Zoom lens and imaging device

Abstract

To provide a zoom lens which is advantageous in terms of a wide angle of view, a high zoom ratio, compactness, light weight, and superior optical performance.SOLUTION: A zoom lens provided herein comprises a first lens group(positive) configured to be stationary when zooming, three or more intermediate lens groups configured to move while zooming, and a rear lens group (positive) configured to be stationary when zooming, in order from the object side, and is configured such that distances between adjacent lens groups change while zooming. The three or more intermediate lens groups include a lens group V1 (negative) and a lens group V2 (negative) arranged successively in order from the object side. The lens groups V1, V2 move toward the image side while zooming from the wide-angle end to the telephoto end in such a way that a distance therebetween is less in the middle of a zooming range than at the wide-angle end. The first lens group comprises a first sub lens group configured to be stationary when focusing and a second sub lens group (positive) configured to move toward the object side when shifting focus from infinity to a short distance. Displacements mv1, mv2 of the lens groups V1, V2 from the wide-angle end to the telephoto end, a focal length f1 of the first lens group, and a composite focal length f1n of one or more lenses with negative refractive power arranged successively from the most object side in the first sub lens group satisfy specific conditions.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a zoom lens and an imaging device.

Background Art

[0002] Zoom lenses used in imaging devices such as television cameras, movie cameras, digital still cameras, video cameras, etc. are required to be small and lightweight for high usability, and also to have a wide angle of view, a high zoom ratio, and high optical performance. In addition, with the use of imaging elements corresponding to high resolutions such as 4K and 8K, it is required to have high resolution from the center to the periphery of the image and little chromatic aberration.

[0003] As a zoom lens with a wide angle of view and a high zoom ratio, a positive lead type zoom lens in which a first lens group with a positive refractive power and a second lens group with a negative refractive power for zooming are arranged in order from the object side to the image side is known. In Patent Document 1 and Patent Document 2, a zoom lens including a first lens group with a positive refractive power that does not move for zooming, a plurality of moving lens groups that move for zooming, and a rear lens group with a positive refractive power that does not move for zooming is disclosed in order from the object side to the image side. Note that the so-called compensator lens group in a zoom lens is a moving lens group that moves to compensate for the movement of the image plane during zooming, and is also referred to as a moving lens group that moves for zooming.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Patent Document 1 discloses a zoom lens with a half-angle of view of approximately 35° at the wide-angle end and a zoom ratio of approximately 20. However, to further widen the angle of view or increase the zoom ratio of this zoom lens, the absolute value of the refractive power of the second lens group increases, which can be disadvantageous in terms of optical performance and compactness. Patent Document 2 discloses a zoom lens with a half-angle of view of approximately 30° at the wide-angle end and a zoom ratio of approximately 45. However, the diameter of the second lens group that moves for zooming is large, which can be disadvantageous in terms of compactness. The present invention aims to provide a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance, for example. [Means for solving the problem]

[0006] One aspect of the present invention is a first lens group with positive refractive power that does not move for zooming, arranged in order from the object side to the image side, three or more intermediate lens groups that move during zooming, and a rear lens group with positive refractive power that does not move for zooming. Consists of It is a zoom lens, The spacing between adjacent lens groups changes during zooming. The three or more intermediate lens groups have a negative refractive power lens group V1 and a negative refractive power lens group V2 arranged in sequence from the object side to the image side, and both lens groups V1 and V2 move toward the image side such that the distance between lens group V1 and lens group V2 becomes shorter in the middle of the zoom range than at the wide-angle end. The first lens group includes, in order from the object side to the image side, a first sub-lens group that does not move for focusing, and a second sub-lens group with positive refractive power that moves toward the object side for focusing from infinity to the closest distance. mv1 is the amount of movement of lens group V1 from the wide-angle end to the telephoto end, mv2 is the amount of movement of lens group V2 from the wide-angle end to the telephoto end, f1 is the focal length of the first lens group, f1n is the combined focal length of one or more negative refractive power lenses in the first sub-lens group that are continuous from the object side, and fv is the combined focal length of lens group V1 and lens group V2 at the wide-angle end. Let v1r2 be the radius of curvature of the lens surface closest to the image in lens group V1, and v2r1 be the radius of curvature of the lens surface closest to the object in lens group V2. 0.60 <mv1 / mv2<1.20 -1.50 <f1n / f1<-0.80 -20.00 <f1 / fvw<-3.00 0.00<(v1r2+v2r1) / (v2r1-v1r2)<1.00 This zoom lens is characterized by satisfying the following conditions. [Effects of the Invention]

[0007] According to the present invention, for example, it is possible to provide a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. [Brief explanation of the drawing]

[0008] [Figure 1] Cross-sectional view of a zoom lens at the wide-angle end and infinity focus according to Example 1 [Figure 2] A diagram showing aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end. [Figure 3] Cross-sectional view of a zoom lens at the wide-angle end and infinity focus according to Example 2 [Figure 4] A diagram showing aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end. [Figure 5] Cross-sectional view of a zoom lens at the wide-angle end and infinity focus according to Example 3 [Figure 6] A diagram showing aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end. [Figure 7] Cross-sectional view of a zoom lens at the wide-angle end and infinity focus according to Example 4 [Figure 8] A diagram showing aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end. [Figure 9] Cross-sectional view of a zoom lens at the wide-angle end and infinity focus according to Example 5 [Figure 10] A diagram showing aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end. [Figure 11] Cross-sectional view of a zoom lens at the wide-angle end and infinity focus according to Example 6 [Figure 12] A diagram showing aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end. [Figure 13] Cross-sectional view of the zoom lens at the wide-angle end and infinity focus according to Example 7 [Figure 14] Diagram showing aberrations at infinity focus and (a) wide-angle end, (b) intermediate, or (c) telephoto end [Figure 15] Cross-sectional view of the zoom lens at the wide-angle end and infinity focus according to Example 8 [Figure 16] Diagram showing aberrations at infinity focus and (a) wide-angle end, (b) intermediate, or (c) telephoto end [Figure 17] Cross-sectional view of the zoom lens at the wide-angle end and infinity focus according to Example 9 [Figure 18] Diagram showing aberrations at infinity focus and (a) wide-angle end, (b) intermediate, or (c) telephoto end [Figure 19] Cross-sectional view of the zoom lens at the wide-angle end and infinity focus according to Example 10 [Figure 20] Diagram showing aberrations at infinity focus and (a) wide-angle end, (b) intermediate, or (c) telephoto end [Figure 21] Cross-sectional view of the zoom lens at the wide-angle end and infinity focus according to Example 11[[ID=​​​​​​​​​​​​​​​​​​Figure 1 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity, according to Example 1 described later. Example 1 corresponds to Numerical Example 1 described later. Figure 2 is a diagram showing the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end in Numerical Example 1 (refer to Numerical Example 1 for the respective focal lengths). In the diagram showing the aberrations, the straight line, dashed line, single dashed line, and dashed line in spherical aberration correspond to the d line (wavelength 587.6 nm), g line (wavelength 435.8 nm), C line (wavelength 656.3 nm), and F line (wavelength 486.1 nm), respectively. The dashed and solid lines in astigmatism correspond to the meridional image plane and sagittal image plane, respectively. Distortion corresponds to the e line. The solid line, dashed line, single dashed line, and dashed line in chromatic aberration correspond to the e line, g line, C line, and F line, respectively. Fno represents the F-number, and ω represents the half-angle of view. Spherical aberration is plotted with a full scale of ±0.400 mm on the horizontal axis. Astigmatism is plotted with a full scale of ±0.400 mm on the horizontal axis. Distortion is plotted with a full scale of ±10.000% on the horizontal axis. Lateral chromatic aberration is plotted with a full scale of ±0.100 mm on the horizontal axis.

