Zoom lens and imaging device

Abstract

The invention provides a zoom lens and an imaging device provided with the zoom lens. The zoom lens has a large image circle, a wide angle, a small structure and good optical performance. The zoom lens includes: a first lens group disposed closest to an object side and having a positive refractive power; an intermediate group including a plurality of lens groups; and a final lens group disposed closest to the image side. When changing magnification, all intervals between adjacent lens groups change. The first lens group includes two negative lenses consecutively arranged in order from the closest object side to the image side, and the negative lens on the object side of the two negative lenses is a meniscus lens having a convex surface facing the object side. The zoom lens satisfies the conditional expression 0.1 < fw / f1 < 0.8 with respect to the focal length f1 of the first lens group and the focal length fw of the entire system at the wide-angle end.

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 imaging devices such as broadcast cameras and video cameras for filming movies, a zoom lens described in Patent Document 1 listed below is known.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2019-078849

[0004] Zoom lenses are expected to have a large image circle, a wide angle, a compact structure, and good optical performance, and these requirements are increasing year by year. Summary of the Invention

[0005] The present invention provides a zoom lens and an imaging device equipped with the zoom lens. The zoom lens has a large image circle and a wide angle, a compact structure, and good optical performance.

[0006] A first embodiment of the present invention is a zoom lens comprising: a first lens group disposed closest to the object side and having positive refractive power; an intermediate lens group including a plurality of lens groups; and a final lens group disposed closest to the image side, wherein all intervals between adjacent lens groups change during zooming, the first lens group including two negative lenses in sequence from the closest object side to the image side, the negative lens on the object side of the two negative lenses being a meniscus lens with its convex surface facing the object side.

[0007] The zoom lens satisfies the conditional equation (1) represented by the following equation:

[0008] 0.1<fw / f1<0.8 (1).

[0009] Here, the focal length of the entire system in a state where the lens is focused on an object at infinity at the wide-angle end is fw, and the focal length of the first lens group is f1.

[0010] A second aspect of the present invention is a zoom lens according to the first aspect, wherein the zoom lens satisfies the following conditional expression (2):

[0011] 0.1<H1f / Hft<0.95 (2).

[0012] Here, the distance on the optical axis from the lens surface closest to the object of the first lens group, when focused on an object at infinity, to the object-side principal point of the first lens group is H1f. The distance on the optical axis from the lens surface closest to the object of the first lens group, when focused on an object at infinity at the telephoto end, to the object-side principal point of the entire system is Hft. The signs of H1f and Hft are negative on the object side and positive on the image side, with the lens surface closest to the object of the first lens group as reference.

[0013] A third aspect of the present invention is a zoom lens according to the first aspect, further comprising an L1n lens having negative refractive power disposed adjacent to the image side of the L1p lens, which is the most object-side positive lens in the first lens group.

[0014] A fourth aspect of the present invention is the zoom lens according to the first aspect, wherein the conditional expression (2-1) represented by the following equation is satisfied:

[0015] 0.28<H1f / Hft<0.7(2-1).

[0016] The definitions of the symbols in the conditional expression (2-1) are the same as those in the conditional expression (2) of the second embodiment.

[0017] According to a fifth aspect of the present invention, in the zoom lens of the first aspect, when the distance on the optical axis between the object-side principal point position of the first lens group and the image-side principal point position of the first lens group in a state in which the zoom lens is focused on an object at infinity is set to HD1,

[0018] The condition (3) expressed as follows is satisfied:

[0019] 1.4<HD1 / f1<2.16 (3).

[0020] According to the sixth embodiment of the present invention, in the zoom lens of the first embodiment, the first lens group includes, from the object side to the image side, sub-group 1a, sub-group 1b and sub-group 1c. When focusing, the interval between sub-group 1a and sub-group 1b changes, and the interval between sub-group 1b and sub-group 1c changes.

[0021] A seventh aspect of the present invention is the zoom lens according to the sixth aspect, wherein when the focal length of the 1b sub-group is set to f1b,

[0022] The condition (4) expressed as follows is satisfied:

[0023] 0.3<f1 / f1b<1 (4).

[0024] An eighth aspect of the present invention is the zoom lens according to the sixth aspect, wherein the lens closest to the image side in the 1a sub-group is a negative lens.

[0025] A ninth aspect of the present invention is the zoom lens according to the eighth aspect, wherein a positive lens is arranged adjacent to the object side of the negative lens closest to the image side in the 1a sub-group.

[0026] A tenth aspect of the present invention is the zoom lens according to the sixth aspect, wherein the 1a sub-group has negative refractive power.

[0027] An eleventh aspect of the present invention is the zoom lens according to the sixth aspect, wherein the 1b-th sub-group has positive refractive power.

[0028] A twelfth aspect of the present invention is the zoom lens according to the sixth aspect, wherein the 1c-th sub-group has positive refractive power.

[0029] A thirteenth aspect of the present invention is the zoom lens of the sixth aspect, wherein when focusing from an object at infinity to a closest object, the sub-group 1a and the sub-group 1c are fixed relative to the image plane, and the sub-group 1b moves toward the image side.

[0030] A fourteenth aspect of the present invention is the zoom lens according to the first aspect, wherein the first lens group is fixed relative to the image plane during zooming.

[0031] A fifteenth aspect of the present invention is the zoom lens according to the first aspect, wherein the final lens group is fixed relative to the image plane during zooming.

[0032] A sixteenth aspect of the present invention is the zoom lens according to the first aspect, wherein the first lens group includes six or more lenses.

[0033] A seventeenth aspect of the present invention is the zoom lens according to the first aspect, further comprising an aperture stop, wherein the aperture stop is fixed relative to the image plane during zooming.

[0034] According to an eighteenth aspect of the present invention, in the zoom lens according to the first aspect, conditional expression (5) expressed as follows is satisfied:

[0035] 0.7<H1r / f1<1.5 (5).

[0036] Here, the distance on the optical axis from the lens surface closest to the image side of the first lens group to the image-side principal point position of the first lens group when the lens surface closest to the image side is in focus is denoted as H1r. The sign of H1r is negative on the object side and positive on the image side, with the lens surface closest to the image side of the first lens group as reference.

[0037] According to a nineteenth aspect of the present invention, in the zoom lens of the first aspect, conditional expression (6) represented by the following equation is satisfied:

[0038] 0.7<H1f / f1<2 (6).

[0039] Here, the distance on the optical axis from the lens surface of the first lens group closest to the object to the object-side principal point of the first lens group, when the lens is focused on an object at infinity, is denoted as H1f. The sign of H1f is negative on the object side and positive on the image side, with the lens surface of the first lens group closest to the object as the reference.

[0040] According to a 20th aspect of the present invention, in the zoom lens according to the 3rd aspect, when the refractive index of the L1p lens with respect to the d-line is N1p,

[0041] The condition (7) expressed as follows is satisfied:

[0042] 1.7<N1p<2.1 (7).

[0043] According to a twenty-first aspect of the present invention, in the zoom lens according to the third aspect, when the Abbe number based on the d-line of the L1p lens is v1p,

[0044] The condition (8) expressed as follows is satisfied:

[0045] 15<v 1p<30 (8).

[0046] According to a twenty-second aspect of the present invention, in the zoom lens according to the third aspect, when the refractive index of the L1n lens with respect to the d-line is N1n,

[0047] The condition (9) expressed as follows is satisfied:

[0048] 1.43<N1n<1.85 (9).

[0049] According to a twenty-third aspect of the present invention, in the zoom lens according to the third aspect, when the Abbe number based on the d-line of the L1n lens is denoted as v1n,

[0050] The condition (10) expressed as follows is satisfied:

[0051] 30<v 1n<60 (10).

[0052] According to a twenty-fourth aspect of the present invention, in the zoom lens according to the third aspect, when the average value of the Abbe numbers of all the negative lenses on the object side of the lens L1p based on the d-line is denoted as v 1nave,

[0053] The condition (11) expressed as follows is satisfied:

[0054] 35<v 1nave<60 (11).

[0055] According to a twenty-fifth aspect of the present invention, in the zoom lens according to the third aspect, when the average value of the partial dispersion ratios between the g-line and the F-line of all the negative lenses on the object side of the L1p lens is denoted as θ1nave,

[0056] The condition (12) expressed as follows is satisfied:

[0057] 0.5<01nave<0.6 (12).

[0058] According to a twenty-sixth aspect of the present invention, in the zoom lens of the first aspect, 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 object at infinity at the wide-angle end,

[0059] The condition (13) expressed as follows is satisfied:

[0060] 2<Denw / fw<3.5 (13).

[0061] The 27th aspect of the present invention is the zoom lens according to the 6th aspect, wherein when the focal length of the 1a sub-group is set to f1a,

[0062] The condition (14) expressed as follows is satisfied:

[0063] -2<f1 / f1a<0 (14).

[0064] The 28th aspect of the present invention is the zoom lens according to the 6th aspect, wherein when the focal length of the 1c sub-group is set to f1c,

[0065] The condition (15) expressed as follows is satisfied:

[0066] 0.3<f1 / f1c<0.8 (15).

[0067] According to a twenty-ninth aspect of the present invention, in the zoom lens of the first aspect, when the paraxial curvature radius of the image-side surface of the lens closest to the object side in the first lens group is set to R2,

[0068] When the paraxial curvature radius of the object-side surface of the second lens from the object side of the first lens group is R3,

[0069] The condition (16) expressed as follows is satisfied:

[0070] -3<(R2-R3) / (R2+R3)<0 (16)

[0071] The 30th embodiment of the present invention is a zoom lens of the first embodiment, in a state where the longest air gap among the air gaps on the optical axis included in the final lens group is set to the longest air gap in a state where the longest air gap is focused on an object at infinity at the wide-angle end, an EX group is arranged in a manner that can be inserted or removed, and the EX group is inserted into the optical path of the longest air gap to change the focal length of the zoom lens while keeping the imaging position constant.

[0072] The 31st aspect of the present invention is the zoom lens according to the 30th aspect, wherein the maximum image height is changed by inserting or removing the EX group.

[0073] According to a thirty-second aspect of the present invention, in the zoom lens of the first aspect, conditional expression (17) represented by the following equation is satisfied:

[0074] 0.03<d1R / IHw<0.097 (17).

[0075] Here, the distance on the optical axis from the lens surface closest to the image side of the first lens group to the lens surface adjacent to the image side of the lens surface closest to the image side of the first lens group, when the lens is in focus on an object at infinity at the wide-angle end, is d1R. The maximum image height when the lens is in focus on an object at infinity at the wide-angle end is IHw.

[0076] A thirty-third aspect of the present invention is an imaging device including the zoom lens according to any one of the first to thirty-second aspects.

[0077] In addition, the terms "including..." and "consisting of..." in this specification mean that in addition to the listed constituent elements, the device may also include optical elements other than lenses, such as lenses that do not essentially have optical power, apertures, filters, and cover glasses, as well as mechanical parts such as lens flanges, lens barrels, imaging elements, and hand-shake correction mechanisms.

[0078] In this specification, "a group having positive optical power" and "a group having positive optical power" mean that the group as a whole has positive optical power. Similarly, "a group having negative optical power" and "a group having negative optical power" mean that the group as a whole has negative optical power. "Lens having negative optical power" and "negative lens" have the same meaning. In this specification, "a lens group" and "focusing group" are not limited to structures including multiple lenses and can also be set to a structure including only a single lens.

[0079] A composite aspheric lens (a lens (e.g., a spherical lens) and an aspheric film formed on the lens are integrally formed, functioning as a single aspheric lens as a whole) is considered a single lens, not a cemented lens. Unless otherwise specified, the radius of curvature, the sign of the optical power, and the surface shape associated with a lens including an aspheric surface use the radius of curvature, the sign of the optical power, and the surface shape of the paraxial region. The sign of the radius of curvature is positive for the surface convex toward the object side, and negative for the surface convex toward the image side.

[0080] In this specification, the term "entire system" refers to the zoom lens. The "back focal length in air-converted distance" is the air-converted distance on the optical axis from the lens surface closest to the image side of the zoom lens to the image plane. The "focal length" used in conditional expressions refers to the paraxial focal length. Unless otherwise specified, the "distance on the optical axis" used in conditional expressions refers to the geometric distance. Unless otherwise specified, the values ​​used in conditional expressions are based on the d-line when focusing on an object at infinity.

[0081] 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 587.56 nm (nanometers), the wavelength of the C-line is considered to be 656.27 nm (nanometers), the wavelength of the F-line is considered to be 486.13 nm (nanometers), and the wavelength of the g-line is considered to be 435.84 nm (nanometers).

[0082] Effects of the Invention

[0083] According to the present invention, it is possible to provide a zoom lens having a large image circle and a wide angle, a compact structure, and excellent optical performance, and an imaging device including the zoom lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Figure 1 1 and 2 are cross-sectional views showing the structure of a zoom lens according to one embodiment, which corresponds to the zoom lens of Example 1, and diagrams showing movement loci.

[0085] Figure 2 yes Figure 1 1 is a cross-sectional view of the structure of the first lens unit of the zoom lens and is a diagram for explaining symbols of conditional expressions.

[0086] Figure 3 yes Figure 1 1 is a sectional view of the structure of the zoom lens in the telephoto end state, and is a diagram for explaining symbols of conditional expressions.

[0087] Figure 4 It means in Figure 11 and 2 are diagrams showing insertion or removal of the EX group in the wide-angle end state of the zoom lens, and are diagrams for explaining symbols of conditional expressions.

[0088] Figure 5 This is a diagram for explaining the effective radius.

[0089] Figure 6 This is a cross-sectional view showing the structure of the zoom lens of Example 1-1.

[0090] Figure 7 These are diagrams showing various aberrations of the zoom lens of Example 1.

[0091] Figure 8 These are diagrams showing various aberrations of the zoom lens of Example 1-1.

[0092] Figure 9 It is a cross-sectional view showing the structure of the zoom lens of Example 2 and a diagram showing a movement trajectory.

[0093] Figure 10 These are diagrams showing various aberrations of the zoom lens of Example 2.

[0094] Figure 11 This is a cross-sectional view showing the structure of the zoom lens of Example 2-1 in the wide-angle end state.

[0095] Figure 12 These are diagrams showing various aberrations of the zoom lens of Example 2-1.

[0096] Figure 13 It is a cross-sectional view showing the structure of the zoom lens of Example 3 and a diagram showing a movement trajectory.

[0097] Figure 14 These are diagrams showing various aberrations of the zoom lens of Example 3.

[0098] Figure 15 This is a cross-sectional view showing the structure of the zoom lens of Example 3-1 in the wide-angle end state.

[0099] Figure 16 These are diagrams showing various aberrations of the zoom lens of Example 3-1.

[0100] Figure 17 It is a cross-sectional view showing the structure of the zoom lens of Example 4 and a diagram showing a movement trajectory.

[0101] Figure 18 These are diagrams showing various aberrations of the zoom lens of Example 4.

[0102] Figure 19 It is a cross-sectional view showing the structure of the zoom lens of Example 4-1 in the wide-angle end state.

[0103] Figure 20 These are diagrams showing various aberrations of the zoom lens of Example 4-1.

[0104] Figure 21 It is a cross-sectional view showing the structure of the zoom lens of Example 5 and a diagram showing a movement trajectory.

[0105] Figure 22 These are diagrams showing various aberrations of the zoom lens of Example 5.

[0106] Figure 23 This is a cross-sectional view showing the structure of the zoom lens of Example 5-1 in the wide-angle end state.

[0107] Figure 24 These are diagrams showing various aberrations of the zoom lens of Example 5-1.

[0108] Figure 25 It is a cross-sectional view showing the structure of the zoom lens of Example 6 and a diagram showing a movement trajectory.

[0109] Figure 26 These are diagrams showing various aberrations of the zoom lens of Example 6.

[0110] Figure 27 This is a cross-sectional view showing the structure of the zoom lens of Example 6-1 in the wide-angle end state.

[0111] Figure 28 These are diagrams showing various aberrations of the zoom lens of Example 6-1.

[0112] Figure 29 It is a cross-sectional view showing the structure of the zoom lens of Example 7 and a diagram showing a movement trajectory.

[0113] Figure 30 These are diagrams showing various aberrations of the zoom lens of Example 7.

[0114] Figure 31 This is a cross-sectional view showing the structure of the zoom lens of Example 7-1 in the wide-angle end state.

[0115] Figure 32 These are diagrams showing various aberrations of the zoom lens of Example 7-1.

[0116] Figure 33 It is a cross-sectional view showing the structure of the zoom lens of Example 8 and a diagram showing a movement trajectory.

[0117] Figure 34 These are diagrams showing various aberrations of the zoom lens of Example 8.

[0118] Figure 35 This is a cross-sectional view showing the structure of the zoom lens of Example 8-1 in the wide-angle end state.

[0119] Figure 36 These are diagrams showing various aberrations of the zoom lens of Example 8-1.

[0120] Figure 37 It is a cross-sectional view showing the structure of the zoom lens of Example 9 and a diagram showing a movement trajectory.

[0121] Figure 38 These are diagrams showing various aberrations of the zoom lens of Example 9.

[0122] Figure 39 This is a cross-sectional view showing the structure of the zoom lens of Example 9-1 in the wide-angle end state.

[0123] Figure 40 These are diagrams showing various aberrations of the zoom lens of Example 9-1.

[0124] Figure 41 It is a cross-sectional view showing the structure of the zoom lens of Example 10 and a diagram showing a movement trajectory.

[0125] Figure 42 These are diagrams showing various aberrations of the zoom lens of Example 10.

[0126] Figure 43 This is a cross-sectional view showing the structure of the zoom lens of Example 10-1 in the wide-angle end state.

[0127] Figure 44 These are diagrams showing various aberrations of the zoom lens of Example 10-1.

[0128] Figure 45 This is a schematic diagram of the configuration of an imaging device according to one embodiment.

[0129] Explanation of symbols

[0130] 1-zoom lens, 2-filter, 3-imaging element, 4-signal processing unit, 5-magnification control unit, 6-focus control unit, 100-camera device, D1a-thickness, D1b-thickness, D1c-thickness, d1R-distance, DAmax-longest air interval, Dent-distance, Denw-distance, DEX-thickness, Dexw-distance, DG1-thickness, Er-effective radius, ErL1-effective radius, EX-EX group, G1-1st lens group, G1a-1a sub-group, G1b-1b sub-group, G1c-1c sub-group, G2-2nd lens group, G3-3rd lens group, GE-final lens group, GEE-final lens group, GM-middle group, GN-N lens group, GP-P lens group, H1 f-distance, H1r-distance, HD1-interval, Hft-distance, IHEw-maximum image height, IHw-maximum image height, L11~L19-lens, Lx-lens, Pent-paraxial entrance pupil position, Penw-paraxial entrance pupil position, Pexw-paraxial exit pupil position, PH1f-object side principal point position, PH1r-image side principal point position, PHft-object side principal point position, PP-optical component, Px-position, Sim-image plane, St-aperture stop, tL1-center thickness, UN-negative group, Xa-on-axis beam, Xb-off-axis beam, Xb1-ray, Z-optical axis, ωExt-maximum half field of view angle, ωEXw-maximum half field of view angle, ωt-maximum half field of view angle, ωw-maximum half field of view angle. DETAILED DESCRIPTION

[0131] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0132] Figure 1 The structure of the zoom lens according to one embodiment of the present invention and a cross-sectional view and movement trajectory of a light beam are shown in FIG. Figure 1 In the figure, the state of focusing on an object at infinity is shown, with the left side being the object side and the right side being the image side. Figure 1 In FIG, the upper section marked with "Wide" shows the wide-angle end state, and the lower section marked with "Tele" shows the telephoto end state. Figure 1 In FIG. 1 , as light beams, an axial light beam and a light beam with a maximum half-viewing angle ωw at a wide-angle end, and an axial light beam and a light beam with a maximum half-viewing angle ωt at a telephoto end are shown. Figure 1 The example shown in corresponds to the zoom lens of Example 1 described later.

[0133] exist Figure 1, an example is shown in which a zoom lens is used in an imaging device, and a parallel flat-plate optical component PP is disposed between the zoom lens and the image plane Sim. Optical component PP is assumed to be various optical filters and / or cover glass. Various optical filters include low-pass filters, infrared cutoff filters, and / or filters that cut off specific wavelength regions. Optical component PP does not have optical power. The imaging device can also be configured without optical component PP.

[0134] The zoom lens of the present invention comprises: a first lens group G1, which is arranged closest to the object side and has positive optical power; an intermediate group GM, which includes a plurality of lens groups; and a final lens group GE, which is arranged closest to the image side. When zooming, all intervals between adjacent lens groups change. The first lens group G1 includes two negative lenses in sequence from the closest to the object side to the image side. The object-side negative lens of the two negative lenses of the first lens group G1 is a negative meniscus lens with its convex surface facing the object side. The above structure can achieve a wider image circle while maintaining the zoom ratio, and is conducive to miniaturization while ensuring a wider field of view.

[0135] The middle group GM may be configured to include at least one of the negative group UN, the N lens group GN, and the P lens group GP described below.

[0136] The negative group UN is arranged adjacent to the image side of the first lens group G1 and is composed of two or less lens groups, with a total negative refractive power. The negative group UN is arranged to improve the zoom ratio.

[0137] The N lens group GN is a lens group with negative refractive power and is arranged closer to the image side than the negative lens group UN. This N lens group GN is advantageous for achieving both wide angles and compactness.

[0138] The P lens group GP is a lens group with positive refractive power, which is arranged closer to the image side than the negative lens group UN and closer to the object side than the final lens group GE. This P lens group GP is helpful in suppressing aberration fluctuations during zooming.

[0139] As an example, Figure 1 The middle group GM includes a negative group UN, an N lens group GN and a P lens group GP in order from the object side to the image side.

[0140] exist Figure 1 In the example of , when zooming, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative lens group UN, the N lens group GN and the P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z. Figure 1In FIG. 1 , the solid arrows between the upper and lower sections show rough movement trajectories of the lens groups that move when zooming from the wide-angle end to the telephoto end.

[0141] In addition, in this specification, a group whose interval in the optical axis direction changes with adjacent groups when the magnification is changed is referred to as a lens group. When the magnification is changed, the interval between adjacent lenses in a lens group does not change. The "first lens group G1", each "lens group" included in the intermediate group GM, "N lens group GN", "P lens group GP", and "final lens group GE" in this specification are components of the zoom lens, and are parts that include at least one lens, and the at least one lens is divided by the air gap that changes when the magnification is changed. When the magnification is changed, each lens group is moved or fixed as a unit, and the interval between the lenses in each lens group does not change. In addition, the "lens group" may also include components other than lenses that do not have optical focal length, for example, aperture stop St, etc.

