Zoom lens and camera device

Abstract

The present invention provides a zoom lens that achieves a wide viewing angle, miniaturization, and high performance, and a camera device having the zoom lens. The zoom lens of the present invention comprises, in order from the object side, a negative first lens group (G1), a positive second lens group (G2), and a subsequent lens group (GR). When focusing, a focus lens group (Gf) that is closer to the image side than the first lens group (G1) moves. The first lens group (G1) is composed of the first a lens group (G1a) and the first b lens group (G1b) in order from the object side. When the average refractive index of the negative lens of the first a lens group (G1a) is set to Nd1ave, the focal length of the focus lens group (Gf) is set to ff, and the focal length of the first lens group (G1) is set to f1, the following conditions are satisfied: (1): 1.73<Nd1ave<1.95, (2): 1<|ff / f1|<3.

Description

[0001] This application is a divisional application of the invention application with application date of March 19, 2019 and application number 201910211741.7, and the invention name of the invention application is zoom lens and camera device. Technical Field

[0002] The invention relates to a zoom lens and a camera device. Background Art

[0003] Wide-angle zoom lenses have been used as imaging lenses for digital cameras and other devices. Wide-angle zoom lens structures are known that include a first lens group with negative refractive power, a second lens group with positive refractive power, and subsequent lens groups arranged in this order from the object side toward the image side. For example, Patent Documents 1, 2, 3, and 4 describe lens systems with the same or similar structures as those described above as wide-angle lens systems.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-090748

[0005] Patent Document 2: Japanese Patent Application Laid-Open No. 2013-015621

[0006] Patent Document 3: Japanese Patent Application Laid-Open No. 2015-203735

[0007] Patent Document 4: Japanese Patent Application Laid-Open No. 2015-138122

[0008] In recent years, there has been an increasing demand for smaller imaging devices that offer a wide viewing angle. To meet this demand, there are demands for miniaturization of the first lens group closest to the object, which facilitates enlargement of the lens diameter, miniaturization of the lens group that moves during focusing (hereinafter referred to as the focus lens group), and miniaturization of the entire lens system, including reducing the amount of movement of the focus lens group.

[0009] However, in the zoom lens described in Patent Document 1, a low-dispersion material is used in the negative lens element on the object side of the first lens group. Since the refractive index of the low-dispersion material is low, the average refractive index of the first lens group is low, making it difficult to achieve a wide angle of view. For example, if a wide angle of view is to be achieved while maintaining the conditions described in Patent Document 1 for using the low-dispersion material, the absolute values ​​of the radii of curvature of the three negative lens elements on the object side of the first lens group will decrease, resulting in increased aberrations in the first lens group. Alternatively, the diameters of the lenses constituting the first lens group will increase.

[0010] In the zoom lens described in Patent Document 2, a focus lens group is arranged on the image side within the first lens group. The lens arranged in the first lens group has a large outer diameter and a large weight, which causes the driving actuator to become larger, and thus leads to an increase in the size of the entire camera device. In addition, in order to ensure the stroke for focusing, that is, the amount of movement of the focus lens group, it is necessary to widen the gap between the focus lens group and the lens group arranged on the object side within the first lens group. However, if this gap is to be widened, there will be a problem that the outer diameter of the lens closest to the object side and the outer diameter of the lens arranged on the object side within the first lens group become larger. In addition, in the zoom lens described in Patent Document 2, there are problems such as the refractive power of the focus lens group is weak and the amount of movement of the focus lens group is large.

[0011] The zoom lens described in Patent Document 3 employs a structure in which a focus lens group is arranged on the image side within a lens group that is positioned closest to the object and is fixed during zooming. However, the zoom lens described in Patent Document 3 also suffers from the problem that the refractive power of the focus lens group is weak and the amount of movement of the focus lens group is large.

[0012] In the zoom lens described in Patent Document 4, the second lens group is a focus lens group. However, there are problems in that the refractive power of the focus lens group is weak and the amount of movement of the focus lens group is large. Summary of the Invention

[0013] In view of the above circumstances, an object of the present invention is to provide a zoom lens that can achieve a wide viewing angle, is compact, and has high optical performance, and an imaging device including the zoom lens.

[0014] In order to solve the above-mentioned problems, the zoom lens of the present invention is composed of, from the object side to the image side, a first lens group with negative refractive power, a second lens group with positive refractive power, and subsequent lens groups. When changing magnification, as at least the first lens group and the second lens group move, the mutual distance between the first lens group, the second lens group, and the subsequent lens groups changes. When focusing from an object at infinity to an object at close distance, the focus lens group arranged on the image side closer than the first lens group moves. The first lens group is composed of, from the object side to the image side, a 1a lens group and a 1b lens group. The 1a lens group is composed of three negative lenses, and the 1b lens group has at least one negative lens and at least one positive lens. The distance between the 1a lens group and the 1b lens group does not change during changing magnification and focusing. When the average value of the refractive index of the three negative lenses of the 1a lens group with respect to the d-line is set to Ndlave, the focal length of the focus lens group is set to ff, and the focal length of the first lens group is set to f1, the following conditional expressions (1) and (2) are satisfied.

[0015] 1.73<Nd1ave<1.95……(1)

[0016] 1<|ff / f1|<3……(2)

[0017] In the zoom lens of the present invention, it is preferable that the focus lens group is composed of three or more lenses.

[0018] In the zoom lens of the present invention, the lateral magnification of the focus lens group in the state of focusing on an object at infinity at the wide-angle end is set to βfw, and the composite lateral magnification of all lenses closer to the image side than the focus lens group in the state of focusing on an object at infinity at the wide-angle end is set to βrw. When βrw is set to 1 when no lens is configured closer to the image side than the focus lens group, it is preferable to satisfy the following conditional expression (3).

[0019] 0.6<|(1-βfw 2 )×βrw 2 |<2.3……(3)

[0020] In the zoom lens of the present invention, it is preferable that the subsequent lens group includes a lens group having negative refractive power that moves while changing the interval with the adjacent lens group during zooming.

[0021] In the zoom lens of the present invention, the focus lens group is preferably a part of the subsequent lens group or the entire subsequent lens group. Furthermore, the focus lens group preferably has negative refractive power.

[0022] In the zoom lens of the present invention, when the minimum value of the refractive index of the three negative lenses in the 1a-th lens group with respect to the d-line is Nd1amin, it is preferable that the following conditional expression (4) is satisfied.

[0023] 1.52<Nd1amin<1.89……(4)

[0024] In the zoom lens of the present invention, when the d-line-based Abbe number of at least one lens included in the focus lens group is denoted by v df, it is preferable that the following conditional expression (5) is satisfied.

[0025] 60<v df……(5)

[0026] In the zoom lens of the present invention, when the d-line-based Abbe number of at least one negative lens included in the 1b-th lens group is denoted by v d1bn , the following conditional expression (6) is preferably satisfied.

[0027] 60<v d1bn……(6)

[0028] In the zoom lens of the present invention, when the refractive index of the lens arranged most on the object side with respect to the d-line is Nd1, it is preferable that the following conditional expression (7) is satisfied.

[0029] 1.7<Nd1<2.1……(7)

[0030] In the zoom lens of the present invention, when the air-converted distance on the optical axis from the lens surface closest to the image side when focusing on an object at infinity at the wide-angle end to the image plane is set as BFw, the focal length of the zoom lens when focusing on an object at infinity at the wide-angle end is set as fw, and the maximum half angle of view when focusing on an object at infinity at the wide-angle end is set as ωw, it is preferable that the following conditional expression (8) is satisfied.

[0031] 0.5<BFw / (fw×tanωw)<1.5……(8)

[0032] In the zoom lens of the present invention, when the maximum half angle of view when focusing on an object at infinity at the wide-angle end is ωw and the open F value at the wide-angle end is FNow, it is preferable that the following conditional expression (9) is satisfied.

[0033] 0.45<tanωw / FNow<1……(9)

[0034] In the zoom lens of the present invention, when the curvature radius of the lens surface on the object side of the lens arranged closest to the object side is set to R1 and the curvature radius of the lens surface on the image side of the lens arranged closest to the object side is set to R2, the following conditional expression (10) is satisfied.

[0035] 3.3<(R1+R2) / (R1-R2)<5.5……(10)

[0036] In the zoom lens of the present invention, when the focal length of the first lens group is f1 and the focal length of the second lens group is f2, it is preferable that the following conditional expression (11) is satisfied.

[0037] 0.2<|f1 / f2|<0.65……(11)

[0038] In the zoom lens of the present invention, when the focal length of the 1a-th lens group is f1a and the focal length of the 1b-th lens group is f1b, it is preferable that the following conditional expression (12) is satisfied.

[0039] 0.02<|f1a / f1b|<0.15……(12)

[0040] In the zoom lens of the present invention, the subsequent lens group preferably includes, on the most image side, a lens group having a positive refractive power, the interval between which changes with the adjacent lens group during zooming.

[0041] In the zoom lens of the present invention, it is preferable that the lens group having positive refractive power closest to the image side of the subsequent lens group is fixed relative to the image plane during zooming and focusing.

[0042] In the zoom lens of the present invention, it is preferred that the subsequent lens groups are composed of the following lens groups in sequence from the object side toward the image side: an intermediate lens group, which is composed of one or two lens groups and has positive refractive power as a whole; a focusing lens group, which has negative refractive power; and a lens group with positive refractive power, and the one or two lens groups in the intermediate lens group, the focusing lens group and the lens group with positive refractive power arranged on the image side closest to each other have their intervals with the adjacent lens groups changing when the magnification is changed.

[0043] In the zoom lens of the present invention, it is preferable that the 1b-th lens group is composed of two lenses, and the two lenses are composed of a negative lens and a positive lens in this order from the object side toward the image side.

[0044] The imaging device of the present invention includes the zoom lens of the present invention.

[0045] In addition, the phrases "composed of" and "composed of" in this specification indicate that in addition to the listed constituent elements, the lens may also include lenses that do not substantially have refractive power, optical elements other than lenses such as apertures, filters, and cover glasses, as well as mechanical parts such as lens flanges, lens barrels, imaging elements, and hand-shake correction mechanisms.

[0046] In addition, in this specification, "a group having positive refractive power" means that the group as a whole has positive refractive power. Similarly, "a group having negative refractive power" means that the group as a whole has negative refractive power. "Lens having positive refractive power", "positive lens" and "positive lens" have the same meaning. "Lens having negative refractive power", "negative lens" and "negative lens" have the same meaning. "Lens group" is not limited to a structure consisting of multiple lenses, and can be set to a structure consisting of only one lens. Regarding the refractive power sign, surface shape of the lens surface, and curvature radius related to lenses including aspheric surfaces, unless otherwise specified, they are considered in the paraxial region. Regarding the sign of the curvature radius, the sign of the curvature radius of the surface with a convex surface facing the object side is set to positive, and the sign of the curvature radius of the surface with a convex surface facing the image side is set to negative. The "focal length" used in the conditional expression is the paraxial focal length. The value of the conditional expression is based on the value of the d-line. The "d-line", "C-line", "F-line" and "g-line" described in this specification are bright lines. The wavelength of the d-line is 587.56 nm (nanometers), the wavelength of the C-line is 656.27 nm (nanometers), the wavelength of the F-line is 486.13 nm (nanometers), and the wavelength of the g-line is 435.84 nm (nanometers).

[0047] Effects of the Invention

[0048] According to the present invention, it is possible to provide a zoom lens that can achieve a wide viewing angle, is compact, and has high optical performance, and an imaging device including the zoom lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a cross-sectional view and a diagram showing a movement trajectory of a zoom lens according to one embodiment of the present invention, showing a lens structure and an optical path.

[0050] Figure 2 These are cross-sectional views and diagrams showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 1 of the present invention, and movement loci.

[0051] Figure 3 sectional views and movement loci of the lens at the wide-angle end and the telephoto end of the zoom lens according to Example 2 of the present invention.

[0052] Figure 4 sectional views and movement loci of the lens at the wide-angle end and the telephoto end of the zoom lens according to Example 3 of the present invention.

[0053] Figure 5 sectional views and diagrams showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 4 of the present invention, and movement loci.

[0054] Figure 6 sectional views and diagrams showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 5 of the present invention, and movement loci.

[0055] Figure 7 sectional views and movement loci of the lens at the wide-angle end and the telephoto end of the zoom lens according to Example 6 of the present invention.

[0056] Figure 8 sectional views and diagrams showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 7 of the present invention, and movement loci.

[0057] Figure 9 sectional views and diagrams showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 8 of the present invention, and movement loci.

[0058] Figure 10 sectional views and diagrams showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 9 of the present invention, and movement loci.

[0059] Figure 11 1 and 2 are cross-sectional views showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 10 of the present invention, and diagrams showing movement loci.

[0060] Figure 12 1 and 2 are cross-sectional views showing the lens configuration at the wide-angle end and the telephoto end of the zoom lens according to Example 11 of the present invention, and diagrams showing movement loci.

[0061] Figure 13 Graphs showing various aberrations of the zoom lens according to Example 1 of the present invention.

[0062] Figure 14 Graphs showing various aberrations of the zoom lens according to Example 2 of the present invention.

[0063] Figure 15 Graphs showing various aberrations of the zoom lens according to Example 3 of the present invention.

[0064] Figure 16 Graphs showing various aberrations of the zoom lens according to Example 4 of the present invention.

[0065] Figure 17 Graphs showing various aberrations of the zoom lens according to Example 5 of the present invention.

[0066] Figure 18 Graphs showing various aberrations of the zoom lens according to Example 6 of the present invention.

[0067] Figure 19 Graphs showing various aberrations of the zoom lens according to Example 7 of the present invention.

[0068] Figure 20 Graphs showing various aberrations of the zoom lens according to Example 8 of the present invention.

[0069] Figure 21 Graphs showing various aberrations of the zoom lens according to Example 9 of the present invention.

[0070] Figure 22 Graphs showing various aberrations of the zoom lens according to Example 10 of the present invention.

[0071] Figure 23 Graphs showing various aberrations of the zoom lens according to Example 11 of the present invention.

[0072] Figure 24 It is a perspective view of the front side of the imaging device according to one embodiment of the present invention.

[0073] Figure 25 It is a perspective view of the back side of the imaging device according to one embodiment of the present invention.

[0074] Explanation of symbols

[0075] 1-Zoom lens, 2-On-axis light beam, 3-Light beam at maximum angle of view, 20-Interchangeable lens, 30-Camera, 31-Camera body, 32-Shutter button, 33-Power button, 34, 35-Operation unit, 36-Display unit, 37-Mount, G1-1st lens group, G1a-1ath lens group, G1b-1bth lens group, G2-2nd lens group, G3-3rd lens group, G4-4th lens group, G5-5th lens group, G6-6th lens group, Gf-Focus lens group, Gm-Middle lens group, GR-Subsequent lens group, L11~L15, L21~L35, L41~L44, L51~L54, L61-Lens, PP-Optical component, Sim-Image plane, St-Aperture diaphragm, Z-Optical axis. DETAILED DESCRIPTION

[0076] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 2 shows a cross-sectional view of a zoom lens at the wide-angle end and an optical path according to an embodiment of the present invention. Figure 1 The example shown corresponds to the zoom lens of Example 1 described later. Figure 1 In the figure, the left side of the paper is the object side, and the right side of the paper is the image side, showing the state of focusing on an object at infinity. For the optical path, the on-axis beam 2 and the beam 3 with the maximum viewing angle are shown.

