as Glave,

[0856] The zoom lens satisfies the following conditional formula (16):

[0857] 1<Glave<5 (16).

[0858] [Supplementary item 25]

[0859] A zoom lens according to any one of Supplementary Items 2 to 7, wherein:

[0860] When the average value of the specific gravity of all lenses in the P lens group is GPave,

[0861] The zoom lens satisfies the following conditional formula (17):

[0862] 1 <GPave<5 (17)。

[0863] [Supplementary item 26]

[0864] The zoom lens according to Supplementary item 6, wherein:

[0865] The average value of the specific gravity of all lenses in the focusing group is set to Gfave,

[0866] The distance on the optical axis from the lens surface closest to the object side of the focusing group to the lens surface closest to the image side of the focusing group is defined as DGfoc,

[0867] When the focal length of the focus group is set to ffoc,

[0868] The zoom lens satisfies the following conditional formula (18):

[0869] 0.03 <Gfave×DGfoc / |ffoc|<0.9 (18)。

[0870] [Supplementary item 27]

[0871] A zoom lens according to any one of Supplementary Items 2 to 7, wherein:

[0872] When the focal length of the first lens group is set to f1,

[0873] When the focal length of the P lens group is fP,

[0874] The zoom lens satisfies the following conditional formula (19):

[0875] 0.3<(-f1) / fP<1.5 (19).

[0876] [Supplementary item 28]

[0877] A zoom lens according to any one of Supplementary Items 13 to 18, wherein:

[0878] When the focal length of the first lens group is set to f1,

[0879] When the focal length of the M lens group is fM,

[0880] The zoom lens satisfies the following conditional formula (20):

[0881] 0<(-f1) / fM<0.7 (20).

[0882] [Supplementary item 29]

[0883] A zoom lens according to any one of Supplementary Items 13 to 18, wherein:

[0884] When the focal length of the P lens group is set to fP,

[0885] When the focal length of the M lens group is fM,

[0886] The zoom lens satisfies the following conditional formula (21):

[0887] 0 <fP / fM<2 (21)。

[0888] [Supplementary item 30]

[0889] The zoom lens according to Supplementary item 6, wherein:

[0890] When the focal length of the focus group is set to ffoc,

[0891] The zoom lens satisfies the following conditional formula (22):

[0892] 1.2<(-ffoc) / (fw×tanωw)<5.5 (22).

[0893] [Supplementary item 31]

[0894] The zoom lens according to any one of Supplementary Items 1 to 30, wherein:

[0895] The first lens group includes at least one aspherical lens.

[0896] When the paraxial curvature radius of the object-side surface of the aspherical lens of the first lens group is Rc1f,

[0897] The paraxial curvature radius of the image-side surface of the aspherical lens of the first lens group is Rc1 r,

[0898] The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the first lens group is denoted as Ry1f,

[0899] When the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the first lens unit is denoted by Ry1r,

[0900] The zoom lens satisfies the following conditional formula (23):

[0901] 1.05<(1 / Rc 1f-1 / Rc 1r) / (1 / Ry1f-1 / Ry1r)<8 (23).

[0902] [Supplementary item 32]

[0903] A zoom lens according to any one of Supplementary Items 2 to 7, wherein:

[0904] The P lens group includes at least one aspherical lens.

[0905] When the paraxial curvature radius of the object-side surface of the aspherical lens of the P lens group is Rc Pf,

[0906] The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the P lens group is denoted as RyPf,

[0907] The refractive index of the aspherical lens of the P lens group with respect to the d-line is NP,

[0908] When the focal length of the P lens group is fP,

[0909] The zoom lens satisfies the following conditional formula (24):

[0910] 0.01<(1 / RcPf-1 / RyPf)×NP×fP<5 (24).

[0911] [Supplementary item 33]

[0912] A zoom lens according to any one of Supplementary Items 4 to 7, wherein:

[0913] The N lens group includes at least one aspherical lens,

[0914] When the paraxial curvature radius of the object-side surface of the aspherical lens of the N lens group is RcNf,

[0915] The paraxial curvature radius of the image-side surface of the aspherical lens of the N lens group is RcNr,

[0916] The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the N lens group is denoted as RyNf,

[0917] When the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the N lens group is denoted as RyNr,

[0918] The zoom lens satisfies the following conditional formula (25):

[0919] 0.7<(1 / RcNf-1 / RcNr) / (1 / RyNf-1 / RyNr)<0.996 (25).

[0920] [Supplementary item 34]

[0921] The zoom lens according to Supplementary item 5, wherein:

[0922] The final lens group includes at least one aspherical lens,

[0923] When the paraxial curvature radius of the object-side surface of the aspherical lens of the final lens group is set to RcEf,

[0924] The paraxial curvature radius of the image-side surface of the aspheric lens of the final lens group is RcE r,

[0925] The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the final lens group is set to RyEf,

[0926] When the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the N lens group is denoted as RyEr,

[0927] The zoom lens satisfies the following conditional formula (26):

[0928] 1.01<(1 / RcEf-1 / RcEr) / (1 / RyEf-1 / RyEr)<2 (26).

[0929] [Supplementary item 35]

[0930] A zoom lens according to any one of Supplementary Items 1 to 34, wherein:

[0931] The first lens group includes at least one negative lens.