[0142] In the zoom lens of the present invention, it is preferable that the first lens group G1 is fixed relative to the image plane Sim during zooming. With such a configuration, it is possible to suppress movement of the center of gravity during zooming.

[0143] The first lens group G1 preferably includes six or more lenses. This configuration is advantageous in suppressing aberrations. To further suppress aberrations, the first lens group G1 preferably includes eight or more lenses. For example, a configuration in which the first lens group G1 consists of nine lenses further improves aberration suppression.

[0144] A negative lens is preferably disposed adjacent to the image side of the positive lens closest to the object in the first lens group G1. This configuration reduces the optical power of the image-side negative lens in the first lens group G1, contributing to weight reduction and facilitating correction of axial chromatic aberration at the telephoto end.

[0145] Hereinafter, the positive lens closest to the object among the positive lenses included in the first lens group G1 is referred to as an L1p lens, and the negative lens disposed adjacent to the image side of the L1p lens is referred to as an L1n lens. Figure 2 Shown in Figure 1 The first lens group G1 of the zoom lens. Figure 2 The first lens group G1 includes lenses L11 to L19 in order from the object side to the image side. Figure 2 In the example, lens L13 corresponds to lens L1p, and lens L14 corresponds to lens L1n.

[0146] The image-side surface of the L1n lens is preferably concave. This configuration is advantageous in suppressing fluctuations in astigmatism during focusing.

[0147] The first lens group G1 can be constructed to include, from the object side to the image side, sub-group 1a G1a, sub-group 1b G1b, and sub-group 1c G1c. During focusing, the spacing between sub-group 1a G1a and sub-group 1b G1b changes, and the spacing between sub-group 1b G1b and sub-group 1c G1c changes. This configuration facilitates a simplified drive mechanism and suppresses aberration fluctuations during focusing.

[0148] As an example, in Figure 2 In the example, the 1a subgroup G1a includes lenses L11 to L14 in order from the object side to the image side, the 1b subgroup G1b includes lens L15, and the 1c subgroup G1c includes lenses L16 to L19 in order from the object side to the image side.

[0149] When focusing from an object at infinity to the closest object, the 1a subgroup G1a and the 1c subgroup G1c can be fixed relative to the image plane Sim, while the 1b subgroup G1b moves toward the image. This configuration can reduce the amount of movement of the 1b subgroup G1b during focusing.

[0150] Hereinafter, the group that moves along the optical axis Z when focusing is performed is referred to as a focus group. Focusing is performed by moving the focus group. Figure 1 In the example of , the focus group consists of the 1b subgroup G1b. Figure 1 In the figure below, the arrows indicating the direction of movement when focusing from an object at infinity to the closest object are written in the lower part of the focus group. The focus group functions in the entire zoom range including the wide-angle end state, but Figure 1 In order to avoid complicating the diagram, the above-mentioned arrows are only included in the diagram in the lower section.

[0151] Subgroup 1a G1a preferably has negative refractive power. This configuration facilitates widening of the angle of view. Subgroup 1b G1b preferably has positive refractive power. This configuration reduces the amount of movement of the group during focusing. Subgroup 1c G1c preferably has positive refractive power. This configuration facilitates suppressing spherical aberration.

[0152] The 1a-th sub-group G1a may be configured to include the L1p lens. This configuration is advantageous in suppressing chromatic aberration of magnification.

[0153] The 1a-subgroup G1a may include only one positive lens. This configuration facilitates weight reduction of the 1a-subgroup G1a. If the 1a-subgroup G1a includes only one positive lens, the positive lens may be an L1p lens.

[0154] The lens closest to the image side of sub-group 1a G1a is a negative lens, which can be configured as an L1n lens. This configuration reduces the refractive power of the image-side negative lens within first lens group G1, contributing to weight reduction, correction of axial chromatic aberration at the telephoto end, and suppression of aberration fluctuations during focusing.

[0155] If the lens closest to the image side of sub-group 1a G1a is a negative lens, a positive lens is preferably provided adjacent to the object side of the negative lens. More specifically, sub-group 1a G1a preferably includes lens L1n and lens L1p in a continuous sequence from the object side toward the image side. This configuration is advantageous in suppressing chromatic aberration fluctuations during focusing.

[0156] It is preferable that the 1a sub-group G1a has at least one aspherical lens surface. This configuration is advantageous in suppressing distortion.

[0157] The 1b-th sub-group G1b preferably includes a positive lens. This configuration is advantageous in suppressing fluctuations in spherical aberration during focusing.

[0158] The 1b-th sub-group G1b may be composed of only one positive lens. This configuration is advantageous in reducing the weight of the focusing group.

[0159] The positive lens included in the 1b-th sub-group G1b preferably has at least one aspherical lens surface. This configuration is advantageous in suppressing fluctuations in field curvature during focusing.

[0160] The 1c-th sub-group G1c preferably includes three or more positive lenses. This configuration is advantageous in suppressing longitudinal chromatic aberration.

[0161] The 1c-th subgroup G1c preferably has at least one aspherical lens surface. This configuration is advantageous in suppressing spherical aberration.

[0162] When zooming, the final lens group GE is preferably fixed relative to the image plane Sim. In such a configuration, it is easy to suppress the change of the F value when zooming.

[0163] The lens closest to the image side of the final lens group GE is preferably a positive lens. In such a configuration, a lens system with a smaller F value can be easily obtained.

[0164] The zoom lens of the present invention preferably includes an aperture stop St fixed relative to the image plane Sim when the zoom is performed. In the case of such a configuration, the mechanical structure can be simplified, which is conducive to weight reduction. Figure 1 In the example of , an aperture stop St is arranged on the object side of the final lens group GE.

[0165] Next, we describe preferred and achievable configurations related to the conditional expressions of the zoom lens of the present invention. In the following description of the conditional expressions, identical reference numerals are used for identically defined elements, and duplicate descriptions of some reference numerals are omitted. Furthermore, to avoid redundant descriptions, the "zoom lens of the present invention" will be referred to simply as the "zoom lens."

[0166] The zoom lens preferably satisfies the following conditional expression (1). The focal length of the entire system when focused on an object at infinity at the wide-angle end is set to fw. The focal length of the first lens group G1 is set to f1. By preventing the corresponding value of conditional expression (1) from reaching below the lower limit, the optical power of the first lens group G1 can be enhanced, thereby facilitating a reduction in the total length of the lens system. By preventing the corresponding value of conditional expression (1) from reaching above the upper limit, the optical power of the first lens group G1 does not become excessively strong, thereby facilitating a wide angle while suppressing aberrations.

[0167] 0.1<fw / f1<0.8 (1)

[0168] In order to obtain better characteristics, the lower limit value of conditional expression (1) is more preferably set to 0.15, further preferably to 0.2, further preferably to 0.23, and further preferably to 0.25. In order to obtain better characteristics, the upper limit value of conditional expression (1) is more preferably set to 0.5, further preferably to 0.45, further preferably to 0.42, and further preferably to 0.4.

[0169] The zoom lens preferably satisfies the following conditional expression (2). Herein, the distance on the optical axis from the lens surface closest to the object side of the first lens group G1 in a state in which the object at infinity is focused to the object-side principal point position PH1f of the first lens group G1 is set to H1f. The distance on the optical axis from the lens surface closest to the object side of the first lens group G1 in a state in which the object at infinity is focused to the object at the telephoto end to the object-side principal point position PHft of the entire system is set to Hft. Regarding the signs of H1f and Hft, with the lens surface closest to the object side of the first lens group G1 as a reference, the object side is set to negative and the image side is set to positive. As an example, Figure 2 , the object side principal point position PH1f of the first lens group G1 and the above distance H1f are shown. Figure 3 Shown in Figure 1 As an example, the telephoto end state of the zoom lens Figure 3 The object-side principal point position PHft and the aforementioned distance Hft for the entire system are shown in FIG. Preventing the corresponding value of conditional expression (2) from falling below the lower limit helps suppress various aberrations associated with off-axis rays. Preventing the corresponding value of conditional expression (2) from exceeding the upper limit helps shorten the overall length of the lens system while maintaining the zoom ratio.

[0170] 0.1<H1f / Hft<0.95 (2)

[0171] To obtain even better characteristics, the lower limit of conditional expression (2) is more preferably set to 0.28, further preferably to 0.3, further preferably to 0.33, and further preferably to 0.37. To obtain even better characteristics, the upper limit of conditional expression (2) is more preferably set to 0.7, further preferably to 0.6, and further preferably to 0.5. For example, it is more preferable that the zoom lens satisfies the following conditional expression (2-1).

[0172] 0.28<H1f / Hft<0.7 (2-1)

[0173] The zoom lens preferably satisfies the following conditional expression (3). In this case, the distance on the optical axis between the object-side principal point position PH1f of the first lens group G1 and the image-side principal point position PH1r of the first lens group G1 in a state where the lens is focused on an object at infinity is set to HD1. As an example, Figure 2 The image-side principal point position PH1r of the first lens group G1 and the aforementioned distance HD1 are shown in FIG. Preventing the corresponding value of conditional expression (3) from falling below the lower limit helps suppress aberration fluctuations during zooming. Preventing the corresponding value of conditional expression (3) from exceeding the upper limit facilitates shortening the total length of the first lens group G1, thereby contributing to weight reduction.

[0174] 1.4<HD1 / f1<2.16 (3)

[0175] To obtain better characteristics, the lower limit of conditional expression (3) is more preferably 1.5, and further preferably 1.6. To obtain better characteristics, the upper limit of conditional expression (3) is more preferably 2.15, further preferably 2.1, and further preferably 2.05.

[0176] The zoom lens preferably satisfies the following conditional expression (5). In this case, the distance on the optical axis from the lens surface closest to the image side of the first lens group G1 to the image side principal point position PH1r of the first lens group G1 in a state in which the lens surface closest to the image side is focused on an object at infinity is set as H1r. Regarding the sign of H1r, the object side is set as negative and the image side is set as positive, with the lens surface closest to the image side of the first lens group G1 as the reference. As an example, Figure 2 The distance H1r is shown in FIG. By preventing the corresponding value of conditional expression (5) from falling below the lower limit, various aberrations related to axial light can be suppressed. By preventing the corresponding value of conditional expression (5) from exceeding the upper limit, a high zoom ratio can be achieved.

[0177] 0.7<H1r / f1<1.5 (5)

[0178] To obtain better characteristics, the lower limit of conditional expression (5) is more preferably set to 0.75, further preferably to 0.8, and further preferably to 0.85. To obtain better characteristics, the upper limit of conditional expression (5) is more preferably set to 1.4, further preferably to 1.3, and further preferably to 1.25.

[0179] The zoom lens preferably satisfies the following conditional expression (6). Preventing the corresponding value of conditional expression (6) from falling below the lower limit value is advantageous in suppressing various aberrations associated with off-axis light. Preventing the corresponding value of conditional expression (6) from exceeding the upper limit value is advantageous in reducing the diameter of the first lens group G1 while maintaining a wide angle.

[0180] 0.7<H1f / f1<2 (6)

[0181] In order to obtain better characteristics, the lower limit value of conditional expression (6) is more preferably set to 0.8, further preferably to 0.9, and further preferably to 1. In order to obtain better characteristics, the upper limit value of conditional expression (6) is more preferably set to 1.7, further preferably to 1.6, and further preferably to 1.5.

[0182] When the refractive index of the L1p lens with respect to the d-line is set to N1p, the zoom lens preferably satisfies the following conditional expression (7). Preventing the corresponding value of conditional expression (7) from falling below the lower limit helps suppress fluctuations in spherical aberration during zooming. Preventing the corresponding value of conditional expression (7) from exceeding the upper limit widens the range of selectable Abbe numbers, thereby facilitating correction of axial chromatic aberration at the telephoto end.

[0183] 1.7<N1p<2.1 (7)

[0184] To obtain better characteristics, the lower limit of conditional expression (7) is more preferably 1.75, and further preferably 1.8. To obtain better characteristics, the upper limit of conditional expression (7) is more preferably 2.05, and further preferably 2.

[0185] When the Abbe number based on the d-line of the L1p lens is set to v1p, the zoom lens preferably satisfies the following conditional expression (8). Preventing the corresponding value of conditional expression (8) from falling below the lower limit is advantageous for suppressing lateral chromatic aberration at the wide-angle end. Preventing the corresponding value of conditional expression (8) from exceeding the upper limit is advantageous for correcting axial chromatic aberration at the telephoto end.

[0186] 15<v 1p<30 (8)

[0187] To obtain better characteristics, the lower limit of conditional expression (8) is more preferably set to 16, and further preferably to 17. To obtain better characteristics, the upper limit of conditional expression (8) is more preferably set to 28, further preferably to 25, and further preferably to 24.

[0188] When the refractive index of the L1n lens with respect to the d-line is set to N1n, the zoom lens preferably satisfies the following conditional expression (9). Preventing the corresponding value of conditional expression (9) from falling below the lower limit helps suppress fluctuations in spherical aberration during zooming. Preventing the corresponding value of conditional expression (9) from exceeding the upper limit widens the range of selectable Abbe numbers, thereby facilitating correction of axial chromatic aberration at the telephoto end.

[0189] 1.43<N1n<1.85 (9)

[0190] To obtain better characteristics, the lower limit of conditional expression (9) is more preferably 1.5, further preferably 1.55, and further preferably 1.6. To obtain better characteristics, the upper limit of conditional expression (9) is more preferably 1.8.

[0191] When the Abbe number based on the d-line of the L1n lens is set to v1n, the zoom lens preferably satisfies the following conditional expression (10). Preventing the corresponding value of conditional expression (10) from falling below the lower limit is advantageous for suppressing lateral chromatic aberration at the wide-angle end. Preventing the corresponding value of conditional expression (10) from exceeding the upper limit is advantageous for correcting axial chromatic aberration at the telephoto end.

[0192] 30<v1n<60(10)

[0193] To obtain better characteristics, the lower limit of conditional expression (10) is more preferably set to 35, further preferably to 37, and further preferably to 38. To obtain better characteristics, the upper limit of conditional expression (10) is more preferably set to 59, and further preferably to 58.5.

[0194] When the average value of the Abbe numbers of all negative lenses on the object side beyond the L1p lens, based on the d-line, is defined as v1nave, the zoom lens preferably satisfies the following conditional expression (11). Preventing the corresponding value of conditional expression (11) from falling below the lower limit is advantageous for suppressing lateral chromatic aberration at the wide-angle end. Preventing the corresponding value of conditional expression (11) from exceeding the upper limit is advantageous for correcting axial chromatic aberration at the telephoto end.

[0195] 35<v 1nave<60(11)

[0196] To obtain better characteristics, the lower limit of conditional expression (11) is more preferably 40, and further preferably 40.4. To obtain better characteristics, the upper limit of conditional expression (11) is more preferably 59, and further preferably 58.1.

[0197] When the average value of the partial dispersion ratio between the g-line and the F-line of all negative lenses on the object side beyond the L1p lens is set to 0.1nave, the zoom lens preferably satisfies the following conditional expression (12). By preventing the corresponding value of conditional expression (12) from falling below the lower limit, a material with a low specific gravity can be selected, thereby contributing to weight reduction. By preventing the corresponding value of conditional expression (12) from exceeding the upper limit, it is advantageous to suppress secondary lateral chromatic aberration.

[0198] 0.5<θ 1nave<0.6 (12)

[0199] In order to obtain better characteristics, the lower limit value of conditional expression (12) is more preferably set to 0.53, further preferably to 0.54, and further preferably to 0.55.

[0200] In addition, when the refractive indices of a certain lens with respect to the g-line, F-line, and C-line are respectively Ng, NF, and NC, and the partial dispersion ratio between the g-line and F-line of the lens is θg,F, θg,F is defined by the following formula.

[0201] θg,F=(Ng-NF) / (NF-NC)

[0202] The zoom lens preferably satisfies the following conditional expression (13): Denw is 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 when the lens is focused on an infinitely distant object at the wide-angle end. Figure 4Shown in Figure 1 As an example, the wide-angle end state of the zoom lens Figure 4 The paraxial entrance pupil position Penw and the distance Denw are shown in FIG. By preventing the corresponding value of conditional expression (13) from falling below the lower limit, the distance on the optical axis from the lens surface closest to the object side of the first lens group G1 to the paraxial entrance pupil position on the wide-angle side can be extended, thereby contributing to suppressing fluctuations in field curvature during zooming. By preventing the corresponding value of conditional expression (13) from falling above the upper limit, the distance on the optical axis from the lens surface closest to the object side of the first lens group G1 to the paraxial entrance pupil position on the wide-angle side can be shortened, thereby contributing to widening of the angle of view.

[0203] 2<Denw / fw<3.5 (13)

[0204] In order to obtain better characteristics, the lower limit value of conditional expression (13) is more preferably set to 2.1, further preferably to 2.2, and further preferably to 2.3. In order to obtain better characteristics, the upper limit value of conditional expression (13) is more preferably set to 3.3, further preferably to 3.2, and further preferably to 3.

[0205] The zoom lens preferably satisfies the following conditional expression (16). The paraxial curvature radius of the image-side surface of the lens closest to the object side of the first lens group G1 is set to R2. The paraxial curvature radius of the object-side surface of the second lens from the object side of the first lens group G1 is set to R3. By preventing the corresponding value of the conditional expression (16) from reaching below the lower limit value, the optical focal length of the air lens formed between the lens closest to the object side of the zoom lens and the second lens from the object side of the zoom lens can be shifted to a negative optical focal length, thereby facilitating suppression of distortion aberration. By preventing the corresponding value of the conditional expression (16) from reaching above the upper limit value, the absolute value of the curvature radius of the image-side surface of the lens closest to the object side of the zoom lens will not become too small, thereby facilitating suppression of ghosting.

[0206] -3<(R2-R3) / (R2+R3)<0 (16)

[0207] To obtain better characteristics, the lower limit of conditional expression (16) is more preferably -2.5, further preferably -2.7, and further preferably -2.8. To obtain better characteristics, the upper limit of conditional expression (16) is more preferably -0.5, and further preferably -1.

[0208] The zoom lens preferably satisfies the following conditional expression (17). Here, the distance on the optical axis from the lens surface closest to the image side of the first lens group G1 to the lens surface adjacent to the image side of the lens surface closest to the image side of the first lens group G1 when the lens is focused on an infinitely distant object at the wide-angle end is d1R. The maximum image height when the lens is focused on an infinitely distant object at the wide-angle end is IHw. As an example, Figure 4 The above distance d1R is shown in FIG. Figure 1 The maximum image height IHw is shown in FIG. By preventing the corresponding value of conditional expression (17) from falling below the lower limit, the configuration of the drive mechanism is facilitated. By preventing the corresponding value of conditional expression (17) from reaching above the upper limit, miniaturization and a high zoom ratio are facilitated.

[0209] 0.03<d1R / IHw<0.097 (17)

[0210] In order to obtain better characteristics, the lower limit of conditional expression (17) is more preferably set to 0.04, further preferably to 0.045, and further preferably to 0.052. In order to obtain better characteristics, the upper limit of conditional expression (17) is more preferably set to 0.092, further preferably to 0.085, and further preferably to 0.079.

[0211] The zoom lens preferably satisfies the following conditional expression (18). By preventing the corresponding value of conditional expression (18) from falling below the lower limit, the optical power of the first lens group G1 can be increased, thereby contributing to a reduction in the total length of the lens system. By preventing the corresponding value of conditional expression (18) from exceeding the upper limit, the entrance pupil position can be positioned closer to the object side, thereby contributing to a reduction in the diameter of the first lens group G1.

[0212] 0.5<Denw / f1<1.5 (18)

[0213] To obtain better characteristics, the lower limit of conditional expression (18) is more preferably set to 0.6, and further preferably to 0.7. To obtain better characteristics, the upper limit of conditional expression (18) is more preferably set to 1.4, further preferably to 1.3, and further preferably to 1.2.

[0214] The zoom lens preferably satisfies the following conditional expression (19). Here, 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 Pent when the lens is focused on an infinitely distant object at the telephoto end is set to Dent. As an example, Figure 3The paraxial entrance pupil position Pent and the distance Dent are shown in FIG. Preventing the corresponding value of conditional expression (19) from falling below the lower limit value is advantageous for suppressing various aberrations associated with off-axis rays at the telephoto end. Preventing the corresponding value of conditional expression (19) from exceeding the upper limit value is advantageous for suppressing various aberrations associated with on-axis rays at the telephoto end.

[0215] 1<Dent / f1<3 (19)

[0216] To obtain better characteristics, the lower limit of conditional expression (19) is more preferably 1.3, further preferably 1.5, and further preferably 1.7. To obtain better characteristics, the upper limit of conditional expression (19) is more preferably 2.5.

[0217] When the thickness of the first lens group G1 on the optical axis is set to DG1, the zoom lens preferably satisfies the following conditional expression (20). As an example, Figure 2 The thickness DG1 is shown in FIG. By preventing the corresponding value of the conditional expression (20) from falling below the lower limit, it is advantageous to correct various aberrations. By preventing the corresponding value of the conditional expression (20) from falling above the upper limit, it is advantageous to miniaturization.

[0218] 0.6<HD1 / DG1<1.5 (20)

[0219] In order to obtain better characteristics, the lower limit of conditional expression (20) is more preferably set to 0.65, further preferably to 0.7, and further preferably to 0.75. In order to obtain better characteristics, the upper limit of conditional expression (20) is more preferably set to 1.3, further preferably to 1.2, and further preferably to 1.1.

[0220] The zoom lens preferably satisfies the following conditional formula (21). In which, the F value in the state of focusing on an infinitely distant object at the telephoto end is set to FNot. The maximum half field angle in the state of focusing on an infinitely distant object at the telephoto end is set to ωt. The unit of ωt is degree. As an example, Figure 1 ωt is shown in the figure. By preventing the corresponding value of conditional expression (21) from falling below the lower limit, the barrel diameter does not become too large, which is conducive to miniaturization and weight reduction. By preventing the corresponding value of conditional expression (21) from exceeding the upper limit, it is advantageous to maintain a small F value at the telephoto end, thereby achieving a bright optical system.

[0221] 25<FNot×ωt<35(21)

[0222] In order to obtain better characteristics, the lower limit value of conditional expression (21) is more preferably set to 27, further preferably to 28, and further preferably to 29. In order to obtain better characteristics, the upper limit value of conditional expression (21) is more preferably set to 34, further preferably to 33, and further preferably to 32.

[0223] The zoom lens preferably satisfies the following conditional expression (22). By preventing the corresponding value of conditional expression (22) from falling below the lower limit, the distance on the optical axis from the lens surface closest to the object side of the first lens group G1 to the paraxial entrance pupil position on the wide-angle side can be extended, thereby facilitating suppression of fluctuations in field curvature during zooming. By preventing the corresponding value of conditional expression (22) from falling above the upper limit, the distance on the optical axis from the lens surface closest to the object side of the first lens group G1 to the paraxial entrance pupil position on the wide-angle side can be shortened, thereby facilitating widening of the angle of view.