[0011] Referring to Figure 1, the components of the zoom lens will be described in order from the object side to the image side. L1 is the first lens group with positive refractive power that does not move for zooming. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM consists of three or more intermediate lens groups that move during zooming, and comprises the first intermediate lens group M1 with negative refractive power, the second intermediate lens group M2 with negative refractive power, the third intermediate lens group M3 with negative refractive power, and the fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 has negative refractive power and moves monotonically along the optical axis toward the image for magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 has negative refractive power and moves monotonically toward the image such that the distance from the first intermediate lens group M1 becomes shorter at the midpoint of the zoom (between the wide-angle and telephoto ends) than at the wide-angle end. The third intermediate lens group M3 has negative refractive power and moves along the optical axis in a convex trajectory toward the object for magnification from the wide-angle end to the telephoto end. The fourth intermediate lens group M4 has positive refractive power and moves non-monotonically along the optical axis as illustrated for magnification from the wide-angle end to the telephoto end. SP is the aperture diaphragm, which does not move during magnification. LR is the rear lens group (relay lens group) with positive refractive power that does not move for magnification. I is the image plane of the zoom lens (the plane on which the image is formed), and the image sensor captures this image (performs imaging). In zoom lenses, the spacing between adjacent lens groups changes with each change in magnification.

[0012] The zoom lens according to this embodiment consists of, in order from the object side to the image side, a first lens group with positive refractive power that does not move for magnification, three or more intermediate lens groups that move for magnification, and a rear lens group with positive refractive power that does not move for magnification. In this zoom lens, the spacing between adjacent lens groups changes during magnification.

[0013] The three or more intermediate lens groups include a negative refractive power lens group V1 and a negative refractive power lens group V2, which are arranged in sequence from the object side to the image side. When zooming from the wide-angle end to the telephoto end, both lens groups V1 and V2 move towards the image side such that the distance between them becomes shorter at the midpoint of the zoom than at the wide-angle end.

[0014] The first lens group comprises a first sub-lens group that does not move for focusing, and a second sub-lens group with positive refractive power that moves toward the object for focusing from infinity to close focus. Let mv1 be the amount of movement of lens group V1 from the wide-angle end to the telephoto end, mv2 be the amount of movement of lens group V2 from the wide-angle end to the telephoto end, f1 be the focal length of the first lens group, and f1n be the combined focal length of the negative refractive power lens in the first sub-lens group that is closest to the object. Then, the zoom lens is 0.60 <mv1 / mv2<1.20···(1) -1.50 <f1n / f1<-0.80···(2) The following conditions are satisfied. Note that "amount of movement" here refers to the distance between the position at the wide-angle end and the position at the telephoto end (the same applies hereafter).

[0015] In this embodiment, lens group V1 (first intermediate lens group M1 with negative refractive power in Figure 1) and lens group V2 (second intermediate lens group M2 with negative refractive power in Figure 1) move such that the distance between them becomes shorter in the middle of the zoom range than at the wide-angle end. This prevents excessive fluctuations in coma aberration, field curvature, and distortion from the wide-angle end to the middle of the zoom range.

[0016] Here, we will explain the technical significance of equations (1) and (2). Note that "equation" is also called "conditional equation" or "condition". Equation (1) shows the conditions for obtaining a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, small size and light weight, and high optical performance. If the condition of equation (1) is not satisfied with respect to the upper limit, the amount of movement of lens group V1 becomes excessively large, so the distance between lens group V1 and lens group V2 at the wide-angle end becomes excessively large. In that case, the entrance pupil position of the zoom lens is positioned excessively towards the image side at the wide-angle end. As a result, the diameter of the first lens group increases excessively, and the zoom lens becomes excessively large. If the condition of equation (1) is not satisfied with respect to the lower limit, the amount of movement of lens group V1 becomes excessively small, so the lateral magnification of lens group V1 at the telephoto end becomes small, and in order to achieve a high zoom ratio, the amount of movement of lens groups V1 and V2 becomes excessively large. This results in an excessively thick optical axis for three or more intermediate lens groups, and the entrance pupil of the zoom lens being positioned excessively towards the image side. Consequently, the diameter of the first lens group increases excessively, and the zoom lens becomes excessively large.

[0017] Equation (2) shows the conditions for obtaining a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. If the conditions of equation (2) are not met with respect to the upper limit, the absolute value of f1n becomes excessively small, and the axial light beam to the second sub-lens group at the telephoto end becomes excessively large, making it difficult to correct spherical aberration at the telephoto end. Alternatively, f1 becomes excessively large, and the absolute value of the lateral magnification β of lens group V1 at the wide-angle end becomes small, and the amount of movement of lens group V1 for magnification becomes excessively large, making it difficult to obtain a compact and lightweight zoom lens. If the conditions of equation (2) are not met with respect to the lower limit, the absolute value of f1n becomes excessively large, and the principal point position of the first lens group is positioned excessively on the object side, so the diameter of the first lens group becomes excessively large, and the zoom lens becomes excessively large. Alternatively, f1 becomes excessively small, the magnification of the aberration in the first lens group at the telephoto end becomes excessively large, and the aberration at the telephoto end becomes excessively large.

[0018] Furthermore, the first lens group is not limited to the three sub-lens groups described above; for example, it may have multiple sub-lens groups that move for focusing, or it may have yet another sub-lens group.

[0019] In this embodiment, the zoom lens has a focal length of lens group V1 as fv1 and a focal length of lens group V2 as fv2. 0.00 <fv1 / fv2<0.80···(3) It is preferable to satisfy the following conditions. If the condition in equation (3) is not satisfied with respect to the upper limit, the refractive power of lens group V1 becomes excessively weak, causing the entrance pupil position of the zoom lens to be excessively positioned towards the image side at the wide-angle end, resulting in an excessively large diameter of the first lens group and an excessively large zoom lens. If the condition in equation (3) is not satisfied with respect to the lower limit, the refractive power of lens group V1 becomes excessively strong, causing excessively large fluctuations in aberrations during zooming.

[0020] The zoom lens according to this embodiment is 0.60 <mv1 / f1<1.20···(4) It is preferable to satisfy the following conditions. If the condition in equation (4) is not satisfied with respect to the upper limit, the amount of movement of lens group V1 for magnification becomes excessively large, the thickness of three or more intermediate lens groups on the optical axis becomes excessively large, and the entrance pupil of the zoom lens is positioned excessively towards the image side. As a result, the diameter of the first lens group becomes excessively large, and the zoom lens becomes excessively large. If the condition in equation (4) is not satisfied with respect to the lower limit, the amount of movement of lens group V1 becomes excessively small, and the refractive power of lens group V1 becomes excessively large. As a result, the variation in aberration during magnification becomes excessively large.

[0021] In this embodiment, the zoom lens has a combined focal length of lens groups V1 and V2 at the wide-angle end, where fvw is the combined focal length of V1 and V2. -20.00 <f1 / fvw<-2.00···(5) It is preferable to satisfy the following conditions. If the condition in equation (5) is not satisfied with respect to the upper limit, the absolute value of fvw becomes excessively large, the amount of movement of lens groups V1 and V2 becomes excessively large, and the zoom lens becomes excessively large. If the condition in equation (5) is not satisfied with respect to the lower limit, the absolute value of fvw becomes excessively small, and the variation in aberrations during magnification becomes excessively large.

[0022] In this embodiment, the zoom lens has a radius of curvature of the image-side lens surface of lens group V1 as V1r2, and a radius of curvature of the object-side lens surface of lens group V2 as V2r1. 0.00<(v1r2+v2r1) / (v2r1-v1r2)<1.00...(6) It is preferable to satisfy the following conditions. Equation (6) shows that lens group V1 and lens group V2 have their respective concave surfaces facing each other. In this way, the variation in aberration during magnification does not become excessively large.

[0023] The zoom lens according to this embodiment is -2.00 <v2r1 / f1<-0.05···(7) It is preferable to satisfy the following conditions. If the condition in equation (7) is not satisfied with respect to the upper limit, the radius of curvature of the lens surface closest to the object in lens group V2 becomes excessively small, and the variation in aberration during magnification becomes excessively large. If the condition in equation (7) is not satisfied with respect to the lower limit, the radius of curvature of the lens surface closest to the object in lens group V2 becomes excessively large, and the entrance pupil of the zoom lens is positioned excessively towards the image. As a result, the diameter of the first lens group becomes excessively large, and the zoom lens becomes excessively large.