[0932] When the Abbe number of the negative lens of the first lens group based on the d-line is vln,

[0933] When the partial dispersion ratio between the g-line and the F-line of the negative lens of the first lens group is θgF1n,

[0934] The zoom lens satisfies the following conditional equations (27) and (28):

[0935] 55<vln<110 (27)

[0936] 0.003<θgFln-(0.6438-0.001682×vln)<0.05 (28).

[0937] [Supplementary item 36]

[0938] A zoom lens according to any one of Supplementary Items 2 to 7, wherein:

[0939] The P lens group includes at least one negative lens.

[0940] When the d-line Abbe number of the negative lens of the P lens group is vPn and the partial dispersion ratio between the g-line and the F-line of the negative lens of the P lens group is θgFPn,

[0941] The zoom lens satisfies the following conditional equations (29) and (30):

[0942] 55 <vPn<110 (29)

[0943] 0.003<θgFPn-(0.6438-0.001682×vPn)<0.05 (30).

[0944] [Supplementary item 37]

[0945] A zoom lens according to any one of Supplementary Items 4 to 7, wherein:

[0946] The N lens group includes at least one negative lens.

[0947] When the d-line Abbe number of the negative lens of the N lens group is vNn and the partial dispersion ratio between the g-line and the F-line of the negative lens of the N lens group is θgFNn,

[0948] The zoom lens satisfies the following conditional equations (31) and (32):

[0949] 55<vNn<110 (31)

[0950] 0.003<θgFNn-(0.6438-0.001682×vNn)<0.05 (32).

[0951] [Supplementary item 38]

[0952] A zoom lens according to any one of Supplementary Items 13 to 18, wherein:

[0953] The M lens group includes at least one negative lens.

[0954] When the d-line-based Abbe number of the negative lens of the M lens group is vMn,

[0955] When the partial dispersion ratio between the g-line and the F-line of the negative lens of the M lens group is θgFMn,

[0956] The zoom lens satisfies the following conditional equations (33) and (34):

[0957] 55<vMn<110 (33)

[0958] 0.003<θgFMn-(0.6438-0.001682×vMn)<0.06 (34).

[0959] [Supplementary item 39]

[0960] The zoom lens according to Supplementary item 5, wherein:

[0961] The final lens group includes at least one positive lens.

[0962] When the Abbe number of the d-line reference of the positive lens of the final lens group is set to vEp,

[0963] When the partial dispersion ratio between the g-line and the F-line of the positive lens in the final lens group is θgFEp,

[0964] The zoom lens satisfies the following conditional equations (35) and (36):

[0965] 55<vEp<110 (35)

[0966] 0.003<θgFEp-(0.6438-0.001682×vEp)<0.05 (36).

[0967] [Supplementary item 40]

[0968] A zoom lens according to any one of Supplementary Items 1 to 39, wherein:

[0969] The first lens group includes at least one positive lens.

[0970] When the refractive index of the positive lens of the first lens group with respect to the d-line is N1p,

[0971] When the d-line-based Abbe number of the positive lens of the first lens group is vlp,

[0972] The zoom lens satisfies the following conditional equations (37) and (38):

[0973] 1.8<N1p<2.3 (37)

[0974] 10<v1p<45 (38).

[0975] [Supplementary Item 41]

[0976] The zoom lens according to Supplementary item 5, wherein:

[0977] The final lens group is fixed relative to the image plane during zooming.

[0978] [Supplementary item 42]

[0979] The zoom lens according to Supplementary item 19, wherein:

[0980] The first lens group includes a biconcave lens disposed on the image side of the negative meniscus lens and a positive lens disposed on the image side of the biconcave lens. [Supplementary Note 43]

[0981] A zoom lens according to any one of Supplementary Items 1 to 42, wherein:

[0982] The first lens group at the telephoto end is located closer to the image side than the first lens group at the wide-angle end.

[0983] [Supplementary item 44]

[0984] A zoom lens according to any one of Supplementary Items 1 to 42, wherein:

[0985] The first lens group at the telephoto end is located closer to the object side than the first lens group at the wide-angle end.

[0986] [Supplementary item 45]

[0987] A zoom lens according to any one of Supplementary Items 1 to 44, wherein:

[0988] The subsequent group includes an aperture stop,

[0989] At least one negative lens having a concave surface facing the object side is arranged on the image side of the aperture stop,

[0990] The distance on the optical axis between the aperture stop in a state where the aperture is focused on an infinitely distant object at the wide angle end and the negative lens with the concave surface facing the object side is DSInw,

[0991] When TLw is the sum of the distance on the optical axis from the lens surface of the first lens group closest to the object to the lens surface of the subsequent lens group closest to the image when the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance,

[0992] The zoom lens satisfies the following conditional formula (39):

[0993] 0.001 <DSInw / TLw<0.12 (39)。

[0994] [Supplementary item 46]

[0995] A zoom lens according to any one of Supplementary Items 1 to 45, wherein:

[0996] The subsequent group includes an aperture stop,

[0997] At least one negative lens having a concave surface facing the image side is arranged on the object side of the aperture stop,

[0998] The distance on the optical axis between the aperture stop in a state where the aperture is focused on an infinitely distant object at the wide angle end and the negative lens with the concave surface facing the image side is DSOnw,