[0224] 2<Denw / IHw<3.5 (22)

[0225] In order to obtain better characteristics, the lower limit of conditional expression (22) is more preferably set to 2.2, further preferably to 2.3, and further preferably to 2.4. In order to obtain better characteristics, the upper limit of conditional expression (22) is more preferably set to 3.4.

[0226] The zoom lens preferably satisfies the following conditional expression (23). Here, the back focal length at the air-converted distance when focusing on an object at infinity at the wide-angle end is set to Bfw. Preventing the corresponding value of conditional expression (23) from falling below the lower limit value facilitates securing peripheral light intensity. Preventing the corresponding value of conditional expression (23) from exceeding the upper limit value facilitates shortening the total length of the lens system.

[0227] 2<Bfw / IHw<3.5 (23)

[0228] In order to obtain better characteristics, the lower limit of conditional expression (23) is more preferably set to 2.2, further preferably to 2.3, and further preferably to 2.4. In order to obtain better characteristics, the upper limit of conditional expression (23) is more preferably set to 3.4.

[0229] 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 expression (24). The unit of ωw is degree. As an example, Figure 1 ωw is shown in FIG. Preventing the corresponding value of conditional expression (24) from falling below the lower limit value is advantageous for widening the angle of view. Preventing the corresponding value of conditional expression (24) from falling above the upper limit value is advantageous for miniaturization.

[0230] 40<ωw<55 (24)

[0231] In order to obtain better characteristics, the lower limit value of conditional expression (24) is more preferably set to 41, and further preferably to 42. In order to obtain better characteristics, the upper limit value of conditional expression (24) is more preferably set to 54, and further preferably to 53.

[0232] When the focal length of the entire system in a state where the zoom lens is focused on an object at infinity at the telephoto end is ft, the zoom lens preferably satisfies the following conditional expression (25). Preventing the corresponding value of conditional expression (25) from falling below the lower limit value helps suppress aberration fluctuations during zooming. Preventing the corresponding value of conditional expression (25) from reaching above the upper limit value helps achieve a high zoom ratio.

[0233] 0.1<fw / ft<0.3 (25)

[0234] In order to obtain better characteristics, the lower limit value of conditional expression (25) is more preferably set to 0.11, further preferably to 0.12, and further preferably to 0.13. In order to obtain better characteristics, the upper limit value of conditional expression (25) is more preferably set to 0.25, further preferably to 0.23, and further preferably to 0.21.

[0235] The zoom lens preferably satisfies the following conditional formula (26). The distance on the optical axis from the paraxial exit pupil position Pexw to the image plane Sim when the lens is focused on an infinitely distant object at the wide-angle end is set to Dexw. If an optical component without optical power is arranged between the paraxial exit pupil position and the image plane Sim, Dexw is calculated using the air-converted distance for the optical component. As an example, Figure 4 The paraxial exit pupil position Pexw is shown in FIG, and the distance Dexw is schematically shown in FIG. Figure 4 In FIG, a dotted line indicates a parallel flat plate-shaped optical component that does not have the optical power to be calculated using the air-converted distance. By preventing the corresponding value of conditional expression (26) from falling below the lower limit, the total length of the lens system can be shortened, thereby facilitating miniaturization. By preventing the corresponding value of conditional expression (26) from exceeding the upper limit, the angle of incidence of the off-axis principal ray on the image plane Sim can be reduced, thereby facilitating securing the amount of peripheral light.

[0236] 0.02<IHw / Dexw<0.2 (26)

[0237] In order to obtain better characteristics, the lower limit of conditional expression (26) is more preferably set to 0.025, further preferably to 0.03, and further preferably to 0.032. In order to obtain better characteristics, the upper limit of conditional expression (26) is more preferably set to 0.15, further preferably to 0.13, and further preferably to 0.11.

[0238] The zoom lens preferably satisfies the following conditional expression (31). Here, the center thickness of the lens closest to the object side of the first lens group G1 is set to tL1. The effective radius of the object side surface of the lens closest to the object side of the first lens group G1 is set to ErL1. As an example, Figure 2 The center thickness tL1 and the effective radius ErL1 are shown in FIG. Preventing the corresponding value of conditional expression (31) from falling below the lower limit value contributes to improving the robustness of the lens closest to the object side of the first lens group G1. Preventing the corresponding value of conditional expression (31) from exceeding the upper limit value contributes to weight reduction.

[0239] 0.015<tL1 / ErL1<0.1 (31)

[0240] In order to obtain better characteristics, the lower limit of conditional expression (31) is more preferably set to 0.02, further preferably to 0.025, and further preferably to 0.03. In order to obtain better characteristics, the upper limit of conditional expression (31) is more preferably set to 0.09, and further preferably to 0.08.

[0241] Here, reference Figure 5 , explain the “effective radius”. Figure 5 is a diagram for illustration. Figure 5 In the image, the left side is the object side and the right side is the image side. Figure 5 In FIG, the on-axis beam Xa and the off-axis beam Xb passing through the lens Lx are shown. Figure 5 In the example, the upper ray of the off-axis beam Xb, that is, the ray Xb1, is the ray that passes through the outermost side. The "outer side" 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. The position of the intersection of the ray passing through the outermost side and the lens surface is the position of the maximum effective diameter Px. Then, the distance from the position of the maximum effective diameter Px to the optical axis Z is the effective radius Er of the object side surface of the lens Lx. In addition, Figure 5 In the example of FIG, 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 differs depending on the lens system.

[0242] In a structure in which the first lens group G1 is composed of the above-mentioned 1a subgroup G1a, 1b subgroup G1b and 1c subgroup G1c, and when focusing is performed, the distance between the 1a subgroup G1a and the 1b subgroup G1b changes, and the distance between the 1b subgroup G1b and the 1c subgroup G1c changes, the zoom lens preferably satisfies at least one of the following conditional expressions (4), (14), (15), (28), (29) and (30).

[0243] In the following conditional expression (4), the focal length of the 1b-th subgroup G1b is set to f1b. Preventing the corresponding value of conditional expression (4) from falling below the lower limit reduces the amount of movement of the group during focusing, thereby contributing to miniaturization. Preventing the corresponding value of conditional expression (4) from exceeding the upper limit contributes to suppressing fluctuations in spherical aberration during focusing.

[0244] 0.3<f1 / f1b<1 (4)

[0245] To obtain better characteristics, the lower limit of conditional expression (4) is more preferably 0.35, and further preferably 0.4. To obtain better characteristics, the upper limit of conditional expression (4) is more preferably 0.8, further preferably 0.7, and further preferably 0.65.

[0246] In the following conditional expression (14), the focal length of the 1a-subgroup G1a is set to f1a. By preventing the corresponding value of conditional expression (14) from falling below the lower limit, the divergence of the on-axis light beam based on the 1a-subgroup G1a can be reduced, thereby facilitating a reduction in the diameter of the 1b-subgroup G1b. By preventing the corresponding value of conditional expression (14) from exceeding the upper limit, the negative focal power of the 1a-subgroup G1a can be enhanced. Consequently, the positive focal power on the image side is enhanced by the 1b-subgroup G1b and the 1b-subgroup G1b, thereby reducing the amount of separation change during focusing, thereby facilitating a reduction in the overall length of the lens system.

[0247] -2<f1 / f1a<0 (14)

[0248] To obtain better characteristics, the lower limit of conditional expression (14) is more preferably -1.8, and further preferably -1.7. To obtain better characteristics, the upper limit of conditional expression (14) is more preferably -0.5, further preferably -0.7, and further preferably -1.

[0249] In the following conditional expression (15), the focal length of the 1c-th sub-group G1c is set to f1c. Preventing the corresponding value of conditional expression (15) from falling below the lower limit facilitates shortening the total length of the first lens group G1. Preventing the corresponding value of conditional expression (15) from exceeding the upper limit facilitates suppressing various aberrations at the telephoto end.

[0250] 0.3<f1 / f1c<0.8 (15)

[0251] To obtain better characteristics, the lower limit of conditional expression (15) is more preferably set to 0.4, further preferably to 0.5, and further preferably to 0.55. To obtain better characteristics, the upper limit of conditional expression (15) is more preferably set to 0.75, and further preferably to 0.7.

[0252] In the following conditional expression (28), the thickness of the 1a-th subgroup G1a on the optical axis is set to D1a. As an example, Figure 2 The thickness D1a is shown in FIG. By preventing the corresponding value of conditional expression (28) from falling below the lower limit, it is advantageous to suppress the aberration variation when the on-axis light beam at the telephoto end is focused. By preventing the corresponding value of conditional expression (28) from falling above the upper limit, it is advantageous to reduce weight.

[0253] 0.2<D1a / DG1<0.7 (28)

[0254] In order to obtain better characteristics, the lower limit value of conditional expression (28) is more preferably set to 0.3, further preferably to 0.35, and further preferably to 0.4. In order to obtain better characteristics, the upper limit value of conditional expression (28) is more preferably set to 0.65, further preferably to 0.6, and further preferably to 0.55.

[0255] In the following conditional expression (29), the thickness of the 1b-th subgroup G1b on the optical axis is set to D1b. As an example, Figure 2 The thickness D1b is shown in FIG. By preventing the corresponding value of conditional expression (29) from reaching below the lower limit, it is advantageous to suppress the variation of spherical aberration during focusing. By preventing the corresponding value of conditional expression (29) from reaching above the upper limit, it is advantageous to reduce weight.

[0256] 0.05<D1b / DG1<0.2 (29)

[0257] In order to obtain better characteristics, the lower limit of conditional expression (29) is more preferably set to 0.06, further preferably to 0.07, and further preferably to 0.09. In order to obtain better characteristics, the upper limit of conditional expression (29) is more preferably set to 0.15, further preferably to 0.13, and further preferably to 0.12.

[0258] In the following conditional expression (30), the thickness of the 1c-th subgroup G1c on the optical axis is set to D1c. As an example, Figure 2The thickness D1c is shown in FIG. By preventing the corresponding value of conditional expression (30) from reaching below the lower limit, it is advantageous to suppress the variation of spherical aberration during focusing. By preventing the corresponding value of conditional expression (30) from reaching above the upper limit, it is advantageous to reduce weight.

[0259] 0.2<D1c / DG1<0.7 (30)

[0260] In order to obtain better characteristics, the lower limit value of the conditional expression (30) is more preferably set to 0.3. In order to obtain better characteristics, the upper limit value of the conditional expression (30) is more preferably set to 0.6, further preferably to 0.5, and further preferably to 0.4.

[0261] In a zoom lens structure including the aforementioned N lens group GN, the zoom lens preferably satisfies the following conditional expression (36). Here, the focal length of the N lens group GN is set to fN. By preventing the corresponding value of conditional expression (36) from falling below the lower limit, the optical power of the first lens group G1 can be suppressed, thereby facilitating suppression of aberration fluctuations during zooming. By preventing the corresponding value of conditional expression (36) from reaching above the upper limit, the optical power of the N lens group GN can be suppressed, thereby facilitating suppression of aberration fluctuations during zooming.

[0262] -2.3<fN / f1<-0.6 (36)

[0263] In order to obtain better characteristics, the lower limit of conditional expression (36) is more preferably set to -2.1, further preferably to -1.95, and further preferably to -1.84. In order to obtain better characteristics, the upper limit of conditional expression (36) is more preferably set to -0.8, further preferably to -1, and further preferably to -1.13.

[0264] In a zoom lens structure including the above-mentioned negative lens group UN, the zoom lens preferably satisfies the following conditional expression (37). Here, the focal length between the negative lens groups UN in a state where the lens is focused on an object at infinity at the wide-angle end is set to fUN. By preventing the corresponding value of conditional expression (37) from reaching below the lower limit, the optical power of the negative lens group UN can be enhanced, thereby further reducing the amount of movement of the negative lens group UN during zooming, which is conducive to shortening the total length of the lens system. By preventing the corresponding value of conditional expression (37) from reaching above the upper limit, the optical power of the first lens group G1 can be enhanced, thereby contributing to reducing the diameter and weight of the negative lens group UN.

[0265] -1<fUN / f1<-0.2 (37)

[0266] In order to obtain better characteristics, the lower limit of conditional expression (37) is more preferably set to -0.9, further preferably to -0.75, and further preferably to -0.65. In order to obtain better characteristics, the upper limit of conditional expression (37) is more preferably set to -0.3, further preferably to -0.35, and further preferably to -0.44.

[0267] In a zoom lens structure including the above-described negative lens group UN, the zoom lens preferably satisfies the following conditional expression (38). By preventing the corresponding value of conditional expression (38) from falling below the lower limit, the optical power of the negative lens group UN does not become excessively strong, thereby advantageously suppressing aberration fluctuations during zooming. By preventing the corresponding value of conditional expression (38) from falling above the upper limit, the optical power of the negative lens group UN does not become excessively weak, thereby advantageously contributing to miniaturization.

[0268] -1<fw / fUN<-0.25 (38)

[0269] In order to obtain better characteristics, the lower limit of conditional expression (38) is more preferably set to -0.9, further preferably to -0.8, and further preferably to -0.7. In order to obtain better characteristics, the upper limit of conditional expression (38) is more preferably set to -0.35, further preferably to -0.45, and further preferably to -0.52.

[0270] When the focal length of the final lens group GE is set to fE, the zoom lens preferably satisfies the following conditional expression (39). Preventing the corresponding value of conditional expression (39) from falling below the lower limit value facilitates miniaturization. Preventing the corresponding value of conditional expression (39) from reaching above the upper limit value facilitates suppression of various aberrations.

[0271] 0.03<fw / fE<0.75 (39)

[0272] In order to obtain better characteristics, the lower limit value of conditional expression (39) is more preferably set to 0.07, further preferably to 0.1, and further preferably to 0.14. In order to obtain better characteristics, the upper limit value of conditional expression (39) is more preferably set to 0.63, further preferably to 0.5, and further preferably to 0.42.

[0273] In a zoom lens structure including the lens group GP described above, the zoom lens preferably satisfies the following conditional expression (40). The focal length of the P lens group GP is set to fP. Preventing the corresponding value of conditional expression (40) from falling below a lower limit value facilitates achieving a high zoom ratio. Preventing the corresponding value of conditional expression (40) from reaching above an upper limit value facilitates suppressing aberration fluctuations during zooming.

[0274] 0.1<fw / fP<0.6 (40)

[0275] In order to obtain better characteristics, the lower limit of conditional expression (40) is more preferably set to 0.15, further preferably to 0.2, and further preferably to 0.25. In order to obtain better characteristics, the upper limit of conditional expression (40) is more preferably set to 0.5, further preferably to 0.42, and further preferably to 0.35.

[0276] The zoom lens of the present invention can be configured to include an EX group EX, which is inserted into or removed from the optical path to change the focal length of the zoom lens. In this specification, the longest air gap among the air gaps on the optical axis included in the final lens group GE when focusing on an object at infinity at the wide-angle end is referred to as the longest air gap DAmax. Alternatively, the EX group EX can be configured to be insertable or removable, and the EX group EX, by being inserted into the optical path of the longest air gap DAmax, changes the focal length of the zoom lens while maintaining a constant imaging position. With such a configuration, a zoom lens capable of changing its focal length can be obtained.

[0277] As an example, Figure 4 The longest air gap DAmax and the EX group EX are shown in FIG. Figure 4 In the example of , the longest air space DAmax is formed between the fourth lens and the fifth lens from the object side of the final lens group GE. Figure 4 The EX group consists of 7 lenses.

[0278] Will be in Figure 1 The zoom lens is inserted with Figure 4 The structure of the zoom lens and the cross-sectional view of the light beam when the EX group EX is used are shown as Example 1-1. Figure 6 middle. Figure 6 The final lens group GEE becomes Figure 1 The final lens group GE is inserted into the EX group EX structure, which Figure 6 Examples with Figure 1 The examples are different. Figure 6 The other lens groups and group structures in the example are the same as Figure 1 Same as the example. Figure 6 In FIG, the state of focusing on an object at infinity is shown, with the left side being the object side and the right side being the image side. Figure 6 In FIG, the upper section labeled "Wide" shows the wide-angle end state, and the lower section labeled "Tele" shows the telephoto end state. Figure 6 In FIG. 1 , as light beams, an on-axis light beam at the wide-angle end and a light beam at the maximum half-viewing angle ωEXw, and an on-axis light beam at the telephoto end and a light beam at the maximum half-viewing angle ωEXt are shown.

[0279] When the zoom lens includes the above-mentioned EX group EX, it can be configured so that the maximum image height changes by inserting or removing the EX group EX. For example, in the wide-angle end state, the maximum image height changes compared to the one without the EX group EX inserted. Figure 1 The maximum image height IHw of the example shown is compared to Figure 6 The maximum image height IHEw of the example shown in FIG is enlarged. By configuring in this manner, a zoom lens having a wider image circle can be obtained while maintaining the angle of view.

[0280] The zoom lens preferably satisfies the following conditional expression (27). In the state where the zoom lens is focused on an object at infinity at the wide-angle end, the combined lateral magnification of all lenses closer to the image side than the longest air gap DAmax is set to β AmaxR. Preventing the corresponding value of conditional expression (27) from falling below the lower limit value facilitates reducing the diameter of the lens group consisting of all lenses closer to the image side than the longest air gap DAmax. Preventing the corresponding value of conditional expression (27) from reaching above the upper limit value facilitates suppressing aberration fluctuations when the longest air gap DAmax changes due to errors.

[0281] 0.1<β AmaxR<0.3 (27)

[0282] In order to obtain better characteristics, the lower limit of conditional expression (27) is more preferably set to 0.13, further preferably to 0.15, and further preferably to 0.17. In order to obtain better characteristics, the upper limit of conditional expression (27) is more preferably set to 0.27, further preferably to 0.25, and further preferably to 0.23.

[0283] The zoom lens preferably satisfies the following conditional expression (32). In which, the focal length of the zoom lens in the state where the EX group EX is not inserted and the zoom lens is focused on an infinite object at the telephoto end is set to ft. The maximum half-field angle in the state where the EX group EX is not inserted and the zoom lens is focused on an infinite object at the telephoto end is set to ωt. The focal length of the zoom lens in the state where the EX group EX is inserted and the zoom lens is focused on an infinite object at the telephoto end is set to fEXt. The maximum half-field angle in the state where the EX group EX is inserted and the zoom lens is focused on an infinite object at the telephoto end is set to ωEXt. tan is a tangent. By preventing the corresponding value of the conditional expression (32) from reaching below the lower limit value, it is advantageous to simultaneously suppress various aberrations in the state where the EX group EX is not inserted and various aberrations in the state where the EX group EX is inserted. By preventing the corresponding value of the conditional expression (32) from reaching above the upper limit value, it is easy to obtain the image size obtained in the state where the EX group EX is inserted.

[0284] 0.3<(ft×tanωt) / (fEXt×tanωEXt)<0.9 (32)

[0285] In order to obtain better characteristics, the lower limit value of conditional expression (32) is more preferably set to 0.5, further preferably to 0.6, and further preferably to 0.65. In order to obtain better characteristics, the upper limit value of conditional expression (32) is more preferably set to 0.85, further preferably to 0.8, and further preferably to 0.75.

[0286] The zoom lens preferably satisfies the following conditional expression (33). 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 final lens group GE in the state of focusing on an infinitely distant object at the wide-angle end and the back focus in air conversion distance is denoted as TLw. The thickness on the optical axis of the EX group EX is denoted as DEX. As an example, Figure 6 The thickness DEX is shown in FIG. By preventing the corresponding value of conditional expression (33) from falling below the lower limit, it is advantageous to suppress aberrations generated in the EX group EX. By preventing the corresponding value of conditional expression (33) from falling above the upper limit, it is advantageous to reduce the weight of the EX group EX.

[0287] 0.07<DEX / TLw<0.15 (33)

[0288] In order to obtain better characteristics, the lower limit of conditional expression (33) is more preferably set to 0.075, further preferably to 0.08, and further preferably to 0.085. In order to obtain better characteristics, the upper limit of conditional expression (33) is more preferably set to 0.13, further preferably to 0.12, and further preferably to 0.11.

[0289] The zoom lens preferably satisfies the following conditional expression (34). The focal length of the lens component closest to the image side of the EX group EX is set to fLEXe. Furthermore, a lens component refers to a single lens or a cemented lens. A single lens is an uncemented lens. By preventing the corresponding value of the conditional expression (34) from reaching below the lower limit, overcorrection of distortion aberration generated in the EX group EX can be suppressed. By preventing the corresponding value of the conditional expression (34) from reaching above the upper limit, correction of distortion aberration generated in the EX group EX is facilitated.

[0290] -1.5<Bfw / fLEXe<-0.9 (34)

[0291] In order to obtain better characteristics, the lower limit of conditional expression (34) is more preferably set to -1.45. In order to obtain better characteristics, the upper limit of conditional expression (34) is more preferably set to -0.92, further preferably to -0.93, and further preferably to -0.94.

[0292] The zoom lens preferably satisfies the following conditional expression (35). The refractive index of the lens closest to the object in the EX group EX with respect to the d-line is set to NEX1. Preventing the corresponding value of conditional expression (35) from falling below the lower limit value is advantageous for suppressing spherical aberration generated in the EX group EX. Preventing the corresponding value of conditional expression (35) from exceeding the upper limit value is advantageous for suppressing axial chromatic aberration generated in the EX group EX.

[0293] 1.43<NEX1<1.8 (35)

[0294] In order to obtain better characteristics, the lower limit of conditional expression (35) is more preferably set to 1.47, and further preferably to 1.5. In order to obtain better characteristics, the upper limit of conditional expression (35) is more preferably set to 1.76, further preferably to 1.73, and further preferably to 1.7.

[0295] in addition, Figure 1 The example shown in the figure is an example, and various modifications can be made within the scope of the technical purpose of the present invention. For example, the lens group constituting the middle group GM can be Figure 1 The number of lens groups included in the middle group GM and the number of lens groups included in the negative group UN can be set to the same as Figure 1 The number of lenses included in the first lens group G1, the negative group UN, the N lens group GN, the P lens group GP, the final lens group GE and the focusing group may also be set to the same as Figure 1 The focus group, the position of the aperture stop St and the lens group that moves when the magnification is changed can also be configured as Figure 1 The examples are different.

[0296] The above-mentioned preferred structures and achievable structures can be arbitrarily combined within a non-conflicting range, and are preferably appropriately and selectively adopted according to the required specifications.

[0297] As an example, a preferred embodiment of the present invention is a zoom lens, which comprises: a first lens group G1, which is arranged on the side closest to the object and has positive optical power; an intermediate group GM, which includes multiple lens groups; and a final lens group GE, which is arranged on the side closest to the image. When the magnification is changed, all the intervals between adjacent lens groups change. The first lens group G1 includes two negative lenses in sequence from the side closest to the object to the image side. The negative lens on the object side of the two negative lenses is a negative meniscus lens with the convex surface facing the object side. The zoom lens satisfies the above-mentioned conditional formula (1).