[0024] In this embodiment, the zoom lens has an average Abbe number of the lenses with negative refractive power in lens group V1, where νdv1n is the average value of the Abbe numbers of the lenses with negative refractive power. 17.00<νdv1n<40.00···(8) It is preferable to satisfy the following conditions. If the condition in equation (8) is not satisfied with respect to the upper limit, the variation in lateral chromatic aberration during zooming will become excessively large. If the condition in equation (8) is not satisfied with respect to the lower limit, the axial chromatic aberration at the telephoto end will become excessively large. Note that the Abbe number νd is the Abbe number based on the d line, and the refractive indices for the F line (wavelength 486.1 nm), d line (wavelength 587.6 nm), and C line (wavelength 656.3 nm) are NF, Nd, and NC, respectively. νd = (Nd-1) / (NF-NC) It is defined by the following formula.

[0025] In this embodiment, the zoom lens has Ndv1n as the average value of the refractive index with respect to the d line of the lenses having negative refractive power in the lens group V1. 1.80 <Ndv1n<2.50···(9) It is preferable to satisfy the following conditions. If the condition in equation (9) is not satisfied with respect to the lower limit, Ndv1n becomes excessively small, the negative refractive power becomes excessively small, and the entrance pupil of the zoom lens is positioned excessively towards the image side. As a result, the diameter of the first lens group becomes excessively large, and the zoom lens becomes excessively large. Alternatively, the radius of curvature of the negative refractive power lens in lens group V1 becomes excessively small, and the variation in aberration during magnification becomes excessively large. If the condition in equation (9) is not satisfied with respect to the upper limit, Ndv1n becomes excessively large, making it difficult to select the glass material.

[0026] In this embodiment, the zoom lens has the average value of the Abbe numbers of the lenses with positive refractive power in lens group V2 as νdv2p. 17.00<νdv2p<35.00···(10) It is preferable to satisfy the following conditions. If the condition of equation (10) is not satisfied with respect to the upper limit, the axial chromatic aberration at the telephoto end will be excessively large. If the condition of equation (10) is not satisfied with respect to the lower limit, the variation in magnification chromatic aberration at magnification will be excessively large.

[0027] In this embodiment, the zoom lens has a focal length fw at the wide-angle end and a focal length ft at the telephoto end. 16.0 <ft / fw<160.0···(11) It is preferable to satisfy the following conditions. If the condition in equation (11) is not satisfied with respect to the lower limit, the zoom ratio will become excessively small. If the condition in equation (11) is not satisfied with respect to the upper limit, it will be difficult to obtain a zoom lens that is advantageous in terms of compactness, light weight, and high optical performance.

[0028] Here, let Z be the zoom ratio of the zoom lens, and the focal length fwm be: fwm = fw × Z 0.20 It is defined by the following formula. In this embodiment, the zoom lens has LDw as the distance between lens group V1 and lens group V2 at focal length fw, and LDwm as the distance between lens group V1 and lens group V2 at focal length fwm. 0.40 <LDwm / LDw<1.00···(12) It is preferable to satisfy the following conditions. If the condition in equation (12) is not satisfied with respect to the upper limit, the distortion aberration variation from focal length fw to focal length fwm becomes excessively large. If the condition in equation (12) is not satisfied with respect to the lower limit, the distance between lens group V1 and lens group V2 at the wide-angle end becomes excessively large. In that case, the entrance pupil of the zoom lens is positioned excessively towards the image at the wide-angle end. Then, the diameter of the first lens group becomes excessively large, and the zoom lens becomes excessively large.

[0029] In this embodiment, the zoom lens has a combined focal length of lens group V1 and lens group V2 that changes during zooming, with fvi being the combined focal length. 0.80 <fvi / fvw<1.20···(13) It is preferable that the following conditions be satisfied across the entire zoom range. If the conditions of equation (13) are not satisfied with respect to the upper and lower limits, the change in the combined focal length of lens group V1 and lens group V2 will become excessively large. In that case, the aberration fluctuations associated with the change in magnification will become excessively large.

[0030] In this embodiment, the zoom lens has a focal length fLDmin at which the distance between lens group V1 and lens group V2 is minimized. 0.03 <logZ (fLDmin / fw)<0.60···(14) It is preferable to satisfy the following conditions. If the conditions of equation (14) are not met with respect to the upper and lower limits, the distortion aberration in the middle of the zoom range will become excessively large. Furthermore, it is even more preferable that the zoom lens according to this embodiment satisfies the following conditions of equations (1a) to (14a). 0.80 <mv1 / mv2<1.15···(1a) -1.45 <f1n / f1<-0.85···(2a) 0.05 <fv1 / fv2<0.60···(3a) 0.70 <mv1 / f1<1.10···(4a) -15.00 <f1 / fvw<-3.00···(5a) 0.05<(v1r2+v2r1) / (v2r1-v1r2)<0.80···(6a) -1.50 <v2r1 / f1<-0.10···(7a) 23.00<νdv1n<37.50···(8a) 1.85 <Ndv1n<2.20···(9a) 18.50 < νv2p < 33.00 ···(10a) 18.00 <ft / fw<150.00···(11a) 0.50 <LDwm / LDw<0.90···(12a) 0.90 <fvi / fvw<1.10···(13a) 0.06 <log Z (fLDmin / fw)<0.50···(14a)

[0031] [Embodiment relating to an imaging device] Here, Figure 23 shows an example of the configuration of an imaging device. In Figure 23, 101 is a zoom lens from one of Examples 1 to 11. 124 is a camera (imaging unit; imaging device body). The zoom lens 101 is detachable from the camera 124. 125 is the imaging device configured by attaching the zoom lens 101 to the camera 124. The zoom lens 101 has a first lens group, three or more intermediate lens groups that move for magnification, and a rear lens group with positive refractive power that does not move for magnification. In Figure 23, the first lens group is referred to as lens group F, the three or more intermediate lens groups as group LZ, and the rear lens group as lens group R. As described above, the first lens group includes a sub-lens group that moves for focusing. Also in the same figure, SP is the aperture diaphragm. 114 and 115 are drive mechanisms, such as helicoids and cams, for driving the sub-lens group for focusing and the lens group LZ for zooming, respectively. Furthermore, 116 to 118 are motors (actuators) that drive the drive mechanisms 114 and 115 and the aperture diaphragm SP. 119 to 121 are detectors, including, for example, encoders, potentiometers, and photosensors, for detecting the position of the sub-lens group and lens group LZ for focusing, and the aperture diameter of the aperture diaphragm SP. In the camera 124, 109 is a glass block, including, for example, an optical filter, and 110 is an image sensor (photoelectric conversion element), including, for example, a CCD or CMOS device, for capturing (imaging) the subject image formed by the zoom lens 101. Furthermore, 111 and 122 are processing units, including, for example, a processor such as a CPU, that perform various processing and control in the camera 124 and the zoom lens 101, respectively. According to the imaging device of this embodiment, a useful imaging device can be provided that enjoys the advantageous effects of the zoom lens according to the above embodiment.

[0032] The following describes Examples 1 to 11 of the zoom lens according to the above-described embodiment, and Numerical Examples 1 to 11 corresponding to Examples 1 to 11.

[0033] [Example 1] In Figure 1, the configuration of the lens group and sub-lens group according to Example 1 is as described above. In the same figure, the first lens group L1 has the first to twelfth surfaces. The first sub-lens group 1a has the first to sixth surfaces and consists of one negative lens and two positive lenses. The second sub-lens group 1b has the seventh to tenth surfaces and consists of two positive lenses. The third sub-lens group 1c has the eleventh to twelfth surfaces and consists of one positive lens.

[0034] The three or more intermediate lens groups LM have surfaces 13 through 29. The first intermediate lens group M1 has surfaces 13 through 14 and consists of one negative lens with an aspherical surface facing the object. The second intermediate lens group M2 has surfaces 15 through 21 and consists of three negative lenses and two positive lenses. The third intermediate lens group M3 has surfaces 22 through 26 and consists of two negative lenses and one positive lens. The fourth intermediate lens group M4 has surfaces 27 through 29 and consists of one positive lens with an aspherical surface facing the object and one negative lens. The aperture diaphragm SP has surface 30. The rear lens group LR has surfaces 31 through 40 and consists of two negative lenses and four positive lenses. Figure 2 shows the aberrations in Example 1 as described above.