[0999] When TLw is the sum of the distance on the optical axis from the lens surface of the first lens group closest to the object to the lens surface of the subsequent lens group closest to the image when the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance,

[1000] The zoom lens satisfies the following conditional formula (40):

[1001] 0.001 <DSOnw / TLw<0.18 (40)。

[1002] [Supplementary Item 47]

[1003] A zoom lens according to any one of Supplementary Items 1 to 46, wherein:

[1004] The subsequent group includes an aperture stop,

[1005] At least one cemented lens is arranged on the image side of the aperture stop,

[1006] The distance on the optical axis between the aperture stop and the cemented surface of the cemented lens on the image side of the aperture stop in a state where the aperture stop is focused on an infinitely distant object at the wide angle end is denoted as DSIcew,

[1007] When TLw is the sum of the distance on the optical axis from the lens surface of the first lens group closest to the object to the lens surface of the subsequent lens group closest to the image when the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance,

[1008] The zoom lens satisfies the following conditional formula (41):

[1009] 0.001 <DSIcew / TLw<0.12 (41)。

[1010] [Supplementary item 48]

[1011] A zoom lens according to any one of Supplementary Items 1 to 47, wherein:

[1012] The subsequent group includes an aperture stop,

[1013] At least one cemented lens is arranged on the object side of the aperture stop,

[1014] The distance on the optical axis between the aperture stop and the cemented surface of the cemented lens on the object side of the aperture stop in a state where the aperture stop is focused on an infinitely distant object at the wide angle end is denoted as DSOcew,

[1015] When TLw is the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state where the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance,

[1016] The zoom lens satisfies the following conditional formula (42):

[1017] 0.001 <DSOcew / TLw<0.18 (42)。

[1018] [Supplementary item 49]

[1019] A zoom lens according to any one of Supplementary Items 4 to 7, wherein:

[1020] The movement amount of the N lens groups when zooming from the wide angle end to the telephoto end is ΔN,

[1021] The movement amount of the P lens group when zooming from the wide angle end to the telephoto end is ΔP,

[1022] When the sign of the movement amount during zooming is set to negative when moving toward the object side and to positive when moving toward the image side,

[1023] The zoom lens satisfies the following conditional formula (43):

[1024] 0.1<ΔN / ΔP<0.75 (43).

[1025] [Supplementary item 50]

[1026] A zoom lens according to any one of Supplementary Items 1 to 49, wherein:

[1027] When Dexw is the sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group in a state where the lens is focused on an infinitely distant object at the wide-angle end and the back focus of the entire system at the air conversion distance,

[1028] The zoom lens satisfies the following conditional formula (44):

[1029] 1.5 <Dexw / (fw×tanωw)<5 (44)。

[1030] [Supplementary item 51]

[1031] A zoom lens according to any one of Supplementary Items 2 to 7, wherein:

[1032] When the telephoto lens is in focus on an object at infinity, the open F value is set to Fnot.

[1033] When the distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is defined as DGP,

[1034] The zoom lens satisfies the following conditional formula (45):

[1035] 0.4 <Fnot×DGP / ft<4 (45)。

[1036] [Supplementary item 52]

[1037] A zoom lens according to any one of Supplementary Items 13 to 18, wherein:

[1038] When the telephoto lens is in focus on an object at infinity, the open F value is set to Fnot.

[1039] The distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is defined as DGP,

[1040] When the distance on the optical axis from the lens surface closest to the object side of the M lens group to the lens surface closest to the image side of the M lens group is denoted as DGM,

[1041] The zoom lens satisfies the following conditional formula (46):

[1042] 0.4<Fnot×(DGP+DGM) / ft<4 (46).

[1043] [Supplementary item 53]

[1044] A zoom lens according to any one of Supplementary Items 1 to 52, wherein:

[1045] One lens group is included between the first lens group and the P lens group.

[1046] [Supplementary item 54]

[1047] A zoom lens according to any one of Supplementary Items 1 to 53, wherein:

[1048] When TLt is the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state where the lens is focused on an infinitely distant object at the telephoto end and the back focus of the entire system at the air conversion distance,

[1049] The zoom lens satisfies the following conditional formula (47):

[1050] 1.2 <TLt / ft<5 (47)。

[1051] [Supplementary item 55]

[1052] The zoom lens according to Supplementary item 12, wherein:

[1053] When the focal length of the final lens group is set to fE,

[1054] The zoom lens satisfies the following conditional formula (48):

[1055] 0.1 <fw / fE<0.7 (48)。

[1056] [Supplementary item 56]

[1057] The zoom lens according to Supplementary item 6, wherein:

[1058] The lateral magnification of the focus group in a state where the focus is focused on an infinitely distant object at the wide angle end is β fw,

[1059] When the combined lateral magnification of all lenses on the image side of the focusing group in a state where the lens is focused on an object at infinity at the wide angle end is βfRw,

[1060] The zoom lens satisfies the following conditional formula (49):

[1061] 0.3<|(1-β fw 2 )×β fRw 2 |<3 (49).

[1062] [Supplementary item 57]

[1063] The zoom lens according to Supplementary item 6, wherein:

[1064] The lateral magnification of the focus group in a state where the focus is focused on an infinitely distant object at the telephoto end is set to β ft,

[1065] When the combined lateral magnification of all lenses on the image side of the focusing group in a state where the lens is focused on an object at infinity at the telephoto end is β fRt,

[1066] The zoom lens satisfies the following conditional formula (50):

[1067] 0.5<|(1-β ft 2 )×β fRt 2 |<4 (50).