[0077] In addition, Figure 1 , illustrates an example of a zoom lens being used in an imaging device, with an optical component PP having parallel incident and exit surfaces disposed between the zoom lens and the image plane Sim. Optical component PP is conceived as various filters and / or cover glass. Examples of these filters include low-pass filters, infrared cutoff filters, and filters that cut off specific wavelength regions. Optical component PP is a component without refractive power, and a configuration in which optical component PP is omitted is also possible.

[0078] The zoom lens of this embodiment is composed, in order from the object side to the image side along the optical axis Z, of a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, and a subsequent lens group GR. When zooming from the wide-angle end to the telephoto end, as at least the first lens group G1 and the second lens group G2 move, the spacing between the first lens group G1, the second lens group G2, and the subsequent lens group GR in the optical axis direction changes.

[0079] In addition, as an example, Figure 1 The subsequent lens group GR consists of three lens groups: the third lens group G3, the fourth lens group G4, and the fifth lens group G5, in order from the object side to the image side. The spacing between the third lens group G3, the fourth lens group G4, and the fifth lens group G5 along the optical axis changes during zooming. Figure 1In the example of FIG, the following structure is adopted during zooming: the first lens group G1, the second lens group G2, the third lens group G3 and the fourth lens group G4 move, and the fifth lens group G5 is fixed relative to the image plane Sim. Figure 1 In the figure, below each lens group that moves when changing magnification, arrows are used to show schematic movement trajectories of each lens group when changing magnification from the wide-angle end to the telephoto end, and a ground mark is shown below the 5th lens group G5.

[0080] And, as an example, in Figure 1 2 shows a structure in which the aperture stop St is arranged on the object side of the second lens group G2. This arrangement of the aperture stop St is advantageous in achieving both a wide angle of view and a small diameter of the lens system.

[0081] When the zoom lens of this embodiment focuses from an object at infinity to an object at a close distance, the focus lens group Gf arranged on the image side of the first lens group G1 moves. Figure 1 In the example shown, only the focus lens group Gf moves during focusing. By focusing with a lens group closer to the image side than the first lens group G1, it becomes easy to construct the focus lens group Gf in a compact and lightweight manner, thereby facilitating faster autofocusing.

[0082] Considering the following circumstances, it is preferred that the focus lens group Gf is a part of the subsequent lens group GR or the entire subsequent lens group GR. As mentioned above, in order to construct the focus lens group Gf in a small and lightweight manner so as to enable high-speed autofocusing, it is preferred that the focus lens group Gf is arranged closer to the image side than the first lens group G1. Regarding the positional relationship between the focus lens group Gf and the second lens group G2, it is also possible to consider constructing the focus lens group Gf as a part of the second lens group G2 or the entire second lens group G2, but in this case, the change in the viewing angle and the change in the distortion aberration accompanying the movement of the focus lens group Gf will become larger and is not preferred. This is because if the change in the viewing angle and the change in the distortion aberration accompanying the movement of the focus lens group Gf is large, when performing focusing and shaking actions, it will cause the photographer to feel annoyed by these changes. Considering the above circumstances, it is preferred to configure the focus lens group Gf in the subsequent lens group GR.

[0083] As an example, Figure 1 In the zoom lens shown, the fourth lens group G4 as a whole constitutes the focus lens group Gf. Figure 1 The arrow below the fourth lens group G4 that points toward the image side indicates that the fourth lens group G4 moves toward the image side when focusing from an object at infinity to an object at a close distance.

[0084] It is preferred that the focusing lens group Gf has negative refractive power. As described above, in order to miniaturize the focusing lens group Gf, it is preferred that the focusing lens group Gf is arranged closer to the image side than the first lens group G1, that is, between the surface of the second lens group G2 closest to the object side and the image side surface of the lens group closest to the image side. This is because the refractive power of the composite optical system from the second lens group G2 to the lens group closest to the image side is positive, so compared to setting the lens group with positive refractive power obtained by dividing the refractive power of the composite optical system as the focusing lens group Gf, setting the lens group with negative refractive power of the opposite sign as the focusing lens group Gf can enhance the refractive power of the focusing lens group Gf. By making the focusing lens group Gf have a strong refractive power, the movement of the focusing lens group Gf can be reduced, thereby achieving miniaturization of the entire lens system.

[0085] It is preferred that the focusing lens group Gf is composed of three or more lenses. By composing the focusing lens group Gf with three or more lenses, the aberration variation during focusing can be reduced. For example, the focusing lens group Gf can be composed of two positive lenses and two negative lenses. In this case, the focusing lens group Gf can be composed of a positive lens, a negative lens, a positive lens, and a negative lens in sequence from the object side toward the image side. In this case, the three lenses on the image side can be bonded to each other. In more detail, the focusing lens group Gf can be composed of a positive meniscus lens with its concave surface facing the object side, a negative lens with its concave surface facing the image side, a positive lens, and a negative lens in sequence from the object side toward the image side. Alternatively, the focusing lens group Gf can be composed of two positive lenses and one negative lens. In this case, the focusing lens group Gf can be composed of a positive lens, a negative lens, and a positive lens in sequence from the object side toward the image side. In this case, the two lenses on the image side can be bonded to each other.

[0086] The first lens group G1 is composed of lens group 1a G1a and lens group 1b G1b, in order from the object side toward the image side. The distance between lens group 1a G1a and lens group 1b G1b along the optical axis remains constant during zooming and focusing. If the distance between these two lens groups within the first lens group G1 were not set to a constant, an actuator for driving at least one lens group and a wide distance for moving at least one lens group would be required. Therefore, by setting the distance between lens group 1a G1a and lens group 1b G1b to remain constant during zooming and focusing, miniaturization is facilitated.

[0087] Lens group 1a G1a consists of three negative lenses. By configuring lens group 1a G1a, located on the object side within lens group 1a G1, solely with negative lenses, it becomes easier to prevent the lens diameter of lens group 1a G1 from increasing even when the angle of view is widened. Furthermore, the use of three negative lenses in lens group 1a G1a effectively corrects off-axis aberrations. For example, lens group 1a G1a can be constructed with three negative meniscus lenses with their convex surfaces facing the object. In this case, it is advantageous to achieve wide angles while correcting off-axis aberrations.

[0088] Lens group 1b G1b comprises at least one negative lens element and at least one positive lens element. In a zoom lens comprising a first lens group G1 with negative refractive power and a second lens group G2 with positive refractive power, as in this embodiment, the height of axial rays passing through the first lens group G1 is low at wide-angle angles and increases toward the telephoto side, thus increasing the variation in chromatic aberration associated with zooming. Therefore, within the first lens group G1, a lens group 1b G1b having an achromatic effect, comprising at least one negative lens element and at least one positive lens element, is positioned on the image side, where the height of axial rays increases. This configuration minimizes the variation in axial chromatic aberration associated with zooming.

[0089] More specifically, it is preferred that lens group 1b G1b be composed of two lenses, each consisting of a negative lens and a positive lens in order from the object side toward the image side. In this case, negative refractive power can be concentrated on the object side within lens group 1b, reducing the diameter of the lens positioned closest to the object side. Furthermore, by configuring lens group 1b G1b to consist of only two lenses, miniaturization and lightweighting can be achieved. As an example, lens group 1b G1b can be constructed to consist of a biconcave lens and a positive lens with its convex surface facing the object side. The negative lens and positive lens included in lens group 1b G1b may or may not be joined.

[0090] When the average refractive index of the three negative lenses of the 1a lens group G1a with respect to the d-line is set to Nd1ave, the zoom lens of this embodiment satisfies the following conditional expression (1). Conditional expression (1) specifies the average refractive index of the three lenses arranged in the 1a lens group G1a. By setting it not to be below the lower limit of conditional expression (1), even when widening the angle is achieved, the absolute value of the radius of curvature of the negative lens arranged in the 1a lens group G1a will not become too small, thereby suppressing the increase of off-axis aberrations. Alternatively, by setting it not to be below the lower limit of conditional expression (1), even when widening the angle is achieved, the enlargement of the lens of the 1a lens group G1a can be suppressed. By setting it not to be above the upper limit of conditional expression (1), the dispersion of the negative lens of the 1a lens group G1a can be suppressed from becoming too large, which is particularly beneficial for correcting the chromatic aberration of magnification on the wide-angle side. Furthermore, if the configuration satisfies the following conditional expression (1-1), better characteristics can be achieved, and if the configuration satisfies the following conditional expression (1-2), even better characteristics can be achieved.

[0091] 1.73<Nd1ave<1.95……(1)

[0092] 1.75<Nd1ave<1.93……(1-1)

[0093] 1.77<Nd1ave<1.91……(1-2)

[0094] Furthermore, when the focal length of the focus lens group Gf is set to ff and the focal length of the first lens group G1 is set to f1, the zoom lens of this embodiment satisfies the following conditional expression (2). Conditional expression (2) specifies the relationship between the focal length of the focus lens group Gf and the focal length of the first lens group G1. By setting it not to be below the lower limit of conditional expression (2), the refractive power of the first lens group G1 will not become too weak, thereby helping to suppress the enlargement of the lens diameter of the first lens group G1 or reduce the amount of movement of the first lens group G1 accompanying the magnification change. Alternatively, by setting it not to be below the lower limit of conditional expression (2), the refractive power of the focus lens group Gf will not become too strong, thereby being able to suppress the increase in image plane curvature or the change in image plane curvature accompanying the movement of the focus lens group Gf. By setting it not to be above the upper limit of conditional expression (2), the refractive power of the first lens group G1 will not become too strong, thereby making it easier to correct distortion aberration and astigmatism. Alternatively, by setting the value not to exceed the upper limit of conditional expression (2), the refractive power of focus lens group Gf will not become too weak, thereby reducing the amount of movement of focus lens group Gf during focusing. In addition, if the structure is set to satisfy the following conditional expression (2-1), better characteristics can be achieved, and if the structure is set to satisfy the following conditional expression (2-2), even better characteristics can be achieved.

[0095] 1<|ff / f1|<3……(2)

[0096] 1.1<|ff / f1|<2.9……(2-1)

[0097] 1.2<|ff / f1|<2.3……(2-2)

[0098] Moreover, it is preferred that the zoom lens of the present embodiment satisfies the following conditional expression. When the lateral magnification of the focus lens group Gf in the state of focusing on an infinitely distant object at the wide-angle end is set to βfw, the composite lateral magnification of all lenses closer to the image side than the focus lens group Gf in the state of focusing on an infinitely distant object at the wide-angle end is set to βrw, and when βrw is set to 1 when no lens is configured closer to the image side than the focus lens group Gf, it is preferred that the following conditional expression (3) is satisfied. Conditional expression (3) specifies the amount of focus movement relative to the amount of movement of the focus lens group Gf. By setting it not to be below the lower limit of conditional expression (3), the amount of movement of the focus lens group Gf during focusing can be reduced, thereby facilitating shortening the total length of the lens system. Alternatively, by setting it not to be below the lower limit of conditional expression (3), the shortest photographic distance can be shortened. By setting it not to be above the upper limit of conditional expression (3), the refractive power of the focus lens group Gf does not become too strong, thereby suppressing various aberrations generated in the focus lens group Gf. Furthermore, if the structure satisfies the following conditional expression (3-1), better characteristics can be achieved, and if the structure satisfies the following conditional expression (3-2), even better characteristics can be achieved.

[0099] 0.6<|(1-βfw 2 )×βrw 2 |<2.3……(3)

[0100] 0.8<|(1-βfw 2 )×βrw 2 |<2.1……(3-1)

[0101] 1.1<|(1-βfw 2 )×βrw 2 |<1.9……(3-2)

[0102] When the minimum value of the refractive index of the three negative lenses of the 1a lens group G1a relative to the d-line is set to Nd1amin, it is preferable to satisfy the following conditional formula (4). Conditional formula (4) specifies the minimum refractive index of the negative lens arranged in the 1a lens group G1a. In order to correct the chromatic aberration of magnification on the wide-angle side, it is also possible to consider using a material with small dispersion in the negative lens arranged in the 1a lens group G1a, but the refractive index of such a material is low. If the lens is composed of a material with a low refractive index, the absolute value of the radius of curvature becomes smaller, which will lead to an increase in off-axis aberrations and / or an increase in the diameter of the lens. This undesirable situation can be avoided by setting it not to be below the lower limit of conditional formula (4). By setting it not to be above the upper limit of conditional formula (4), the dispersion of the negative lens of the 1a lens group G1a will not become too large, so it becomes easy to correct the chromatic aberration of magnification at the wide-angle end. Furthermore, if the configuration satisfies the following conditional expression (4-1), better characteristics can be achieved, and if the configuration satisfies the following conditional expression (4-2), even better characteristics can be achieved.

[0103] 1.52<Nd1amin<1.89……(4)

[0104] 1.56<Nd1amin<1.86……(4-1)

[0105] When the d-line reference dispersion coefficient of at least one lens included in the focusing lens group Gf is set to v df, the following conditional formula (5) is preferably satisfied. That is, the focusing lens group Gf preferably has at least one lens that satisfies the conditional formula (5). The conditional formula (5) specifies the dispersion coefficient of at least one lens arranged in the focusing lens group Gf. By setting it not to be below the lower limit of the conditional formula (5), the change of chromatic aberration during focusing can be suppressed. In addition, the following conditional formula (5-1) is preferably satisfied. By setting it not to be below the lower limit of the conditional formula (5-1), the effect related to the conditional formula (5) can be improved. By setting it not to be above the upper limit of the conditional formula (5-1), the required refractive index can be ensured, so that spherical aberration and astigmatism can be well corrected. In addition, if it is set to a structure that satisfies the following conditional formula (5-2), it can achieve better characteristics.

[0106] 60<v df……(5)

[0107] 64<v df<98……(5-1)

[0108] 68<v df<85……(5-2)

[0109] When the d-line-based chromatic aberration coefficient of at least one negative lens included in lens group 1b G1b is set to v d1bn, the following conditional expression (6) is preferably satisfied. That is, lens group 1b preferably includes at least one negative lens that satisfies conditional expression (6). Conditional expression (6) specifies the chromatic aberration coefficient of at least one negative lens arranged in lens group 1b G1b. By setting it not below the lower limit of conditional expression (6), the variation of axial chromatic aberration during zooming can be suppressed. Alternatively, by setting it not below the lower limit of conditional expression (6), the lateral chromatic aberration on the wide-angle side can be well corrected. Furthermore, the following conditional expression (6-1) is preferably satisfied. By setting it not below the lower limit of conditional expression (6-1), the effect related to conditional expression (6) can be enhanced. By setting it not above the upper limit of conditional expression (6-1), the required refractive index can be ensured, thereby making it possible to well correct various aberrations such as spherical aberration. Furthermore, if the structure satisfies the following conditional expression (6-2), even better characteristics can be achieved.

[0110] 60<v d1bn……(6)

[0111] 66<v d1bn<100……(6-1)

[0112] 68<v d1bn<98……(6-2)

[0113] When the refractive index of the lens disposed closest to the object side relative to the d-line is set to Nd1, the following conditional expression (7) is preferably satisfied. Conditional expression (7) specifies the refractive index of the material used for the lens closest to the object side. By setting it not to be below the lower limit of conditional expression (7), it becomes easy to achieve miniaturization of the lens closest to the object side, and further miniaturization of the first lens group G1 as a whole. By setting it not to be above the upper limit of conditional expression (7), it becomes easy to correct image curvature. Alternatively, by setting it not to be above the upper limit of conditional expression (7), it becomes easy to construct the lens closest to the object side without using a material with large dispersion, thereby making it easy to correct chromatic aberration of magnification well.