[0035] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when zoomed to f=12.64mm.

[0036] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0037] [Example 2] Figure 3 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity according to Embodiment 2. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, and a fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 moves monotonically toward the image during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image during the same magnification, such that the distance between it and intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves first toward the object side and then toward the image side during the same magnification. The fourth intermediate lens group M4 moves (for example, non-monotonically as shown in the figure) during the same magnification. SP is the aperture diaphragm and does not move for magnification. LR is the rear lens group with positive refractive power and does not move for magnification.

[0038] The first lens group L1 has the first to tenth surfaces. The first sub-lens group 1a has the first to sixth surfaces and consists of one negative lens and two positive lenses. The second sub-lens group 1b has the seventh to eighth surfaces and consists of one positive lens with an aspherical surface on the image side. The third sub-lens group 1c has the ninth to tenth surfaces and consists of one positive lens with an aspherical surface on the object side. Three or more intermediate lens groups LM have the eleventh to twenty-nine surfaces. The first intermediate lens group M1 has the eleventh to twelfth surfaces and consists of one negative lens with an aspherical surface on the object side. The second intermediate lens group M2 has the thirteenth to nineteenth surfaces and consists of three negative lenses and two positive lenses. The third intermediate lens group M3 has the twenty-fourth to twenty-fourth surfaces and consists of two negative lenses and one positive lens. The fourth intermediate lens group M4 has surfaces 25 through 29 and consists of one positive lens, one negative lens, and one positive lens, with the object-facing surface being aspherical. The aperture diaphragm SP has surface 30. The rear lens group LR has surfaces 31 through 40 and consists of two negative lenses and four positive lenses.

[0039] Figure 4 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 2 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0040] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when zoomed to f=11.97mm.

[0041] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0042] [Example 3] Figure 5 is a cross-sectional view of a zoom lens according to Embodiment 3 at the wide-angle end and focused at infinity. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the image side for focusing from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 does not move for focusing. The fourth sub-lens group 1d in the first lens group L1 moves towards the object side for focusing from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, and a fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 moves monotonically toward the image during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image during magnification from the wide-angle end to the telephoto end such that the distance between it and the first intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves first toward the object side and then toward the image side during the same magnification. The fourth intermediate lens group M4 moves (for example, non-monotonically as shown in the figure) during the same magnification. SP is the aperture diaphragm and does not move for magnification. LR is the rear lens group with positive refractive power and does not move for magnification.

[0043] The first lens group L1 has the first to eleventh surfaces. The first sub-lens group 1a has the first to second surfaces and consists of one negative lens with an aspherical image-side surface. The second sub-lens group 1b has the third to fifth surfaces and consists of one negative lens and one positive lens. The third sub-lens group 1c has the sixth to seventh surfaces and consists of one positive lens. The fourth sub-lens group 1d has the eighth to eleventh surfaces and consists of one positive lens with an aspherical image-side surface and one positive lens with an aspherical object-side surface. Three or more intermediate lens groups LM have the twelfth to twenty-fourth surfaces. The first intermediate lens group M1 has the twelfth to thirteenth surfaces and consists of one negative lens with an aspherical object-side surface. The second intermediate lens group M2 has the fourteenth to nineteenth surfaces and consists of two negative lenses and two positive lenses. The third intermediate lens group M3 has surfaces 20 to 22 and consists of one negative lens and one positive lens. The fourth intermediate lens group M4 has surfaces 23 to 24 and consists of one positive lens whose object-side surface is aspherical. The aperture diaphragm SP has surface 25. The rear lens group LR has surfaces 26 to 35 and consists of two negative lenses and four positive lenses.

[0044] Figure 6 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 3 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0045] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when zoomed to f=9.75mm.

[0046] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0047] [Example 4] Figure 7 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity according to Embodiment 4. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, and a fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 moves monotonically toward the image during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image during the same magnification, such that the distance between it and the first intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves first toward the object side and then toward the image side during the same magnification. The fourth intermediate lens group M4 moves (for example, non-monotonically as shown in the figure) during the same magnification. SP is the aperture diaphragm and does not move for magnification. LR is the rear lens group with positive refractive power and does not move for magnification.

[0048] The first lens group L1 has the first to thirteenth surfaces. The first sub-lens group 1a has the first to seventh surfaces and consists of two negative lenses and two positive lenses. The second sub-lens group 1b has the eighth to eleventh surfaces and consists of two positive lenses. The third sub-lens group 1c has the twelfth to thirteenth surfaces and consists of one positive lens. Three or more intermediate lens groups LM have the fourteenth to thirtyth surfaces. The first intermediate lens group M1 has the fourteenth to fifteenth surfaces and consists of one negative lens whose object-side surface is aspherical. The second intermediate lens group M2 has the fifteenth to twenty-second surfaces and consists of three negative lenses and two positive lenses. The third intermediate lens group M3 has the twenty-third to twenty-seventh surfaces and consists of two negative lenses and one positive lens. The fourth intermediate lens group M4 has surfaces 28 through 30 and consists of one positive lens and one negative lens, with the object-facing surface being aspherical. The aperture diaphragm SP has surface 31. The rear lens group LR has surfaces 32 through 41 and consists of two negative lenses and four positive lenses.

[0049] Figure 8 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 4 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0050] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when the zoom state is f = 12.25 mm.

[0051] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0052] [Example 5] Figure 9 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity according to Embodiment 5. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with positive refractive power, and a fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 moves monotonically toward the image side during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image side during the same magnification such that the distance between it and the first intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves (for example, non-monotonically as shown in the figure) during the same magnification. The fourth intermediate lens group M4 moves (for example, non-monotonically as shown in the figure) during the same magnification. SP is the aperture diaphragm and does not move for magnification. LR is the rear lens group with positive refractive power and does not move for magnification.

[0053] The first lens group L1 has the first to twelfth surfaces. The first sub-lens group 1a has the first to sixth surfaces and consists of one negative lens and two positive lenses. The second sub-lens group 1b has the seventh to tenth surfaces and consists of two positive lenses. The third sub-lens group 1c has the eleventh to twelfth surfaces and consists of one positive lens. Three or more intermediate lens groups LM have the thirteenth to thirty-tenth surfaces. The first intermediate lens group M1 has the thirteenth to fourteenth surfaces and consists of one negative lens whose object-side surface is aspherical. The second intermediate lens group M2 has the fifteenth to nineteenth surfaces and consists of two negative lenses and one positive lens. The third intermediate lens group M3 has the twenty-tenth to twenty-fifth surfaces and consists of one positive lens whose image-side surface is aspherical, one negative lens and one positive lens. The fourth intermediate lens group M4 has surfaces 26 through 30 and consists of one positive lens, one negative lens, and one positive lens, with the image-side surface being aspherical. The aperture diaphragm SP has surface 31. The rear lens group LR has surfaces 32 through 53 and consists of six negative lenses and seven positive lenses.

[0054] Figure 10 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 5 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0055] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when zoomed to f=26.30mm.

[0056] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0057] [Example 6] Figure 11 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity according to Embodiment 6. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification. LM consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, a fourth intermediate lens group M4 with positive refractive power, and a fifth intermediate lens group M5 with negative refractive power. The first intermediate lens group M1 moves monotonically toward the image side during zooming from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image side during the same zooming, such that the distance between it and the first intermediate lens group M1 becomes shorter at the midpoint of the zoom than at the wide-angle end. The third intermediate lens group M3 moves first toward the object side and then toward the image side during the same zooming. The fourth intermediate lens group M4 moves (for example, non-monotonically as shown in the figure) during the same zooming. The fifth intermediate lens group M5 moves (for example, non-monotonically as shown in the figure) during the same zooming. SP is the aperture diaphragm and does not move for zooming. LR is a group of rear lenses with positive refractive power that does not move for magnification.