[1068] [Supplementary item 58]

[1069] A zoom lens according to Supplementary item 6 or 56, wherein:

[1070] The lateral magnification of the focus group in a state where the focus is focused on an infinitely distant object at the wide angle end is β fw,

[1071] The combined lateral magnification of all lenses on the image side of the focusing group in a state where the lenses are focused on an infinitely distant object at the wide angle end is β fRw,

[1072] The focal length of the focus group is set to ffoc,

[1073] The composite focal length of all lenses on the image side of the focusing group in a state where the lenses are focused on an object at infinity at the wide angle end is ffRw,

[1074] The sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group in the state of focusing on an infinitely distant object at the wide-angle end and the back focus of the entire system at the air conversion distance is set to Dexw, and

[1075] γw=(1-β fw 2 )×β fRw 2 ,

[1076] In the case of BRw={βfw / (ffoc×γw)-1 / (βfRw×ffRw)-(1 / DeXW)},

[1077] The zoom lens satisfies the following conditional formula (51):

[1078] 0<(-BRw)×(fw×tanωw)<0.7 (51).

[1079] [Supplementary item 59]

[1080] A zoom lens according to Supplementary item 6 or 57, wherein:

[1081] The lateral magnification of the focus group in a state where the focus is focused on an infinitely distant object at the telephoto end is set to β ft,

[1082] The combined lateral magnification of all lenses on the image side of the focusing group in a state where the lenses are focused on an infinitely distant object at the telephoto end is β fRt,

[1083] The focal length of the focus group is set to ffoc,

[1084] The combined focal length of all lenses on the image side of the focusing group in a state where the lenses are focused on an object at infinity at the telephoto end is ffRt,

[1085] The sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group in a state where the lens is focused on an infinitely distant object at the telephoto end and the back focal length of the entire system at the air conversion distance is set to Dext,

[1086] The maximum half angle of view when focusing on an object at infinity at the telephoto end is ωt, and

[1087] γt=(1-β ft 2 )×β fRt 2 ,

[1088] In the case of BRt={β ft / (ffoc×γ t)-1 / (β fRt×ffRt)-(1 / Dext)},

[1089] The zoom lens satisfies the following conditional formula (52):

[1090] 0<(-BRt)×(ft×tanωt)<0.5 (52).

[1091] [Supplementary item 60]

[1092] A zoom lens according to any one of supplementary items 1 to 59, comprising an aperture stop,

[1093] At least three lenses are included between the first lens group and the aperture stop.

[1094] [Supplementary item 61]

[1095] A zoom lens according to any one of supplementary items 1 to 60, comprising an aperture stop,

[1096] At least three positive lenses are included between the first lens group and the aperture stop.

[1097] [Supplementary item 62]

[1098] A zoom lens according to any one of Supplementary Items 4 to 7, comprising an aperture stop,

[1099] At least three lenses are included between the aperture stop and the N lens group.

[1100] [Supplementary item 63]

[1101] A zoom lens according to any one of Supplementary Items 4 to 7, comprising an aperture stop,

[1102] At least two positive lenses are included between the aperture stop and the N lens group.

[1103] [Supplementary item 64]

[1104] The zoom lens according to Supplementary item 6, wherein:

[1105] The number of lenses included in the focusing group is 2 or less.

[1106] [Supplementary item 65]

[1107] The zoom lens according to Supplementary item 5, wherein:

[1108] The number of lenses included in the final lens group is 2 or less.

[1109] [Supplementary item 66]

[1110] A zoom lens according to any one of Supplementary Items 1 to 65, wherein:

[1111] The lens surface of the first lens unit closest to the image side is a concave surface.

[1112] [Supplementary item 67]

[1113] A zoom lens according to any one of Supplementary Items 1 to 66, wherein:

[1114] Among the movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end, there are five movement trajectories that are different from each other.

[1115] [Supplementary item 68]

[1116] A zoom lens according to any one of Supplementary Items 1 to 66, wherein:

[1117] Among the movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end, there are four movement trajectories that are different from each other.

[1118] [Supplementary item 69]

[1119] A zoom lens according to any one of Supplementary Items 1 to 66, wherein:

[1120] Among the movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end, there are three movement trajectories that are different from each other.

[1121] [Supplementary item 70]

[1122] A zoom lens according to any one of Supplementary Items 1 to 69, wherein:

[1123] At least one of the lens closest to the object side of the zoom lens and the second lens from the object side of the zoom lens is a negative lens,

[1124] When the refractive index of at least one of the lens closest to the object side of the zoom lens and the second lens from the object side of the zoom lens with respect to the d-line is set to Nobn,

[1125] The zoom lens satisfies the following conditional formula (53):

[1126] 1.7 <Nobn<2.2 (53)。

[1127] [Supplementary item 71]

[1128] The zoom lens according to supplementary item 70, wherein:

[1129] The lens closest to the object side of the zoom lens is a negative lens and satisfies the conditional expression (53).

[1130] [Supplementary item 72]

[1131] An imaging device comprising the zoom lens according to any one of Supplementary Items 1 to 71.