[0114] 1.7<Nd1<2.1……(7)

[0115] When the air-converted distance on the optical axis from the lens surface closest to the image side when focusing on an object at infinity at the wide-angle end to the image plane Sim is set as BFw, the focal length of the zoom lens when focusing on an object at infinity at the wide-angle end is set as fw, and the maximum half angle of view when focusing on an object at infinity at the wide-angle end is set as ωw, it is preferable to satisfy the following conditional expression (8). Figure 1 In the example shown, ωw corresponds to the angle between the optical axis Z on the object side of the lens closest to the object and the principal ray at the maximum viewing angle. Figure 1In the figure, the main ray of the maximum viewing angle is shown by a single dotted line in the beam 3 of the maximum viewing angle. Conditional expression (8) specifies the relationship between the air-converted distance from the lens surface closest to the image side at the wide-angle end to the image surface Sim, the so-called back focal length, the focal length at the wide-angle end, and the half viewing angle at the wide-angle end. By setting it not to be below the lower limit of conditional expression (8), it becomes easy to ensure the back focal length required in a lens-interchangeable camera, etc. In addition, by setting it not to be below the lower limit of conditional expression (8), it becomes easy to ensure the refractive power of the first lens group G1, or to reduce the interval between the first lens group G1 and the second lens group G2 at the wide-angle end. Thus, it becomes easy to achieve miniaturization of the first lens group G1. By setting it not to be above the upper limit of conditional expression (8), the back focal length will not become too long, so the range in which lenses can be configured can be widened relative to the total optical length, and it becomes easy to set the number of lenses required to ensure good optical performance. Furthermore, if the back focus is long, the refractive power of the first lens group G1 needs to be increased to ensure a long back focus. However, by setting the lens so that the upper limit of conditional expression (8) is not exceeded, the back focus does not become excessively long, and thus it is unnecessary to increase the refractive power of the first lens group G1. As a result, it is easier to correct astigmatism, especially on the telephoto side. Furthermore, by setting the lens structure to satisfy the following conditional expression (8-1), even better characteristics can be achieved.

[0116] 0.5<BFw / (fw×tanωw)<1.5……(8)

[0117] 0.6<BFw / (fw×tanωw)<1.3……(8-1)

[0118] When the maximum half angle of view when focusing on an object at infinity at the wide-angle end is set to ωw and the open F value at the wide-angle end is set to FNow, it is preferable to satisfy the following conditional formula (9). Conditional formula (9) specifies the relationship between the maximum half angle of view and the open F value at the wide-angle end. By setting it not to be below the lower limit of conditional formula (9), the angle of view at the wide-angle end can be widened, or the open F value can be reduced, so that it can correspond to a wide range of uses, thereby becoming a high-value wide-angle zoom lens. By setting it not to be above the upper limit of conditional formula (9), it becomes easy to suppress the increase in the number of lenses and the enlargement of the lens system while obtaining good optical performance. In addition, if it is set to a structure that satisfies the following conditional formula (9-1), it can achieve better characteristics.

[0119] 0.45<tanωw / FNow<1……(9)

[0120] 0.46<tanωw / FNow<0.8……(9-1)

[0121] When the radius of curvature of the lens surface on the object side of the lens arranged closest to the object side is set to R1, and the radius of curvature of the lens surface on the image side of the lens arranged closest to the object side is set to R2, it is preferable to satisfy the following conditional formula (10). Conditional formula (10) stipulates the relationship between the radius of curvature of the surface on the object side of the lens arranged closest to the object side and the radius of curvature of the surface on the image side, the so-called shape coefficient of the lens. By setting it not to be below the lower limit of conditional formula (10), it becomes easy to correct the astigmatism on the telephoto side in particular. By setting it not to be above the upper limit of conditional formula (10), it becomes easy to correct the spherical aberration on the telephoto side well. In addition, by setting it not to be above the upper limit of conditional formula (10), the refractive power of the lens arranged closest to the object side will not become too weak, so it becomes easy to achieve wide angle. In addition, if it is set to a structure that satisfies the following conditional formula (10-1), it can achieve better characteristics.

[0122] 3.3<(R1+R2) / (R1-R2)<5.5……(10)

[0123] 3.3<(R1+R2) / (R1-R2)<5……(10-1)

[0124] When the focal length of the first lens group G1 is set to f1 and the focal length of the second lens group G2 is set to f2, it is preferable to satisfy the following conditional expression (11). Conditional expression (11) specifies the relationship between the focal lengths of the first lens group G1 and the second lens group G2. By setting it not to be below the lower limit of conditional expression (11), the refractive power of the first lens group G1 will not become too strong, so it becomes easy to correct distortion aberration and astigmatism. Alternatively, by setting it not to be below the lower limit of conditional expression (11), the refractive power of the second lens group G2 will not become too weak, so it becomes easy to correct spherical aberration on the telephoto side in particular. By setting it not to be above the upper limit of conditional expression (11), the refractive power of the first lens group G1 will not become too weak, so it is possible to suppress the enlargement of the diameter of the first lens group G1 or suppress the movement of the first lens group G1 when changing the magnification. Alternatively, by setting the lens to not exceed the upper limit of conditional expression (11), the refractive power of the second lens group G2 will not become too strong, thereby making it easier to correct the field curvature on the wide-angle side. In addition, if the structure is set to satisfy the following conditional expression (11-1), even better characteristics can be achieved.

[0125] 0.2<|f1 / f2|<0.65……(11)

[0126] 0.25<|f1 / f2|<0.63……(11-1)

[0127] When the focal length of the 1a lens group G1a is set to f1a and the focal length of the 1b lens group G1b is set to f1b, it is preferable to satisfy the following conditional formula (12). Conditional formula (12) stipulates the relationship between the focal length of the 1a lens group G1a and the focal length of the 1b lens group G1b. By setting it not to be below the lower limit of conditional formula (12), the refractive power of the 1b lens group G1b will not become too weak, so it becomes easy to correct distortion aberration. By setting it not to be above the upper limit of conditional formula (12), the refractive power of the 1b lens group G1b will not become too strong, so it becomes easy to reduce the diameter of the lens arranged closest to the object side. In addition, if it is set to a structure that satisfies the following conditional formula (12-1), it can achieve better characteristics, and if it is set to a structure that satisfies the following conditional formula (12-2), it can achieve even better characteristics.

[0128] 0.02<|f1a / f1b|<0.15……(12)

[0129] 0.03<|f1a / f1b|<0.12……(12-1)

[0130] 0.04<|f1a / f1b|<0.1……(12-2)

[0131] Next, the subsequent lens group GR will be described. Preferably, the subsequent lens group GR includes a lens group with negative refractive power that shifts during zooming, changing the spacing between the lens group and the adjacent lens group. The second lens group G2 is arranged adjacent to the subsequent lens group GR. By arranging a lens group with a refractive power of opposite sign to that of the second lens group G2 within the subsequent lens group, the zooming effect can be enhanced. Furthermore, by providing lens groups with negative refractive power on the object and image sides of the second lens group G2, off-axis aberrations can be corrected.

[0132] Preferably, the subsequent lens group GR includes a lens group with positive refractive power on the image side, the spacing between the lens group and the adjacent lens group changing during zooming. In a wide-angle zoom lens, the angle of incidence of the principal ray at the maximum angle of view onto the image plane Sim tends to increase, particularly at the wide-angle end. By arranging a lens group with positive refractive power on the image side, it becomes easier to reduce the angle of incidence of the principal ray at the maximum angle of view onto the image plane Sim.

[0133] When the subsequent lens group GR includes the aforementioned positive refractive power lens group on the image side, it is preferred that the positive refractive power lens group on the image side be fixed relative to the image plane Sim during zooming and focusing. By fixing the lens group on the image side, it is possible to reduce the intrusion of debris into the zoom lens.

[0134] Furthermore, the positive refractive power lens group closest to the image side within the subsequent lens group GR is preferably fixed relative to the image plane Sim during zooming and focusing, and is composed of a single lens. Because the diameter of the light beam passing through the lens group closest to the image side decreases, the burden of aberration correction on this lens group is lessened, and therefore, it is preferably constructed with a smaller number of lenses. Combining the lens group closest to the image side with only a single lens contributes to miniaturization.

[0135] Preferably, the subsequent lens group GR is composed of the following lens groups in sequence from the object side to the image side: the intermediate lens group Gm, which is composed of 1 or 2 lens groups and has positive refractive power as a whole; the focusing lens group Gf, which has negative refractive power; and a lens group with positive refractive power. Figure 1 In the example shown, the third lens group G3 corresponds to the intermediate lens group Gm. One or two lens groups within the intermediate lens group Gm, the focus lens group Gf, and the lens group with positive refractive power located closest to the image side are lens groups whose spacing from adjacent lens groups changes during zooming. That is, the zoom lens of this embodiment is preferably composed, in order from the object side to the image side, of a first lens group G1 with negative refractive power, a second lens group G2 with positive refractive power, the intermediate lens group Gm, a focus lens group Gf with negative refractive power, and a lens group with positive refractive power. By configuring the zoom lens to have five to six lens groups whose spacing from each other changes during zooming, the occurrence of decentered coma associated with manufacturing errors is suppressed, thereby reducing the difficulty of manufacturing and enabling good correction of aberrations, especially field curvature, across the entire zoom range.

[0136] in addition, Figure 1 In the example shown in FIG1 , the spacing between the lens groups changes during zooming, and the number of lens groups constituting the subsequent lens group GR is 3. However, in the technology disclosed herein, the number of lens groups constituting the subsequent lens group GR can also be set to another number. Therefore, in consideration of balancing miniaturization and high performance, the number can be set to, for example, 1 or more and 4 or less.

[0137] In addition, Figure 1 , an example is shown in which an optical component PP is arranged between the lens system and the image plane Sim, but a low-pass filter and / or various filters that block light in a specific wavelength region may be arranged between each lens, or a coating having the same function as the various filters may be applied to the lens surface of any lens, instead of arranging these various filters between the lens system and the image display plane Sim.

[0138] The preferred and possible configurations described above can be combined in any manner, and are preferably selectively employed according to the required specifications. This embodiment achieves a zoom lens that achieves both a wide viewing angle and compactness, while also exhibiting high optical performance. Furthermore, the term "wide viewing angle" herein refers to a maximum full viewing angle of greater than 120 degrees at the wide-angle end.

[0139] Next, numerical examples of the zoom lens according to the present invention will be described.

[0140] [Example 1]

[0141] The cross-sectional view and schematic movement trajectory of the zoom lens of Example 1 are shown in FIG. Figure 2 In addition, Figure 2 In the figure, the left side of the paper is the object side, and the right side of the paper is the image side, showing the state of focusing on an object at infinity. Figure 2 In FIG, the wide-angle end state is shown in the upper section marked with “wide-angle end”, and the telephoto end state is shown in the lower section marked with “telephoto end”. Figure 2 In the figure, between the upper and lower sections, arrows are used to show the schematic movement trajectories of the lens groups that move when changing magnification from the wide-angle end to the telephoto end, and ground marks are shown for the lens groups that are fixed relative to the image plane Sim when changing magnification.

[0142] The zoom lens of Example 1 is composed, in order from the object side to the image side, of a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having negative refractive power, and a fifth lens group G5 having positive refractive power. When zooming from the wide-angle position to the telephoto position, the first lens group G1 moves toward the image side, the second lens group G2, the third lens group G3, and the fourth lens group G4 move toward the object side, and the fifth lens group G5 remains fixed relative to the image plane Sim. All intervals between adjacent lens groups change. The first lens group G1 consists of five lenses, L11 to L15, in order from the object side to the image side. The second lens group G2 consists of the aperture stop St and five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 consists of five lenses, L31 to L35, in order from the object side to the image side. The fourth lens group G4 consists of four lenses, L41 to L44, in order from the object side to the image side. The fifth lens group G5 consists of one lens, L51. The focus lens group Gf comprises the entire fourth lens group G4. Figure 2 In, with Figure 1 Similarly, arrows pointing toward the image side are shown below the lens group corresponding to the focus lens group Gf. The above is a schematic configuration of the zoom lens of Example 1.

[0143] Table 1 shows the basic lens data for the zoom lens of Example 1, Table 2 shows the specifications and variable surface spacing, and Table 3 shows the aspheric coefficients. In Table 1, the Sn column shows the surface numbers, with the surface closest to the object side designated as surface 1 and numbered one by one toward the image side. The R column shows the radius of curvature of each surface, and the D column shows the surface spacing on the optical axis between each surface and its image-side adjacent surface. The Nd column shows the refractive index of each component with respect to the d-line, the vd column shows the d-line-based Abbe number of each component, and the θgF column shows the partial dispersion ratio between the g-line and the F-line for each component. The partial dispersion ratio θgF between the g-line and the F-line of a particular lens is defined as θgF = (Ng - NF) / (NF - NC), assuming the refractive indices of the lens with respect to the g-line, F-line, and C-line are Ng, NF, and NC, respectively.

[0144] In Table 1, the sign of the curvature radius of the surface with a convex surface facing the object side is set to positive, and the sign of the curvature radius of the surface with a convex surface facing the image side is set to negative. Table 1 also shows the aperture stop St and the optical component PP. In Table 1, the term (St) is recorded together with the surface number in the surface number column corresponding to the aperture stop St. The value in the bottom column of D in Table 1 is the distance between the surface closest to the image side in the table and the image plane Sim. In Table 1, the symbol DD[] is used for variable surface spacing, and the surface number on the object side of the spacing is marked in [] and recorded in the D column.

[0145] Table 2 shows the zoom ratio Zr, the focal length f of the entire system, the F-number FNo., the maximum full angle of view 2ω, and the variable surface spacing using the d-line as the reference. The (°) in the 2ω column indicates the unit of degree. In Table 2, the values ​​for focusing on an object at infinity at the wide-angle end, focusing on an object at infinity at the telephoto end, focusing on an object 500 mm (millimeter) from the image plane at the wide-angle end, and focusing on an object 500 mm (millimeter) from the image plane at the telephoto end are shown in the columns labeled W-Infinity, T-Infinity, W-500mm, and T-500mm, respectively. The f in the W-Infinity column corresponds to the fw used in the above-mentioned conditional equation.

[0146] In Table 1, the aspheric surface number is marked with an *, and the curvature radius of the aspheric surface column shows the value of the paraxial curvature radius. In Table 3, the Sn column shows the surface number of the aspheric surface, and the KA and Am (m = 3, 4, 5, ...) columns show the values ​​of the aspheric coefficients of each aspheric surface. The "E ± n" (n: integer) of the aspheric coefficients in Table 3 means "×10 ±n KA and Am are aspherical coefficients in the aspherical formula represented by the following formula.

[0147] Zd=C×h 2 / {1+(1-KA×C 2 ×h 2 ) 1 / 2}+∑Am×h m

[0148] in,

[0149] Zd: depth of aspheric surface (the length of the perpendicular line from a point on the aspheric surface at height h to the plane perpendicular to the optical axis tangent to the vertex of the aspheric surface);

[0150] h: Height (the distance from the optical axis to the lens surface);

[0151] C: the reciprocal of the paraxial curvature radius;

[0152] KA, Am: aspheric coefficients,

[0153] Σ in the aspherical expression represents the sum related to m.

[0154] The data in each table uses degrees as the unit of angle and mm (millimeter) as the unit of length. However, since the optical system can be used even at magnification or reduction, other appropriate units can be used. Furthermore, the values ​​in the following tables are rounded to the specified number of digits.