[0298] Next, embodiments of the zoom lens of the present invention will be described with reference to the accompanying drawings. Reference symbols used in each group of cross-sectional views of each embodiment are used independently for each embodiment to avoid increasing the number of digits in the reference symbols, which would complicate the description and drawings. Therefore, even if the drawings of different embodiments share the same reference symbols, they do not necessarily represent common structures.

[0299] [Example 1]

[0300] The structure and movement trajectory of the zoom lens of Example 1 are shown in FIG. Figure 1 The diagrammatic representation and structure are as described above, so some repeated descriptions are omitted here. The zoom lens of Example 1 comprises, from the object side to the image side, a first lens group G1 having positive optical power, an intermediate lens group GM, and a final lens group GE having positive optical power. The intermediate lens group GM comprises, from the object side to the image side, a negative lens group UN, an N lens group GN having negative optical power, and a P lens group GP having positive optical power. The negative lens group UN is composed of a lens group having a negative optical power.

[0301] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative group UN, N lens group GN and P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z.

[0302] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0303] Regarding the zoom lens of Example 1, basic lens data are shown in Tables 1A and 1B, specifications and variable surface spacing are shown in Table 2, and aspheric coefficients are shown in Table 3. The basic lens data table is divided into two tables to avoid excessive size of one table.

[0304] The table of basic lens data is as follows. The "Sn" column shows the surface numbers when the surface closest to the object side is set as the first surface and the numbers increase one by one toward the image side. The "R" column shows the radius of curvature of each surface. The "D" column shows the surface spacing on the optical axis between each surface and the surface adjacent to its image side. The "Nd" column shows the refractive index of each component with respect to the d-line. The "vd" column shows the Abbe number of each component based on the d-line. The "θg, F" column shows the partial dispersion ratio between the g-line and the F-line of each component.

[0305] 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 at the bottom of column D in the table is the distance between the surface closest to the image side in the table and the image plane Sim. The variable surface spacing when changing magnification is marked with the symbol DD[], and the object side surface number of the spacing is marked in [] and recorded in column D.

[0306] Table 2 shows the zoom ratio Zr, focal length f, aperture F-number FNo., maximum total angle of view 2ω, and variable plane spacing, based on line d. The zoom ratio has the same meaning as the zoom factor. The [°] in the 2ω column indicates units of degrees. In Table 2, the "Wide," "Middle," and "Tele" columns show the values ​​for the wide-angle end, intermediate focal length, and telephoto end, respectively.

[0307] 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 value of the aspheric coefficient of each aspheric surface is shown in the KA and Am rows. In addition, m in Am is an integer greater than 3, and it varies depending on the surface. For example, in the first surface of Example 1, m = 4, 6, 8, 10, 12, 14, 16, 18, 20. The numerical value of the aspheric coefficient of Table 3 "E±n" (n: integer) means "×10 ±n KA and Am are aspherical coefficients in the aspherical formula represented by the following formula.

[0308] Zd=C×h 2 / {1+(1-KA×C 2 ×h 2 ) 1 / 2}+∑Am×h m

[0309] in,

[0310] Zd: Aspheric depth (the length of the perpendicular line from a point on the aspheric surface at height h to the plane perpendicular to the optical axis Z that contacts the aspheric vertex)

[0311] h: Height (the distance from the optical axis Z to the lens surface)

[0312] C: reciprocal of the paraxial curvature radius

[0313] KA, Am: are aspheric coefficients. The ∑ in the aspheric formula refers to the sum related to m.

[0314] The data in each table uses degrees as the unit of angle and millimeters as the unit of length. However, since optical systems can be used at both magnification and reduction, other appropriate units can also be used. Furthermore, the values ​​in the following tables are rounded to a predetermined number of decimal places.

[0315] [Table 1A]

[0316] Example 1

[0317] Sn R D Nd vd θg,F *1 138.1092 2.5200 1.80100 34.97 0.58642 2 33.5611 27.2580 3 -88.4606 1.2500 1.51633 64.14 0.53531 4 133.0521 2.8370 5 88.1172 6.3500 1.89286 20.36 0.63944 6 ∞ 3.4483 7 -123.6689 1.2200 1.69680 55.53 0.54341 8 476.3220 2.0090 9 125.2708 10.5640 1.53775 74.70 0.53936 *10 -72.3378 4.9400 11 269.0872 1.8750 1.85451 25.15 0.61031 12 53.1897 9.8790 1.43875 94.66 0.53402 13 1737.3611 0.3010 14 96.6172 10.5320 1.43875 94.66 0.53402 15 -122.1869 0.1200 16 310.2448 8.5290 1.69680 55.46 0.54260 *17 -87.8845 DD

[17] *18 -259.2363 0.9750 1.77250 49.60 0.55212 19 38.1444 3.4025 20 -112.2999 0.8800 1.72916 54.09 0.54490 21 27.8171 5.9370 1.73037 32.23 0.58996 22 -66.6854 1.0680 23 -38.3118 0.5000 1.60300 65.44 0.54022 24 117.3507 DD

[24] 25 -45.8768 0.8650 1.75500 52.32 0.54757 26 69.9166 2.3360 1.80518 25.42 0.61616 27 ∞ DD

[27] *28 64.2518 5.5100 1.76600 49.80 0.55442 29 -78.7635 DD

[29]

[0318] [Table 1B]

[0319] Example 1

[0320] Sn R D Nd vd θg,F 30(St) ∞ 1.0010 31 128.7732 5.0970 1.60300 65.44 0.54022 32 -55.4103 1.1100 1.60562 43.71 0.57214 33 -79.8681 0.2170 34 ∞ 4.6400 1.59522 67.73 0.54426 35 -41.3256 1.0950 1.91650 31.60 0.59117 36 ∞ 35.7860 37 91.7706 6.6860 1.57135 52.95 0.55544 38 -59.3617 6.0520 39 ∞ 3.9660 1.80809 22.76 0.63073 40 -49.3745 1.0730 1.95375 32.32 0.59056 41 551.1444 4.2890 42 244.3134 7.5710 1.43875 94.66 0.53402 43 -24.2145 0.9800 2.00100 29.14 0.59974 44 -145.0129 0.6590 45 88.2532 7.8700 1.43875 94.66 0.53402 46 -31.4129 2.9130 47 -38.3860 0.9940 1.85150 40.78 0.56958 48 -535.0390 3.7430 1.80809 22.16 0.63073 49 -51.1645 20.0000 50 ∞ 5.7000 1.51633 64.14 0.53531 51 ∞ 18.6506

[0321] [Table 2]

[0322] Example 1

[0323] Wide Middle Tele Zr 1.0 3.4 6.9 f 14.51 49.51 99.83 FNo. 2.75 2.75 3.70 2ω[°] 93.2 31.0 15.8 DD

[17] 0.9930 44.0637 58.2537 DD

[24] 37.6090 4.0745 3.5548 DD

[27] 4.4560 8.9091 0.7926 DD

[29] 20.9460 6.9567 1.4029

[0324] [Table 3]

[0325] Example 1

[0326]

[0327] Figure 7 , which shows various aberration diagrams of the zoom lens of Example 1 when it is focused on an object at infinity. Figure 7 In the figure, spherical aberration, astigmatism, distortion and lateral chromatic aberration are shown from the left. Figure 7 In the diagram, the upper section marked "Wide" shows aberrations at the wide-angle end, the middle section marked "Middle" shows aberrations at the intermediate focal length, and the lower section marked "Tele" shows aberrations at the telephoto end. In the spherical aberration diagram, aberrations on the d-line, C-line, and F-line are shown as solid lines, long dashed lines, and short dashed lines, respectively. In the astigmatism diagram, aberrations on the d-line in the sagittal direction are shown as solid lines, and aberrations on the d-line in the tangential direction are shown as short dashed lines. In the distortion diagram, aberrations on the d-line are shown as solid lines. In the lateral chromatic aberration diagram, aberrations on the C-line and F-line are shown as long dashed lines and short dashed lines, respectively. In the spherical aberration diagram, the open F value is shown after FNo.=. In the other aberration diagrams, the value of the maximum half field of view angle is shown after ω=.

[0328] Unless otherwise specified, the symbols, meanings, description methods, and diagrammatic methods of the data related to the above-mentioned embodiment 1 are basically the same in the following embodiments, and therefore repeated descriptions are omitted below.

[0329] [Example 1-1]

[0330] Example 1-1 is an example in which an EX group EX is inserted into the zoom lens of Example 1. The structure of the zoom lens of Example 1-1 and the cross-sectional view of the light beam are shown in FIG. Figure 6 The zoom lens of Example 1-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 1, replacing the final lens group GE of Example 1. The other lens groups and group structures of Example 1-1 are the same as those of the zoom lens of Example 1.

[0331] Regarding the zoom lens of Example 1-1, basic lens data are shown in Tables 4A and 4B, specifications and variable surface spacing are shown in Table 5, aspheric coefficients are shown in Table 6, and various aberration diagrams are shown in Table 7. Figure 8 middle.

[0332] [Table 4A]

[0333] Example 1-1

[0334] Sn R D Nd vd θg,F *1 138.1092 2.5200 1.80100 34.97 0.58642 2 33.5611 27.2580 3 -88.4606 1.2500 1.51633 64.14 0.53531 4 133.0521 2.8370 5 88.1172 6.3500 1.89286 20.36 0.63944 6 ∞ 3.4483 7 -123.6689 1.2200 1.69680 55.53 0.54341 8 476.3220 2.0090 9 125.2708 10.5640 1.53775 74.70 0.53936 *10 -72.3378 4.9400 11 269.0872 1.8750 1.85451 25.15 0.61031 12 53.1897 9.8790 1.43875 94.66 0.53402 13 1737.3611 0.3010 14 96.6172 10.5320 1.43875 94.66 0.53402 15 -122.1869 0.1200 16 310.2448 8.5290 1.69680 55.46 0.54260 *17 -87.8845 DD

[17] *18 -259.2363 0.9750 1.77250 49.60 0.55212 19 38.1444 3.4025 20 -112.2999 0.8800 1.72916 54.09 0.54490 21 27.8171 5.9370 1.73037 32.23 0.58996 22 -66.6854 1.0680 23 -38.3118 0.5000 1.60300 65.44 0.54022 24 117.3507 DD

[24] 25 -45.8768 0.8650 1.75500 52.32 0.54757 26 69.9166 2.3360 1.80518 25.42 0.61616 27 ∞ DD

[27] *28 64.2518 5.5100 1.76600 49.80 0.55442 29 -78.7635 DD

[29]

[0335] [Table 4B]

[0336] Example 1-1

[0337] Sn R D Nd vd θg,F 30(St) ∞ 1.0010 31 128.7732 5.0970 1.60300 65.44 0.54022 32 -55.4103 1.1100 1.60562 43.71 0.57214 33 -79.8681 0.2170 34 ∞ 4.6400 1.59522 67.73 0.54426 35 -41.3256 1.0950 1.91650 31.60 0.59117 36 ∞ 1.8400 37 29.4999 5.1270 1.63246 63.77 0.54215 38 133.7259 0.5690 39 39.3037 0.9900 2.00100 29.13 0.59952 40 19.7303 8.6730 1.56732 42.82 0.57309 41 -266.2754 0.0810 42 -240.9636 1.0130 1.83400 37.21 0.58082 43 17.1786 7.4850 1.69895 30.05 0.60282 44 -81.3577 0.7620 45 -87.1565 0.8010 1.76385 48.49 0.55898 46 25.9125 1.7750 1.76182 26.52 0.61361 47 33.3959 6.6700 48 91.7706 6.6860 1.57135 52.95 0.55544 49 -59.3617 6.0520 50 ∞ 3.9660 1.80809 22.76 0.63073 51 -49.3745 1.0730 1.95375 32.32 0.59056 52 551.1444 4.2890 53 244.3134 7.5710 1.43875 94.66 0.53402 54 -24.2145 0.9800 2.00100 29.14 0.59974 55 -145.0129 0.6590 56 88.2532 7.8700 1.43875 94.66 0.53402 57 -31.4129 2.9130 58 -38.3860 0.9940 1.85150 40.78 0.56958 59 -535.0390 3.7430 1.80809 22.16 0.63073 60 -51.1645 20.0000 61 ∞ 5.7000 1.51633 64.14 0.53531 62 ∞ 18.6381

[0338] [Table 5]

[0339] Example 1-1

[0340] Wide Middle Tele Zr 1.0 3.4 6.9 f 21.22 72.40 145.99 FNo. 4.12 4.12 5.40 2ω[°] 92.0 30.4 15.4 DD

[17] 0.9930 44.0637 58.2537 DD

[24] 37.6090 4.0745 3.5548 DD

[27] 4.4560 8.9091 0.7926

[0341] [Table 6]

[0342] Example 1-1

[0343]

[0344] [Example 2]

[0345] The structure and movement trajectory of the zoom lens of Example 2 are shown in FIG. Figure 9 The zoom lens of Example 2 comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group GM, and a final lens group GE having positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN, an N lens group GN having negative refractive power, and a P lens group GP having positive refractive power. The negative lens group UN is composed of a lens group having a single negative refractive power.

[0346] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative group UN, N lens group GN and P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z.

[0347] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fourth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0348] Regarding the zoom lens of Example 2, basic lens data are shown in Tables 7A and 7B, specifications and variable surface spacing are shown in Table 8, aspheric coefficients are shown in Table 9, and various aberration diagrams are shown in Table 10. Figure 10 middle.

[0349] [Table 7A]

[0350] Example 2

[0351] Sn R D Nd vd θg,F *1 125.7823 2.4900 1.80100 34.97 0.58642 2 32.6239 29.6213 3 -79.6149 1.2630 1.72916 54.54 0.54535 4 111.8386 0.1203 5 96.6943 5.6241 1.94595 17.98 0.65460 6 -2481.0651 2.1614 7 148.7487 8.1071 1.53775 74.70 0.53936 *8 -81.4651 8.0848 9 -1237.0096 1.2000 1.84666 23.84 0.62012 10 58.3321 14.1342 1.43700 95.10 0.53364 11 -101.3760 0.1203 *12 153.0146 6.7038 1.49700 81.54 0.53748 13 -232.7903 0.7230 14 578.6200 9.0515 1.76385 48.49 0.55898 15 -75.3264 DD

[15] 16 -83.1757 1.2020 1.81600 46.62 0.55682 17 31.9646 2.9093 18 2381.5684 0.8268 1.69100 54.82 0.54499 19 26.0654 5.4611 1.68960 31.14 0.60319 20 -153.1643 0.1200 21 -11140.4924 0.8009 1.49700 81.61 0.53887 *22 59.5981 DD

[22] 23 -46.4056 0.8103 1.72916 54.54 0.54535 24 67.7339 2.3755 1.85451 25.15 0.61031 25 372.5353 DD

[25] *26 62.5081 5.2221 1.80610 40.93 0.57019 27 -93.5285 DD

[27]

[0352] [Table 7B]

[0353] Example 2

[0354] Sn R D Nd vd θg,F 28(St) ∞ 1.0002 29 121.4160 1.0806 1.67328 38.05 0.57663 30 61.2322 5.7323 1.67366 57.55 0.54705 31 -91.5433 0.2792 32 161.5312 5.0416 1.49700 81.54 0.53748 33 -56.0379 0.8764 2.05090 26.94 0.60519 34 420.9795 35.7357 35 165.3551 5.6832 1.48749 70.24 0.53007 36 -56.9700 11.1304 37 109.1397 6.6068 1.85896 22.73 0.62844 38 -39.4279 0.8002 1.92198 34.66 0.58388 39 118.8684 0.1209 40 81.6411 7.6263 1.43700 95.10 0.53364 41 -31.5585 0.8000 2.00100 29.13 0.59952 42 242.9196 0.4184 43 44.8278 0.8765 1.83285 37.69 0.57645 44 33.2159 8.6441 1.50120 57.82 0.54543 45 -68.0656 20.0000 46 ∞ 5.7000 1.51633 64.14 0.53531 47 ∞ 23.2984

[0355] [Table 8]

[0356] Example 2

[0357] Wide Middle Tele Zr 1.0 3.4 6.9 f 14.32 48.88 98.55 FNo. 2.75 2.75 3.69 2ω[°] 93.8 31.4 16.0 DD

[15] 0.9169 46.3357 61.5165 DD

[22] 38.6635 4.0701 5.1631 DD

[25] 4.9192 8.9929 0.7895 DD

[27] 24.8046 9.9055 1.8351

[0358] [Table 9]

[0359] Example 2

[0360]

[0361] [Example 2-1]

[0362] Example 2-1 is an example in which an EX group EX is inserted into the zoom lens of Example 2. The structure of the zoom lens of Example 2-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. Figure 11The zoom lens of Example 2-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 2, instead of the final lens group GE of Example 2. The other lens groups and group structures of Example 2-1 are the same as those of the zoom lens of Example 2.

[0363] Regarding the zoom lens of Example 2-1, basic lens data are shown in Tables 10A and 10B, specifications and variable surface spacing are shown in Table 11, aspheric coefficients are shown in Table 12, and various aberration diagrams are shown in Table 13. Figure 12 middle.

[0364] [Table 10A]

[0365] Example 2-1

[0366]

[0367]

[0368] [Table 10B]

[0369] Example 2-1

[0370] Sn R D Nd vd θg,F 28(St) ∞ 1.0002 29 121.4160 1.0806 1.67328 38.05 0.57663 30 61.2322 5.7323 1.67366 57.55 0.54705 31 -91.5433 0.2792 32 161.5312 5.0416 1.49700 81.54 0.53748 33 -56.0379 0.8764 2.05090 26.94 0.60519 34 420.9795 1.1210 35 29.8888 5.5163 1.69560 59.05 0.54348 36 175.4804 0.9983 37 46.1489 0.8001 2.00069 25.46 0.61364 38 19.7507 7.3663 1.65295 35.56 0.58725 39 -460.3581 0.2175 40 -260.6103 0.8007 2.00100 29.13 0.59952 41 17.0830 7.2058 1.81679 24.14 0.62300 42 -234.0912 0.8361 43 -207.6734 0.8118 1.74177 53.77 0.54589 44 21.4745 2.5298 1.74178 27.91 0.60884 45 33.2483 7.5326 46 165.3551 5.6832 1.48749 70.24 0.53007 47 -56.9700 11.1304 48 109.1397 6.6068 1.85896 22.73 0.62844 49 -39.4279 0.8002 1.92198 34.66 0.58388 50 118.8684 0.1209 51 81.6411 7.6263 1.43700 95.10 0.53364 52 -31.5585 0.8000 2.00100 29.13 0.59952 53 242.9196 0.4184 54 44.8278 0.8765 1.83285 37.69 0.57645 55 33.2159 8.6441 1.50120 57.82 0.54543 56 -68.0656 20.0000 57 ∞ 5.7000 1.51633 64.14 0.53531 58 ∞ 23.2430

[0371] [Table 11]

[0372] Example 2-1

[0373] Wide Middle Tele Zr 1.0 3.4 6.9 f 21.05 71.81 144.79 FNo. 4.11 4.11 5.42 2ω[°] 92.6 31.0 15.8 DD

[15] 0.9169 46.3357 61.5165 DD

[22] 38.6635 4.0701 5.1631 DD

[25] 4.9192 8.9929 0.7895 DD

[27] 24.8046 9.9055 1.8351

[0374] [Table 12]

[0375] Example 21

[0376]

[0377] [Example 3]

[0378] The structure and movement trajectory of the zoom lens of Example 3 are shown in FIG. Figure 13 The zoom lens of Example 3 comprises, in order from the object side to the image side, a first lens group G1 with positive refractive power, an intermediate lens group GM, and a final lens group GE with positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN, an N lens group GN with negative refractive power, and a P lens group GP with positive refractive power. The negative lens group UN is composed of a lens group with a single negative refractive power.

[0379] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative group UN, N lens group GN and P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z.

[0380] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0381] Regarding the zoom lens of Example 3, basic lens data are shown in Tables 13A and 13B, specifications and variable surface spacing are shown in Table 14, aspheric coefficients are shown in Table 15, and various aberration diagrams are shown in Table 16. Figure 14 middle.

[0382] [Table 13A]

[0383] Example 3

[0384] Sn R D Nd vd θg,F *1 128.4585 2.5037 1.80100 34.97 0.58642 2 33.4713 22.0363 3 -658.9949 1.5382 1.48749 70.44 0.53062 4 499.2338 6.8919 5 -76.9652 1.5237 1.62041 60.34 0.53946 6 124.8392 0.1999 7 98.3916 6.1647 1.92286 20.88 0.63900 8 -1983.4554 1.0988 9 108.4144 9.0188 1.53775 74.70 0.53936 *10 -103.5411 5.9645 11 -458.8863 1.4978 1.78880 28.43 0.60092 12 54.1026 13.0065 1.43700 95.10 0.53364 13 -152.4737 0.1204 14 101.1059 9.6889 1.43700 95.10 0.53364 15 -122.6228 1.7866 *16 291.9638 8.4731 1.69680 55.53 0.54341 17 -84.1769 DD

[17] *18 1157.5713 0.9632 1.69680 55.53 0.54341 19 32.1959 4.2534 20 -90.5304 0.7144 1.72916 54.54 0.54535 21 31.6757 5.1920 1.72047 34.71 0.58350 22 -67.9677 1.7491 23 -34.7898 0.6000 1.57144 71.61 0.54193 24 177.8321 DD

[24] 25 -44.4223 0.6885 1.77250 49.60 0.55212 26 117.7324 1.5997 1.94595 17.98 0.65460 27 1111.2437 DD

[27] *28 72.2870 4.6222 1.80610 40.93 0.57019 29 -77.5221 DD

[29]

[0385] [Table 13B]

[0386] Example 3

[0387] Sn R D Nd vd θg,F 30(St) ∞ 1.0000 31 135.6274 0.8682 1.59270 35.45 0.59271 32 37.4408 6.7909 1.59282 68.62 0.54414 33 -85.6835 0.1199 34 343.9230 4.6746 1.53996 59.46 0.54418 35 -45.3445 0.8549 1.95375 32.32 0.59015 36 -924.3087 35.3537 37 137.9575 5.1031 1.60738 56.71 0.54817 38 -66.3162 9.2049 39 93.5233 5.9241 1.80809 22.76 0.63073 40 -45.4572 0.8542 1.91082 35.25 0.58335 41 228.0251 2.6088 42 87.4946 6.6053 1.49700 81.61 0.53887 43 -33.4738 1.0645 2.00069 25.46 0.61364 44 60.3051 1.2313 45 47.9533 7.7880 1.55200 70.70 0.54219 46 -35.1041 0.8671 2.00100 29.13 0.59952 47 812.8350 2.7965 48 268.6174 5.5674 1.84666 23.84 0.62012 49 -48.7517 20.0000 50 ∞ 5.7000 1.51633 64.14 0.53531 51 ∞ 16.3775

[0388] [Table 14]

[0389] Example 3

[0390] Wide Middle Tele Zr 1.0 3.4 6.9 f 14.52 49.55 99.91 FNo. 2.74 2.74 3.69 2ω[°] 93.0 30.8 15.8 DD

[17] 0.7897 42.9532 57.2374 DD

[24] 38.0018 3.4401 4.0498 DD

[27] 4.8769 8.9728 0.7886 DD

[29] 20.0380 8.3403 1.6306

[0391] [Table 15]

[0392] Example 3

[0393]

[0394] [Example 3-1]

[0395] Example 3-1 is an example in which an EX group EX is inserted into the zoom lens of Example 3. The structure of the zoom lens of Example 3-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. Figure 15 The zoom lens of Example 3-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 3, replacing the final lens group GE of Example 3. The other lens groups and group structures of Example 3-1 are the same as those of the zoom lens of Example 3.