[1132] All documents, patent applications, and technical standards described in this specification are incorporated herein by reference to the same extent as if each individual document, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

Claims

1. A zoom lens, comprising, in order from the object side to the image side, a first lens group and subsequent lens groups having negative refractive power, The subsequent group includes at least 3 lens groups, One of the at least three lens groups is a P lens group with positive power, When changing the magnification, the interval between the first lens group and the subsequent lens group changes, and all intervals between adjacent lens groups in the subsequent lens group change. When the focal length of the entire system is set to fw when focusing on an object at infinity at the wide-angle end, The focal length of the entire system at the telephoto end focusing on an object at infinity is ft. The back focal length of the entire system at the air conversion distance when focusing on an object at infinity at the wide-angle end is Bfw. When the maximum half angle of view in a state where the camera is focused on an object at infinity at the wide-angle end is ωw, The zoom lens satisfies the following conditional expressions (1) and (2): 1.5<ft / fw<6 (1) 0.4<Bfw / (fw×tanωw)<2 (2).

2. The zoom lens according to claim 1, wherein: Among the lens groups in the subsequent group, the P lens group has the largest amount of movement toward the object side when zooming from the wide-angle end to the telephoto end.

3. The zoom lens according to claim 2, wherein: The movement amount of the P lens group when zooming from the wide angle end to the telephoto end is ΔP, When the sign of the movement amount during zooming is set to negative when moving toward the object side and to positive when moving toward the image side, The zoom lens satisfies the following conditional formula (3): 0.9<(-ΔP) / fw<6 (3). 4 . The zoom lens according to claim 2 , further comprising an N lens group having negative refractive power on the image side of the P lens group.

5. The zoom lens according to claim 4, wherein: The zoom lens includes a final lens group located closest to the image side than the N lens group.

6. The zoom lens according to claim 4, wherein: At least a part of the N lens group is a focusing group that moves along the optical axis during focusing.

7. The zoom lens according to claim 4, wherein: When the focal length of the N lens group is set to fN, The zoom lens satisfies the following condition (4): 0.5<(-fN) / fw<7 (4).

8. The zoom lens according to claim 1, wherein: When the open F value in the state of focusing on an object at infinity at the telephoto end is Fnot, The zoom lens satisfies the following conditional formula (5): 1.2<Fnot<5.8 (5).

9. The zoom lens according to claim 1, wherein: When the telephoto lens is in focus on an object at infinity, the open F value is set to Fnot. When the wide-angle end is focused on an object at infinity, the open F value is set to Fnow. The zoom lens satisfies the following conditional formula (6): 0.95<Fnot / Fnow<1.8 (6).

10. The zoom lens according to claim 2, wherein: When the focal length of the P lens group is set to fP, The zoom lens satisfies the following conditional formula (7): 0.5<fP / fw<6 (7).

11. The zoom lens according to claim 1, which satisfies the following conditional formula (8): 35<ωw<54 (8).

12. The zoom lens according to claim 5, wherein: The final lens group has positive optical power.

13. The zoom lens according to claim 4, wherein: An M lens group is included between the P lens group and the N lens group.

14. The zoom lens according to claim 1, wherein: The P lens group has the largest movement toward the object side when zooming from the wide-angle end to the telephoto end among the lens groups in the subsequent group. An N lens group having negative refractive power is included on the image side of the P lens group, An M lens group is included between the P lens group and the N lens group, The movement amount of the P lens group when zooming from the wide angle end to the telephoto end is ΔP, When the sign of the movement amount during zooming is set to negative when moving toward the object side and to positive when moving toward the image side, The zoom lens satisfies the following conditional formula (3): 0.9<(-ΔP) / fw<6 (3).

15. The zoom lens according to claim 13, wherein: The M lens group has positive refractive power.

16. The zoom lens according to claim 13, wherein: When the focal length of the M lens group is set to fM, The zoom lens satisfies the following conditional formula (9): 0.01<fw / fM<0.35 (9).

17. The zoom lens according to claim 13, wherein: The refractive index of the positive lens closest to the image side among the positive lenses in the M lens group with respect to the d-line is NMp, When the Abbe number of the d-line reference of the positive lens closest to the image side among the positive lenses in the M lens group is v Mp, The zoom lens satisfies the following conditional equations (10) and (11): 1.73<NMp<2.5 (10) 10<v Mp<50 (11).

18. The zoom lens according to claim 13, wherein: The M lens group includes an aperture stop on the object side.

19. The zoom lens according to claim 1, wherein: The first lens unit includes a negative meniscus lens whose concave surface faces the image side on the most object side.

20. The zoom lens according to claim 1, wherein: When the focal length of the first lens unit is f1, The zoom lens satisfies the following conditional formula (12): 1<(-f1) / fw<2.5 (12).

21. The zoom lens according to claim 1, wherein: When the distance on the optical axis from the lens surface of the first lens group most on the object side to the lens surface of the first lens group most on the image side is denoted as DG1, The zoom lens satisfies the following conditional formula (13): 0.71<DG1 / (fw×tanωw)<2.5 (13).

22. The zoom lens according to claim 2, wherein: When the distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is denoted as DGP, The zoom lens satisfies the following conditional formula (14): 0.35<DGP / (fw×tanωw)<2.5 (14).