[0155] [Table 1]

[0156] Example 1

[0157] Sn R D Nd vd θgF 1 41.94034 2.100 1.85150 40.78 0.56958 2 24.28157 6.178 *3 75.00000 2.500 1.69259 53.07 0.54955 *4 18.47265 7.784 *5 36.29274 2.100 1.85108 40.12 0.56852 *6 17.10000 8.354 7 -46.41263 1.120 1.43875 94.66 0.53402 8 26.32000 5.100 1.95375 32.32 0.59015 9 366.77570 DD[9] 10(St) ∞ 1.311 *11 26.26117 4.880 1.69350 53.18 0.54831 *12 -35.28129 0.203 13 -57.42580 0.820 1.75500 52.32 0.54737 14 19.66700 2.800 1.59522 67.73 0.54426 15 137.14630 1.893 16 -277.24752 0.790 1.81600 46.62 0.55682 17 29.77900 2.800 1.64769 33.79 0.59393 18 -67.77760 DD

[18] 19 -155.86052 0.810 1.81600 46.62 0.55682 20 20.41300 4.360 1.59282 68.62 0.54414 21 -35.61991 2.100 22 42.02719 1.010 1.85150 40.78 0.56958 23 18.24500 4.990 1.43875 94.66 0.53402 24 -56.85949 0.150 25 25.78476 5.800 1.43875 94.66 0.53402 26 -25.78476 DD

[26] *27 -64.12560 2.690 1.85343 40.56 0.56684 *28 -21.45850 0.100 29 ∞ 0.890 1.88300 40.76 0.56679 30 12.20900 5.680 1.49700 81.54 0.53748 31 -177.03000 0.810 1.88300 39.22 0.57295 32 27.74373 DD

[32] 33 155.15267 2.500 1.94595 17.98 0.65460 34 -99.58637 8.949 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0158] [Table 2]

[0159] Example 1

[0160] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.238 15.516 8.195 15.327 FNo. 2.88 2.88 2.85 2.87 2ω(°) 125.8 82.4 126.0 82.8 DD[9] 29.531 2.986 29.531 2.986 DD

[18] 3.357 2.809 3.357 2.809 DD

[26] 2.100 6.601 2.222 6.900 DD

[32] 3.447 9.257 3.325 8.958

[0161] [Table 3]

[0162] Example 1

[0163] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8160996E-04 1.8468610E-04 -3.5121597E-05 -5.1194646E-05 A5 -1.1335952E-05 -1.2145091E-05 -1.7847803E-05 -1.8058170E-05 A6 -1.4335425E-06 -1.2166255E-06 2.3507898E-06 3.5437269E-06 A7 1.6657704E-07 7.3739848E-09 2.6791047E-07 1.0407126E-07 A8 3.7176528E-09 1.1634818E-08 -4.7251861E-08 -6.5002915E-08 A9 -1.1789882E-09 1.7527294E-09 -2.3578362E-09 1.5980818E-09 A10 1.6846045E11 -2.3439242E-10 5.0985133E-10 9.6469129E-10 A11 4.9683664E-12 -2.0890135E-11 1.3769111E11 -1.1394206E-10 A12 -1.6509787E-13 2.6854226E-12 -3.4119027E-12 -3.5085860E-12 A13 -1.2889391E-14 1.1950808E-13 -5.0951086E-14 1.5437474E-12 A14 5.7379998E-16 -1.6261627E-14 1.4344945E-14 -4.8263251E-14 A15 2.0021309E-17 -3.8891310E-16 1.0991901E-16 -8.5442321E-15 A16 -1.0471255E-18 5.3876680E-17 -3.6564916E-17 4.8212604E-16 A17 -1.6950892E-20 6.9841033E-19 -1.2242734E-19 2.0638114E-17 A18 1.0001019E-21 -9.2860078E-20 5.1534781E-20 -1.5464338E-18 A19 5.9701858E-24 -5.4301162E-22 5.2084646E-23 -1.7486813E-20 A20 -3.9636710E-25 6.5318111E-23 -3.0822936E-23 1.6996115E-21

[0164] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 3.4130173E-05 6.2420625E-05 -6.0807770E-05 2.9716437E-05 A5 -2.6217914E-05 -2.1062733E-05 3.6227550E-05 7.6242490E-07 A6 9.8676344E-06 8.4905269E-06 -2.5310378E-05 -1.7092045E-06 A7 -4.8898264E-07 -1.1036213E-06 9.4296047E-06 4.5860772E-07 A8 -7.2967595E-07 -2.5485692E-07 -1.6820493E-06 1.4557727E-08 A9 1.9381422E-07 1.1852547E-07 -6.1219487E-10 -2.5304394E-08 A10 1.5648615E-09 -1.3534098E-08 5.3585618E-08 1.6289649E-09 A11 -6.6656712E-09 -1.6863962E-09 -7.2268338E-09 6.6338124E-10 A12 4.6499647E-10 6.5309998E-10 -2.3410749E-10 -6.7515269E-11 A13 1.2073678E-10 -4.1165896E-11 1.2768330E-10 -9.9334783E-12 A14 -1.2738591E-11 -9.2191136E-12 -6.9388519E-12 1.2373518E-12 A15 -1.4421479E-12 1.4785823E-12 -6.7668240E-13 8.6500487E-14 A16 1.7978446E-13 2.0460884E-14 8.4897976E-14 -1.2293866E-14 A17 1.0435769E-14 -1.6419747E-14 -9.8085392E-16 -4.0666189E-16 A18 -1.3885918E-15 6.1368314E-16 -2.5071105E-16 6.4330812E-17 A19 -3.2975909E-17 6.4961582E-17 1.3030111E-17 7.9572817E-19 A20 4.4854674E-18 -4.1335786E-18 -1.9352472E-19 -1.3910445E-19

[0165] exist Figure 13 , which shows various aberration diagrams of the zoom lens of Example 1. Figure 13 In the figure, spherical aberration, astigmatism, distortion, and lateral chromatic aberration are shown from the left. Figure 13, the first section labeled “Wide-angle end, object at infinity” shows the aberration diagrams when focusing on an object at infinity at the wide-angle end, the second section labeled “Telephoto end, object at infinity” shows the aberration diagrams when focusing on an object at infinity at the telephoto end, the third section labeled “Wide-angle end, close-range object (500mm from the image plane)” shows the aberration diagrams when focusing on an object at a distance of 500mm (millimeter) from the image plane Sim at the wide-angle end, and the fourth section labeled “Telephoto end, close-range object (500mm from the image plane)” shows the aberration diagrams when focusing on an object at a distance of 500mm (millimeter) from the image plane Sim at the telephoto end.

[0166] exist Figure 13 In the spherical aberration diagrams, aberrations along the d-line, C-line, F-line, and g-line are represented by solid lines, long dashed lines, short dashed lines, and two-dot chain lines, respectively. In the astigmatism diagrams, aberrations along the d-line in the sagittal direction are represented by solid lines, and aberrations along the d-line in the meridional direction are represented by short dashed lines. In the distortion diagrams, aberrations along the d-line are represented by solid lines. In the lateral chromatic aberration diagrams, aberrations along the C-line, F-line, and g-line are represented by long dashed lines, short dashed lines, and two-dot chain lines, respectively. FNo. in the spherical aberration diagrams indicates the F value, and ω in the other aberration diagrams indicates the half angle of view.

[0167] Unless otherwise specified, the symbols, meanings, description methods, and diagrammatic methods of the data related to the above-mentioned embodiment 1 are the same in the following embodiments, and therefore, repeated descriptions are omitted below.

[0168] [Example 2]

[0169] The cross-sectional view and schematic movement trajectory of the zoom lens of Example 2 are shown in FIG. Figure 3 The zoom lens of Example 2 is composed, in order from the object side to the image side, of a first lens group G1 with negative refractive power, a second lens group G2 with positive refractive power, a third lens group G3 with negative refractive power, and a fourth lens group G4 with positive refractive power. When zooming from the wide-angle end to the telephoto end, the first lens group G1 moves toward the image side, the second lens group G2 and the third lens group G3 move toward the object side, and the fourth lens group G4 remains fixed relative to the image plane Sim, with all intervals between adjacent lens groups changing. The first lens group G1 is composed of five lenses, L11 to L15, in order from the object side to the image side. The second lens group G2 is composed of ten lenses, L21 to L30, in order from the object side to the image side. The third lens group G3 is composed of four lenses, L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of a single lens, L41. The focus lens group Gf is the entire third lens group G3.

[0170] The basic lens data of the zoom lens of Example 2 is shown in Table 4, the specifications and variable surface spacing are shown in Table 5, the aspheric coefficients are shown in Table 6, and the various aberration diagrams are shown in Table 8. Figure 14 middle.

[0171] [Table 4]

[0172] Example 2

[0173] Sn R D Nd vd θgF 1 41.57886 2.100 1.85150 40.78 0.56958 2 24.25407 6.125 *3 75.00000 2.504 1.69259 53.07 0.54955 *4 18.47265 7.966 *5 35.69926 2.100 1.85108 40.12 0.56852 *6 17.26489 8.101 7 -46.17859 1.146 1.43875 94.66 0.53402 8 26.32898 5.100 1.95375 32.32 0.59015 9 262.11995 DD[9] 10(St) ∞ 1.300 *11 26.80662 4.452 1.69350 53.18 0.54831 *12 -35.63650 0.566 13 -61.30614 0.820 1.75500 52.32 0.54737 14 20.38264 2.417 1.59522 67.73 0.54426 15 178.44871 1.659 16 -317.69015 0.810 1.81600 46.62 0.55682 17 19.46256 3.500 1.64769 33.79 0.59393 18 -81.81627 3.300 19 -277.52941 0.810 1.83481 42.72 0.56486 20 22.47336 4.482 1.59282 68.62 0.54414 21 -34.64629 2.116 22 42.23848 0.880 1.85150 40.78 0.56958 23 17.93578 4.893 1.43875 94.66 0.53402 24 -57.98556 0.150 25 25.48677 5.959 1.43875 94.66 0.53402 26 -25.37606 DD

[26] *27 -60.59195 2.288 1.85135 40.10 0.56954 *28 -22.78953 0.150 29 170.69147 0.890 1.88300 40.76 0.56679 30 12.07645 5.852 1.49700 81.54 0.53748 31 -141.73694 0.850 1.88300 40.76 0.56679 32 24.97038 DD

[32] 33 131.85158 2.500 1.95906 17.47 0.65993 34 -104.15265 8.943 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 0.998

[0174] [Table 5]

[0175] Example 2

[0176] W-Infinity T-Infinitv W-500mm T-500mm Zr 1.000 1.883 - - f 8.238 15.517 8.195 15.323 FNo. 2.88 2.88 2.86 2.88 2ω(°) 125.8 82.2 126.0 82.6 DD[9] 29.463 3.031 29.463 3.031 DD

[26] 2.200 7.022 2.317 7.316 DD

[32] 3.525 8.963 3.408 8.670

[0177] [Table 6]

[0178] Example 2

[0179] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.5156791E-04 1.6374914E-04 -8.8814963E-05 -1.0516987E-04 A5 -9.0712096E-06 -1.7761710E-05 -1.8121361E-05 -1.9226538E-05 A6 -9.2049009E-07 1.2690117E-07 4.3273839E-06 5.7643749E-06 A7 1.3501012E-07 1.6616531E-07 2.7891184E-07 1.8068743E-07 A8 -7.0607683E-10 -2.5650069E-08 -8.3364000E-08 -1.1421078E-07 A9 -9.3380967E-10 3.2446511E-09 -2.6690256E-09 -7.2236724E-10 A10 3.7112077E-11 -3.7601892E-10 9.0189314E-10 1.6310740E-09 A11 3.8730063E-12 1.0528382E11 1.7826049E11 -7.7246524E-11 A12 -2.1801993E-13 2.4804841E-12 -6.1170327E-12 -9.2933398E-12 A13 -1.0001266E-14 -2.2284338E-13 -7.7659318E-14 1.2135241E-12 A14 6.5297267E-16 3.1132163E-15 2.6275845E-14 -1.5859194E-14 A15 1.5600421E-17 4.2397882E-16 1.9733519E-16 -6.8377351E-15 A16 -1.1114900E-18 -3.3465602E-17 -6.8550768E-17 3.6853799E-16 A17 -1.3315482E-20 9.4421093E-19 -2.5653251E-19 1.5918878E-17 A18 1.0237693E-21 3.1045963E-20 9.8373488E-20 -1.3183203E-18 A19 4.7249477E-24 -2.3173255E-21 1.2756392E-22 -1.2072567E-20 A20 -3.9773030E-25 2.9331005E-23 -5.9369543E-23 1.4970035E-21

[0180] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 8.5013625E-06 3.7181176E-05 -3.2617943E-05 4.9919455E-05 A5 -1.0632579E-05 -7.1364321E-06 2.4946959E-05 -9.5939703E-06 A6 5.0286367E-06 3.0821562E-06 -2.6744343E-05 -1.8216522E-06 A7 -3.4509972E-07 -7.3929168E-07 1.0475990E-05 7.4076796E-07 A8 -5.4904660E-07 1.0309078E-07 -1.7888595E-06 5.4487057E-09 A9 1.9465468E-07 2.4163434E-08 -1.8253488E-08 -2.9098532E-08 A10 -1.2451284E-08 -1.6651615E-08 5.7224245E-08 1.8045725E-09 A11 -4.7794533E-09 2.0283161E-09 -7.1464254E-09 6.6952922E-10 A12 6.8206386E-10 4.7502649E-10 -2.7951142E-10 -6.6775033E-11 A13 6.1078129E-11 -1.1926956E-10 1.2731880E-10 -9.3706892E-12 A14 -1.1895987E-11 -2.8048301E-12 -6.6195473E-12 1.1702961E-12 A15 -8.3816391E-13 2.4980730E-12 -6.5672099E-13 7.8505572E-14 A16 1.4724643E-13 -8.1177234E-14 8.2505317E-14 -1.1326790E-14 A17 8.7093403E-15 -2.4247830E-14 -1.2144609E-15 -3.6190285E-16 A18 -1.2640897E-15 1.4587642E-15 -2.3266490E-16 5.8242693E-17 A19 -3.5687348E-17 9.1266978E-17 1.3805449E-17 7.0603159E-19 A20 4.7637251E-18 -7.0550367E-18 -2.5097872E-19 -1.2437938E-19

[0181] [Example 3]

[0182] A cross-sectional view and a schematic moving trajectory of the zoom lens of Example 3 are shown in FIG. Figure 4 The zoom lens of Example 3 consists, in order from the object side to the image side, of a first lens group G1 with negative refractive power, a second lens group G2 with positive refractive power, a third lens group G3 with positive refractive power, and a fourth lens group G4 with negative refractive power. When zooming from the wide-angle end to the telephoto end, the first lens group G1 moves toward the image side, while the second lens group G2, the third lens group G3, and the fourth lens group G4 move toward the object side, causing all the intervals between adjacent lens groups to change. The first lens group G1 consists of five lenses, L11 to L15, in order from the object side to the image side. The second lens group G2 consists of five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 consists of five lenses, L31 to L35, in order from the object side to the image side. The fourth lens group G4 consists of four lenses, L41 to L44, in order from the object side to the image side. The focus lens group Gf is the entire fourth lens group G4.

[0183] The basic lens data of the zoom lens of Example 3 is shown in Table 7, the specifications and variable surface spacing are shown in Table 8, the aspheric coefficients are shown in Table 9, and the various aberration diagrams are shown in Table 10. Figure 15 middle.