[0058] The first lens group L1 has the first to tenth surfaces. The first sub-lens group 1a has the first to sixth surfaces and consists of one negative lens and two positive lenses. The second sub-lens group 1b has the seventh to eighth surfaces and consists of one positive lens with an aspherical surface on the image side. The third sub-lens group 1c has the ninth to tenth surfaces and consists of one positive lens with an aspherical surface on the object side. Three or more intermediate lens groups LM have the eleventh to twenty-nine surfaces. The first intermediate lens group M1 has the eleventh to twelfth surfaces and consists of one negative lens with an aspherical surface on the object side. The second intermediate lens group M2 has the thirteenth to nineteenth surfaces and consists of three negative lenses and two positive lenses. The third intermediate lens group M3 has the twenty-fourth surfaces and consists of two negative lenses and one positive lens. The fourth intermediate lens group M4 has surfaces 25 to 26 and consists of one positive lens with an aspherical surface on the object side. The fifth intermediate lens group M5 has surfaces 27 to 29 and consists of one negative lens and one positive lens. The aperture diaphragm SP has surface 30. The rear lens group LR has surfaces 31 to 40 and consists of two negative lenses and four positive lenses.

[0059] Figure 12 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 6 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0060] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when zoomed to f=12.17mm.

[0061] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0062] [Example 7] Figure 13 is a cross-sectional view of a zoom lens according to Embodiment 7 at the wide-angle end and focused at infinity. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, and a third intermediate lens group M3 with negative refractive power. The first intermediate lens group M1 moves monotonically towards the image side during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image side during the zoom change such that the distance between it and the first intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves first toward the object side and then toward the image side during the zoom change. SP is the aperture diaphragm and does not move for the zoom change. LR is the rear lens group with positive refractive power and does not move for the zoom change.

[0063] The first lens group L1 has the first to twelfth surfaces. The first sub-lens group 1a has the first to sixth surfaces and consists of one negative lens and two positive lenses. The second sub-lens group 1b has the seventh to tenth surfaces and consists of two positive lenses. The third sub-lens group 1c has the eleventh to twelfth surfaces and consists of one positive lens. Three or more intermediate lens groups LM have the thirteenth to twenty-sixth surfaces. The first intermediate lens group M1 has the thirteenth to fourteenth surfaces and consists of one negative lens whose object-side surface is aspherical. The second intermediate lens group M2 has the fifteenth to twenty-first surfaces and consists of three negative lenses and two positive lenses. The third intermediate lens group M3 has the twenty-second to twenty-sixth surfaces and consists of two negative lenses and one positive lens. The aperture diaphragm SP has the twenty-seventh surface. The rear lens group LR consists of one positive lens having surfaces 28 through 42 and with an aspherical surface on the object side, along with three negative lenses and five positive lenses.

[0064] Figure 14 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 7 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0065] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when zoomed to f=16.17mm.

[0066] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0067] [Example 8] Figure 15 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity according to Embodiment 8. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, and a fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 moves monotonically toward the image during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image during this magnification, such that the distance between it and the first intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves first toward the object and then toward the image during this magnification. The fourth intermediate lens group M4 moves along the optical axis (for example, non-monotonically as shown in the figure) during this magnification. SP is the aperture diaphragm and moves together with the fourth intermediate lens group M4 during this magnification. LR is the rear lens group with positive refractive power that does not move for the purpose of magnification.

[0068] The first lens group L1 has the first to twelfth surfaces. The first sub-lens group 1a has the first to sixth surfaces and consists of one negative lens and two positive lenses. The second sub-lens group 1b has the seventh to tenth surfaces and consists of two positive lenses. The third sub-lens group 1c has the eleventh to twelfth surfaces and consists of one positive lens. Three or more intermediate lens groups LM have the thirteenth to twenty-fifth surfaces. The first intermediate lens group M1 has the thirteenth to fourteenth surfaces and consists of one negative lens whose object-side surface is aspherical. The second intermediate lens group M2 has the fifteenth to twenty-fifth surfaces and consists of two negative lenses and two positive lenses. The third intermediate lens group M3 has the twenty-first to twenty-fifth surfaces and consists of two negative lenses and one positive lens. The aperture diaphragm SP has the twenty-sixth surface. The fourth intermediate lens group M4 has surfaces 27 through 29 and consists of one positive lens and one negative lens, with the object-side surface being aspherical. The rear lens group LR has surfaces 30 through 39 and consists of two negative lenses and four positive lenses.

[0069] Figure 16 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 8 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0070] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when the zoom state is f = 11.92 mm.

[0071] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0072] [Example 9] Figure 17 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity according to Embodiment 9. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object to focus from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 moves towards the object on a different trajectory than the second sub-lens group to focus from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, and a fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 moves monotonically toward the image during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image during the same magnification, such that the distance between it and the first intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves first toward the object side and then toward the image side during the same magnification. The fourth intermediate lens group M4 moves (for example, non-monotonically as shown in the figure) during the same magnification. SP is the aperture diaphragm and does not move for magnification. LR is the rear lens group with positive refractive power and does not move for magnification.

[0073] The first lens group L1 has the first to twelfth surfaces. The first sub-lens group 1a has the first to sixth surfaces and consists of one negative lens and two positive lenses. The second sub-lens group 1b has the seventh to tenth surfaces and consists of two positive lenses. The third sub-lens group 1c has the eleventh to twelfth surfaces and consists of one positive lens. Three or more intermediate lens groups LM have the thirteenth to thirtyth surfaces. The first intermediate lens group M1 has the thirteenth to seventeenth surfaces and consists of one negative lens, one negative lens, and one positive lens, with the object-side surface being aspherical. The second intermediate lens group M2 has the eighteenth to twenty-second surfaces and consists of two negative lenses and one positive lens. The third intermediate lens group M3 has the twenty-third to twenty-seventh surfaces and consists of two negative lenses and one positive lens. The fourth intermediate lens group M4 has surfaces 28 through 30 and consists of one positive lens and one negative lens, with the object-facing surface being aspherical. The aperture diaphragm SP has surface 31. The rear lens group LR has surfaces 32 through 41 and consists of two negative lenses and four positive lenses.

[0074] Figure 18 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 9 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0075] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when the zoom state is f = 210.00 mm.

[0076] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies equations (1) to (5) and equations (7) to (13), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0077] [Example 10] Figure 19 is a cross-sectional view of a zoom lens at the wide-angle end and focused at infinity according to Embodiment 10. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for zooming. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the image side for focusing from an object at infinity to a nearby object. The third sub-lens group 1c in the first lens group L1 does not move for focusing. The fourth sub-lens group 1d in the first lens group L1 moves towards the object side for focusing from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during zooming, and consists of a first intermediate lens group M1 with negative refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, and a fourth intermediate lens group M4 with positive refractive power. The first intermediate lens group M1 moves monotonically toward the image side during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image side during magnification from the wide-angle end to the telephoto end such that the distance between it and the first intermediate lens group M1 becomes shorter in the middle of the zoom range than at the wide-angle end. The third intermediate lens group M3 moves along the optical axis first toward the object side and then toward the image side during the same magnification. The fourth intermediate lens group M4 moves (for example, non-monotonically as shown in the figure) during the same magnification. SP is the aperture diaphragm and does not move for magnification. LR is the rear lens group with positive refractive power and does not move for magnification.

[0078] The first lens group L1 has the first to eleventh surfaces. The first sub-lens group 1a has the first to second surfaces and consists of one negative lens with an aspherical surface on the image side. The second sub-lens group 1b has the third to fifth surfaces and consists of one negative lens and one positive lens. The third sub-lens group 1c has the sixth to seventh surfaces and consists of one positive lens. The fourth sub-lens group 1d has the eighth to eleventh surfaces and consists of one positive lens with an aspherical surface on the image side and one positive lens with an aspherical surface on the object side. Three or more intermediate lens groups LM have the twelfth to twenty-fourth surfaces. The first intermediate lens group M1 has the twelfth to thirteenth surfaces and consists of one negative lens with an aspherical surface on the object side. The second intermediate lens group M2 has the fourteenth to nineteenth surfaces and consists of two negative lenses and two positive lenses. The third intermediate lens group M3 has surfaces 20 to 22 and consists of one negative lens and one positive lens. The fourth intermediate lens group M4 has surfaces 23 to 24 and consists of one positive lens whose object-side surface is aspherical. The aperture diaphragm SP has surface 25. The rear lens group LR has surfaces 26 to 35 and consists of two negative lenses and four positive lenses.