23. The zoom lens according to claim 1, wherein: When Denw is the distance on the optical axis from the lens surface closest to the object to the paraxial entrance pupil position in a state where the lens is focused on an infinitely distant object at the wide angle end, The zoom lens satisfies the following conditional formula (15): 1<Denw / fw<2.2 (15).

24. The zoom lens according to claim 1, wherein: When the average value of the specific gravity of all the lenses in the first lens group is G1ave, The zoom lens satisfies the following conditional formula (16): 1<Glave<5 (16).

25. The zoom lens according to claim 2, wherein: When the average value of the specific gravity of all lenses in the P lens group is GPave, The zoom lens satisfies the following conditional formula (17): 1<GPave<5 (17).

26. The zoom lens according to claim 6, wherein: The average value of the specific gravity of all lenses in the focusing group is set to Gfave, The distance on the optical axis from the lens surface closest to the object side of the focusing group to the lens surface closest to the image side of the focusing group is defined as DGfoc, When the focal length of the focus group is set to ffoc, The zoom lens satisfies the following conditional formula (18): 0.03<Gfave×DGfoc / |ffoc|<0.9 (18).

27. The zoom lens according to claim 2, wherein: When the focal length of the first lens group is set to f1, When the focal length of the P lens group is fP, The zoom lens satisfies the following conditional formula (19): 0.3<(-f1) / fP<1.5 (19).

28. The zoom lens according to claim 13, wherein: When the focal length of the first lens group is set to f1, When the focal length of the M lens group is fM, The zoom lens satisfies the following conditional formula (20): 0<(-f1) / fM<0.7 (20).

29. The zoom lens according to claim 13, wherein: When the focal length of the P lens group is set to fP, When the focal length of the M lens group is fM, The zoom lens satisfies the following conditional formula (21): 0<fP / fM<2 (21).

30. The zoom lens according to claim 6, wherein: When the focal length of the focus group is set to ffoc, The zoom lens satisfies the following conditional formula (22): 1.2<(-ffoc) / (fw×tanωw)<5.5 (22).

31. The zoom lens according to claim 1, wherein: The first lens group includes at least one aspherical lens. When the paraxial curvature radius of the object-side surface of the aspherical lens of the first lens group is Rc1f, The paraxial curvature radius of the image-side surface of the aspherical lens of the first lens group is Rc1r, The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the first lens group is denoted as Ry1f, When the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the first lens unit is denoted by Ry1r, The zoom lens satisfies the following conditional formula (23): 1.05<(1 / Rc1f-1 / Rc1r) / (1 / Ry1f-1 / Ry1r)<8 (23).

32. The zoom lens according to claim 2, wherein: The P lens group includes at least one aspherical lens. When the paraxial curvature radius of the object-side surface of the aspherical lens of the P lens group is RcPf, The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the P lens group is denoted as RyPf, The refractive index of the aspherical lens of the P lens group with respect to the d-line is NP, When the focal length of the P lens group is fP, The zoom lens satisfies the following conditional formula (24): 0.01<(1 / RcPf-1 / RyPf)×NP×fP<5 (24).

33. The zoom lens according to claim 4, wherein: The N lens group includes at least one aspherical lens, When the paraxial curvature radius of the object-side surface of the aspherical lens of the N lens group is RcNf, The paraxial curvature radius of the image-side surface of the aspherical lens of the N lens group is RcNr, The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the N lens group is denoted as RyNf, When the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the N lens group is denoted as RyNr, The zoom lens satisfies the following conditional formula (25): 0.7<(1 / RcNf-1 / RcNr) / (1 / RyNf-1 / RyNr)<0.996 (25).

34. The zoom lens according to claim 5, wherein: The final lens group includes at least one aspherical lens, When the paraxial curvature radius of the object-side surface of the aspherical lens of the final lens group is set to RcEf, The paraxial curvature radius of the image-side surface of the aspheric lens of the final lens group is RcEr, The curvature radius at the position of the maximum effective diameter of the object-side surface of the aspherical lens of the final lens group is set to RyEf, When the curvature radius at the position of the maximum effective diameter of the image-side surface of the aspherical lens of the N lens group is denoted as RyEr, The zoom lens satisfies the following conditional formula (26): 1.01<(1 / RcEf-1 / RcEr) / (1 / RyEf-1 / RyEr)<2 (26).

35. The zoom lens according to claim 1, wherein: The first lens group includes at least one negative lens. When the Abbe number of the d-line reference of the negative lens of the first lens group is v1n, When the partial dispersion ratio between the g-line and the F-line of the negative lens of the first lens group is θgF1n, The zoom lens satisfies the following conditional equations (27) and (28): 55<v 1n<110 (27) 0.003<θgF1n-(0.6438-0.001682×v1n)<0.05 (28).

36. The zoom lens according to claim 2, wherein: The P lens group includes at least one negative lens. When the d-line-based Abbe number of the negative lens of the P lens group is v Pn, When the partial dispersion ratio between the g-line and the F-line of the negative lens of the P lens group is θgFPn, The zoom lens satisfies the following conditional equations (29) and (30): 55<v Pn<110 (29) 0.003<θgFPn-(0.6438-0.001682×v Pn)<0.05 (30).