[0184] [Table 7]

[0185] Example 3

[0186] Sn R D Nd vd θgF 1 37.99918 2.050 1.81352 46.65 0.55465 2 24.14081 5.099 *3 35.59663 2.504 1.99289 23.69 0.62146 *4 19.04644 4.779 *5 42.92988 2.100 1.85108 40.12 0.56852 *6 17.08576 11.798 7 -33.34593 1.120 1.43875 94.66 0.53402 8 30.28942 4.699 1.95375 32.32 0.59015 9 -1553.33353 DD[9] 10(St) ∞ 1.314 *11 30.80661 6.239 1.77794 50.21 0.54894 *12 -42.33093 0.100 13 -71.71406 0.820 1.74073 50.89 0.55099 14 24.54512 2.469 1.49700 81.54 0.53748 15 -399.64726 1.121 16 -470.41576 0.790 1.83259 44.74 0.55815 17 17.16717 3.493 1.68073 31.38 0.59488 18 -84.47041 DD

[18] 19 -158.35527 0.810 1.84607 43.39 0.56082 20 20.45760 4.379 1.59522 67.73 0.54426 21 -34.34684 1.499 22 47.46752 0.880 1.85312 40.61 0.56839 23 18.09806 5.018 1.43875 94.66 0.53402 24 -45.56510 0.100 25 26.85043 5.802 1.43875 94.66 0.53402 26 -22.66757 DD

[26] *27 -55.13921 2.165 1.85135 40.10 0.56954 *28 -23.68550 0.100 29 261.49355 0.890 1.88300 40.76 0.56679 30 12.58792 5.610 1.49700 81.54 0.53748 31 99.37997 0.850 1.88300 40.76 0.56679 32 30.07342 DD

[32] 33 ∞ 2.850 1.51680 64.20 0.53430 34 ∞ 0.999

[0187] [Table 8]

[0188] Example 3

[0189] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 9.265 17.451 9.198 17.117 FNo. 2.89 3.08 2.89 3.07 2ω(°) 121.0 76.8 121.2 77.2 DD[9] 29.998 2.633 29.998 2.633 DD

[18] 3.000 2.605 3.000 2.605 DD

[26] 2.055 5.567 2.195 5.900 DD

[32] 14.970 21.200 14.830 20.868

[0190] [Table 9]

[0191] Example 3

[0192] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8653627E-05 -1.1249714E-05 3.6774134E-05 5.4538416E-05 A5 5.4631576E-07 2.6719413E-06 -3.8926308E-07 2.4279446E-06 A6 -4.3657788E-08 2.7010546E-07 1.1365741E-06 1.0970747E-06 A7 6.4042895E-09 -4.5270907E-08 1.2306813E-07 6.5575677E-08 A8 -1.6980981E-09 1.5229011E-10 -2.9597008E-08 -3.0893979E-08 A9 -1.1629932E-10 4.3579310E-10 -2.0002280E-09 -1.7685576E-09 A10 1.8465428E-11 -5.7910082E-11 3.1290814E-10 3.6785292E-10 A11 7.6190855E-13 -2.4789705E-12 1.7767508E-11 1.3104759E-11 A12 -8.6113503E-14 6.3341097E-13 -2.0558369E-12 -2.8242882E-12 A13 -2.6321701E-15 8.4672178E-15 -9.0257914E-14 3.4455869E-14 A14 2.1838804E-16 -2.8362378E-15 8.8187018E-15 1.2002433E-14 A15 5.0664220E-18 -1.6347103E-17 2.5331244E-16 -1.0257913E-15 A16 -3.1186625E-19 5.2804074E-18 -2.3226910E-17 -3.8788912E-18 A17 -5.1403336E-21 1.4460835E-20 -3.5949537E-19 5.1891087E-18 A18 2.3427439E-22 -1.2301601E-21 3.3201571E-20 -1.5551891E-19 A19 2.1453680E-24 -2.1312597E-24 1.9814768E-22 -8.4230290E-21 A20 -7.1222569E-26 -5.1665384E-24 -1.9382541E-23 3.7039395E-22

[0193] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.2347920E-05 8.1546419E-06 -8.2942493E-05 2.1750019E-05 A5 -8.8716527E-06 1.5376740E-05 4.3001829E-05 -2.1594780E-05 A6 1.5967426E-06 -2.7311680E-06 -2.6894541E-05 6.4033127E-06 A7 2.9623001E-07 -1.2522831E-06 1.0254390E-05 6.2601402E-07 A8 -4.7555152E-08 5.5735626E-07 -1.8342978E-06 -4.5779192E-07 A9 -3.2382724E-08 -6.2854035E-09 -2.1012585E-08 1.0366821E-08 A10 3.4554272E-09 -3.2039148E-08 6.1952713E-08 1.4493944E-08 A11 1.9451415E-09 4.3094838E-09 -7.4166387E-09 -9.0472639E-10 A12 -2.6402955E-10 7.2546476E-10 -3.6147037E-10 -2.5315989E-10 A13 -5.1438216E-11 -1.8677460E-10 1.3335709E-10 2.0689556E-11 A14 8.7946270E-12 -4.1184787E-12 -6.0801859E-12 2.5426916E-12 A15 6.2022429E-13 3.7896816E-12 -6.6634932E-13 -2.3269348E-13 A16 -1.3800331E-13 -1.3499925E-13 7.8955818E-14 -1.4053020E-14 A17 -2.8974041E-15 -3.6109174E-14 -1.6593657E-15 1.3190157E-15 A18 1.0122026E-15 2.3256214E-15 -1.9197625E-16 3.6194488E-17 A19 8.6045771E-19 1.3934838E-16 1.6095999E-17 -3.0132977E-18 A20 -2.7124865E-18 -1.1500892E-17 -4.3047273E-19 -2.3000887E-20

[0194] [Example 4]

[0195] A cross-sectional view and a schematic moving trajectory of the zoom lens of Example 4 are shown in FIG. Figure 5 The zoom lens of Example 4 has the same general structure as that of the zoom lens of Example 1. The basic lens data of the zoom lens of Example 4 is shown in Table 10, the specifications and variable surface spacing are shown in Table 11, the aspheric coefficients are shown in Table 12, and the various aberration diagrams are shown in Table 13. Figure 16 middle.

[0196] [Table 10]

[0197] Example 4

[0198] Sn R D Nd vd θgF 1 42.67431 2.050 1.85150 40.78 0.56958 2 24.17403 7.218 *3 186.38308 2.504 1.69350 53.18 0.54831 *4 18.76100 6.342 *5 27.10033 2.100 1.85108 40.12 0.56852 *6 17.33532 8.887 7 -37.31014 1.161 1.43875 94.66 0.53402 8 26.93188 4.990 1.95375 32.32 0.59015 9 294.00006 DD[9] 10(St) ∞ 1.300 *11 25.98740 5.209 1.69350 53.18 0.54831 *12 -37.87609 0.161 13 -71.74406 0.820 1.73354 50.92 0.55158 14 23.13730 2.423 1.59522 67.73 0.54426 15 272.15551 1.696 16 -438.10014 0.790 1.83954 44.05 0.55951 17 17.80689 3.333 1.64769 33.79 0.59393 18 -95.82496 DD

[18] 19 -160.67334 0.810 1.84584 43.42 0.56078 20 20.65061 4.297 1.59522 67.73 0.54426 21 -36.01869 2.187 22 42.31198 0.880 1.83517 44.22 0.55940 23 17.93272 4.972 1.43875 94.66 0.53402 24 -51.39177 0.181 25 26.04523 5.716 1.43875 94.66 0.53402 26 -24.11193 DD

[26] *27 -62.75366 2.250 1.85135 40.10 0.56954 *28 -23.11976 0.169 29 160.90135 0.899 1.88300 40.76 0.56679 30 12.14725 5.630 1.49700 81.54 0.53748 31 -650.23820 0.850 1.88300 40.76 0.56679 32 24.56773 DD

[32] 33 186.91532 2.241 1.95906 17.47 0.65993 34 -106.63809 8.957 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.001

[0199] [Table 11]

[0200] Example 4

[0201] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.236 15.513 8.192 15.310 FNo. 2.89 2.88 2.83 2.84 2ω(°) 125.8 82.2 126.0 82.6 DD[9] 29.677 3.146 29.677 3.146 DD

[18] 3.300 2.597 3.300 2.597 DD

[26] 2.292 7.117 2.414 7.420 DD

[32] 3.670 9.122 3.548 8.819

[0202] [Table 12]

[0203] Example 4

[0204] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 2.1445858E-04 1.8461883E-04 -9.9451065E-05 -1.0906043E-04 A5 -1.2985368E-05 -1.0276536E-05 -1.8928099E-05 -1.8477134E-05 A6 -1.8231203E-06 -1.7101198E-06 3.6234741E-06 5.1614028E-06 A7 2.0074909E-07 -4.0339021E-08 2.9745042E-07 1.4877817E-07 A8 5.3954269E-09 2.4237593E-08 -7.3434536E-08 -1.1587250E-07 A9 -1.4924077E-09 2.1920222E-09 -2.8111215E-09 3.8059684E-09 A10 2.2509337E11 -4.4007090E-10 8.7573188E-10 1.3795096E-09 A11 6.4380756E-12 -2.2330857E-11 1.8483791E-11 -1.1020155E-10 A12 -2.4169095E-13 4.8045007E-12 -6.5447584E-12 -7.7291138E-12 A13 -1.6909836E-14 1.1579301E-13 -7.9024448E-14 1.2515626E-12 A14 8.7441380E-16 -2.9447988E-14 3.0505737E-14 1.4431896E-16 A15 2.6729528E-17 -3.4578372E-16 1.9651707E-16 -7.4977127E-15 A16 -1.6506986E-18 1.0169269E-16 -8.5263067E-17 2.3649071E-16 A17 -2.3394713E-20 5.7555226E-19 -2.4621714E-19 2.3175488E-17 A18 1.6313682E-21 -1.8580166E-19 1.3009301E-19 -1.1434451E-18 A19 8.7255160E-24 -4.2121116E-22 1.1262502E-22 -2.8962941E-20 A20 -6.6986610E-25 1.4019617E-22 -8.3130498E-23 1.7554360E-21

[0205] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.3870308E-05 3.4408218E-05 -4.9852148E-05 7.0704335E-05 A5 -6.1377377E-06 -9.2976724E-07 3.6346981E-05 -2.8667850E-05 A6 1.6839811E-06 2.1508636E-06 -2.9076299E-05 3.1860450E-06 A7 -1.1998101E-07 -9.7173789E-07 1.0451078E-05 1.1265996E-06 A8 -2.7600084E-08 1.6408518E-07 -1.7136700E-06 -3.2201902E-07 A9 5.7943768E-09 3.2018083E-08 -2.4313123E-08 -9.6344043E-09 A10 -1.9503453E-10 -1.8323815E-08 5.7437014E-08 1.0755792E-08 A11 2.6957849E-10 1.5646972E-09 -7.4019612E-09 -4.2522302E-10 A12 -6.8858616E-11 5.3622644E-10 -2.5485055E-10 -1.8665796E-10 A13 -1.0464501E-11 -1.0243464E-10 1.3381511E-10 1.3641831E-11 A14 3.7334450E-12 -5.6492979E-12 -7.6502144E-12 1.7883771E-12 A15 5.2379685E-14 2.4053660E-12 -6.7509620E-13 -1.7058365E-13 A16 -6.9105098E-14 -4.8592127E-14 9.2941619E-14 -8.8014053E-15 A17 1.2502318E-15 -2.4268411E-14 -1.5973514E-15 1.0183495E-15 A18 5.5457564E-16 1.2608473E-15 -2.6086785E-16 1.5800993E-17 A19 -1.1465453E-17 9.7877074E-17 1.5932396E-17 -2.3995132E-18 A20 -1.6242722E-18 -6.9875921E-18 -2.8644656E-19 1.0828343E-20

[0206] [Example 5]

[0207] The cross-sectional view and schematic movement trajectory of the zoom lens of Example 5 are shown in FIG. Figure 6 The zoom lens of Example 5 has the same general structure as that of the zoom lens of Example 1. The basic lens data of the zoom lens of Example 5 is shown in Table 13, the specifications and variable surface spacing are shown in Table 14, the aspheric coefficients are shown in Table 15, and the various aberration diagrams are shown in Table 16. Figure 17 middle.

[0208] [Table 13]

[0209] Example 5

[0210] Sn R D Nd vd θgF 1 38.95404 2.050 1.59964 61.17 0.54207 2 24.29601 6.461 3 36.16852 2.504 1.95986 29.28 0.60068 4 19.41637 4.501 *5 55.83133 2.100 1.85108 40.12 0.56852 *6 17.07895 11.507 7 -36.94534 1.410 1.43875 94.66 0.53402 8 28.85934 5.496 1.95375 32.32 0.59015 9 7631.46066 DD[9] 10(St) ∞ 1.400 *11 30.78601 7.000 1.78831 49.17 0.55050 *12 -42.25353 0.100 13 -72.06911 0.820 1.73493 43.37 0.56861 14 25.11815 3.000 1.49700 81.54 0.53748 15 -462.01491 1.248 16 -446.27718 0.810 1.83102 44.90 0.55785 17 17.21951 4.402 1.68037 31.40 0.59482 18 -88.23306 DD

[18] 19 -154.73880 0.810 1.84875 43.13 0.56138 20 20.58594 4.370 1.59522 67.73 0.54426 21 -34.11180 1.500 22 48.07929 0.880 1.85369 42.63 0.56241 23 18.18623 4.989 1.43875 94.66 0.53402 24 -46.01267 0.218 25 26.55479 5.798 1.43875 94.66 0.53402 26 -22.98546 DD

[26] *27 -55.09969 2.222 1.85135 40.10 0.56954 *28 -23.71329 0.178 29 325.34179 0.890 1.88300 40.76 0.56679 30 12.39644 5.769 1.49700 81.54 0.53748 31 -124.40641 0.850 1.88300 40.76 0.56679 32 27.25871 DD

[32] 33 258.79796 2.209 1.95906 17.47 0.65993 34 -100.37566 8.821 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0211] [Table 14]

[0212] Example 5

[0213] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 9.267 17.454 9.201 17.171 FNo. 2.89 3.03 2.89 3.02 2ω(°) 121.0 76.8 121.4 77.2 DD[9] 30.402 2.885 30.402 2.885 DD

[18] 3.000 2.366 3.000 2.366 DD

[26] 2.474 6.282 2.603 6.581 DD

[32] 3.408 9.972 3.279 9.673

[0214] [Table 15]

[0215] Example 5

[0216]

[0217]

[0218] [Example 6]

[0219] A cross-sectional view and a schematic moving trajectory of the zoom lens of Example 6 are shown in FIG. Figure 7 The zoom lens of Example 6 has the same general structure as that of the zoom lens of Example 1. The basic lens data of the zoom lens of Example 6 is shown in Table 16, the specifications and variable surface spacing are shown in Table 17, the aspheric coefficients are shown in Table 18, and the various aberration diagrams are shown in Table 19. Figure 18 middle.