[0079] Figure 20 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 10 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0080] In this embodiment, lens group V1 is a first intermediate lens group M1 with negative refractive power, and lens group V2 is a second intermediate lens group M2 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when the zoom state is f = 22.14 mm.

[0081] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0082] [Example 11] Figure 21 is a cross-sectional view of a zoom lens according to Embodiment 11 at the wide-angle end and focused at infinity. Referring to this figure, the components of the zoom lens will be described in order from the object side to the image side. L1 is a first lens group with positive refractive power that does not move for magnification. The first sub-lens group 1a in the first lens group L1 does not move for focusing. The second sub-lens group 1b in the first lens group L1 moves towards the object side for focusing from an object at infinity to a nearby object. LM is a group of three or more intermediate lenses that move during magnification. LM consists of a first intermediate lens group M1 with positive refractive power, a second intermediate lens group M2 with negative refractive power, a third intermediate lens group M3 with negative refractive power, a fourth intermediate lens group M4 with negative refractive power, and a fifth intermediate lens group M5 with positive refractive power. The first intermediate lens group M1 moves monotonically towards the image side during magnification from the wide-angle end to the telephoto end. The second intermediate lens group M2 moves monotonically toward the image during the magnification. The third intermediate lens group M3 moves monotonically toward the image during the magnification such that the distance between it and the second intermediate lens group M2 becomes shorter in the middle of the zoom range than at the wide-angle end. The fourth intermediate lens group M4 moves first toward the object and then toward the image during the magnification. The fifth intermediate lens group M5 moves (for example, non-monotonically as shown in the figure) during the magnification. SP is the aperture diaphragm and does not move for the magnification. LR is the rear lens group with positive refractive power and does not move for the magnification.

[0083] The first lens group L1 has the first to eleventh surfaces. The first sub-lens group 1a has the first to seventh surfaces and consists of two negative lenses and two positive lenses. The second sub-lens group 1b has the eighth to eleventh surfaces and consists of two positive lenses. Three or more intermediate lens groups LM have the twelfth to thirtyth surfaces. The first intermediate lens group M1 has the twelfth to thirteenth surfaces and consists of one positive lens. The second intermediate lens group M2 has the fourteenth to fifteenth surfaces and consists of one negative lens whose object-side surface is aspherical. The third intermediate lens group M3 has the sixteenth to twenty-second surfaces and consists of three negative lenses and two positive lenses. The fourth intermediate lens group M4 has the twenty-third to twenty-seventh surfaces and consists of two negative lenses and one positive lens. The fifth intermediate lens group M5 has surfaces 28 through 30 and consists of one positive lens and one negative lens, with the object-facing surface being aspherical. The aperture diaphragm SP has surface 31. The rear lens group LR has surfaces 32 through 41 and consists of two negative lenses and four positive lenses.

[0084] Figure 22 shows the aberrations at infinity focus and at (a) the wide-angle end, (b) the intermediate end, or (c) the telephoto end (see Numerical Example 11 for the respective focal lengths). The legend is the same as that described with reference to Figure 2.

[0085] In this embodiment, lens group V1 is a second intermediate lens group M2 with negative refractive power, and lens group V2 is a third intermediate lens group M3 with negative refractive power, and the distance between lens group V1 and lens group V2 is minimized when zoomed to f=12.74mm.

[0086] The values ​​related to equations (1) to (14) in this embodiment are shown in Table 1. The values ​​of each variable included in equations (1) to (14) are shown in Table 2. This embodiment satisfies all of equations (1) to (14), thereby providing a zoom lens that is advantageous in terms of wide angle of view, high zoom ratio, compact size and light weight, and high optical performance. Here, the zoom lens is obtained by satisfying equations (1) and (2), and equations (3) to (14) do not necessarily have to be satisfied. Furthermore, if at least one of equations (3) to (14) is satisfied in addition to equations (1) and (2), a more significant effect can be achieved compared to the case where none of them are satisfied.

[0087] In Examples 1 to 11, the rear lens group was not moved, but the rear lens group or a part of it (sub-lens group) may be made to move. Even if this is done, the effects described above can be obtained, and such a modification is easy for those skilled in the art. For example, in Example 1, the portion of the rear lens group LR with surfaces 31 to 40 may be made to move. Since a generally afocal light beam is incident on surface 31 from the object side, even if this portion moves, the optical characteristics other than back focus will remain largely unchanged. Therefore, this movement can compensate for changes in focus associated with changes in the state of the zoom lens, such as zoom, focus, aperture diaphragm, temperature, atmospheric pressure, orientation, and insertion / removal of the variable magnification optical system.

[0088] Numerical examples are shown below. Details of the numerical values ​​in each numerical example are as follows. In each numerical example, r is the radius of curvature of each surface, d is the spacing between each surface, nd or Nd is the absolute refractive index at 1 atmosphere with respect to the d line of the Fraunhofer lines, and νd is the Abbe number with respect to the d line. The "half-angle of view" ω is expressed by the formula ω = arctan(Y / fw), where 2Y is the diagonal image size of the camera using the zoom lens and fw is the focal length of the zoom lens at the wide-angle end. The "maximum image height" corresponds to half of the diagonal image size 2Y (e.g., 11.00 mm), Y (e.g., 5.50 mm). BF is the back focus (air-equivalent length). The last three surfaces are the surfaces of a glass block such as a filter. With respect to the refractive indices of the F, d, and C lines of the Fraunhofer lines as NF, Nd, and NC, respectively, the Abbe number νd is defined in the same way as commonly used, i.e., it is expressed as follows. νd = (Nd-1) / (NF-NC)

[0089] The shape of an aspherical surface is expressed by taking the X-axis in the direction of the optical axis and the H-axis perpendicular to the direction of the optical axis, with the direction of light propagation being positive. R is the radius of paraxial curvature, k is the cone constant, and A3 to A16 are aspherical coefficients, respectively. The shape of the aspherical surface (amount of deviation from the reference sphere) is expressed by the following formula. Note that "eZ" is "×10 -Z This means "[...]". Additionally, the asterisk (*) to the right of the face number indicates that the face is aspherical.

[0090]