37. The zoom lens according to claim 4, wherein: The N lens group includes at least one negative lens. When the d-line-based Abbe number of the negative lens of the N lens group is v Nn, When the partial dispersion ratio between the g-line and the F-line of the negative lens of the N lens group is set to 0gFNn, The zoom lens satisfies the following conditional equations (31) and (32): 55<v Nn<110 (31) 0.003<θgFNn-(0.6438-0.001682×v Nn)<0.05 (32).

38. The zoom lens according to claim 13, wherein: The M lens group includes at least one negative lens. When the d-line-based Abbe number of the negative lens of the M lens group is v Mn, When the partial dispersion ratio between the g-line and the F-line of the negative lens of the M lens group is θgFMn, The zoom lens satisfies the following conditional equations (33) and (34): 55<v Mn<110 (33) 0.003<θgFMn-(0.6438-0.001682×vMn)<0.06 (34).

39. The zoom lens according to claim 5, wherein: The final lens group includes at least one positive lens. When the Abbe number of the d-line reference of the positive lens of the final lens group is set to v Ep, When the partial dispersion ratio between the g-line and the F-line of the positive lens of the final lens group is θgF Ep, The zoom lens satisfies the following conditional equations (35) and (36): 55<v Ep<110 (35) 0.003<θgFEp-(0.6438-0.001682×v Ep)<0.05 (36).

40. The zoom lens according to claim 1, wherein: The first lens group includes at least one positive lens. When the refractive index of the positive lens of the first lens group with respect to the d-line is N1p, When the d-line-based Abbe number of the positive lens of the first lens group is v1p, The zoom lens satisfies the following conditional equations (37) and (38): 1.8<N1p<2.3 (37) 10<v 1p<45 (38).

41. The zoom lens according to claim 5, wherein: The final lens group is fixed relative to the image plane during zooming.

42. The zoom lens according to claim 19, wherein: The first lens group includes a biconcave lens disposed on the image side of the negative meniscus lens and a positive lens disposed on the image side of the biconcave lens.

43. The zoom lens according to claim 1, wherein: The first lens group at the telephoto end is located closer to the image side than the first lens group at the wide-angle end.

44. The zoom lens according to claim 1, wherein: The first lens group at the telephoto end is located closer to the object side than the first lens group at the wide-angle end.

45. The zoom lens according to claim 1, wherein: The subsequent group includes an aperture stop, At least one negative lens having a concave surface facing the object side is arranged on the image side of the aperture stop, The distance on the optical axis between the aperture stop in a state where the aperture is focused on an infinitely distant object at the wide angle end and the negative lens with the concave surface facing the object side is DSInw, When TLw is the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state where the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance, The zoom lens satisfies the following conditional formula (39): 0.001<DSInw / TLw<0.12 (39).

46. ​​The zoom lens according to claim 1, wherein: The subsequent group includes an aperture stop, At least one negative lens having a concave surface facing the image side is arranged on the object side of the aperture stop, The distance on the optical axis between the aperture stop in a state where the aperture is focused on an infinitely distant object at the wide angle end and the negative lens with the concave surface facing the image side is DSOnw, When TLw is the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state where the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance, The zoom lens satisfies the following conditional formula (40): 0.001<DSOnw / TLw<0.18 (40).

47. The zoom lens according to claim 1, wherein: The subsequent group includes an aperture stop, At least one cemented lens is arranged on the image side of the aperture stop, The distance on the optical axis between the aperture stop and the cemented surface of the cemented lens on the image side of the aperture stop in a state where the aperture stop is focused on an infinitely distant object at the wide angle end is denoted as DSIcew, When TLw is the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state where the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance, The zoom lens satisfies the following conditional formula (41): 0.001<DSIcew / TLw<0.12 (41).

48. The zoom lens according to claim 1, wherein: The subsequent group includes an aperture stop, At least one cemented lens is arranged on the object side of the aperture stop, The distance on the optical axis between the aperture stop and the cemented surface of the cemented lens on the object side of the aperture stop in a state where the aperture stop is focused on an infinitely distant object at the wide angle end is denoted as DSOcew, When TLw is the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state where the lens is focused on an infinitely distant object at the wide angle end and the back focus of the entire system at the air conversion distance, The zoom lens satisfies the following conditional formula (42): 0.001<DSOcew / TLw<0.18 (42).

49. The zoom lens according to claim 4, wherein: The movement amount of the N lens groups when zooming from the wide angle end to the telephoto end is ΔN, The movement amount of the P lens group when zooming from the wide angle end to the telephoto end is ΔP, When the sign of the movement amount during zooming is set to negative when moving toward the object side and to positive when moving toward the image side, The zoom lens satisfies the following conditional formula (43): 0.1<ΔN / ΔP<0.75 (43).

50. The zoom lens according to claim 1, wherein: When Dexw is the sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group in a state where the lens is focused on an infinitely distant object at the wide-angle end and the back focus of the entire system at the air conversion distance, The zoom lens satisfies the following conditional formula (44): 1.5<Dexw / (fw×tanωw)<5 (44).

51. The zoom lens according to claim 2, wherein: When the telephoto lens is in focus on an object at infinity, the open F value is set to Fnot. When the distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is defined as DGP, The zoom lens satisfies the following conditional formula (45): 0.4<Fnot×DGP / ft<4 (45).