[0220] [Table 16]

[0221] Example 6

[0222] Sn R D Nd vd θgF 1 44.04000 2.050 1.85150 40.78 0.56958 2 24.24864 6.981 *3 154.83912 2.504 1.69350 53.18 0.54831 *4 20.19733 6.438 *5 29.09945 2.100 1.85108 40.12 0.56852 *6 17.13338 8.955 7 -37.39517 1.120 1.43875 94.66 0.53402 8 28.39216 5.078 1.95375 32.32 0.59015 9 474.79304 DD[9] 10(St) ∞ 1.300 *11 31.62408 7.000 1.80998 40.95 0.56644 *12 -45.95742 0.409 13 -79.85552 0.820 1.72047 34.71 0.58350 14 24.37152 2.379 1.49700 81.54 0.53748 15 -549.86003 1.049 16 -574.16402 0.790 1.81600 46.62 0.55682 17 16.36729 3.437 1.67270 32.10 0.59891 18 -107.22047 DD

[18] 19 -156.44300 0.810 1.83481 42.72 0.56486 20 21.67065 4.205 1.59522 67.73 0.54426 21 -36.75822 2.097 22 45.85301 0.880 1.83481 42.72 0.56486 23 18.47924 4.871 1.43875 94.66 0.53402 24 -55.78370 0.101 25 28.05382 5.706 1.43875 94.66 0.53402 26 -22.93917 DD

[26] *27 -57.58300 2.623 1.85135 40.10 0.56954 *28 -23.68806 0.100 29 160.08829 0.890 1.88300 40.76 0.56679 30 12.00014 6.016 1.49700 81.54 0.53748 31 -158.21498 0.850 1.88300 40.76 0.56679 32 29.96082 DD

[32] 33 141.85857 2.380 1.95906 17.47 0.65993 34 -111.48733 9.154 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0223] [Table 17]

[0224] Example 6

[0225] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.238 15.516 8.196 15.326 FNo. 2.88 2.88 2.88 2.87 2ω(°) 127.0 82.8 127.2 83.2 DD[9] 29.648 2.884 29.648 2.884 DD

[18] 3.490 2.833 3.490 2.833 DD

[26] 2.000 7.132 2.127 7.452 DD

[32] 3.432 8.874 3.305 8.555

[0226] [Table 18]

[0227] Example 6

[0228] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 2.1423762E-04 2.1440967E-04 -4.4333454E-05 -4.2166156E-05 A5 -1.2860612E-05 -1.4833935E-05 -6.7407497E-06 -1.4656569E-05 A6 -2.2230835E-06 -1.6725069E-06 5.7894923E-07 3.2751332E-06 A7 2.2005520E-07 -2.6036575E-09 1.2265825E-07 -7.4943007E-09 A8 9.9925805E-09 1.2874461E-08 -8.0755244E-09 -7.4707534E-08 A9 -1.7282871E-09 2.7825445E-09 -1.2695205E-09 7.6514628E-09 A10 -1.9846229E-12 -2.0831625E-10 1.0802086E-10 8.2849948E-10 A11 7.7561162E-12 -3.4586025E-11 1.0254071E-11 -1.6617348E-10 A12 -1.7228286E-13 2.5251030E-12 -1.1173814E-12 -3.0949327E-12 A13 -2.0928965E-14 2.0736951E-13 -5.4518550E-14 1.7223681E-12 A14 7.7750415E-16 -1.6062516E-14 6.6420253E-15 -2.5351650E-14 A15 3.3579792E-17 -6.9067559E-16 1.6104324E-16 -9.7966289E-15 A16 -1.6239313E-18 5.3904155E-17 -2.1276004E-17 3.2648525E-16 A17 -2.9466587E-20 1.2233749E-18 -2.3466829E-19 2.9236360E-17 A18 1.7139629E-21 -9.1154381E-20 3.4456476E-20 -1.3248173E-18 A19 1.0874543E-23 -9.0037505E-22 1.2873223E-22 -3.5650707E-20 A20 -7.3870423E-25 6.1179838E-23 -2.2189480E-23 1.9101090E-21

[0229] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.9849890E-05 3.2218499E-05 1.0918038E-05 1.1989134E-04 A5 -7.6007113E-06 -1.1886776E-05 -6.0674016E-06 -3.3785499E-05 A6 -6.9919185E-07 8.9983427E-06 -1.1736718E-06 9.2147691E-07 A7 8.4763986E-07 -2.4027339E-06 2.7572327E-07 1.6475087E-06 A8 7.2612963E-08 -1.1557586E-07 2.5619232E-08 -2.5134088E-07 A9 -8.4585482E-08 1.7378028E-07 -8.4908382E-09 -3.2029399E-08 A10 5.3796563E-10 -1.8299834E-08 1.0637345E-11 9.6163797E-09 A11 4.5791792E-09 -4.5748454E-09 1.7020255E-10 1.1581511E-10 A12 -3.0070219E-10 9.1518481E-10 -1.2272838E-11 -1.7967278E-10 A13 -1.2826106E-10 4.4411464E-11 -2.1763795E-12 5.7956884E-12 A14 1.2817630E-11 -1.9280095E-11 2.8328002E-13 1.8364760E-12 A15 1.9257080E-12 3.7346071E-13 1.7104935E-14 -1.0312909E-13 A16 -2.3826486E-13 1.7938670E-13 -3.1210304E-15 -9.8248294E-15 A17 1.4911582E-14 -9.1401909E-15 -7.5201681E-17 7.0088430E-16 A18 2.1374327E-15 -6.4700736E-16 1.7567024E-17 2.1530224E-17 A19 4.7350473E-17 5.1025190E-17 1.4141081E-19 -1.7689095E-18 A20 -7.6372357E-18 -5.4238076E-19 -4.0498652E-20 2.2781682E-22

[0230] [Example 7]

[0231] A cross-sectional view and a schematic moving trajectory of the zoom lens of Example 7 are shown in FIG. Figure 8The zoom lens of Example 7 is composed, in order from the object side to the image side, of a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having positive refractive power, a fifth lens group G5 having negative refractive power, and a sixth lens group G6 having positive refractive power. When zooming from the wide-angle end to the telephoto end, the first lens group G1 moves toward the image side, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 move toward the object side, and the sixth lens group G6 remains fixed relative to the image plane Sim, with all intervals between adjacent lens groups changing. The first lens group G1 consists of five lenses, L11 to L15, in order from the object side to the image side. The second lens group G2 consists of the aperture stop St and five lenses, L21 to L25, in order from the object side to the image side. The third lens group G3 consists of two lenses, L31 to L32, in order from the object side to the image side. The fourth lens group G4 consists of three lenses, L41 to L43, in order from the object side to the image side. The fifth lens group G5 consists of four lenses, L51 to L54, in order from the object side to the image side. The sixth lens group G6 consists of one lens, L61. The focus lens group Gf is the entire fifth lens group G5. The above is a schematic structure of the zoom lens of Example 7.

[0232] The basic lens data of the zoom lens of Example 7 is shown in Table 19, the specifications and variable surface spacing are shown in Table 20, the aspheric coefficients are shown in Table 21, and the various aberration diagrams are shown in Table 23. Figure 19 middle.

[0233] [Table 19]

[0234] Example 7

[0235] Sn R D Nd vd θgF 1 41.41349 2.050 1.85150 40.78 0.56958 2 23.68980 7.769 *3 199.98788 2.504 1.69350 53.18 0.54831 *4 18.73877 6.380 *5 28.19466 2.100 1.85108 40.12 0.56852 *6 17.30816 8.877 7 -40.03562 1.120 1.43875 94.66 0.53402 8 27.48902 4.908 1.95375 32.32 0.59015 9 786.83703 DD[9] 10(St) ∞ 1.300 *11 26.32190 4.783 1.69350 53.18 0.54831 *12 -38.38722 0.349 13 -67.29617 0.820 1.73623 52.87 0.54689 14 24.12365 2.232 1.59522 67.73 0.54426 15 206.47051 0.400 16 -317.40797 0.790 1.83256 44.74 0.55814 17 17.26597 3.377 1.64769 33.79 0.59393 18 -92.86424 DD

[18] 19 -168.26505 0.810 1.83838 42.57 0.56382 20 20.78142 4.333 1.59522 67.73 0.54426 21 -34.61154 DD

[21] ] 22 42.21395 0.880 1.82973 43.48 0.56192 23 18.02672 5.040 1.43875 94.66 0.53402 24 -48.65002 0.154 25 26.16490 5.758 1.43875 94.66 0.53402 26 -24.22834 DD

[26] *27 -61.27599 2.306 1.85135 40.10 0.56954 *28 -23.15576 0.154 29 139.18827 0.895 1.88300 40.76 0.56679 30 12.43898 5.652 1.49700 81.54 0.53748 31 -594.76701 0.850 1.88300 40.76 0.56679 32 25.22333 DD

[32] 33 295.93334 2.145 1.95906 17.47 0.65993 34 -107.09171 8.947 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 0.999

[0236] [Table 20]

[0237] Example 7

[0238] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.236 15.513 8.191 15.326 FNo. 2.89 2.88 2.71 2.86 2ω(°) 125.8 83.0 126.0 83.4 DD[9] 27.461 2.812 27.461 2.812 DD

[18] 3.629 2.866 3.629 2.866 DD

[21] 1.800 1.907 1.800 1.907 DD

[26] 2.304 5.348 2.432 5.632 DD

[32] 3.721 11.312 3.593 11.028

[0239] [Table 21]

[0240] Example 7

[0241] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8553228E-04 1.3000184E-04 -1.4792318E-04 -1.5306723E-04 A5 -1.1851358E-05 -8.4069821E-06 -1.5544082E-05 -1.4372529E-05 A6 -1.2659055E-06 -6.7543398E-07 4.8362473E-06 6.7974853E-06 A7 1.8761495E-07 -8.0505450E-08 2.4245530E-07 -1.1029997E-08 A8 -2.0805031E-10 1.8330809E-08 -8.8361107E-08 -1.4038291E-07 A9 -1.3997685E-09 2.7355343E-09 -2.3093577E-09 7.3217584E-09 A10 5.6155111E-11 -5.0180351E-10 9.7931536E-10 1.5624812E-09 A11 6.0301820E-12 -2.6844337E-11 1.5816741E-11 -1.5622836E-10 A12 -3.6807346E-13 6.0545668E-12 -6.9687921E-12 -8.3530659E-12 A13 -1.5795700E-14 1.3868447E-13 -7.0811183E-14 1.6187204E-12 A14 1.1731402E-15 -3.8440545E-14 3.1516817E-14 3.7421809E-16 A15 2.4898128E-17 -4.1488753E-16 1.8283073E-16 -9.2467812E-15 A16 -2.0814946E-18 1.3530839E-16 -8.6548556E-17 2.4016862E-16 A17 -2.1736241E-20 6.8958764E-19 -2.3636332E-19 2.7746103E-17 A18 1.9771119E-21 -2.5075486E-19 1.3073685E-19 -1.1489803E-18 A19 8.0896630E-24 -5.0042124E-22 1.1194514E-22 -3.4007141E-20 A20 -7.8808961E-25 1.9150718E-22 -8.3081387E-23 1.7533308E-21

[0242] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.2953078E-05 3.8187078E-05 -5.3074031E-05 6.4427925E-05 A5 -1.1431193E-05 -3.9115044E-06 3.8936446E-05 -2.5777359E-05 A6 3.4816488E-06 2.0305904E-06 -2.8717510E-05 3.6642664E-06 A7 3.0023422E-07 -6.5395269E-07 1.0298252E-05 9.4260637E-07 A8 -2.4371425E-07 1.4178091E-07 -1.7426583E-06 -3.5149342E-07 A9 -5.4670342E-09 1.4350928E-08 -1.8365173E-08 -3.2612970E-09 A10 1.1260902E-08 -1.6124062E-08 5.8733961E-08 1.2010914E-08 A11 2.2763050E-10 2.1475395E-09 -7.5510424E-09 -5.5705836E-10 A12 -4.0397419E-10 4.4367988E-10 -2.8707194E-10 -2.1914572E-10 A13 -2.2081897E-12 -1.1405504E-10 1.3616276E-10 1.5330299E-11 A14 9.5557490E-12 -3.5033932E-12 -7.1855743E-12 2.2915109E-12 A15 -1.2027268E-13 2.5423780E-12 -6.9735936E-13 -1.8377007E-13 A16 -1.2940446E-13 -7.6845163E-14 8.9041920E-14 -1.3387991E-14 A17 2.7726178E-15 -2.5146835E-14 -1.4816220E-15 1.0759703E-15 A18 9.0086136E-16 1.4584662E-15 -2.4309853E-16 3.8600887E-17 A19 -1.6533706E-17 1.0023624E-16 1.5679569E-17 -2.5074494E-18 A20 -2.4778335E-18 -7.5577201E-18 -3.2059225E-19 -3.7003863E-20

[0243] [Example 8]

[0244] The cross-sectional view and schematic movement trajectory of the zoom lens of Example 8 are shown in FIG. Figure 9The zoom lens of Example 8 has the same general structure as the zoom lens of Example 7, except that the third lens group G3 has negative refractive power. The basic lens data of the zoom lens of Example 8 is shown in Table 22, the specifications and variable surface spacing are shown in Table 23, the aspheric coefficients are shown in Table 24, and the various aberration diagrams are shown in Table 25. Figure 20 middle.

[0245] [Table 22]

[0246] Example 8

[0247] Sn R D Nd vd θgF 1 41.28848 2.050 1.85150 40.78 0.56958 2 23.79980 7.687 *3 180.00350 2.504 1.69350 53.18 0.54831 *4 18.77514 6.430 *5 28.05765 2.100 1.85108 40.12 0.56852 *6 17.24984 8.964 7 -37.41452 1.120 1.43875 94.66 0.53402 8 27.57374 4.978 1.95375 32.32 0.59015 9 717.69516 DD[9] 10(St) ∞ 1.300 *11 25.89581 5.160 1.69350 53.18 0.54831 *12 -37.94826 0.245 13 -69.40994 0.820 1.73135 51.51 0.55044 14 25.15690 2.208 1.59522 67.73 0.54426 15 235.28308 0.400 16 -373.54363 0.807 1.82926 45.07 0.55751 17 17.53423 4.254 1.64769 33.79 0.59393 18 -88.29190 DD

[18] 19 -100.00000 0.810 1.83438 41.71 0.56655 20 20.78142 4.317 1.59522 67.73 0.54426 21 -36.00000 DD

[21] ] 22 42.27530 0.958 1.83348 44.64 0.55836 23 18.00679 5.050 1.43875 94.66 0.53402 24 -47.63396 0.153 25 26.18926 5.898 1.43875 94.66 0.53402 26 -24.44917 DD

[26] *27 -61.27006 2.391 1.85135 40.10 0.56954 *28 -23.18567 0.150 29 139.58321 0.904 1.88300 40.76 0.56679 30 12.31147 5.630 1.49700 81.54 0.53748 31 -712.05790 0.850 1.88300 40.76 0.56679 32 25.13792 DD

[32] 33 235.51432 2.299 1.95906 17.47 0.65993 34 -94.05982 8.956 35 ∞ 2.850 1.51680 64.20 0.53430 36 ∞ 1.000

[0248] [Table 23]

[0249] Example 8

[0250] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.883 - - f 8.237 15.515 8.193 15.326 FNo. 2.88 2.88 2.88 2.87 2ω(°) 125.8 82.4 126.0 82.8 DD[9] 28.542 2.827 28.542 2.827 DD

[18] 3.443 3.029 3.443 3.029 DD

[21] 1.800 1.572 1.800 1.572 DD

[26] 2.516 6.639 2.646 6.946 DD

[32] 3.698 10.127 3.568 9.820

[0251] [Table 24]