number

[0091] [Numerical Example 1] Unit: mm Surface data Face number rd nd vd 1 -154.581 1.50 1.76626 35.9 2 149.667 3.59 3 288.665 10.27 1.43387 95.1 4 -141.877 0.20 5 293.410 6.77 1.43387 95.1 6 -188.372 6.83 7 122.211 5.71 1.43387 95.1 8 1186.327 0.23 9 106.332 9.17 1.43387 95.1 10 -281.005 0.16 11 61.752 5.00 1.76385 48.5 12 96.470 (Variable) 13* 75.452 0.40 2.05090 26.9 14 13.348 (variable) 15 -29.400 0.40 1.95375 32.3 16 237.302 7.59 1.89286 20.4 17 -10.924 0.40 2.00100 29.1 18 -375.541 0.18 19 58.024 5.70 1.76182 26.5 20 -15.396 0.40 2.00100 29.1 21 -45.592 (variable) 22 -76.389 0.50 1.88300 40.8 23 56.911 3.99 1.85478 24.8 24 -84.310 1.32 25 -37.024 0.50 1.88300 40.8 26 -100.286 (variable) 27* 85.816 7.18 1.72916 54.7 28 -29.826 1.00 1.80810 22.8 29 -44.876 (variable) 30 (aperture) ∞ 40.00 31 76.629 4.95 1.80518 25.4 32 -99.730 1.14 33 343.817 0.70 1.88300 40.8 34 27.551 6.44 1.48749 70.2 35 -127.898 0.35 36 37.510 6.92 1.43875 94.7 37 -34.723 0.70 2.00100 29.1 38 244.959 1.17 39 225.732 6.19 1.49700 81.5 40 -35.670 4.00 41 ∞ 33.00 1.60859 46.4 42 ∞ 13.20 1.51633 64.1 43 ∞ 10.33 Image plane ∞ Aspherical data Page 13 K = 9.78799e-001 A 4= 1.78770e-005 A 6=-2.61464e-008 A 8=-2.23789e-010 A10= 2.09621e-011 A12=-3.80136e-013 A14= 2.80415e-015 A16=-7.48364e-018 Page 27 K =-1.89580e+000 A 4=-4.50538e-006 A 6= 3.88012e-009 A 8=-1.10334e-011 A10=2.79902e-014 A12=-3.00628e-017 Various data Zoom ratio 28.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.50 39.69 210.00 14.60 12.64 210.00 F-number 1.80 1.80 3.40 1.80 1.80 3.40 Field of view 36.25 7.89 1.50 20.64 23.52 1.50 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 279.24 279.24 279.24 279.24 279.24 279.24 BF 10.33 10.33 10.33 10.33 10.33 10.33 d12 0.68 41.87 56.97 19.26 15.31 56.97 d14 6.17 4.43 7.53 4.50 4.38 7.53 d21 61.10 4.46 2.55 26.33 32.88 2.55 d26 1.98 13.75 0.17 8.73 7.25 0.17 d29 1.23 6.63 3.93 12.33 11.34 3.93 Zoom lens group data Group starting plane focal length 1 1 71.12 2 13 -15.48 3 15 -56.77 4 22 -58.56 5 27 43.00 6 30 57.18

[0092] [Numerical Example 2] Unit: mm Surface data Face number rd nd vd 1 -137.235 1.50 1.76626 35.9 2 97.309 1.33 3 97.805 14.09 1.43387 95.1 4 -127.009 0.20 5 1172.593 6.00 1.43387 95.1 6 -151.549 6.82 7 107.067 10.14 1.43875 94.7 8* -505.442 0.22 9* 68.411 9.37 1.76385 48.5 10 357.525 (variable) 11* 49.780 0.40 2.05090 26.9 12 12.555 (variable) 13 -26.290 0.40 1.76385 48.5 14 840.984 5.87 1.89286 20.4 15 -11.108 0.40 2.00100 29.1 16 -550.371 0.18 17 50.537 4.50 1.75520 27.5 18 -19.535 0.40 2.00100 29.1 19 -64.699 (variable) 20 -58.017 0.50 1.89190 37.1 21 66.144 3.98 1.84666 23.8 22 -63.839 1.62 23 -36.994 0.50 1.88300 40.8 24 -91.435 (variable) 25* 167.721 5.78 1.72916 54.7 26 -38.993 0.20 27 38.021 6.26 1.48749 70.2 28 385.255 0.60 1.85478 24.8 29 59.776 (Variable) 30 (aperture) ∞ 40.00 31 54.566 5.21 1.68948 31.0 32 -87.151 5.47 33 -78.206 0.70 1.88300 40.8 34 28.035 6.63 1.51742 52.4 35 -43.641 0.35 36 68.689 5.04 1.43875 94.7 37 -31.387 0.70 2.00100 29.1 38 -446.456 0.69 39 59.167 4.95 1.49700 81.5 40 -40.820 4.00 41 ∞ 33.00 1.60859 46.4 42 ∞ 13.20 1.51633 64.1 43 ∞ 7.40 Image plane ∞ Aspherical data Side 8 K = 0.00000e+000 A 4=-3.27848e-007 A 6= 1.41264e-010 A 8=-7.57937e-014 A10 = 1.57531e-017 9th page K = 0.00000e+000 A 4=-2.60556e-007 A 6= 4.13535e-011 A 8=-4.34344e-014 Page 11 K =-1.19219e+000 A 4= 1.78856e-005 A 6=-1.15368e-007 A 8= 2.22039e-009 A10=-1.90825e-011 A12= 3.76498e-014 A14= 3.46056e-016 A16=-1.45185e-018 Page 25 K =-2.00000e+000 A 4=-4.11550e-006 A 6= 3.23130e-009 A 8=-1.05747e-011 A10=2.92384e-014 A12=-3.19760e-017 Various data Zoom ratio 29.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.30 39.31 211.70 14.32 11.97 211.70 F-number 1.80 1.80 3.42 1.80 1.79 3.42 Field of view 36.99 7.96 1.49 21.02 24.67 1.49 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 285.53 285.53 285.53 285.53 285.53 285.53 BF 7.40 7.40 7.40 7.40 7.40 7.40 d10 0.69 41.70 56.53 19.41 14.65 56.53 d12 7.41 6.28 9.57 6.26 6.19 9.57 d19 62.65 4.48 2.46 26.94 35.01 2.46 d24 2.27 14.69 0.49 9.29 7.42 0.49 d29 3.92 9.78 7.88 15.05 13.67 7.88 Zoom lens group data Group starting plane focal length 1 1 69.31 2 11 -16.07 3 13 -57.18 4 20 -58.73 5 25 40.96 6 30 54.00

[0093] [Numerical Example 3] Unit: mm Surface data Face number rd nd vd 1 18257.860 3.00 1.83481 42.7 2* 74.999 6.54 3 183.134 2.30 1.85478 24.8 4 96.518 10.43 1.43875 94.7 5 -365.680 6.06 6 112.806 13.31 1.43387 95.1 7 -137.915 5.12 8 135.461 7.34 1.43875 94.7 9* 435.912 1.46 10* 75.494 8.92 1.76385 48.5 11 14301.742 (variable) 12* 443.721 0.80 2.05090 26.9 13 15.841 (variable) 14 -72.728 4.72 1.89286 20.4 15 -13.423 0.60 2.00100 29.1 16 764.207 0.18 17 52.905 4.63 1.84666 23.8 18 -21.815 0.60 2.00100 29.1 19 -198.684 (variable) 20 -39.712 0.75 1.72916 54.7 21 100.108 2.25 1.84666 23.8 22 -703.910 (variable) 23* 68.927 5.13 1.75497 47.8 24 -62.212 (variable) 25 (aperture) ∞ 40.00 26 174.251 4.17 1.53737 75.8 27 -106.595 1.83 28 89.683 1.00 1.88300 40.8 29 31.997 5.91 1.43875 94.7 30 -76.206 0.35 31 33.864 7.52 1.43875 94.7 32 -35.720 1.00 2.00100 29.1 33 -1686.858 2.06 34 -146.999 4.58 1.62004 36.3 35 -36.943 4.00 36 ∞ 33.00 1.60859 46.4 37 ∞ 13.20 1.51633 64.1 38 ∞ 7.40 Image plane ∞ Aspherical data 2nd side K = 0.00000e+000 A 4=-1.67680e-007 A 6= 1.10172e-010 A 8= 5.09011e-014 A10 = -1.68348e-017 9th page K = 0.00000e+000 A 4=-9.19730e-007 A 6= 1.01777e-009 A 8=-3.26056e-012 A10= 3.73046e-015 A12=-2.25709e-018 A14= 7.26975e-022 A16=-9.85851e-026 Side 10 K = 0.00000e+000 A 4=-6.19865e-007 A 6= 5.68200e-010 A 8=-1.85582e-012 A10= 1.99580e-015 A12=-1.16238e-018 A14= 3.63939e-022 A16=-4.97365e-026 Side 12 K = 2.00000e+000 A 4= 1.72756e-005 A 6=-5.13069e-008 A 8= 9.58148e-010 A10=-1.15543e-011 A12= 6.08957e-014 A14=-1.05722e-016 A16=-7.14981e-020 Page 23 K =-7.12514e-001 A 4=-3.62710e-006 A 6= 4.11926e-009 A 8=-2.24544e-011 A10=8.68530e-014 A12=-1.28667e-016 Various data Zoom ratio 25.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.00 32.98 175.00 12.98 9.75 175.00 F-number 1.80 1.80 3.10 1.80 1.80 3.10 Field of view: 38.16 9.47 1.80 22.96 29.44 1.80 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 295.00 295.00 295.00 295.00 295.00 295.00 BF 7.40 7.40 7.40 7.40 7.40 7.40 d11 0.73 45.25 63.22 22.11 12.61 63.22 d13 6.61 6.37 15.12 5.76 5.24 15.12 d19 60.41 6.18 3.93 30.90 43.77 3.93 d22 4.26 16.37 0.36 10.35 7.55 0.36 d24 12.83 10.67 2.20 15.72 15.68 2.20 Zoom lens group data Group starting plane focal length 1 1 68.43 2 12 -15.65 3 14 -134.96 4 20 -62.73 5 23 44.05 6 25 51.90