[0396] Regarding the zoom lens of Example 3-1, basic lens data are shown in Tables 16A and 16B, specifications and variable surface spacing are shown in Table 17, aspheric coefficients are shown in Table 18, and various aberration diagrams are shown in Table 19. Figure 16 middle.

[0397] [Table 16A]

[0398] Example 3-1

[0399] Sn R D Nd vd θg,F *1 128.4585 2.5037 1.80100 34.97 0.58642 2 33.4713 22.0363 3 -658.9949 1.5382 1.48749 70.44 0.53062 4 499.2338 6.8919 5 -76.9652 1.5237 1.62041 60.34 0.53946 6 124.8392 0.1999 7 98.3916 6.1647 1.92286 20.88 0.63900 8 -1983.4554 1.0988 9 108.4144 9.0188 1.53775 74.70 0.53936 *10 -103.5411 5.9645 11 -458.8863 1.4978 1.78880 28.43 0.60092 12 54.1026 13.0065 1.43700 95.10 0.53364 13 -152.4737 0.1204 14 101.1059 9.6889 1.43700 95.10 0.53364 15 -122.6228 1.7866 *16 291.9638 8.4731 1.69680 55.53 0.54341 17 -84.1769 DD

[17] *18 1157.5713 0.9632 1.69680 55.53 0.54341 19 32.1959 4.2534 20 -90.5304 0.7144 1.72916 54.54 0.54535 21 31.6757 5.1920 1.72047 34.71 0.58350 22 -67.9677 1.7491 23 -34.7898 0.6000 1.57144 71.61 0.54193 24 177.8321 DD

[24] 25 -44.4223 0.6885 1.77250 49.60 0.55212 26 117.7324 1.5997 1.94595 17.98 0.65460 27 1111.2437 DD

[27] *28 72.2870 4.6222 1.80610 40.93 0.57019 29 -77.5221 DD

[29]

[0400] [Table 16B]

[0401] Example 3-1

[0402] Sn R D Nd vd θg,F 30(St) ∞ 1.0000 31 135.6274 0.8682 1.59270 35.45 0.59271 32 37.4408 6.7909 1.59282 68.62 0.54414 33 -85.6835 0.1199 34 343.9230 4.6746 1.53996 59.46 0.54418 35 -45.3445 0.8549 1.95375 32.32 0.59015 36 -924.3087 1.0001 37 27.7317 5.3920 1.62041 60.34 0.53946 38 212.2413 0.1200 39 44.6827 2.1566 2.00100 29.13 0.59952 40 19.5714 7.2262 1.61340 44.27 0.56340 41 -208.9698 0.6190 42 -115.1642 0.7513 1.95375 32.32 0.59015 43 16.5477 7.3466 1.78472 25.72 0.61585 44 -87.1102 1.2519 45 -100.1956 0.6088 1.72916 54.54 0.54535 46 29.2717 1.3823 1.72825 28.32 0.60755 47 34.0338 7.4990 48 137.9575 5.1031 1.60738 56.71 0.54817 49 -66.3162 9.2049 50 93.5233 5.9241 1.80809 22.76 0.63073 51 -45.4572 0.8542 1.91082 35.25 0.58335 52 228.0251 2.6088 53 87.4946 6.6053 1.49700 81.61 0.53887 54 -33.4738 1.0645 2.00069 25.46 0.61364 55 60.3051 1.2313 56 47.9533 7.7880 1.55200 70.70 0.54219 57 -35.1041 0.8671 2.00100 29.13 0.59952 58 812.8350 2.7965 59 268.6174 5.5674 1.84666 23.84 0.62012 60 -48.7517 20.0000 61 ∞ 5.7000 1.51633 64.14 0.53531 62 ∞ 16.3529

[0403] [Table 17]

[0404] Example 31

[0405] Wide Middle Tele Zr 1.0 3.4 6.9 f 21.58 73.64 148.48 FNo. 4.11 4.11 5.48 2ω[°] 90.8 30.0 15.2 DD

[17] 0.7897 42.9532 57.2374 DD

[24] 38.0018 3.4401 4.0498 DD

[27] 4.8769 8.9728 0.7886 DD

[29] 20.0380 8.3403 1.6306

[0406] [Table 18]

[0407] Example 31

[0408]

[0409] [Example 4]

[0410] The structure and movement trajectory of the zoom lens of Example 4 are shown in FIG. Figure 17 The zoom lens of Example 4 comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group GM, and a final lens group GE having positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN, an N lens group GN having negative refractive power, and a P lens group GP having positive refractive power. The negative lens group UN is composed of a lens group having a single negative refractive power.

[0411] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative group UN, N lens group GN and P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z.

[0412] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fourth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0413] Regarding the zoom lens of Example 4, basic lens data are shown in Tables 19A and 19B, 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. Figure 18 middle.

[0414] [Table 19A]

[0415] Example 4

[0416] Sn R D Nd vd θg,F *1 171.8404 2.6164 1.80100 34.97 0.58642 2 32.0540 26.0000 3 -70.7356 2.5000 1.72000 50.23 0.55214 4 226.9242 0.2650 5 117.8727 7.4995 1.85896 22.73 0.62844 6 -892.4867 1.2962 *7 77.5549 10.0002 1.52841 76.45 0.53954 8 -95.6082 7.5741 9 -65.8524 2.0209 1.62495 35.58 0.58476 10 88.7431 11.0010 1.43700 95.10 0.53364 11 -134.4623 0.1508 12 135.5222 15.0009 1.45650 90.27 0.53477 13 -60.1312 0.1501 *14 96.3237 8.5007 1.51680 64.20 0.53430 15 -128.8341 DD

[15] 16 -1980.8602 0.8807 1.80400 46.58 0.55730 17 22.1078 5.6377 18 197.5730 0.7500 1.72916 54.68 0.54451 19 30.6793 7.0100 1.72825 28.46 0.60772 20 -31.9088 1.4030 21 -27.6596 1.0981 1.83441 37.28 0.57732 *22 -389.4007 DD

[22] 23 -47.4698 3.2101 1.89286 20.36 0.63944 24 -27.5052 0.8303 1.90043 37.37 0.57720 25 -188.8371 DD

[25] *26 69.6374 6.5004 1.64000 60.20 0.53610 27 -62.9784 DD

[27]

[0417] [Table 19B]

[0418] Example 4

[0419] Sn R D Nd vd θg,F 28(St) ∞ 1.0000 29 50.7043 5.0007 1.49103 74.63 0.52253 30 -187.6456 1.6670 31 -195.7877 2.3210 1.91740 19.34 0.63437 32 -123.3970 2.0007 1.92155 34.15 0.58485 33 84.6773 2.0106 1.52317 57.02 0.54883 34 287.0921 35.4002 35 50.6587 8.6937 1.54393 71.16 0.52854 36 -64.0499 1.2743 37 40.4461 7.0101 1.49103 80.26 0.51480 38 -42.6630 2.6812 1.94773 34.79 0.58147 39 37.4458 5.1786 40 237.3000 6.0091 1.64600 33.86 0.58918 41 -24.5653 0.8002 1.87545 40.45 0.56727 42 -337.3758 6.1697 43 56.2408 8.8089 1.47424 85.78 0.50605 44 -69.6680 20.0000 45 ∞ 5.7000 1.51633 64.14 0.53531 46 ∞ 23.2591

[0420] [Table 20]

[0421] Example 4

[0422] Wide Middle Tele Zr 1.0 3.4 6.9 f 13.97 47.74 96.36 FNo. 2.75 2.75 3.69 2ω[°] 95.0 32.0 16.4 DD

[15] 1.0009 41.7018 54.4375 DD

[22] 38.1977 2.1959 3.7759 DD

[25] 10.2733 13.2546 1.4931 DD

[27] 11.8428 4.1624 1.6082

[0423] [Table 21]

[0424] Example 4

[0425]

[0426] [Example 4-1]

[0427] Example 4-1 is an example in which an EX group EX is inserted into the zoom lens of Example 4. The structure of the zoom lens of Example 4-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. Figure 19 The zoom lens of Example 4-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 4, instead of the final lens group GE of Example 4. The other lens groups and group structures of Example 4-1 are the same as those of the zoom lens of Example 4.

[0428] Regarding the zoom lens of Example 4-1, basic lens data are shown in Tables 22A and 22B, specifications and variable surface spacing are shown in Table 23, aspheric coefficients are shown in Table 24, and various aberration diagrams are shown in Table 25. Figure 20 middle.

[0429] [Table 22A]

[0430] Example 4-1

[0431] Sn R D Nd vd θg,F *1 171.8404 2.6164 1.80100 34.97 0.58642 2 32.0540 26.0000 3 -70.7356 2.5000 1.72000 50.23 0.55214 4 226.9242 0.2650 5 117.8727 7.4995 1.85896 22.73 0.62844 6 -892.4867 1.2962 *7 77.5549 10.0002 1.52841 76.45 0.53954 8 -95.6082 7.5741 9 -65.8524 2.0209 1.62495 35.58 0.58476 10 88.7431 11.0010 1.43700 95.10 0.53364 11 -134.4623 0.1508 12 135.5222 15.0009 1.45650 90.27 0.53477 13 -60.1312 0.1501 *14 96.3237 8.5007 1.51680 64.20 0.53430 15 -128.8341 DD

[15] 16 -1980.8602 0.8807 1.80400 46.58 0.55730 17 22.1078 5.6377 18 197.5730 0.7500 1.72916 54.68 0.54451 19 30.6793 7.0100 1.72825 28.46 0.60772 20 -31.9088 1.4030 21 -27.6596 1.0981 1.83441 37.28 0.57732 *22 -389.4007 DD

[22] 23 -47.4698 3.2101 1.89286 20.36 0.63944 24 -27.5052 0.8303 1.90043 37.37 0.57720 25 -188.8371 DD

[25] *26 69.6374 6.5004 1.64000 60.20 0.53610 27 -62.9784 DD

[27]

[0432] [Table 22B]

[0433] Example 4-1

[0434] Sn R D Nd v d θg, F 28(St) ∞ 1.0000 29 50.7043 5.0007 1.49103 74.63 0.52253 30 -187.6456 1.6670 31 -195.7877 2.3210 1.91740 19.34 0.63437 32 -123.3970 2.0007 1.92155 34.15 0.58485 33 84.6773 2.0106 1.52317 57.02 0.54883 34 287.0921 1.0000 35 29.9380 7.7095 1.53474 66.99 0.53473 36 338.1886 0.4071 37 42.7775 0.8006 1.96085 30.16 0.59749 38 19.1825 7.3103 1.68380 38.68 0.58022 39 -437.9133 0.1207 40 -269.6683 0.8003 1.82193 47.35 0.55191 41 17.4480 6.1758 1.55166 48.09 0.56303 42 -213.7946 1.0384 43 -75.1620 1.8706 1.48957 68.18 0.53126 44 17.0894 3.4462 1.49689 80.48 0.51480 45 33.8706 4.7207 46 50.6587 8.6937 1.54393 71.16 0.52854 47 -64.0499 1.2743 48 40.4461 7.0101 1.49103 80.26 0.51480 49 -42.6630 2.6812 1.94773 34.79 0.58147 50 37.4458 5.1786 51 237.3000 6.0091 1.64600 33.86 0.58918 52 -24.5653 0.8002 1.87545 40.45 0.56727 53 -337.3758 6.1697 54 56.2408 8.8089 1.47424 85.18 0.50605 55 -69.6680 20.0000 56 ∞ 5.7000 1.51633 64.14 0.53531 57 ∞ 23.2053

[0435] [Table 23]

[0436] Example 4-1

[0437] Wide Middle Tele Zr 1.0 3.4 6.9 f 20.34 69.52 140.34 FNo. 3.99 3.99 5.37 2ω[°] 94.2 31.8 16.2 DD

[15] 1.0009 41.7018 54.4375 DD

[22] 38.1977 2.1959 3.7759 DD

[25] 10.2733 13.2546 1.4931 DD

[27] 11.8428 4.1624 1.6082

[0438] [Table 24]

[0439] Example 4-1

[0440]

[0441] [Example 5]

[0442] The structure and movement trajectory of the zoom lens of Example 5 are shown in FIG. Figure 21 The zoom lens of Example 5 comprises, in order from the object side to the image side, a first lens group G1 with positive refractive power, an intermediate lens group GM, and a final lens group GE with positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN, an N lens group GN with negative refractive power, and a P lens group GP with positive refractive power. The negative lens group UN is composed of a lens group with a single negative refractive power.

[0443] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative group UN, N lens group GN and P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z.

[0444] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0445] Regarding the zoom lens of Example 5, basic lens data are shown in Tables 25A and 25B, specifications and variable surface spacing are shown in Table 26, aspheric coefficients are shown in Table 27, and various aberration diagrams are shown in Table 28. Figure 22 middle.

[0446] [Table 25A]

[0447] Example 5

[0448] Sn R D Nd v d θg, F *1 141.3246 2.2582 1.83441 37.28 0.57732 2 33.6484 25.5274 3 -88.2467 1.1234 1.48749 70.24 0.53007 4 141.1335 1.7431 5 86.5961 5.7007 1.89286 20.36 0.63944 6 11962.3519 3.4638 7 -124.3588 1.0974 1.66755 41.87 0.57515 8 481.1241 0.9000 9 125.5361 8.8787 1.55032 75.50 0.54001 *10 -74.0646 7.9788 11 246.5828 1.6462 1.85451 25.15 0.61031 12 53.0306 8.6102 1.43875 94.66 0.53402 13 2777.2517 0.3002 14 98.1233 8.4920 1.43875 94.66 0.53402 15 -121.8255 0.1209 16 306.2842 6.9539 1.72916 54.68 0.54451 *17 -88.0664 DD

[17] *18 -291.8762 0.8517 1.78590 43.93 0.56118 19 38.5363 3.3778 20 -111.9075 0.8104 1.72916 54.68 0.54451 21 31.1050 4.9229 1.77047 29.14 0.59514 22 -67.1497 1.1540 23 -36.1172 0.5004 1.59410 60.47 0.55516 24 107.2963 DD

[24] 25 -45.5598 0.8282 1.75500 52.32 0.54757 26 68.1999 2.2381 1.80518 25.42 0.61616 27 10362.0166 DD

[27] *28 60.9118 4.8035 1.73400 51.47 0.54874 29 -79.1176 DD

[29]

[0449] [Table 25B]

[0450] Example 5

[0451] Sn R D Nd v d θg, F 30(St) ∞ 1.0008 31 130.3544 3.9944 1.65160 58.54 0.53901 32 -64.8573 0.9709 1.62004 36.26 0.58800 33 -79.4469 0.1206 34 324258.9576 4.2759 1.59522 67.73 0.54426 35 -41.4725 0.9485 1.91650 31.60 0.59117 36 -106578.2017 34.6699 37 85.2343 5.8589 1.57135 52.95 0.55544 38 -61.5141 9.3499 39 ∞ 2.9595 1.80809 22.76 0.63073 40 -65.4197 0.9420 1.95375 32.32 0.59056 41 680.8127 0.1209 42 195.8879 7.1437 1.43875 94.66 0.53402 43 -26.1615 0.8876 2.00100 29.14 0.59974 44 -159.4307 0.5008 45 77.2156 7.3509 1.43875 94.66 0.53402 46 -33.6459 3.2159 47 -38.2604 0.8879 1.85150 40.78 0.56958 48 501.3595 3.3823 1.80809 22.76 0.63073 49 -63.0353 20.0000 50 ∞ 5.7000 1.51633 64.14 0.53531 51 ∞ 16.3106

[0452] [Table 26]

[0453] Example 5

[0454] Wide Middle Tele Zr 1.0 3.0 5.6 f 16.00 48.04 90.02 FNo. 2.75 2.75 3.41 2ω[°] 87.4 32.0 17.4 DD

[17] 1.0202 38.5280 51.8890 DD

[24] 36.1784 5.9794 3.5705 DD

[27] 3.3817 7.1984 1.0946 DD

[29] 17.4135 6.2880 1.4398

[0455] [Table 27]

[0456] Example 5

[0457]

[0458] [Example 5-1]

[0459] Example 5-1 is an example in which an EX group EX is inserted into the zoom lens of Example 5. The structure of the zoom lens of Example 5-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. Figure 23 The zoom lens of Example 5-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 5, instead of the final lens group GE of Example 5. The other lens groups and group structures of Example 5-1 are the same as those of the zoom lens of Example 5.

[0460] Regarding the zoom lens of Example 5-1, basic lens data are shown in Tables 28A and 28B, specifications and variable surface spacing are shown in Table 29, aspheric coefficients are shown in Table 30, and various aberration diagrams are shown in Table 31. Figure 24 middle.

[0461] [Table 28A]

[0462] Example 51

[0463]

[0464]

[0465] [Table 28B]

[0466] Example 5-1

[0467] Sn R D Nd v d θg, F 30(St) ∞ 1.0008 31 130.3544 3.9944 1.65160 58.54 0.53901 32 -64.8573 0.9709 1.62004 36.26 0.58800 33 -79.4469 0.1206 34 324258.9576 4.2759 1.59522 67.73 0.54426 35 -41.4725 0.9485 1.91650 31.60 0.59117 36 -106578.2017 0.8000 37 29.4539 4.8970 1.63246 63.77 0.54215 38 132.4223 0.9376 39 39.0964 1.2149 2.00100 29.13 0.59952 40 19.4730 8.3647 1.56732 42.82 0.57309 41 -233.0580 0.0822 42 -213.1486 0.8369 1.83400 37.21 0.58082 43 17.0773 7.3953 1.69895 30.05 0.60282 44 -79.5985 1.1174 45 -88.9877 0.8010 1.76385 48.49 0.55898 46 26.9888 1.6790 1.76182 26.52 0.61361 47 32.7969 6.5440 48 85.2343 5.8589 1.57135 52.95 0.55544 49 -61.5141 9.3499 50 ∞ 2.9595 1.80809 22.76 0.63073 51 -65.4197 0.9420 1.95375 32.32 0.59056 52 680.8127 0.1209 53 195.8879 7.1437 1.43875 94.66 0.53402 54 -26.1615 0.8876 2.00100 29.14 0.59974 55 -159.4307 0.5008 56 77.2156 7.3509 1.43875 94.66 0.53402 57 -33.6459 3.2159 58 -38.2604 0.8879 1.85150 40.78 0.56958 59 501.3595 3.3823 1.80809 22.76 0.63073 60 -63.0353 20.0000 61 ∞ 5.7000 1.51633 64.14 0.53531 62 ∞ 16.2956

[0468] [Table 29]

[0469] Example 5-1

[0470] Wide Middle Tele Zr 1.0 3.0 5.6 f 23.66 71.02 133.08 FNo. 4.11 4.12 5.04 2ω[°] 85.4 31.0 17.0 DD

[17] 1.0202 38.5280 51.8890 DD

[24] 36.1784 5.9794 3.5705 DD

[27] 3.3817 7.1984 1.0946 DD

[29] 17.4135 6.2880 1.4398

[0471] [Table 30]

[0472] Example 5-1

[0473]

[0474] [Example 6]

[0475] The structure and movement trajectory of the zoom lens of Example 6 are shown in FIG. Figure 25 The zoom lens of Example 6 comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group GM, and a final lens group GE having positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN, an N lens group GN having negative refractive power, and a P lens group GP having positive refractive power. The negative lens group UN is composed of a lens group having a single negative refractive power.

[0476] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative group UN, N lens group GN and P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z.

[0477] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0478] Regarding the zoom lens of Example 6, basic lens data are shown in Tables 31A and 31B, specifications and variable surface spacing are shown in Table 32, aspheric coefficients are shown in Table 33, and various aberration diagrams are shown in Table 34. Figure 26 middle.

[0479] [Table 31A]

[0480] Example 6

[0481] Sn R D Nd v d θg, F *1 139.1704 2.5500 1.80100 34.97 0.58642 2 33.7302 27.1363 3 -88.2466 1.2500 1.51633 64.14 0.53531 4 119.3390 2.3572 5 86.9791 6.7435 1.89286 20.36 0.63944 6 -2337.2722 3.7902 7 -117.9014 1.2000 1.67790 55.34 0.54726 8 535.9838 1.0939 9 136.4451 10.0421 1.53775 74.70 0.53936 *10 -72.6276 5.3092 11 252.8044 1.5600 1.85451 25.15 0.61031 12 53.1537 12.0307 1.43700 95.10 0.53364 13 -370.1077 0.3006 14 98.8219 10.0835 1.43700 95.10 0.53364 15 -130.3712 0.1208 16 1531.8763 7.5967 1.69680 55.53 0.54341 *17 -82.0029 DD

[17] *18 -154.7477 0.9183 1.77250 49.62 0.55038 19 40.1804 3.3180 20 -95.1389 0.8109 1.72916 54.54 0.54535 21 35.9801 5.2634 1.73037 32.23 0.58996 22 -57.2431 0.7481 23 -40.0675 0.8005 1.60300 65.44 0.54022 24 117.2516 DD

[24] 25 -46.6396 0.8106 1.72916 54.54 0.54535 26 70.9636 2.4498 1.80518 25.46 0.61572 27 1074.6394 DD

[27] *28 70.1392 5.0554 1.77250 49.62 0.55038 29 -77.8250 DD

[29]

[0482] [Table 31B]

[0483] Example 6

[0484] Sn R D Nd v d θg, F 30(St) ∞ 1.0009 31 126.0843 0.9370 1.67300 38.26 0.57580 32 48.8610 6.1430 1.67790 55.35 0.54339 33 -96.9693 0.1200 34 451.2294 4.9080 1.55200 70.70 0.54219 35 -47.0054 0.9229 1.90366 31.31 0.59481 36 809.5591 35.4013 37 90.1048 6.3832 1.51823 58.90 0.54567 38 -61.9710 7.4481 39 210.5191 7.2286 1.80809 22.76 0.63073 40 -31.1005 0.8003 1.91082 35.25 0.58224 41 207.5564 0.2526 42 67.8636 7.9318 1.43700 95.10 0.53364 43 -31.8559 0.8009 2.00100 29.13 0.59952 44 77.4776 0.1202 45 57.3831 9.1760 1.48071 85.29 0.53623 46 -31.3986 6.4633 47 -39.0821 0.9231 1.88300 40.76 0.56679 48 -66.7468 2.9129 49 91.5278 2.8950 1.84666 23.84 0.62012 50 745.9052 20.0000 51 ∞ 5.7000 1.51633 64.14 0.53531 52 ∞ 13.2593

[0485] [Table 32]

[0486] Example 6

[0487] Wide Middle Tele Zr 1.0 3.4 6.9 f 14.52 49.55 99.92 FNo. 2.75 2.75 3.70 2ω[°] 93.2 31.0 15.8 DD

[17] 0.8871 46.0357 61.2144 DD

[24] 37.5436 3.5827 4.0925 DD

[27] 3.7954 8.8450 0.7885 DD

[29] 25.2585 9.0213 1.3892

[0488] [Table 33]

[0489] Example 6

[0490]

[0491] [Example 6-1]

[0492] Example 6-1 is an example in which an EX group EX is inserted into the zoom lens of Example 6. The structure of the zoom lens of Example 6-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. Figure 27 The zoom lens of Example 6-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 6, instead of the final lens group GE of Example 6. The other lens groups and group structures of Example 6-1 are the same as those of the zoom lens of Example 6.