[0252] Example 8

[0253] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.7817121E-04 1.2444958E-04 -1.5587216E-04 -1.6218411E-04 A5 -1.1802753E-05 -8.9427786E-06 -1.6729001E-05 -1.5553424E-05 A6 -1.1501893E-06 -6.1712191E-07 4.9713132E-06 6.9411257E-06 A7 1.8547406E-07 -6.5020599E-08 2.6695675E-07 9.1785685E-09 A8 -1.1206100E-09 1.8976916E-08 -8.9674357E-08 -1.4072804E-07 A9 -1.3787239E-09 2.5137525E-09 -2.5904793E-09 7.0965568E-09 A10 5.9938885E-11 -5.1833720E-10 9.8728804E-10 1.5282655E-09 A11 5.9228813E-12 -2.4987063E-11 1.7759970E-11 -1.5463453E-10 A12 -3.7586298E-13 6.1853726E-12 -7.0000889E-12 -7.6510182E-12 A13 -1.5476728E-14 1.2913358E-13 -7.9095186E-14 1.6117876E-12 A14 1.1765419E-15 -3.8945337E-14 3.1594679E-14 -6.3305179E-15 A15 2.4343431E-17 -3.8518743E-16 2.0414552E-16 -9.2294545E-15 A16 -2.0644460E-18 1.3624220E-16 -8.6659745E-17 2.7514649E-16 A17 -2.1213337E-20 6.3836977E-19 -2.6670701E-19 2.7725498E-17 A18 1.9449063E-21 -2.5128020E-19 1.3080572E-19 -1.2447243E-18 A19 7.8832520E-24 -4.6287962E-22 1.3029291E-22 -3.4001309E-20 A20 -7.7021012E-25 1.9115709E-22 -8.3081387E-23 1.8610909E-21

[0254] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.4210051E-05 4.3913590E-05 -5.5075379E-05 6.2703642E-05 A5 -8.3583091E-06 -6.2397130E-06 3.6892406E-05 -2.7867151E-05 A6 2.6445290E-06 2.0885726E-06 -2.8501178E-05 3.9373888E-06 A7 2.3587006E-08 -4.6298237E-07 1.0455105E-05 1.0595667E-06 A8 -1.4699944E-07 1.4356892E-07 -1.7515840E-06 -3.5913547E-07 A9 8.3253169E-09 2.4151710E-09 -2.5022612E-08 -7.3773982E-09 A10 5.8951528E-09 -1.6370228E-08 5.8893509E-08 1.1939750E-08 A11 -1.8396741E-10 2.6052287E-09 -7.3858674E-09 -4.6433025E-10 A12 -2.3322022E-10 4.5039701E-10 -2.8754647E-10 -2.1130212E-10 A13 5.3055800E-12 -1.2441622E-10 1.3371201E-10 1.4016372E-11 A14 6.2855015E-12 -3.5736137E-12 -7.2125746E-12 2.1167422E-12 A15 -2.0253567E-13 2.6773523E-12 -6.7596338E-13 -1.7252059E-13 A16 -9.2258767E-14 -7.6802008E-14 8.9481906E-14 -1.1503559E-14 A17 3.2688325E-15 -2.6082185E-14 -1.5829260E-15 1.0229135E-15 A18 6.7081531E-16 1.4629201E-15 -2.4587246E-16 2.8365930E-17 A19 -1.7801597E-17 1.0290669E-16 1.5880101E-17 -2.4016237E-18 A20 -1.8802842E-18 -7.5818878E-18 -3.1409511E-19 -1.4533514E-20

[0255] [Example 9]

[0256] A cross-sectional view and a schematic moving trajectory of the zoom lens of Example 9 are shown in FIG. Figure 10 The zoom lens of Example 9 is composed, in order from the object side to the image side, of a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, and a third lens group G3 having negative refractive power. When zooming from the wide-angle end to the telephoto end, the first lens group G1 moves toward the image side, and the second and third lens groups G2 and G3 move toward the object side, causing all the intervals between adjacent lens groups to change. The first lens group G1 is composed of five lenses, L11 to L15, in order from the object side to the image side. The second lens group G2 is composed of ten lenses, L21 to L30, in order from the object side to the image side. The third lens group G3 is composed of four lenses, L31 to L34, in order from the object side to the image side. The focus lens group Gf is the entire third lens group G3.

[0257] The basic lens data of the zoom lens of Example 9 is shown in Table 25, the specifications and variable surface spacing are shown in Table 26, the aspheric coefficients are shown in Table 27, and the various aberration diagrams are shown in Table 28. Figure 21 middle.

[0258] [Table 25]

[0259] Example 9

[0260] Sn R D Yes etc. θgF 1 37.99918 2.050 1.71897 55.55 0.54271 2 24.17952 5.101 *3 35.85033 2.504 2.00001 23.18 0.62355 *4 19.06832 4.938 *5 42.99544 2.100 1.85108 40.12 0.56852 *6 16.97544 11.741 7 -33.00862 1.120 1.43875 94.66 0.53402 8 30.18923 4.645 1.95375 32.32 0.59015 9 6769.26125 DD[9] 10(Mon) ∞ 1.300 *11 30.66930 6.569 1.77632 50.37 0.54870 *12 -41.97745 0.100 13 -72.34341 0.820 1.74057 49.63 0.55390 14 24.55432 2.480 1.49700 81.54 0.53748 15 -340.45558 0.919 16 -492.43359 0.790 1.83328 44.67 0.55828 17 17.46525 3.460 1.67995 31.43 0.59475 18 -82.20649 3.000 19 -157.76127 0.810 1.84642 43.36 0.56090 20 20.32879 4.384 1.59522 67.73 0.54426 21 -34.31739 1.499 22 47.63975 0.880 1.85605 42.39 0.56292 23 18.05021 4.994 1.43875 94.66 0.53402 24 -45.78783 0.398 25 27.10191 5.772 1.43875 94.66 0.53402 26 -22.80653 DD

[26] *27 -53.93129 2.150 1.85135 40.10 0.56954 *28 -23.82934 0.100 29 278.71803 0.890 1.88300 40.76 0.56679 30 12.71252 5.610 1.49700 81.54 0.53748 31 84.11043 0.850 1.88300 40.76 0.56679 32 30.46524 DD

[32] 33 ∞ 2.850 1.51680 64.20 0.53430 34 ∞ 0.999

[0261] [Table 26]

[0262] Example 9

[0263] W-Infinity T-Infinitv W-500mm T-500mm Zr 1.000 1.883 - - f 9.267 17.454 9.200 17.115 FNo. 2.88 3.05 2.89 3.05 2ω(°) 121.0 76.6 121.2 77.2 DD[9] 30.189 2.702 30.189 2.702 DD

[26] 2.004 6.002 2.147 6.352 DD

[32] 14.911 20.579 14.768 20.229

[0264] [Table 27]

[0265] Example 9

[0266] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 4.3579078E-06 -3.7647125E-05 2.5118056E-06 2.4038898E-05 A5 6.1108418E-07 3.2857428E-06 -1.4092283E-06 2.7797585E-06 A6 1.1776328E-07 5.0274397E-07 1.4526221E-06 1.3007142E-06 A7 1.0115853E-08 -6.6981646E-08 1.4139088E-07 1.8378201E-08 A8 -2.4062256E-09 1.4858137E-09 -3.0260189E-08 -2.6143690E-08 A9 -1.6471722E-10 7.8665955E-10 -2.1843838E-09 -4.0100028E-10 A10 1.6766142E-11 -1.0104289E-10 3.0167062E-10 2.5400355E-10 A11 1.0477521E-12 -5.6742015E-12 1.8895037E-11 -6.6204539E-12 A12 -5.4951876E-14 9.8123825E-13 -1.9514802E-12 -1.7451201E-12 A13 -3.5612552E-15 2.5892073E-14 -9.4488704E-14 1.9784564E-13 A14 8.0877467E-17 -4.1347873E-15 8.4303048E-15 6.5258629E-15 A15 6.7812206E-18 -7.2494749E-17 2.6281415E-16 -1.8124128E-15 A16 -1.4094079E-20 7.4163194E-18 -2.2544121E-17 1.1663618E-17 A17 -6.8304100E-21 1.1284937E-19 -3.7122465E-19 7.2364181E-18 A18 -9.1130345E-23 -1.7775910E-21 3.2758004E-20 -1.7946465E-19 A19 2.8371738E-24 -7.4427328E-23 2.0425494E-22 -1.0652633E-20 A20 7.2328607E-26 -6.7144633E-24 -1.9438197E-23 3.8746057E-22

[0267] Sn 11 12 27 28 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.6946070E-06 -1.2927788E-06 -8.1522204E-05 2.2257820E-05 A5 -9.0052179E-06 1.8404413E-05 4.4785414E-05 -2.0695347E-05 A6 1.9598414E-06 -2.9902905E-06 -2.7303849E-05 6.3009873E-06 A7 2.2991459E-07 -1.5386880E-06 1.0161013E-05 5.6988808E-07 A8 -7.3086519E-08 6.1195410E-07 -1.8123594E-06 -4.5670856E-07 A9 -2.6441714E-08 8.5266581E-09 -1.7874046E-08 1.2437554E-08 A10 4.4460171E-09 -3.5989259E-08 6.1361268E-08 1.4661368E-08 A11 1.6807750E-09 3.8337577E-09 -7.4833603E-09 -9.5145924E-10 A12 -2.8826307E-10 8.8503967E-10 -3.5265530E-10 -2.6110524E-10 A13 -4.4750000E-11 -1.7729499E-10 1.3425097E-10 2.1342391E-11 A14 9.1887318E-12 -8.0299735E-12 -6.1448677E-12 2.7085617E-12 A15 5.2209189E-13 3.6758768E-12 -6.7366121E-13 -2.3820354E-13 A16 -1.4238812E-13 -7.7251489E-14 7.9031516E-14 -1.5904921E-14 A17 -2.1183120E-15 -3.5360385E-14 -1.6260453E-15 1.3447522E-15 A18 1.0437771E-15 1.8530613E-15 -1.9023049E-16 4.6900274E-17 A19 -1.7320943E-18 1.3729732E-16 1.6031226E-17 -3.0643517E-18 A20 -2.8234116E-18 -9.8547997E-18 -4.3787098E-19 -4.8156187E-20

[0268] [Example 10]

[0269] A cross-sectional view and a schematic moving trajectory of the zoom lens of Example 10 are shown in FIG. Figure 11 The zoom lens of Example 10 has the same general structure as the zoom lens of Example 1, except that the second lens group G2 is composed of three lenses, namely, aperture stop St and lenses L21 to L23, in order from the object side to the image side. The basic lens data of the zoom lens of Example 10 is shown in Table 28, the specifications and variable surface spacing are shown in Table 29, the aspheric coefficients are shown in Table 30, and the various aberration diagrams are shown in Figure 22 middle.

[0270] [Table 28]

[0271] Example 10

[0272] Sn R D Yes etc. θgF 1 38.83843 2.050 2.00100 29.13 0.59952 2 24.81705 5.377 *3 178.21729 2.504 1.61881 63.85 0.54182 *4 20.19309 5.936 *5 27.60432 2.100 1.85135 40.10 0.56954 *6 17.98825 9.721 7 -37.48868 1.155 1.48749 70.44 0.53062 8 22.37597 5.287 1.98423 28.81 0.60204 9 85.39061 DD[9] 10(Mon) ∞ 1.300 *11 31.29381 5.414 1.49710 81.56 0.53848 *12 -32.44803 0.700 13 -478.66283 0.710 1.82761 45.24 0.55720 14 22.66145 2.928 1.72717 28.77 0.60157 15 291.93512 DD

[15] 16 -176.40583 0.810 1.84317 43.68 0.56023 17 21.84639 4.444 1.59522 67.73 0.54426 18 -31.58888 2.000 19 33.09781 0.710 1.87525 40.48 0.56722 20 16.90117 6.030 1.43875 94.66 0.53402 21 -90.33111 0.672 22 26.61789 5.480 1.49710 81.56 0.53848 23 -28.19034 DD

[23] *24 -65.30460 2.254 1.80139 45.45 0.55814 *25 -20.94046 0.100 26 -116.23532 0.915 1.88300 40.76 0.56679 27 12.01637 4.943 1.48749 70.44 0.53062 28 42.59105 0.890 2.00100 29.13 0.59952 29 25.03413 DD

[29] 30 266.58306 2.476 2.00272 19.32 0.64514 31 -79.08354 8.637 32 ∞ 2.850 1.51680 64.20 0.53430 33 ∞ 0.999

[0273] [Table 29]

[0274] Example 10

[0275] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.885 - - f 8.240 15.533 8.197 15.348 FNo. 4.12 4.12 4.12 4.09 2ω(°) 126.6 81.4 126.8 82.0 DD[9] 28.420 3.583 28.420 3.583 DD

[15] 7.280 5.934 7.280 5.934 DD

[23] 2.267 6.676 2.373 6.937 DD

[29] 3.387 9.151 3.281 8.890

[0276] [Table 30]

[0277] Example 10

[0278] Sn 3 4 5 6 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.9988206E-04 2.2009889E-04 -2.6325038E-05 -2.5890038E-05 A5 -4.7884304E-06 -1.0663953E-05 -5.7523622E-06 1.9710509E-06 A6 -1.8522010E-06 -1.7633881E-06 1.5282618E-06 3.4973820E-07 A7 9.6926862E-08 2.3494988E-07 8.3207313E-08 -3.5512780E-08 A8 7.0116788E-09 -3.4605810E-09 -3.1985403E-08 8.4350774E-09 A9 -8.1338669E-10 -3.0732589E-09 -7.4922729E-10 -1.4286840E-10 A10 6.2196004E-12 1.5039080E-10 3.6791953E-10 -2.5462979E-10 A11 3.8306313E-12 2.4944170E-11 4.2829353E-12 9.7842492E-12 A12 -1.5985066E-13 -1.1592000E-12 -2.4659380E-12 3.2348980E-12 A13 -1.0751405E-14 -1.2363197E-13 -1.5690233E-14 -1.1585534E-13 A14 6.4095225E-16 5.1641000E-15 9.9352692E-15 -2.3229015E-14 A15 1.7820004E-17 3.6213610E-16 3.5325188E-17 6.5232270E-16 A16 -1.2614112E-18 -1.5549728E-17 -2.3984950E-17 9.7319306E-17 A17 -1.6088054E-20 -5.7615451E-19 -4.3808930E-20 -1.8232077E-18 A18 1.2725085E-21 2.8974518E-20 3.2320249E-20 -2.2629889E-19 A19 6.0996528E-24 3.8383269E-22 2.2332247E-23 2.0560322E-21 A20 -5.2582305E-25 -2.4030749E-23 -1.8866554E-23 2.3213927E-22

[0279] Sn 11 12 24 25 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.8131929E-05 2.9461519E-05 9.7916315E-06 1.2671312E-04 A5 -1.1623542E-05 -1.2037429E-06 1.2360732E-06 -2.6567039E-05 A6 1.1508714E-06 3.0985175E-06 -5.5252711E-06 -4.8731882E-07 A7 9.7231567E-07 -4.6213219E-07 1.1267236E-06 1.8568389E-06 A8 -1.8473299E-07 -2.5190760E-07 2.0764734E-07 -2.0238319E-07 A9 -4.5550852E-08 7.1919616E-08 -7.7624633E-08 -5.4245866E-08 A10 1.1178587E-08 6.6202336E-09 -1.6843708E-09 9.5285746E-09 A11 1.4330916E-09 -3.9519480E-09 2.3591950E-09 8.3542650E-10 A12 -3.9796202E-10 7.8278058E11 -7.5970152E-11 -2.1185700E-10 A13 -2.8191691E-11 1.1365987E-10 -3.9277257E-11 -6.4079304E-12 A14 8.6365562E-12 -8.6181468E-12 2.3487847E-12 2.6838311E-12 A15 3.2889333E-13 -1.8044608E-12 3.7105894E-13 1.3189721E-14 A16 -1.1093195E-13 2.0416055E-13 -2.8582230E-14 -1.9789987E-14 A17 -2.0838167E-15 1.4964872E-14 -1.8684311E-15 1.1141902E-16 A18 7.7164688E-16 -2.1487185E-15 1.6679874E-16 7.9323252E-17 A19 5.5291926E-18 -5.0592800E-17 3.8989609E-18 -5.3075735E-19 A20 -2.2362317E-18 8.7275034E-18 -3.8550221E-19 -1.3413935E-19

[0280] [Example 11]

[0281] A cross-sectional view and a schematic moving trajectory of the zoom lens of Example 11 are shown in FIG. Figure 12The zoom lens of Example 11 has the same general structure as the zoom lens of Example 1, except that the second lens group G2 is composed of the aperture stop St and three lenses L21 to L23 in order from the object side to the image side, the third lens group G3 is composed of four lenses L31 to L34 in order from the object side to the image side, and the fourth lens group G4 is composed of three lenses L41 to L43 in order from the object side to the image side. The basic lens data of the zoom lens of Example 11 is shown in Table 31, the specifications and variable surface intervals are shown in Table 32, the aspheric coefficients are shown in Tables 33 and 34, and the various aberration diagrams are shown in Figure 23 middle.