52. The zoom lens according to claim 13, wherein: When the telephoto lens is in focus on an object at infinity, the open F value is set to Fnot. The distance on the optical axis from the lens surface of the P lens group closest to the object side to the lens surface of the P lens group closest to the image side is defined as DGP, When the distance on the optical axis from the lens surface closest to the object side of the M lens group to the lens surface closest to the image side of the M lens group is denoted as DGM, The zoom lens satisfies the following conditional formula (46): 0.4<Fnot×(DGP+DGM) / ft<4 (46).

53. The zoom lens according to claim 1, wherein: One lens group is included between the first lens group and the P lens group.

54. The zoom lens according to claim 1, wherein: When TLt is the sum of the distance on the optical axis from the lens surface closest to the object side of the first lens group to the lens surface closest to the image side of the subsequent lens group in a state where the lens is focused on an infinitely distant object at the telephoto end and the back focus of the entire system at the air conversion distance, The zoom lens satisfies the following conditional formula (47): 1.2<TLt / ft<5 (47).

55. The zoom lens according to claim 12, wherein: When the focal length of the final lens group is set to fE, The zoom lens satisfies the following conditional formula (48): 0.1<fw / fE<0.7 (48).

56. The zoom lens according to claim 6, wherein: The lateral magnification of the focus group in a state where the focus is focused on an infinitely distant object at the wide angle end is βfw, When the combined lateral magnification of all lenses on the image side of the focusing group in a state where the lens is focused on an object at infinity at the wide angle end is βfRw, The zoom lens satisfies the following conditional formula (49): 0.3<|(1-βfw 2 )×βfRw 2 |<3 (49)。 57. The zoom lens according to claim 6, wherein: The lateral magnification of the focusing group in a state where the focusing is performed at the telephoto end on an infinitely distant object is βft, When the combined lateral magnification of all the lenses on the image side of the focusing group in a state where the lens is focused on an infinitely distant object at the telephoto end is βfRt, The zoom lens satisfies the following conditional formula (50): 0.5<|(1-βft 2 )×βfRt 2 |<4 (50)。 58. The zoom lens according to claim 56, wherein: When the focal length of the focus group is set to ffoc, The composite focal length of all lenses on the image side of the focusing group in a state where the lenses are focused on an object at infinity at the wide angle end is ffRw, The sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group in the state of focusing on an infinitely distant object at the wide-angle end and the back focus of the entire system at the air conversion distance is set to Dexw, and γw=(1-βfw 2 )×βfRw 2 , In the case of BRw = {βfw / (ffoc×γw)-1 / (βfRw×ffRw)-(1 / Dexw)}, The zoom lens satisfies the following conditional formula (51): 0<(-BRw)×(fw×tanωw)<0.7 (51).

59. The zoom lens according to claim 57, wherein: When the focal length of the focus group is set to ffoc, The combined focal length of all lenses on the image side of the focusing group in a state where the lenses are focused on an object at infinity at the telephoto end is ffRt, The sum of the distance on the optical axis from the paraxial exit pupil position to the lens surface closest to the image side of the subsequent group when focusing on an infinitely distant object at the telephoto end and the back focal length of the entire system at the air conversion distance is set to Dext, The maximum half angle of view when focusing on an object at infinity at the telephoto end is ωt, and γt=(1-βft 2 )×βfRt 2 , In the case of BRt = {βft / (ffoc×γt)-1 / (βfRt×ffRt)-(1 / Dext)}, The zoom lens satisfies the following conditional formula (52): 0<(-BRt)×(ft×tanωt)<0.5 (52).

60. A zoom lens according to claim 1, comprising an aperture stop, At least three lenses are included between the first lens group and the aperture stop.

61. A zoom lens according to claim 1, comprising an aperture stop, At least three positive lenses are included between the first lens group and the aperture stop.

62. A zoom lens according to claim 4, comprising an aperture stop, At least three lenses are included between the aperture stop and the N lens group.

63. A zoom lens according to claim 4, comprising an aperture stop, At least two positive lenses are included between the aperture stop and the N lens group.

64. The zoom lens according to claim 6, wherein: The number of lenses included in the focusing group is 2 or less.

65. The zoom lens according to claim 5, wherein: The number of lenses included in the final lens group is 2 or less.

66. The zoom lens according to claim 1, wherein: The lens surface of the first lens unit closest to the image side is a concave surface.

67. The zoom lens according to claim 1, wherein: Among the movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end, there are five movement trajectories that are different from each other.

68. The zoom lens according to claim 1, wherein: Among the movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end, there are four movement trajectories that are different from each other.

69. The zoom lens according to claim 1, wherein: Among the movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end, there are three movement trajectories that are different from each other.

70. The zoom lens according to claim 1, wherein: At least one of the lens closest to the object side of the zoom lens and the second lens from the object side of the zoom lens is a negative lens, When the refractive index of at least one of the lens closest to the object side of the zoom lens and the second lens from the object side of the zoom lens with respect to the d-line is Nobn, The zoom lens satisfies the following conditional formula (53): 1.7<Nobn<2.2 (53).

71. A zoom lens according to claim 70, wherein: The lens closest to the object side of the zoom lens is a negative lens and satisfies the conditional expression (53).

72. An imaging device comprising the zoom lens according to any one of claims 1 to 71.

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