[0493] Regarding the zoom lens of Example 6-1, basic lens data are shown in Tables 34A and 34B, specifications and variable surface spacing are shown in Table 35, aspheric coefficients are shown in Table 36, and various aberration diagrams are shown in Table 37. Figure 28 middle.

[0494] [Table 34A]

[0495] Example 6-1

[0496] Sn R D Nd v d θg, F *1 139.1704 2.5500 1.80100 34.97 0.58642 2 33.7302 27.1363 3 -88.2466 1.2500 1.51633 64.14 0.53531 4 119.3390 2.3572 5 86.9791 6.7435 1.89286 20.36 0.63944 6 -2337.2722 3.7902 7 -117.9014 1.2000 1.67790 55.34 0.54726 8 535.9838 1.0939 9 136.4451 10.0421 1.53775 74.70 0.53936 *10 -72.6276 5.3092 11 252.8044 1.5600 1.85451 25.15 0.61031 12 53.1537 12.0307 1.43700 95.10 0.53364 13 -370.1077 0.3006 14 98.8219 10.0835 1.43700 95.10 0.53364 15 -130.3712 0.1208 16 1531.8763 7.5967 1.69680 55.53 0.54341 *17 -82.0029 DD

[17] *18 -154.7477 0.9183 1.77250 49.62 0.55038 19 40.1804 3.3180 20 -95.1389 0.8109 1.72916 54.54 0.54535 21 35.9801 5.2634 1.73037 32.23 0.58996 22 -57.2431 0.7481 23 -40.0675 0.8005 1.60300 65.44 0.54022 24 117.2516 DD

[24] 25 -46.6396 0.8106 1.72916 54.54 0.54535 26 70.9636 2.4498 1.80518 25.46 0.61572 27 1074.6394 DD

[27] *28 70.1392 5.0554 1.77250 49.62 0.55038 29 -77.8250 DD

[29]

[0497] [Table 34B]

[0498] Example 6-1

[0499] Sn R D Nd v d θg, F 30(St) ∞ 1.0009 31 126.0843 0.9370 1.67300 38.26 0.57580 32 48.8610 6.1430 1.67790 55.35 0.54339 33 -96.1693 0.1200 34 451.2294 4.9080 1.55200 70.70 0.54219 35 -47.0054 0.9229 1.90366 31.31 0.59481 36 809.5591 0.9694 37 28.7540 6.0409 1.65670 62.28 0.54205 38 184.2593 0.5530 39 43.5461 0.8316 2.00100 29.13 0.59952 40 21.3284 6.9988 1.60562 43.71 0.57214 41 -184.1688 0.1200 42 -163.3462 0.8004 1.95375 32.32 0.59015 43 16.6387 8.0154 1.75520 27.53 0.60987 44 -76.3539 0.9831 45 -66.5376 0.8003 1.72916 54.54 0.54535 46 24.0033 2.2600 1.72825 28.32 0.60755 47 34.3455 7.0285 48 90.1048 6.3832 1.51823 58.90 0.54567 49 -61.9710 7.4481 50 210.5191 7.2286 1.80809 22.76 0.63073 51 -31.1005 0.8003 1.91082 35.25 0.58224 52 207.5564 0.2526 53 67.8636 7.9318 1.43700 95.10 0.53364 54 -31.8559 0.8009 2.00100 29.13 0.59952 55 77.4776 0.1202 56 57.3831 9.1760 1.48071 85.29 0.53623 57 -31.3986 6.4633 58 -39.0821 0.9231 1.88300 40.76 0.56679 59 -66.7468 2.9129 60 91.5278 2.8950 1.84666 23.84 0.62012 61 745.9052 20.0000 62 ∞ 5.7000 1.51633 64.14 0.53531 63 ∞ 13.2251

[0500] [Table 35]

[0501] Example 61

[0502] Wide Middle Tele Zr 1.0 3.4 6.9 f 21.49 73.31 147.83 FNo. 4.12 4.12 5.47 2ω[°] 91.6 30.2 15.4 DD

[17] 0.8871 46.0357 61.2144 DD

[24] 37.5436 3.5827 4.0925 DD

[27] 3.7954 8.8450 0.7885 DD

[29] 25.2585 9.0213 1.3892

[0503] [Table 36]

[0504] Example 6-1

[0505]

[0506] [Example 7]

[0507] The structure and movement trajectory of the zoom lens of Example 7 are shown in FIG. Figure 29 The zoom lens of Example 7 comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group GM, and a final lens group GE having positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN and an N lens group GN having negative refractive power. The negative lens group UN is composed of a lens group having a single negative refractive power.

[0508] When zooming from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative lens group UN and the N lens group GN move along the optical axis Z while changing the intervals between them and the adjacent lens groups.

[0509] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0510] Regarding the zoom lens of Example 7, basic lens data are shown in Tables 37A and 37B, specifications and variable surface spacing are shown in Table 38, aspheric coefficients are shown in Table 39, and various aberration diagrams are shown in Table 37A and Table 37B. Figure 30 middle.

[0511] [Table 37A]

[0512] Example 7

[0513] Sn R D Nd v d θg, F *1 85.9515 3.0000 1.83441 37.28 0.57732 2 33.4864 29.0231 3 -88.2466 1.2486 1.48749 70.24 0.53007 4 112.9115 3.2577 5 79.5315 7.1560 1.89286 20.36 0.63944 6 1233.4109 5.7077 7 -127.2012 1.2158 1.65253 39.48 0.57318 8 290.6327 1.0168 9 108.2559 9.2008 1.55032 75.50 0.54001 *10 -97.4966 6.0310 11 263.2843 1.7159 1.85478 24.80 0.61232 12 52.7628 8.8452 1.43875 94.66 0.53402 13 1981.1310 0.3006 14 76.0224 9.4848 1.43875 94.66 0.53402 15 -128.3414 7.1193 16 277.2455 6.5272 1.72916 54.68 0.54451 *17 -86.9432 DD

[17] *18 -128.8437 0.9782 1.72916 54.68 0.54451 19 27.0579 4.4547 20 -391.7811 0.8509 1.67003 47.14 0.56262 21 23.0107 6.3993 1.77047 29.74 0.59514 22 -120.3047 5.6623 23 -23.5164 0.5004 1.59410 60.47 0.55516 24 -54.8423 DD

[24] 25 -46.9044 0.8411 1.71700 47.93 0.56062 26 93.9733 2.0940 1.80809 22.76 0.63073 27 -887.5121 DD

[27]

[0514] [Table 37B]

[0515] Example 7

[0516] Sn R D Nd v d ​ ​ ∞ 1.0000 *29 68.9382 4.4231 1.72916 54.68 0.54451 30 -72.4156 0.1221 31 161.3231 3.2306 1.63854 55.38 0.54858 32 -79.1405 0.1200 33 -2652.3227 4.0780 1.59522 67.73 0.54426 34 -40.3708 0.9185 1.91650 31.60 0.59117 35 1290.0880 35.7359 36 119.5194 6.7235 1.57135 52.95 0.55544 37 -57.4818 4.4470 38 ∞ 2.5476 1.80809 22.76 0.63073 39 -93.8462 1.0254 1.95375 32.32 0.59056 40 -300.9112 3.9523 41 89.8053 7.2250 1.43875 94.66 0.53402 42 -31.0847 0.8840 2.00100 29.14 0.59974 43 313.1012 1.3360 44 67.1504 7.2064 1.43875 94.66 0.53402 45 -35.4551 1.6570 46 -39.6414 0.8951 1.85150 40.78 0.56958 47 1018.2730 2.9973 1.80809 22.76 0.63073 48 -70.5158 20.0000 49 ∞ 5.7000 1.51633 64.14 0.53531 50 ∞ 16.2546

[0517] [Table 38]

[0518] Example 7

[0519] ​ ​ ​ Zr 1.0 2.8 5.0 f 16.01 44.59 80.06 ​ 2.75 2.75 3.11 ​ 87.4 34.4 19.6 ​ 0.9347 31.8719 43.0554 ​ 42.7347 7.1995 1.8392 ​ 2.1893 6.7873 0.9641

[0520] [Table 39]

[0521] Example 7

[0522]

[0523] [Example 7-1]

[0524] Example 7-1 is an example in which an EX group EX is inserted into the zoom lens of Example 7. The structure of the zoom lens of Example 7-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. ​ The zoom lens of Example 7-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 7, instead of the final lens group GE of Example 7. The other lens groups and group structures of Example 7-1 are the same as those of the zoom lens of Example 7.

[0525] Regarding the zoom lens of Example 7-1, basic lens data are shown in Tables 40A and 40B, specifications and variable surface spacing are shown in Table 41, aspheric coefficients are shown in Table 42, and various aberration diagrams are shown in Table 43. ​ middle.

[0526] [Table 40A]

[0527] Example 7-1

[0528] ​ R D ​ ​ ​ *1 85.9515 3.0000 1.83441 37.28 0.57732 2 33.4864 29.0231 3 -88.2466 1.2486 1.48749 70.24 0.53007 4 112.9115 3.2577 5 79.5315 7.1560 1.89286 20.36 0.63944 6 1233.4109 5.7077 7 -127.2012 1.2158 1.65253 39.48 0.57318 8 290.6327 1.0168 9 108.2559 9.2008 1.55032 75.50 0.54001 *10 -97.4966 6.0310 11 263.2843 1.7159 1.85478 24.80 0.61232 12 52.7628 8.8452 1.43875 94.66 0.53402 13 1981.1310 0.3006 14 76.0224 9.4848 1.43875 94.66 0.53402 15 -128.3414 7.1193 16 277.2455 6.5272 1.72916 54.68 0.54451 *17 -86.9432 ​ *18 -128.8437 0.9782 1.72916 54.68 0.54451 19 27.0579 4.4547 20 -391.7811 0.8509 1.67003 47.14 0.56262 21 23.0107 6.3993 1.77047 29.74 0.59514 22 -120.3047 5.6623 23 -23.5164 0.5004 1.59410 60.47 0.55516 24 -54.8423 ​ 25 -46.9044 0.8411 1.71700 47.93 0.56062 26 93.9733 2.0940 1.80809 22.76 0.63073 27 -887.5121 ​

[0529] [Table 40B]

[0530] Example 7-1

[0531] ​ R D ​ ​ ​ ​ ∞ 1.0000 *29 68.9382 4.4231 1.72916 54.68 0.54451 30 -72.4156 0.1221 31 161.3231 3.2306 1.63854 55.38 0.54858 32 -79.1405 0.1200 33 -2652.3227 4.0780 1.59522 67.73 0.54426 34 -40.3708 0.9185 1.91650 31.60 0.59117 35 1290.0880 1.7393 36 29.7284 4.5024 1.63246 63.77 0.54215 37 122.3167 1.4395 38 38.0426 1.0036 2.05090 26.94 0.60519 39 19.8731 8.2333 1.58144 40.89 0.57680 40 -221.1174 0.0610 41 -241.3164 0.8066 1.83400 37.21 0.58082 42 18.0176 7.4990 1.69895 30.05 0.60282 43 -81.5797 0.8932 44 -92.7696 0.8119 1.76385 48.49 0.55898 45 23.5363 1.7201 1.76182 26.52 0.61361 46 31.4657 7.0260 47 119.5194 6.7235 1.57135 52.95 0.55544 48 -57.4818 4.4470 49 ∞ 2.5476 1.80809 22.76 0.63073 50 -93.8462 1.0254 1.95375 32.32 0.59056 51 -300.9112 3.9523 52 89.8053 7.2250 1.43875 94.66 0.53402 53 -31.0847 0.8840 2.00100 29.14 0.59974 54 313.1012 1.3360 55 67.1504 7.2064 1.43875 94.66 0.53402 56 -35.4551 1.6570 57 -39.6414 0.8951 1.85150 40.78 0.56958 58 1018.2730 2.9973 1.80809 22.76 0.63073 59 -70.5158 20.0000 60 ∞ 5.7000 1.51633 64.14 0.53531 61 ∞ 16.2294

[0532] [Table 41]

[0533] Example 71

[0534] ​ ​ ​ Zr 1.0 2.8 5.0 f 23.51 65.47 117.55 ​ 4.12 4.12 4.56 ​ 85.6 33.6 19.0 ​ 0.9347 31.8719 43.0554 ​ 42.7347 7.1995 1.8392 ​ 2.1893 6.7873 0.9641

[0535] [Table 42]

[0536] Example 7-1

[0537]

[0538] [Example 8]

[0539] The structure and movement trajectory of the zoom lens of Example 8 are shown in FIG. ​The zoom lens of Example 8 comprises, in order from the object side to the image side, a first lens group G1 with positive refractive power, an intermediate lens group GM, and a final lens group GE with positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN with negative refractive power as a whole, an N lens group GN with negative refractive power, and a P lens group GP with positive refractive power. The negative lens group UN comprises, in order from the object side to the image side, a second lens group G2 with positive refractive power and a third lens group G3 with negative refractive power.

[0540] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the second lens group G2, the third lens group G3, the N lens group GN and the P lens group GP change the distance between them and the adjacent lens groups and move along the optical axis Z.

[0541] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0542] Regarding the zoom lens of Example 8, basic lens data are shown in Tables 43A and 43B, specifications and variable surface spacing are shown in Table 44, aspheric coefficients are shown in Table 45, and various aberration diagrams are shown in Table 46. ​ middle.

[0543] [Table 43A]

[0544] Example 8

[0545] ​ R D ​ ​ ​ *1 120.8422 1.5711 1.83441 37.28 0.57732 2 33.7772 30.8705 3 -89.1379 1.1593 1.51860 69.89 0.53184 4 149.3277 3.1773 5 87.7079 5.9846 1.89286 20.36 0.63944 6 ∞ 4.0597 7 -116.7329 1.1422 1.74400 44.79 0.56560 8 392.7371 0.8969 9 136.4430 9.8933 1.53775 74.70 0.53936 *10 -70.8885 4.5966 11 336.3778 1.7207 1.85451 25.15 0.61031 12 55.3762 8.8280 1.43875 94.66 0.53402 13 580.7668 0.9083 14 99.6641 9.5020 1.43875 94.66 0.53402 15 -134.3340 0.1210 16 396.1249 7.9108 1.69680 55.53 0.54341 *17 -86.4971 ​ 18 465.9621 2.4174 1.48749 70.24 0.53007 19 -447.2455 ​ *20 -165.8040 0.8444 1.77250 49.60 0.55212 21 41.6928 3.0713 22 -109.1789 0.8108 1.72916 54.68 0.54451 23 52.0658 4.1618 1.78880 28.43 0.60092 24 -54.7222 0.7890 25 -38.4949 0.5000 1.69680 55.53 0.54341 26 90.0948 ​ 27 -46.0692 0.8101 1.75500 52.32 0.54757 28 73.0308 2.1416 1.80518 25.42 0.61616 29 ∞ ​ *30 64.5347 4.9192 1.75500 52.32 0.54757 31 -78.0894 ​

[0546] [Table 43B]

[0547] Example 8

[0548] ​ R D ​ ​ ​ ​ ∞ 1.0004 33 131.8706 4.4241 1.65160 58.54 0.53901 34 -58.5368 0.9992 1.61772 49.81 0.56035 35 -78.9419 0.1248 36 ∞ 4.6035 1.59522 67.73 0.54426 37 -40.5049 0.9788 1.91650 31.60 0.59117 38 ∞ 36.9014 39 101.3309 5.8513 1.57135 52.95 0.55544 40 -58.7038 5.0404 41 ∞ 4.0124 1.80809 22.76 0.63073 42 -47.7221 1.1999 1.95375 32.32 0.59056 43 542.0212 6.5359 44 195.3637 7.5401 1.43875 94.66 0.53402 45 -24.6287 0.8939 2.00100 29.14 0.59974 46 -139.9530 1.1599 47 98.4716 7.6799 1.43875 94.66 0.53402 48 -31.6431 2.1882 49 -38.4869 0.9347 1.85150 40.78 0.56958 50 -156.8564 3.0338 1. 80809 22.76 0.63073 51 -50.0062 20.0000 52 ∞ 5.7000 1.51633 64.14 0.53531 53 ∞ 18.9150

[0549] [Table 44]

[0550] Example 8

[0551] ​ ​ ​ Zr 1.0 3.4 6.8 f 14.10 47.90 96.34 ​ 2.75 2.74 3.68 ​ 95.2 32.0 16.4 ​ 0.8707 11.4537 12.4399 ​ 1.2151 34.9401 48.6612 ​ 39.8438 4.4021 3.7245 ​ 3.2270 8.5529 0.7606 ​ 21.7077 7.5154 1.2781

[0552] [Table 45]

[0553] Example 8

[0554]

[0555] [Example 8-1]

[0556] Example 8-1 is an example in which an EX group EX is inserted into the zoom lens of Example 8. The structure of the zoom lens of Example 8-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. ​ The zoom lens of Example 8-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 8, replacing the final lens group GE of Example 8. The other lens groups and group structures of Example 8-1 are the same as those of the zoom lens of Example 8.

[0557] Regarding the zoom lens of Example 8-1, basic lens data are shown in Tables 46A and 46B, specifications and variable surface spacing are shown in Table 47, aspheric coefficients are shown in Table 48, and various aberration diagrams are shown in Table 49. ​ middle.

[0558] [Table 46A]

[0559] Example 8-1

[0560] ​ R D ​ ​ ​ *1 120.8422 1.5711 1.83441 37.28 0.57732 2 33.7772 30.8705 3 89.1379 1.1593 1.51860 69.89 0.53184 4 149.3277 3.1773 5 87.7079 5.9846 1.89286 20.36 0.63944 6 ∞ 4.0597 7 -116.7329 1.1422 1.74400 44.79 0.56560 8 392.7371 0.8969 9 136.4430 9.8933 1.53775 74.70 0.53936 *10 -70.8885 4.5966 11 336.3778 1.7207 1.85451 25.15 0.61031 12 55.3762 8.8280 1.43875 94.66 0.53402 13 580.7668 0.9083 14 99.6641 9.5020 1.43875 94.66 0.53402 15 -134.3340 0.1210 16 396.1249 7.9108 1.69680 55.53 0.54341 *17 -86.4971 ​ 18 465.9621 2.4174 1.48749 70.24 0.53007 19 -447.2455 ​ *20 -165.8040 0.8444 1.77250 49.60 0.55212 21 41.6928 3.0713 22 -109.1789 0.8108 1.72916 54.68 0.54451 23 52.0658 4.1618 1.78880 28.43 0.60092 24 -54.7222 0.7890 25 -38.4949 0.5000 1.69680 55.53 0.54341 26 90.0948 ​ 27 -46.0692 0.8101 1.75500 52.32 0.54757 28 73.0308 2.1416 1.80518 25.42 0.61616 29 ∞ ​ *30 64.5347 4.9192 1.75500 52.32 0.54757 31 -78.0894 ​

[0561] [Table 46B]

[0562] Example 8-1

[0563] ​ R D ​ ​ ​ ​ ∞ 1.0004 33 131.8706 4.4241 1.65160 58.54 0.53901 34 -58.5368 0.9992 1.61772 49.81 0.56035 35 -78.9419 0.1248 36 ∞ 4.6035 1.59522 67.73 0.54426 37 -40.5049 0.9788 1.91650 31.60 0.59117 38 ∞ 2.9029 39 29.4126 5.1341 1.63246 63.77 0.54215 40 130.6209 0.4668 41 39.5904 1.3446 2.00100 29.13 0.59952 42 19.6078 8.3044 1.56732 42.82 0.57309 43 -229.9442 0.0855 44 -209.5892 0.9057 1.83400 37.16 0.57759 45 17.4699 7.5231 1.69895 30.05 0.60282 46 -80.5678 0.7748 47 -88.5302 0.8010 1.76385 48.49 0.55898 48 25.3848 1.8082 1.76182 26.52 0.61361 49 33.3874 6.8503 50 101.3309 5.8513 1.57135 52.95 0.55544 51 -58.7038 5.0404 52 ∞ 4.0124 1.80809 22.76 0.63073 53 -47.7221 1.1999 1.95375 32.32 0.59056 54 542.0212 6.5359 55 195.3637 7.5401 1.43875 94.66 0.53402 56 -24.6287 0.8939 2.00100 29.14 0.59974 57 -139.9530 1.1599 58 98.4716 7.6799 1.43875 94.66 0.53402 59 -31.6431 2.1882 60 -38.4869 0.9347 1.85150 40.78 0.56958 61 -156.8564 3.0338 1.80809 22.76 0.63073 62 -50.0062 20.0000 63 ∞ 5.7000 1.51633 64.14 0.53531 64 ∞ 18.8909

[0564] [Table 47]

[0565] Example 8-1

[0566] ​ ​ ​ Zr 1.0 3.4 6.8 f 20.56 69.83 140.44 ​ 4.12 4.12 5.36 ​ 94.0 31.6 16.0 ​ 0.8707 11.4537 12.4399 ​ 1.2151 34.9401 48.6612 ​ 39.8438 4.4021 3.7245 ​ 3.2270 8.5529 0.7606 ​ 21.7077 7.5154 1.2781

[0567] [Table 48]

[0568] Example 8-1

[0569]

[0570] [Example 9]

[0571] The structure and movement trajectory of the zoom lens of Example 9 are shown in FIG. ​ The zoom lens of Example 9 comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group GM, and a final lens group GE having positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN, an N lens group GN having negative refractive power, and a P lens group GP having positive refractive power. The negative lens group UN is composed of a lens group having a single negative refractive power.