[0282] [Table 31]

[0283] Example 11

[0284] Sn R D Yes etc. θgF *1 38.01958 2.100 1.85344 33.58 0.58902 *2 21.67083 6.500 *3 49.75342 2.262 1.78355 49.64 0.54977 *4 18.81885 7.613 5 42.22009 1.800 1.68191 57.40 0.54263 6 18.94412 11.882 7 -29.44155 1.300 1.49700 81.54 0.53748 8 63.89485 0.300 9 50.54214 4.750 1.91082 35.25 0.58224 10 -70.20454 DD

[10] 11(Wed) ∞ 1.300 *12 20.93165 3.000 1.49710 81.56 0.53848 *13 58.85146 3.296 14 174.57085 0.710 1.81330 24.43 0.61471 15 14.32932 6.000 1.73658 28.17 0.60317 16 -32.59552 DD

[16] 17 96.80123 2.010 1.58335 39.66 0.57725 18 -143.06846 0.710 1.77264 49.26 0.55182 19 12.42943 4.000 1.49700 81.54 0.53748 20 57.90386 1.628 *21 27.68454 6.068 1.49710 81.56 0.53848 *22 -22.01245 DD

[22] *23 85.62851 3.008 1.68948 31.02 0.59874 *24 -41.08714 0.100 25 500.70959 1.010 2.00069 25.46 0.61364 26 14.88552 4.500 1.49700 81.54 0.53748 27 40.04588 DD

[27] 28 616.37490 2.255 1.81797 32.50 0.59283 29 -114.53368 10.393 30 ∞ 2.850 1.51680 64.20 0.53430 31 ∞ 1.000

[0285] [Table 32]

[0286] Example 11

[0287] W-Infinity T-Infinity W-500mm T-500mm Zr 1.000 1.885 - - f 8.242 15.537 8.199 15.391 FNo. 2.88 2.88 2.88 2.87 2ω(°) 127.4 85.8 127.6 85.8 DD

[10] 29.049 1.905 29.049 1.905 DD

[16] 2.000 1.977 2.000 1.977 DD

[22] 2.090 1.999 2.364 2.521 DD

[27] 3.000 15.096 2.726 14.574

[0288] [Table 33]

[0289] Example 11

[0290] Sn 1 2 3 4 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 2.3538914E-06 -6.1204523E-06 1.2112840E-05 1.3975901E-05 A5 -3.4907564E-08 -5.3472016E-08 -7.4620073E-09 -1.5061890E-07 A6 -4.4722488E-09 -4.3584587E-09 6.6324806E-09 -5.1554822E-09 A7 4.3913012E-11 -9.2519054E-11 -1.5157417E-10 4.2577001E-10 A8 -2.7550962E-13 2.7468421E-12 1.0339000E-11 2.8085677E-11 A9 1.1425808E-15 -9.1925037E-14 1.9791555E-13 -4.8544102E-13 A10 -7.8590812E-16 -1.5338856E-14 1.1545987E-14 -3.1533737E-14 A11 -4.1648225E-18 8.2566210E-18 2.9601859E-16 -2.6247435E-16 A12 1.0747580E-18 -2.3837349E-17 5.2816041E-17 -8.9734797E-16 A13 -5.0833046E-22 1.6661231E-19 -5.8674993E-19 -1.1351214E-17 A14 1.4697881E-21 4.8059808E-20 1.5290329E-20 6.0284294E-19 A15 1.2803528E-24 5.8639768E-22 -5.9878088E-22 2.8994109E-21 A16 1.3808693E-24 2.3949824E-22 -3.5280410E-23 -3.8481462E-21 A17 -2.5706403E-27 4.6754151E-25 -6.8874513E-25 -1.7011615E-23 A18 -1.6908626E-28 3.0085461E-25 -8.8996738E-27 -1.6401607E-23 A19 -5.7251870E-30 1.2814567E-27 3.2557651E-27 -3.1846491E-27 A20 -1.8105323E-30 -1.9856837E-27 -3.2952552E-28 -3.3725389E-26

[0291] Sn 12 13 21 22 KA 1.0000000E+00 1.0000000E+00 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.2438273E-05 5.7094962E-05 -3.3920976E-05 -2.7234264E-05 A5 3.2438500E-07 3.6641458E-07 9.1209364E-08 -4.7392270E-08 A6 6.7064519E-08 1.3547340E-07 -9.1075703E-08 -1.0451403E-07 A7 9.0662184E-09 -2.0551815E-08 6.6879648E-10 3.1133983E-10 A8 1.8201054E-09 9.1324518E-09 4.7101690E-10 -3.3831822E-10 A9 -1.1401647E-10 -5.6857535E-10 7.4650881E-12 -2.9938769E-12 A10 -5.2325496E-11 -4.6323958E-11 9.3430648E-13 4.7431754E-12 A11 -3.1240698E-12 2.7073350E-12 -1.2993896E-13 -1.3962563E-13 A12 1.3366222E-12 -6.2383808E-13 -8.7353465E-15 -8.3874335E-14 A13 1.9997329E-15 5.8218492E-15 1.7710798E-15 2.8923215E-15 A14 -4.1895357E-15 1.6006435E-14 -9.9429173E-16 -1.0284337E-16 A15 3.5085904E-16 1.5149915E-15 4.2495272E-17 8.8453051E-18 A16 -8.3138080E-17 -2.4668233E-16 1.3131198E-18 1.3296931E-18 A17 -3.8192093E-18 1.4115625E-17 4.2892092E-20 -1.7747536E-19 A18 1.4963264E-18 -2.6533787E-18 1.3021721E-20 3.5448239E-21 A19 -2.1099707E-19 -1.6589720E-19 2.4739017E-21 -2.7073562E-21 A20 1.4025700E-20 3.1529794E-20 -2.6700698E-22 2.5008909E-22

[0292] [Table 34]

[0293] Example 11

[0294] Sn 23 24 KA 1.0000000E+00 1.0000000E+00 A3 0.0000000E+00 0.0000000E+00 A4 2.4655987E-05 5.9031115E-05 A5 1.0515050E-07 1.8664432E-07 A6 1.0268190E-07 1.7747794E-08 A7 7.1369499E-11 2.7928601E-10 A8 4.3488916E-13 -4.1694372E-10 A9 2.7915694E-11 4.9870126E-13 A10 -1.0914253E-12 1.1023631E-12 A11 -3.4033712E-14 4.1779752E-14 A12 -4.8664457E-14 3.1863440E-15 A13 1.7202965E-15 2.9318215E-15 A14 9.6695648E-17 -3.0190039E-16 A15 -2.4331206E-19 1.3471653E-17 A16 5.0914166E-18 -4.7314493E-18 A17 2.6786239E-20 3.4994751E-19 A18 -1.7253807E-19 -1.4489281E-19 A19 3.8700030E-21 4.4688877E-21 A20 7.9498617E-22 8.4953025E-22

[0295] Table 35 shows the corresponding values ​​of conditional expressions (1) to (12) for the zoom lenses of Examples 1 to 11. Examples 1 to 11 use the d-line as the reference wavelength. Table 35 shows the values ​​based on the d-line.

[0296] [Table 35]

[0297]

[0298] As can be seen from the above data, the zoom lenses of Examples 1 to 11 have a maximum full angle of view of over 120 degrees when focused on an object at infinity at the wide-angle end, ensuring a wide angle of view, a compact structure, and excellent correction of various aberrations, thereby achieving high optical performance.

[0299] Next, an imaging device according to an embodiment of the present invention will be described. Figure 24 and Figure 25 2 shows an external view of a camera 30 which is an imaging device according to an embodiment of the present invention. Figure 24 1 is a perspective view of the camera 30 as viewed from the front side. Figure 25 The camera 30 is shown in a perspective view from the back. The camera 30 is a mirrorless digital camera with a detachable interchangeable lens 20. The interchangeable lens 20 includes the zoom lens 1 according to the embodiment of the present invention housed in a lens barrel.

[0300] The camera 30 includes a camera body 31, and a shutter button 32 and a power button 33 are provided on the top surface of the camera body 31. Furthermore, an operation unit 34, an operation unit 35, and a display unit 36 ​​are provided on the back surface of the camera body 31. The display unit 36 ​​displays the captured image and images that existed within the angle of view before the image was captured.

[0301] A photographic opening for incident light from a photographic subject is provided in the front center of the camera body 31 . A bayonet mount 37 is provided at a position corresponding to the photographic opening, and the interchangeable lens 20 is mounted on the camera body 31 via the bayonet mount 37 .

[0302] The camera body 31 is equipped with an imaging element (not shown), such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor), that outputs an imaging signal corresponding to the subject image formed by the interchangeable lens 20; a signal processing circuit that processes the imaging signal output by the imaging element to generate an image; and a recording medium for recording the generated image. The camera 30 can capture still or moving images by pressing the shutter button 32, and the image data obtained by the capture is recorded on the recording medium.

[0303] 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 numerical examples above and may take other values.

[0304] Furthermore, the imaging device according to the embodiment of the present invention is not limited to the above-mentioned examples, and can be implemented in various forms, such as cameras other than mirrorless cameras, film cameras, video cameras, movie cameras, and broadcast cameras.

Claims

1. A zoom lens comprising, in order from the object side toward the image side, a first lens group having negative refractive power, a second lens group having positive refractive power, and subsequent lens groups, During zooming, as at least the first lens group and the second lens group move, the intervals between the first lens group, the second lens group, and the subsequent lens groups change. When focusing from an object at infinity to an object at close range, the focus lens group located closer to the image side than the first lens group moves. The first lens group includes, in order from the object side toward the image side, a negative lens, a negative lens with a convex surface facing the object side, and a negative lens. The first lens group includes a positive lens on the image side. A biconcave lens is disposed adjacent to the object side of the positive lens closest to the image side of the first lens group. The total number of cemented lenses is four, arranged on the image side relative to the first lens group, and including, in order from the object side, a negative lens whose object-side surface is in contact with air and a positive lens whose image-side surface is in contact with air. The air-converted distance on the optical axis from the lens surface closest to the image side to the image plane when focusing on an object at infinity at the wide-angle end is BFw. The focal length of the zoom lens in a state of focusing on an object at infinity at the wide-angle end is fw. Let ωw be the maximum half angle of view when focusing on an object at infinity at the wide-angle end. When the open F value at the wide-angle end is set to FNow, the following conditional expressions (8-4) and (9) are satisfied: 0.714≤BFw / (fw×tanωw)<1.5 (8-4) 0.45<tanωw / FNow<1 (9), The subsequent lens group is composed of a third lens group with positive refractive power and a fourth lens group with negative refractive power in order from the object side to the image side, and the third lens group and the fourth lens group move when the magnification is changed, or, The subsequent lens group only includes a third lens group having a negative refractive power that moves during zooming, or, The subsequent lens group is composed of a third lens group with positive refractive power, a fourth lens group with negative refractive power, and a fifth lens group with positive refractive power in order from the object side to the image side. When the magnification is changed, the third lens group and the fourth lens group move, and the fifth lens group is fixed, or The subsequent lens group is composed of a third lens group with positive or negative refractive power, a fourth lens group with positive refractive power, a fifth lens group with negative refractive power and a sixth lens group with positive refractive power from the object side to the image side. When changing the magnification, the third lens group, the fourth lens group and the fifth lens group move, and the sixth lens group is fixed.

2. The zoom lens according to claim 1, wherein: The following conditional expression (8-5) is satisfied: 0.736≤BFw / (fw×tanωw)<1.3 (8-5).

3. The zoom lens according to claim 1 or 2, wherein: When focusing from an infinitely distant object to a close object, only one focusing lens group moves. The focusing lens group includes a cemented lens.

4. A camera device having a zoom lens, The zoom lens is composed of a first lens group with negative refractive power, a second lens group with positive refractive power, and subsequent lens groups in order from the object side to the image side. During zooming, as at least the first lens group and the second lens group move, the intervals between the first lens group, the second lens group, and the subsequent lens groups change. When focusing from an object at infinity to an object at close distance, the focus lens group arranged on the image side of the first lens group moves. The first lens group includes, in order from the object side toward the image side, a negative lens, a negative lens with a convex surface facing the object side, and a negative lens. The first lens group includes a positive lens on the image side. A biconcave lens is disposed adjacent to the object side of the positive lens closest to the image side of the first lens group. The total number of cemented lenses is four, arranged on the image side relative to the first lens group and including, in order from the object side, a negative lens whose object-side surface is in contact with air and a positive lens whose image-side surface is in contact with air. The air-converted distance on the optical axis from the lens surface closest to the image side to the image plane when focusing on an object at infinity at the wide-angle end is BFw. The focal length of the zoom lens in a state of focusing on an object at infinity at the wide-angle end is fw. Let ωw be the maximum half angle of view when focusing on an object at infinity at the wide-angle end. When the open F value at the wide-angle end is set to FNow, the following conditional expressions (8-4) and (9) are satisfied: 0.714≤BFw / (fw×tanωw)<1.5 (8-4) 0.45<tanωw / FNow<1 (9), The subsequent lens group is composed of a third lens group with positive refractive power and a fourth lens group with negative refractive power in order from the object side to the image side, and the third lens group and the fourth lens group move when the magnification is changed, or, The subsequent lens group only includes a third lens group having a negative refractive power that moves during zooming, or, The subsequent lens group is composed of a third lens group with positive refractive power, a fourth lens group with negative refractive power, and a fifth lens group with positive refractive power in order from the object side to the image side. When the magnification is changed, the third lens group and the fourth lens group move, and the fifth lens group is fixed, or The subsequent lens group is composed of a third lens group with positive or negative refractive power, a fourth lens group with positive refractive power, a fifth lens group with negative refractive power and a sixth lens group with positive refractive power from the object side to the image side. When changing the magnification, the third lens group, the fourth lens group and the fifth lens group move, and the sixth lens group is fixed. The imaging device according to claim 4 , wherein: The following conditional expression (8-5) is satisfied: 0.736≤BFw / (fw×tanωw)<1.3 (8-5).

6. The imaging device according to claim 4 or 5, wherein: When focusing from an infinitely distant object to a close object, only one focusing lens group moves. The focusing lens group includes a cemented lens.

Images