[0572] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the negative group UN, N lens group GN and P lens group GP change the intervals between their adjacent lens groups and move along the optical axis Z.

[0573] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0574] Regarding the zoom lens of Example 9, basic lens data are shown in Tables 49A and 49B, specifications and variable surface spacing are shown in Table 50, aspheric coefficients are shown in Table 51, and various aberration diagrams are shown in Table 52. ​ middle.

[0575] [Table 49A]

[0576] Example 9

[0577] ​ R D ​ ​ ​ *1 138.6080 2.5513 1.83441 37.28 0.57732 2 33.3940 28.7955 3 -91.4595 1.1762 1.53996 59.46 0.54418 4 131.9873 2.7028 5 88.3497 5.9255 1.89286 20.36 0.63944 6 ∞ 3.4442 7 -123.8096 1.1475 1.69680 55.53 0.54341 8 452.1659 2.1987 9 134.1711 9.7432 1.55032 75.50 0.54001 *10 -70.6611 4.4986 11 257.8720 1.7523 1.85451 25.15 0.61031 12 53.3606 9.6831 1.43875 94.66 0.53402 13 1993.4760 0.3155 14 97.5108 9.8857 1.43875 94.66 0.53402 15 -120.0509 0.1208 16 275.1150 8.1747 1.69560 59.05 0.54348 *17 -87.5462 ​ *18 -249.3051 0.8480 1.81600 46.62 0.55682 19 38.0807 3.4139 20 -111.4187 0.8100 1.72916 54.68 0.54451 21 23.0842 5.7540 1.73037 32.23 0.58996 22 -67.8385 0.9795 23 -38.4666 0.5000 1.60300 65.44 0.54022 24 111.4613 ​ 25 -45.7767 0.8105 1.75500 52.32 0.54757 26 73.1472 1.9916 1.80518 25.42 0.61616 27 ∞ ​ ​ ∞ 1.0008 *29 64.0730 4.4921 1.77250 49.60 0.55212 30 -78.5715 ​

[0578] [Table 49B]

[0579] Example 9

[0580] ​ R D ​ ​ ​ 31 129.5565 5.4594 1.60300 65.44 0.54022 32 -56.4773 1.0026 1.63980 34.47 0.59233 33 -79.9120 0.1994 34 ∞ 4.8055 1.59522 67.73 0.54426 35 -41.2970 0.9827 1.91650 31.60 0.59117 36 ∞ 37.4337 37 93.4152 5.5150 1.57135 52.95 0.55544 38 -59.2241 6.3606 39 ∞ 4.0018 1.80809 22.76 0.63073 40 -48.5873 1.0546 1.95375 32.32 0.59056 41 597.0901 4.1035 42 230.0813 7.8547 1.43875 94.66 0.53402 43 -24.0404 0.9652 2.00100 29.14 0.59974 44 -141.3416 0.5009 45 85.3417 8.0715 1.43875 94.66 0.53402 46 -31.4403 1.5014 47 -38.5866 0.9414 1.85150 40.78 0.56958 48 -321.8311 3.4494 1.80809 22.76 0.63073 49 -51.6334 20.0000 50 ∞ 5.7000 1.51633 64.14 0.53531 51 ∞ 18.6679

[0581] [Table 50]

[0582] Example 9

[0583] ​ ​ ​ Zr 1.0 3.5 7.2 f 13.29 46.87 96.32 ​ 2.74 2.80 3.73 ​ 99.0 32.6 16.2 ​ 1.0925 43.8497 57.7357 ​ 38.9073 3.7243 3.4807 ​ 4.3564 9.4606 1.0905 ​ 19.3392 6.6608 1.3885

[0584] [Table 51]

[0585] Example 9

[0586]

[0587] [Example 9-1]

[0588] Example 9-1 is an example in which an EX group EX is inserted into the zoom lens of Example 9. The structure of the zoom lens of Example 9-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. ​The zoom lens of Example 9-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 9, instead of the final lens group GE of Example 9. The other lens groups and group structures of Example 9-1 are the same as those of the zoom lens of Example 9.

[0589] Regarding the zoom lens of Example 9-1, basic lens data are shown in Tables 52A and 52B, specifications and variable surface spacing are shown in Table 53, aspheric coefficients are shown in Table 54, and various aberration diagrams are shown in Table 55. ​ middle.

[0590] [Table 52A]

[0591] Example 9-1

[0592] ​ R D ​ ​ ​ *1 138.6080 2.5513 1.83441 37.28 0.57732 2 33.3940 28.7955 3 -91.4595 1.1762 1.53996 59.46 0.54418 4 131.9873 2.7028 5 88.3497 5.9255 1.89286 20.36 0.63944 6 ∞ 3.4442 7 -123.8096 1.1475 1.69680 55.53 0.54341 8 452.1659 2.1987 9 134.1711 9.7432 1.55032 75.50 0.54001 *10 -70.6611 4.4986 11 257.8720 1.7523 1.85451 25.15 0.61031 12 53.3606 9.6831 1.43875 94.66 0.53402 13 1993.4760 0.3155 14 97.5108 9.8857 1.43875 94.66 0.53402 15 -120.0509 0.1208 16 275.1150 8.1747 1.69560 59.05 0.54348 *17 -87.5462 DD

[17] *18 -249.3051 0.8480 1.81600 46.62 0.55682 19 38.0807 3.4139 20 -111.4187 0.8100 1.72916 54.68 0.54451 21 23.0842 5.7540 1.73037 32.23 0.58996 22 -67.8385 0.9795 23 -38.4666 0.5000 1.60300 65.44 0.54022 24 111.4613 DD

[24] 25 -45.7767 0.8105 1.75500 52.32 0.54757 26 73.1472 1.9916 1.80518 25.42 0.61616 27 ∞ DD

[27] 28(St) ∞ 1.0008 *29 64.0730 4.4921 1.77250 49.60 0.55212 30 -78.5715 DD

[30]

[0593] [Table 52B]

[0594] Example 9-1

[0595] Sn R D Nd vd 0g, F 31 129.5565 5.4594 1.60300 65.44 0.54022 32 -56.4773 1.0026 1.63980 34.47 0.59233 33 -79.9120 0.1994 34 ∞ 4.8055 1.59522 67.73 0.54426 35 -41.2970 0.9827 1.91650 31.60 0.59117 36 ∞ 2.5507 37 28.7827 4.8989 1.63246 63.77 0.54215 38 125.9162 1.1531 39 39.5531 0.9203 2.00100 29.13 0.59952 40 19.1357 8.4888 1.56732 42.82 0.57309 41 -243.9620 0.0855 42 -220.6294 0.8706 1.83400 37.16 0.57759 43 16.8809 7.6435 1.69895 30.05 0.60282 44 -91.5929 1.5583 45 -99.0456 0.8009 1.76385 48.49 0.55898 46 23.3317 1.8834 1.76182 26.52 0.61361 47 33.5582 6.5797 48 93.4152 5.5150 1.57135 52.95 0.55544 49 -59.2241 6.3606 50 ∞ 4.0018 1.80809 22.76 0.63073 51 -48.5873 1.0546 1.95375 32.32 0.59056 52 597.0901 4.1035 53 230.0813 7.8547 1.43875 94.66 0.53402 54 -24.0404 0.9652 2.00100 29.14 0.59974 55 -141.3416 0.5009 56 85.3417 8.0715 1.43875 94.66 0.53402 57 -31.4403 1.5014 58 -38.5866 0.9414 1.85150 40.78 0.56958 59 -321.8311 3.4494 1.80809 22.76 0.63073 60 -51.6334 20.0000 61 ∞ 5.7000 1.51633 64.14 0.53531 62 ∞ 18.6511

[0596] [Table 53]

[0597] Example 9-1

[0598] Wide Middle Tele Zr 1.0 3.5 7.2 f 19.82 69.92 143.69 FNo. 4.11 4.18 5.57 2ω[°] 96.6 31.4 15.6 DD

[17] 1.0925 43.8497 57.7357 DD

[24] 38.9073 3.7243 3.4807 DD

[27] 4.3564 9.4606 1.0905 DD

[30] 19.3392 6.6608 1.3885

[0599] [Table 54]

[0600] Example 9-1

[0601]

[0602] [Example 10]

[0603] The structure and movement trajectory of the zoom lens of Example 10 are shown in FIG. Figure 41 The zoom lens of Example 10 comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group GM, and a final lens group GE having positive refractive power. The intermediate lens group GM comprises, in order from the object side to the image side, a negative lens group UN having negative refractive power as a whole, an N lens group GN having negative refractive power, and a P lens group GP having positive refractive power. The negative lens group UN comprises, in order from the object side to the image side, a second lens group G2 having negative refractive power and a third lens group G3 having negative refractive power.

[0604] When changing magnification from the wide-angle end to the telephoto end, the first lens group G1 and the final lens group GE are fixed relative to the image plane Sim, and the second lens group G2, the third lens group G3, the N lens group GN and the P lens group GP change the distance between them and the adjacent lens groups and move along the optical axis Z.

[0605] The first lens group G1 comprises, from the object side to the image side, subgroup 1a G1a with negative refractive power, subgroup 1b G1b with positive refractive power, and subgroup 1c G1c with positive refractive power. The focusing group consists of subgroup 1b G1b. Subgroup 1b G1b consists of the fifth lens from the object side. When focusing from an object at infinity to the closest object, subgroup 1a G1a and subgroup 1c G1c are fixed relative to the image plane Sim, while subgroup 1b G1b moves toward the image side.

[0606] Regarding the zoom lens of Example 10, basic lens data are shown in Tables 55A and 55B, specifications and variable surface spacing are shown in Table 56, aspheric coefficients are shown in Table 57, and various aberration diagrams are shown in Table 58. Figure 42 middle.

[0607] [Table 55A]

[0608] Example 10

[0609] Sn R D Nd vd 0g, F *1 127.4108 1.6302 1.83441 37.28 0.57732 2 33.6395 27.2891 3 -88.4515 1.1906 1.51633 64.14 0.53531 4 138.8223 2.6984 5 87.4210 6.4076 1.89286 20.36 0.63944 6 ∞ 4.8064 7 -123.0389 1.5349 1.69930 51.11 0.55523 8 418.6259 1.7781 9 126.2041 10.7059 1.53775 74.70 0.53936 *10 -72.8046 4.7328 11 273.6934 1.7572 1.85451 25.15 0.61031 12 53.9078 9.9212 1.43875 94.66 0.53402 13 2777.0761 0.3156 14 95.3274 10.4524 1.43875 94.66 0.53402 15 -116.4440 0.3221 16 327.8390 8.1735 1.69680 55.53 0.54341 *17 -86.9425 DD

[17] *18 -224.5999 0.8835 1.80400 46.58 0.55730 19 40.1560 3.2653 20 -121.1551 0.8106 1.72916 54.68 0.54451 21 31.7375 5.0648 1.77047 29.74 0.59514 22 -73.8794 DD

[22] 23 -39.7524 0.5002 1.65160 58.54 0.53901 24 107.3017 DD

[24] 25 -45.9567 0.8109 1.74100 52.64 0.54676 26 88.2461 1.9120 1.80518 25.42 0.61616 27 -3153.4230 DD

[27] *28 64.9014 4.5739 1.77250 49.60 0.55212 29 77.5418 DD

[29]

[0610] [Table 55B]

[0611] Example 10

[0612] Sn R D Nd vd θg,F 30(St) ∞ 1.0048 31 129.3579 3.8837 1.60300 65.44 0.54022 32 -67.8085 0.9523 1.63980 34.47 0.59233 33 -79.4395 0.1209 34 ∞ 4.2251 1.59522 67.73 0.54426 35 -41.2673 0.9435 1.91650 31.60 0.59117 36 ∞ 34.9005 37 94.8026 6.0985 1.57135 52.95 0.55544 38 -59.6568 5.9861 39 ∞ 5.1648 1.80809 22.76 0.63073 40 -49.9073 0.9821 1.95375 32.32 0.59056 41 698.9007 5.2692 42 218.5362 8.3351 1.43875 94.66 0.53402 43 -24.2386 0.9992 2.00100 29.14 0.59974 44 -137.9794 0.5180 45 91.8306 7.6826 1.43875 94.66 0.53402 46 -31.4152 0.9787 47 -38.7278 1.0071 1.85150 40.78 0.56958 48 -246.6761 3.3666 1. 80809 22.76 0.63073 49 -50.9852 20.0000 50 ∞ 5.7000 1.51633 64.14 0.53531 51 ∞ 18.7842

[0613] [Table 56]

[0614] Example 10

[0615] Wide Middle Tele Zr 1.0 3.4 6.9 f 14.05 47.86 96.44 FNo. 2.75 2.75 3.62 2ω[°] 95.6 32.0 16.4 DD

[17] 1.0224 42.5664 55.8361 DD

[22] 1.8985 3.2279 4.8935 DD

[24] 38.8387 4.1612 3.5362 DD

[27] 3.5020 8.6747 0.7741 DD

[29] 21.1988 7.8302 1.4204

[0616] [Table 57]

[0617] Example 10

[0618]

[0619] [Example 10-1]

[0620] Example 10-1 is an example in which an EX group EX is inserted into the zoom lens of Example 10. The structure of the zoom lens of Example 10-1 in the wide-angle end state and the cross-sectional view of the light beam are shown in FIG. Figure 43 The zoom lens of Example 10-1 has a final lens group GEE in which the EX group EX is inserted inside the final lens group GE of Example 10, replacing the final lens group GE of Example 10. The other lens groups and group structures of Example 10-1 are the same as those of the zoom lens of Example 10.

[0621] Regarding the zoom lens of Example 10-1, basic lens data are shown in Tables 58A and 58B, specifications and variable surface spacing are shown in Table 59, aspheric coefficients are shown in Table 60, and various aberration diagrams are shown in Table 61. Figure 44 middle.

[0622] [Table 58A]

[0623] Example 10-1

[0624] Sn R D Nd vd θg,F *1 127.4108 1.6302 1.83441 37.28 0.57732 2 33.6395 27.2891 3 -88.4515 1.1906 1.51633 64.14 0.53531 4 138.8223 2.6984 5 87.4210 6.4076 1.89286 20.36 0.63944 6 ∞ 4.8064 7 -123.0389 1.5349 1.69930 51.11 0.55523 8 418.6259 1.7781 9 126.2041 10.7059 1.53775 74.70 0.53936 *10 -72.8046 4.7328 11 273.6934 1.7572 1.85451 25.15 0.61031 12 53.9078 9.9212 1.43875 94.66 0.53402 13 2777.0761 0.3156 14 95.3274 10.4524 1.43875 94.66 0.53402 15 -116.4440 0.3221 16 327.8390 8.1735 1.69680 55.53 0.54341 *17 -86.9425 DD

[17] *18 -224.5999 0.8835 1.80400 46.58 0.55730 19 40.1560 3.2653 20 -121.1551 0.8106 1.72916 54.68 0.54451 21 31.7375 5.0648 1.77047 29.74 0.59514 22 -73.8794 DD

[22] 23 -39.7524 0.5002 1.65160 58.54 0.53901 24 107.3017 DD

[24] 25 -45.9567 0.8109 1.74100 52.64 0.54676 26 88.2461 1.9120 1.80518 25.42 0.61616 27 -3153.4230 DD

[27] *28 64.9014 4.5739 1.77250 49.60 0.55212 29 -77.5418 DD

[29]

[0625] [Table 58B]

[0626] Example 10-1

[0627] Sn R D Nd vd θg,F 30(St) ∞ 1.0048 31 129.3579 3.8837 1.60300 65.44 0.54022 32 -67.8085 0.9523 1.63980 34.47 0.59233 33 -79.4395 0.1209 34 ∞ 4.2251 1.59522 67.73 0.54426 35 -41.2673 0.9435 1.91650 31.60 0.59117 36 ∞ 0.8000 37 28.9820 4.6707 1.63246 63.77 0.54215 38 130.3019 0.7639 39 39.4319 1.3062 2.00100 29.13 0.59952 40 19.5762 8.4240 1.56732 42.82 0.57309 41 -221.2816 0.2484 42 -208.3303 0.9402 1.83400 37.16 0.57759 43 16.7492 7.6101 1.69895 30.05 0.60282 44 -81.5731 0.9662 45 -86.6377 0.8103 1.76385 48.49 0.55898 46 24.7496 1.7274 1.76182 26.52 0.61361 47 33.2004 6.6332 48 94.8026 6.0985 1.57135 52.95 0.55544 49 -59.6568 5.9861 50 ∞ 5.1648 1.80809 22.76 0.63073 51 -49.9073 0.9821 1.95375 32.32 0.59056 52 698.9007 5.2692 53 218.5362 8.3351 1.43875 94.66 0.53402 54 -24.2386 0.9992 2.00100 29.14 0.59974 55 -137.9794 0.5180 56 91.8306 7.6826 1.43875 94.66 0.53402 57 -31.4152 0.9787 58 -38.7278 1.0071 1.85150 40.78 0.56958 59 -246.6761 3.3666 1.80809 22.76 0.63073 60 -50.9852 20.0000 61 ∞ 5.7000 1.51633 64.14 0.53531 62 ∞ 18.7587

[0628] [Table 59]

[0629] Example 10-1

[0630] Wide Middle Tele Zr 1.0 3.4 6.9 f 20.90 71.22 143.50 FNo. 4.12 4.12 5.38 2ω[°] 93.4 31.0 15.8 DD

[17] 1.0224 42.5664 55.8361 DD

[22] 1.8985 3.2279 4.8935 DD

[24] 38.8387 4.1612 3.5362 DD

[27] 3.5020 8.6747 0.7741 DD

[29] 21.1988 7.8302 1.4204

[0631] [Table 60]

[0632] Example 10-1

[0633]

[0634] Tables 61 and 62 show the corresponding values ​​of conditional expressions (1) to (31) and (36) to (40) and the corresponding values ​​of IHw and ErL1 for the zoom lenses of Examples 1 to 10. The corresponding values ​​of conditional expressions (1) to (31) and (36) to (40) are the values ​​when the EX group EX is not inserted. Tables 63 and 64 show the corresponding values ​​of conditional expressions (32) to (35) related to the zoom lenses of Examples 1-1 to 10-1. The corresponding values ​​of the examples shown in Tables 61 to 64 can also be used as the upper limit or lower limit of the conditional expressions to set the preferred range of the conditional expressions.

[0635] [Table 61]

[0636] Formula No. Example 1 Example 2 Example 3 Example 4 Example 5 (1) fw / f1 0.3224 0.3145 0.3182 0.3432 0.3508 (2) H1f / Hft 0.3917 0.4059 0.3670 0.3527 0.4442 (3) HD1 / f1 1.9061 1.8402 1.8026 2.1836 1.6357 (4) f1 / f1b 0.5178 0.4595 0.4564 0.4921 0.5304 (5) H1r / f1 1.0825 1.1195 1.0490 1.1655 0.9635 (6) H1f / f1 1.2573 1.2424 1.2521 1.3062 1.1869 (7) N1p 1.89286 1.94594 1.92286 1.85896 1.89286 (8) v1p 20.36 17.98 20.88 22.73 20.36 (9) N1n 1.69680 - - - 1.66755 (10) v1n 55.53 - - - 41.87 (11) v 1nave 51.55 44.75 55.25 42.60 49.80 (12) θ1nave 0.5550 0.5659 0.5522 0.5693 0.5608 (13) Denw / fw 2.7429 2.6882 2.7748 2.6753 2.4498 (14) f1 / f1a -1.2736 -1.1934 -1.1173 -1.1163 -1.2468 (15) f1 / f1c 0.6192 0.6740 0.6644 0.6052 0.6595 (16) (R2-R3) / (R2+R3) -2.2226 -2.3885 -1.1070 -2.6573 -2.2326 (17) d1R / IHw 0.0684 0.0631 0.0544 0.0689 0.0702 (18) Denw / f1 0.8844 0.8454 0.8830 0.9183 0.8595 (19) Dent / f1 2.2306 2.2078 2.2366 2.3432 1.9913 (20) HD1 / DG1 0.9160 0.9374 0.8987 0.9394 0.8798 (21) FNot×ω1 29.7245 30.1557 29.5294 30.7252 30.3423 (22) Denw / IHw 2.7398 2.6508 2.7738 2.5724 2.6991 (23) Bfw / IHw 2.9188 3.2387 2.7623 3.2378 2.7579 (24) ωW 47.0869 47.4305 46.9856 48.0341 44.2685 (25) fw / ft 0.1454 0.1454 0.1454 0.1450 0.1778 (26) IHw / Dexw 0.0813 0.0893 0.0674 0.0641 0.1057 (27) βAmaxR 0.2048 0.1761 0.1726 0.1874 0.1962 (28) D1a / DG1 0.4794 0.4375 0.4465 0.4111 0.4825 (29) D1b / DG1 0.1128 0.0907 0.0986 0.1057 0.1047 (30) D1c / DG1 0.3336 0.3572 0.3778 0.3894 0.3081 (31) tL1 / ErL1 0.0615 0.0618 0.0611 0.0654 0.0597 (36) fN / f1 -1.4126 -1.3554 -1.3066 -1.7389 -1.3780 (37) fUN / f1 -0.5219 -0.5459 -0.5278 -0.6238 -0.5286 (38) fw / fUN -0.6178 -0.5761 -0.6030 -0.5503 -0.6637 (39) fw / fE 0.1824 0.1767 0.1873 0.1473 0.2236 (40) fw / fP 0.3088 0.3035 0.3086 0.2651 0.3363 IUs 14.5250 14.5250 14.5250 14.5250 14.5250 ErL1 40.9926 40.2911 40.9471 40.0018 37.8050

[0637] [Table 62]

[0638] Formula No. Example 6 Example 7 Example 8 Example 9 Example 10 (1) fw / f1 0.3086 0.3759 0.2633 0.3128 0.3238 (2) H1f / Hft 0.3911 0.4785 0.4366 0.3852 0.3885 (3) HD1 / f1 1.8261 1.8648 1.7539 2.0286 1.9984 (4) f1 / f1b 0.5249 0.4497 0.6071 0.4965 0.4957 (5) H1r / f1 1.0711 0.8977 1.1850 1.1512 1.1156 (6) H1f / f1 1.2246 1.4004 1.1551 1.2915 1.2779 (7) N1p 1.89286 1.89286 1.89286 1.89286 1.89286 (8) v1p 20.36 20.36 20.36 20.36 20.36 (9) N1n 1.67790 1.65253 1.74400 1.69680 1.69930 (10) v 1n 55.34 39.48 44.79 55.53 51.11 (11) v 1nave 51.48 49.00 50.65 50.76 50.85 (12) θ1nave 0.5563 0.5602 0.5583 0.5550 0.5560 (13) Denw / fw 2.7430 2.9712 2.8105 2.8235 2.7787 (14) f1 / f1a -1.3192 -1.0637 -1.5952 -1.2817 -1.2516 (15) f1 / f1c 0.6478 0.6483 0.6580 0.6046 0.6110 (16) (R2-R3) / (R2+R3) -2.2374 -2.2230 -2.2203 -2.1502 -2.2274 (17) d1R / IHw 0.0611 0.0643 0.0599 0.0752 0.0704 (18) Denw / f1 0.8464 1.1169 0.7399 0.8833 0.8998 (19) Dent / f1 2.1865 2.0868 1.7518 2.1368 2.2614 (20) HD1 / DG1 0.9224 0.7877 1.0174 0.9353 0.9249 (21) FNot×ω1 29.6140 31.0084 30.6204 30.9672 30.0900 (22) Denw / IHw 2.7424 3.2755 2.7287 2.5827 2.6868 (23) Bfw / IHw 2.5475 2.7544 2.9370 2.9199 2.9281 (24) ωW 47.1552 44.2765 48.0836 50.0502 48.3277 (25) fw / ft 0.1454 0.2002 0.1465 0.1380 0.1457 (26) IHw / Dexw 0.0807 0.1004 0.0758 0.0333 0.0810 (27) βAmaxR 0.2101 0.1925 0.2156 0.2170 0.1819 (28) D1a / DG1 0.4833 0.5018 0.5194 0.4966 0.4861 (29) D1b / DG1 0.1078 0.0912 0.1071 0.1058 0.1142 (30) D1c / DG1 0.3402 0.3371 0.3139 0.3249 0.3302 (31) tL1 / ErL1 0.0622 0.0714 0.0379 0.0606 0.0395 (36) fN / f1 -1.3867 -1.7548 -1.1894 -1.4900 -1.5239 (37) fUN / f1 -0.5086 -0.5678 -0.4656 -0.5269 -0.5286 (38) fw / fUN -0.6068 -0.6620 -0.5655 -0.5937 -0.6126 (39) fw / fE 0.1857 0.3997 0.1827 0.1656 0.1820 (40) fw / fP 0.2996 - 0.2969 0.2868 0.3028 IUs 14.5250 14.5250 14.5250 14.5250 14.5250 ErL1 41.0000 42.0000 41.4899 42.1071 41.2617

[0639] [Table 63]

[0640]

[0641] [Table 64]

[0642]

[0643] Despite their compact construction, the zoom lenses of Examples 1 to 10 boast a maximum image height of 14.5° or greater when focused on an object at infinity at the wide-angle end, demonstrating a large image circle. Furthermore, the zoom lenses of Examples 1 to 10 achieve a maximum half angle of view of 40° or greater when focused on an object at infinity at the wide-angle end, demonstrating a wide-angle configuration while maintaining high optical performance through excellent correction of various aberrations.

[0644] Next, an imaging device according to an embodiment of the present invention will be described. Figure 45 2 shows a schematic diagram of an imaging device 100 according to an embodiment of the present invention. The imaging device 100 includes a zoom lens 1 according to an embodiment of the present invention. Examples of the imaging device 100 include a video camera for filming movies, a broadcast camera, a surveillance camera, a digital camera, and a video camera.

[0645] The imaging device 100 includes a zoom lens 1, a filter 2 disposed on the image side of the zoom lens 1, and an imaging element 3 disposed on the image side of the filter 2. Figure 45 Zoom lens 1. The zoom lens 1 includes an EX group EX that is inserted into or removed from an optical path to change the focal length of the zoom lens while keeping an imaging position constant.

[0646] The imaging element 3 is an element that converts the optical image formed by the zoom lens 1 into an electrical signal. For example, a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) can be used. The imaging element 3 is configured so that its imaging surface is aligned with the image surface of the zoom lens 1. Figure 45 Although only one imaging element 3 is shown in the figure, the imaging device 100 may be a so-called three-panel imaging device including three imaging elements.

[0647] The imaging device 100 further includes a signal processing unit 4, a magnification control unit 5, and a focus control unit 6. The signal processing unit 4 performs computational processing on the output signal from the imaging element 3. The magnification control unit 5 controls the magnification of the zoom lens 1. The focus control unit 6 controls the focus of the zoom lens 1.

[0648] While the present invention has been described above using embodiments and examples, the present invention is not limited to these embodiments and examples and is capable of various modifications. For example, the radius of curvature, interplanar spacing, refractive index, Abbe number, and aspheric coefficient of each lens are not limited to the values ​​shown in the above embodiments and may employ other values.

[0649] The following supplementary notes are further disclosed with respect to the above-mentioned embodiments and examples.

[0650] [Note 1]

[0651] A zoom lens comprising: a first lens group disposed closest to the object side and having positive refractive power; an intermediate lens group comprising a plurality of lens groups; and a final lens group disposed closest to the image side.

[0652] When zooming, all the intervals between adjacent lens groups change.

[0653] The first lens group includes two negative lenses in order from the object side to the image side.

[0654] Of the two negative lenses, the negative lens on the object side is a meniscus lens with its convex surface facing the object side.

[0655] Let fw be the focal length of the entire system when focusing on an object at infinity at the wide-angle end.

[0656] And when the focal length of the first lens group is set to f1,

[0657] The following condition (1) is satisfied:

[0658] 0.1<fw / f1<0.8 (1).

[0659] [Note 2]

[0660] The zoom lens according to Supplementary Note 1, wherein

[0661] The distance on the optical axis from the lens surface of the first lens group closest to the object to the object-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1f.

[0662] The distance on the optical axis from the lens surface closest to the object of the first lens group to the object-side principal point position of the entire system when the lens is focused on an infinitely distant object at the telephoto end is Hft.

[0663] Regarding the signs of H1f and Hft, with the lens surface closest to the object side of the first lens group as a reference, the object side is negative and the image side is positive,

[0664] The condition (2) expressed as follows is satisfied:

[0665] 0.1<H1f / Hft<0.95 (2).

[0666] [Note 3]

[0667] The zoom lens according to Supplementary Note 1 or Supplementary Note 2, wherein the L1n lens is provided adjacent to the image side of the L1p lens, which is the most object-side positive lens among the positive lenses included in the first lens group, and has negative refractive power.

[0668] [Note 4]

[0669] The zoom lens according to any one of Supplementary Notes 1 to 3, wherein:

[0670] The distance on the optical axis from the lens surface of the first lens group closest to the object to the object-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1f.

[0671] The distance on the optical axis from the lens surface closest to the object of the first lens group to the object-side principal point position of the entire system when the lens is focused on an infinitely distant object at the telephoto end is Hft.

[0672] Regarding the signs of H1f and Hft, with the lens surface closest to the object side of the first lens group as a reference, the object side is negative and the image side is positive,

[0673] Satisfy the conditional formula (2-1) expressed as follows:

[0674] 0.28<H1f / Hft<0.7 (2-1).

[0675] [Note 5]

[0676] The zoom lens according to any one of Supplementary Notes 1 to 4, wherein:

[0677] When the distance on the optical axis between the object-side principal point position of the first lens group and the image-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is HD1,

[0678] The condition (3) expressed as follows is satisfied:

[0679] 1.4<HD1 / f1<2.16 (3).

[0680] [Note 6]

[0681] The zoom lens according to any one of Supplementary Notes 1 to 5, wherein

[0682] The first lens group includes, from the object side to the image side, sub-group 1a, sub-group 1b, and sub-group 1c.

[0683] During focusing, the interval between the subgroup 1a and the subgroup 1b changes, and the interval between the subgroup 1b and the subgroup 1c changes.

[0684] [Note 7]

[0685] The zoom lens according to Supplementary Note 6, wherein

[0686] When the focal length of the 1b subgroup is set to f1b,

[0687] The condition (4) expressed as follows is satisfied:

[0688] 0.3<f1 / f1b<1 (4).

[0689] [Note 8]

[0690] The zoom lens according to Supplementary Note 6 or 7, wherein

[0691] The lens closest to the image side of the sub-group 1a is a negative lens.

[0692] [Note 9]

[0693] The zoom lens according to Supplementary Note 8, wherein the positive lens is disposed adjacent to the object side of the negative lens closest to the image side in the 1a sub-group.

[0694] [Note 10]

[0695] The zoom lens according to any one of Supplementary Notes 6 to 9, wherein

[0696] The subgroup 1a has negative optical power.

[0697] [Note 11]

[0698] The zoom lens according to any one of Supplementary Notes 6 to 10, wherein

[0699] The subgroup 1b has positive optical power.

[0700] [Note 12]

[0701] The zoom lens according to any one of Supplementary Notes 6 to 11, wherein

[0702] The 1c-th subgroup has positive optical power.

[0703] [Note 13]

[0704] The zoom lens according to any one of Supplementary Notes 6 to 12, wherein:

[0705] When focusing from an infinitely distant object to a nearest object, the subgroup 1a and the subgroup 1c are fixed relative to the image plane, and the subgroup 1b moves toward the image side.

[0706] [Note 14]

[0707] The zoom lens according to any one of Supplementary Notes 1 to 13, wherein:

[0708] During zooming, the first lens group is fixed relative to the image plane.

[0709] [Note 15]

[0710] The zoom lens according to any one of Supplementary Notes 1 to 14, wherein

[0711] When changing magnification, the final lens group is fixed relative to the image plane.

[0712] [Note 16]

[0713] The zoom lens according to any one of Supplementary Notes 1 to 15, wherein:

[0714] The first lens group includes six or more lenses.

[0715] [Note 17]

[0716] The zoom lens according to any one of Supplementary Notes 1 to 16, comprising an aperture stop, wherein the aperture stop is fixed relative to the image plane during zooming.

[0717] [Note 18]

[0718] The zoom lens according to any one of Supplementary Notes 1 to 17, wherein:

[0719] The distance on the optical axis from the lens surface closest to the image side of the first lens group to the image side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1r.

[0720] Regarding the sign of H1r, with the lens surface closest to the image side of the first lens group as a reference, the object side is negative and the image side is positive.

[0721] The condition (5) expressed as follows is satisfied:

[0722] 0.7<H1r / f1<1.5 (5).

[0723] [Note 19]

[0724] The zoom lens according to any one of Supplementary Notes 1 to 18, wherein

[0725] The distance on the optical axis from the lens surface of the first lens group closest to the object to the object-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1f.

[0726] Regarding the sign of H1f, with the lens surface closest to the object side of the first lens group as a reference, the object side is negative and the image side is positive,

[0727] The condition (6) expressed as follows is satisfied:

[0728] 0.7<H1f / f1<2 (6).

[0729] [Note 20]

[0730] The zoom lens according to Supplementary Note 3, wherein

[0731] When the refractive index of the L1p lens with respect to the d-line is N1p,

[0732] The condition (7) expressed as follows is satisfied:

[0733] 1.7<N1p<2.1 (7).

[0734] [Note 21]

[0735] The zoom lens according to Supplementary Note 3 or 20, wherein

[0736] When the Abbe number based on the d-line of the L1p lens is v1p,

[0737] The condition (8) expressed as follows is satisfied:

[0738] 15<v1p<30 (8).

[0739] [Note 22]

[0740] The zoom lens according to Supplementary Note 3, wherein

[0741] When the refractive index of the L1n lens with respect to the d-line is N1n,

[0742] The condition (9) expressed as follows is satisfied:

[0743] 1.43<N1n<1.85 (9).

[0744] [Note 23]

[0745] The zoom lens according to Supplementary Note 3 or 22, wherein

[0746] When the Abbe number based on the d line of the L1n lens is v1n,

[0747] The condition (10) expressed as follows is satisfied:

[0748] 30<v1n<60 (10).

[0749] [Note 24]

[0750] The zoom lens according to Supplementary Note 3, wherein

[0751] When the average value of the Abbe numbers of all negative lenses on the object side of the L1p lens based on the d-line is defined as v 1nave,

[0752] The condition (11) expressed as follows is satisfied:

[0753] 35<v 1nave<60 (11).

[0754] [Note 25]

[0755] The zoom lens according to Supplementary Note 3, wherein

[0756] When the average value of the partial dispersion ratios between the g-line and the F-line of all the negative lenses on the object side of the L1p lens is θ 1nave,

[0757] The condition (12) expressed as follows is satisfied:

[0758] 0.5<θ1nave<0.6 (12).

[0759] [Note 26]

[0760] The zoom lens according to any one of Supplementary Notes 1 to 25, wherein

[0761] 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,

[0762] The condition (13) expressed as follows is satisfied:

[0763] 2<Denw / fw<3.5 (13).

[0764] [Note 27]

[0765] The zoom lens according to Supplementary Note 6, wherein

[0766] When the focal length of the 1a subgroup is set to f1a,

[0767] The condition (14) expressed as follows is satisfied:

[0768] -2<f1 / f1a<0 (14).

[0769] [Note 28]

[0770] The zoom lens according to Supplementary Note 6, wherein

[0771] When the focal length of the 1cth subgroup is set to f1c,

[0772] The condition (15) expressed as follows is satisfied:

[0773] 0.3<f1 / f1c<0.8 (15).

[0774] [Note 29]

[0775] The zoom lens according to any one of Supplementary Notes 1 to 28, wherein

[0776] When the paraxial curvature radius of the image-side surface of the lens closest to the object side of the first lens group is set to R2,

[0777] When the paraxial curvature radius of the object-side surface of the second lens from the object side of the first lens group is R3,

[0778] The condition (16) expressed as follows is satisfied:

[0779] -3<(R2-R3) / (R2+R3)<0 (16).

[0780] [Note 30]

[0781] The zoom lens according to any one of Supplementary Notes 1 to 29, wherein

[0782] In a state where the lens is focused on an object at infinity at the wide-angle end, the longest air gap among the air gaps on the optical axis included in the final lens group is defined as the longest air gap.

[0783] An EX group is arranged in an insertable and removable manner, and the EX group is inserted into the optical path of the longest air gap to change the focal length of the zoom lens while keeping the imaging position constant.

[0784] [Note 31]

[0785] The zoom lens according to Supplementary Note 30, wherein

[0786] By inserting or removing the EX group, the maximum image height changes.

[0787] [Note 32]

[0788] The zoom lens according to any one of Supplementary Notes 1 to 31, wherein:

[0789] The distance on the optical axis from the lens surface closest to the image side of the first lens group to the lens surface adjacent to the image side of the lens surface closest to the image side of the first lens group in a state focused on an infinitely distant object at the wide-angle end is d1R.

[0790] When the maximum image height in the state of focusing on an object at infinity at the wide-angle end is set to IHw,

[0791] The condition (17) expressed as follows is satisfied:

[0792] 0.03<d1R / IHw<0.097 (17).

[0793] [Note 33]

[0794] An imaging device comprising the zoom lens according to any one of Supplementary Notes 1 to 32.

Claims

1. A zoom lens comprising: a first lens group disposed closest to the object side and having positive refractive power; an intermediate lens group comprising a plurality of lens groups; and a final lens group disposed closest to the image side. When zooming, all the intervals between adjacent lens groups change. The first lens group includes two negative lenses in order from the object side to the image side. Of the two negative lenses, the negative lens on the object side is a meniscus lens with its convex surface facing the object side. Let fw be the focal length of the entire system when focusing on an object at infinity at the wide-angle end. And when the focal length of the first lens group is set to f1, The following condition (1) is satisfied: 0.1 <fw / f1<0.8 (1)。 2. The zoom lens according to claim 1, wherein The distance on the optical axis from the lens surface of the first lens group closest to the object to the object-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1f. The distance on the optical axis from the lens surface closest to the object of the first lens group to the object-side principal point position of the entire system when the lens is focused on an infinitely distant object at the telephoto end is Hft. Regarding the signs of H1f and Hft, with the lens surface closest to the object side of the first lens group as a reference, the object side is negative and the image side is positive, The condition (2) expressed as follows is satisfied: 0.1<H1f / Hft<0.95 (2). 3 . The zoom lens according to claim 1 , further comprising an L1n lens having negative refractive power and adjacent to the image side of the L1p lens, which is the most object-side positive lens among the positive lenses included in the first lens group.

4. The zoom lens according to claim 1 or 2, wherein: The distance on the optical axis from the lens surface of the first lens group closest to the object to the object-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1f. The distance on the optical axis from the lens surface closest to the object of the first lens group to the object-side principal point position of the entire system when the lens is focused on an infinitely distant object at the telephoto end is Hft. Regarding the signs of H1f and Hft, with the lens surface closest to the object side of the first lens group as a reference, the object side is negative and the image side is positive, Satisfy the conditional formula (2-1) expressed as follows: 0.28 <H1f / Hft<0.7(2-1)。 5. The zoom lens according to claim 1 or 2, wherein: When the distance on the optical axis between the object-side principal point position of the first lens group and the image-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is HD1, The condition (3) expressed as follows is satisfied: 1.4<HD1 / f1<2.16 (3).

6. The zoom lens according to claim 1 or 2, wherein: The first lens group includes, from the object side to the image side, sub-group 1a, sub-group 1b, and sub-group 1c. During focusing, the interval between the subgroup 1a and the subgroup 1b changes, and the interval between the subgroup 1b and the subgroup 1c changes.

7. The zoom lens according to claim 6, wherein: When the focal length of the 1b subgroup is set to f1b, The condition (4) expressed as follows is satisfied: 0.3 <f1 / f1b<1 (4)。 8. The zoom lens according to claim 6, wherein: The lens closest to the image side of the sub-group 1a is a negative lens. 9 . The zoom lens according to claim 8 , further comprising a positive lens disposed adjacent to the object side of the negative lens closest to the image side in the sub-group 1a.

10. The zoom lens according to claim 6, wherein The subgroup 1a has negative optical power.

11. The zoom lens according to claim 6, wherein: The subgroup 1b has positive optical power.

12. The zoom lens according to claim 6, wherein: The 1c-th subgroup has positive optical power.

13. The zoom lens according to claim 6, wherein: When focusing from an infinitely distant object to a nearest object, the subgroup 1a and the subgroup 1c are fixed relative to the image plane, and the subgroup 1b moves toward the image side.

14. The zoom lens according to claim 1 or 2, wherein: During zooming, the first lens group is fixed relative to the image plane.

15. The zoom lens according to claim 1 or 2, wherein: When changing magnification, the final lens group is fixed relative to the image plane.

16. The zoom lens according to claim 1 or 2, wherein: The first lens group includes six or more lenses. 17 . The zoom lens according to claim 1 , further comprising an aperture stop, wherein the aperture stop is fixed relative to the image plane during zooming.

18. The zoom lens according to claim 1 or 2, wherein: The distance on the optical axis from the lens surface closest to the image side of the first lens group to the image side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1r. Regarding the sign of H1r, with the lens surface closest to the image side of the first lens group as a reference, the object side is negative and the image side is positive. The condition (5) expressed as follows is satisfied: 0.7 <H1r / f1<1.5 (5)。 19. The zoom lens according to claim 1 or 2, wherein: The distance on the optical axis from the lens surface of the first lens group closest to the object to the object-side principal point position of the first lens group in a state in which the lens is focused on an object at infinity is denoted as H1f. Regarding the sign of H1f, with the lens surface closest to the object side of the first lens group as a reference, the object side is negative and the image side is positive, The condition (6) expressed as follows is satisfied: 0.7 <H1f / f1<2 (6)。 20. The zoom lens according to claim 3, wherein When the refractive index of the L1p lens with respect to the d-line is N1p, The condition (7) expressed as follows is satisfied: 1.7 <N1p<2.1 (7)。 21. The zoom lens according to claim 3, wherein: When the Abbe number based on the d-line of the L1p lens is v1p, The condition (8) expressed as follows is satisfied: 15<v1p<30 (8).

22. The zoom lens according to claim 3, wherein: When the refractive index of the L1n lens with respect to the d-line is N1n, The condition (9) expressed as follows is satisfied: 1.43<N1n<1.85 (9).

23. The zoom lens according to claim 3, wherein: When the Abbe number based on the d line of the L1n lens is v1n, The condition (10) expressed as follows is satisfied: 30 <v1n<60 (10)。 24. The zoom lens according to claim 3, wherein: When the average value of the Abbe numbers based on the d-line of all negative lenses on the object side of the L1p lens is defined as v1nave, The condition (11) expressed as follows is satisfied: 35<v1nave<60 (11).

25. The zoom lens according to claim 3, wherein: When the average value of the partial dispersion ratios between the g-line and the F-line of all the negative lenses on the object side of the L1p lens is θ1nave, The condition (12) expressed as follows is satisfied: 0.5<θ1nave<0.6 (12).

26. The zoom lens according to claim 1 or 2, 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 condition (13) expressed as follows is satisfied: 2 <Denw / fw<3.5 (13)。 27. The zoom lens according to claim 6, wherein: When the focal length of the 1a subgroup is set to f1a, The condition (14) expressed as follows is satisfied: -2 <f1 / f1a<0 (14)。 28. The zoom lens according to claim 6, wherein: When the focal length of the 1cth subgroup is set to f1c, The condition (15) expressed as follows is satisfied: 0.3 <f1 / f1c<0.8 (15)。 29. The zoom lens according to claim 1 or 2, wherein: When the paraxial curvature radius of the image-side surface of the lens closest to the object side of the first lens group is set to R2, When the paraxial curvature radius of the object-side surface of the second lens from the object side of the first lens group is R3, The condition (16) expressed as follows is satisfied: -3<(R2-R3) / (R2+R3)<0 (16).

30. The zoom lens according to claim 1 or 2, wherein: In a state where the lens is focused on an object at infinity at the wide-angle end, the longest air gap among the air gaps on the optical axis included in the final lens group is defined as the longest air gap. An EX group is arranged in an insertable and removable manner, and the EX group is inserted into the optical path of the longest air gap to change the focal length of the zoom lens while keeping the imaging position constant.

31. The zoom lens according to claim 30, wherein: By inserting or removing the EX group, the maximum image height changes.

32. The zoom lens according to claim 1 or 2, wherein: The distance on the optical axis from the lens surface closest to the image side of the first lens group to the lens surface adjacent to the image side of the lens surface closest to the image side of the first lens group in a state focused on an infinitely distant object at the wide-angle end is d1R. When the maximum image height in the state of focusing on an object at infinity at the wide-angle end is set to IHw, The condition (17) expressed as follows is satisfied: 0.03 <d1R / IHw<0.097 (17)。 33. An imaging device comprising the zoom lens according to any one of claims 1 to 32.

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