[0094] [Numerical Example 4] Unit: mm Surface data Face number rd nd vd 1 -169.859 2.40 1.67300 38.3 2 153.279 3.17 3 364.985 2.40 1.61340 44.3 4 115.522 10.74 1.43875 94.9 5 -197.902 0.32 6 211.170 7.74 1.43387 95.1 7 -190.945 6.91 8 113.537 6.37 1.43387 95.1 9 2021.200 0.23 10 108.638 8.23 ​​1.43387 95.1 11 -395.875 0.16 12 65.666 5.11 1.76385 48.5 13 108.649 (variable) 14* 76.655 0.40 2.05090 26.9 15 13.106 (variable) 16 -26.737 0.40 1.95375 32.3 17 38.386 6.63 1.89286 20.4 18 -10.218 0.40 2.00100 29.1 19 -159.093 0.18 20 61.307 5.06 1.69895 30.1 21 -15.839 0.40 2.00100 29.1 22 -36.042 (variable) 23 -74.085 0.50 1.88300 40.8 24 66.035 4.13 1.85478 24.8 25 -79.902 1.94 26 -36.118 0.50 1.88300 40.8 27 -88.000 (Variable) 28* 97.233 7.94 1.72916 54.7 29 -29.158 1.00 1.80810 22.8 30 -44.052 (variable) 31 (aperture) ∞ 40.00 32 76.301 4.98 1.80518 25.4 33 -103.706 1.38 34 267.256 0.70 1.88300 40.8 35 27.664 6.69 1.48749 70.2 36 -146.338 0.35 37 41.713 9.02 1.43875 94.7 38 -31.218 0.70 2.00100 29.1 39 156.833 0.97 40 108.353 6.68 1.51823 58.9 41 -33.060 4.00 42 ∞ 33.00 1.60859 46.4 43 ∞ 13.20 1.51633 64.1 44 ∞ 10.70 Image plane ∞ Aspherical data Page 14 K = 1.99951e+000 A 4= 1.97083e-005 A 6=-7.02188e-009 A 8=-1.21149e-009 A10= 3.47862e-011 A12=-4.56441e-013 A14= 2.90121e-015 A16=-7.16692e-018 Page 28 K =-5.86143e-001 A 4=-4.46167e-006 A 6= 3.14059e-009 A 8=-7.30390e-012 A10= 1.55974e-014 A12=-1.40731e-017 Various data Zoom ratio 28.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.50 39.69 210.00 14.60 12.25 210.00 F-number 1.80 1.80 3.40 1.80 1.80 3.40 Field of view 36.25 7.89 1.50 20.64 24.17 1.50 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 287.54 287.54 287.54 287.54 287.54 287.54 BF 10.70 10.70 10.70 10.70 10.70 10.70 d13 0.65 42.07 57.25 19.72 14.80 57.25 d15 6.64 5.22 7.20 5.34 5.13 7.20 d22 62.78 3.99 3.70 27.25 35.37 3.70 d27 1.12 14.08 0.09 8.28 6.39 0.09 d30 0.70 6.53 3.65 11.32 10.20 3.65 Zoom lens group data Group starting plane focal length 1 1 70.83 2 14 -15.09 3 16 -56.11 4 23 -61.95 5 28 44.35 6 31 59.46

[0095] [Numerical Example 5] Unit: mm Surface data Face number rd nd vd 1 -1643.406 6.00 1.83481 42.7 2 364.840 1.80 3 365.772 23.98 1.43387 95.1 4 -786.435 0.20 5 661.790 13.27 1.43387 95.1 6 -1303.165 24.64 7 371.145 16.72 1.43387 95.1 8 -4093.551 0.25 9 280.972 17.24 1.43387 95.1 10 2778.030 1.50 11 197.654 14.45 1.43875 94.7 12 433.574 (variable) 13* -355.947 2.20 2.00330 28.3 14 33.425 (Variable) 15 -40.717 1.45 1.74320 49.3 16 68.041 9.03 1.89286 20.4 17 -47.612 2.07 18 -41.969 2.00 1.88300 40.8 19 -94.746 (variable) 20 165.327 9.23 1.72916 54.7 21* -436.473 7.96 22 128.655 15.38 1.43875 94.7 23 -170.694 0.48 24 158.962 2.60 1.85478 24.8 25 85.014 (Variable) 26 76.038 15.10 1.49700 81.5 27 -284.563 0.50 28 1658.705 2.50 1.80518 25.4 29 139.161 8.74 1.60311 60.6 30* -300.294 (variable) 31 (aperture) ∞ 5.21 32 -125.754 1.40 1.88300 40.8 33 47.712 0.84 34 38.542 3.49 1.92286 18.9 35 77.832 5.47 36 -47.934 1.70 1.80400 46.5 37 -54.323 7.29 38 -536.122 1.50 1.80400 46.5 39 30.686 5.06 1.84666 23.9 40 342.963 3.57 41 -54.251 1.50 1.89190 37.1 42 52.127 11.92 1.51633 64.1 43 -30.318 9.53 44 103.128 5.00 1.51742 52.4 45 -67.872 1.40 46 -58.017 1.50 1.88300 40.8 47 31.653 8.41 1.48749 70.2 48 -61.406 0.20 49 125.595 8.00 1.51742 52.4 50 -30.991 1.50 1.88300 40.8 51 -71.723 0.20 52 114.771 7.37 1.53996 59.5 53 -39.171 10.00 54 ∞ 33.00 1.60859 46.4 55 ∞ 13.20 1.51633 64.2 56 ∞ 13.28 Image plane ∞ Aspherical data Page 13 K =-1.99998e+000 A 4= 2.29510e-006 A 6=-2.22030e-008 A 8=-3.07041e-010 A10= 8.65358e-013 A12= 3.19584e-015 A14= 1.28104e-018 A16= 5.75375e-022 A 3=-4.19902e-007 A 5= 4.45439e-008 A 7= 3.72274e-009 A 9= 7.02289e-012 A11=-8.37698e-014 A13=-6.44846e-017 A15=-3.88745e-020 Page 21 K = 3.81802e+001 A 4= 2.72744e-007 A 6=-4.84904e-011 A 8= 1.59672e-016 A10= 8.21796e-017 A12=-7.64436e-020 A14= 1.82972e-023 A16=-6.50501e-027 A 3=-1.03558e-008 A 5= 1.20951e-009 A 7= 9.20553e-013 A 9=-1.57888e-015 A11= 4.75412e-019 A13= 2.74004e-022 A15= 2.10260e-025 Page 30 K =-6.81917e+001 A 4= 1.45684e-007 A 6= 4.41026e-010 A 8= 1.24160e-013 A10=-4.71323e-016 A12= 3.09226e-019 A14=-2.17996e-022 A16= 4.30501e-026 A 3=-6.95843e-008 A 5=-3.16577e-009 A 7=-1.53009e-011 A 9= 1.27411e-014 A11=-1.67043e-018 A13= 1.87266e-021 A15= 3.32729e-025 Various data Zoom ratio 119.99 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 8.00 87.64 960.00 20.84 26.30 8.00 F number 1.75 1.75 5.29 1.75 1.75 1.75 Field of view 34.51 3.59 0.33 14.78 11.81 34.51 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 677.55 677.55 677.55 677.55 677.55 677.55 BF 13.28 13.28 13.28 13.28 13.28 13.28 d12 3.52 158.86 199.05 76.18 91.51 3.52 d14 14.28 13.65 13.23 12.44 12.36 14.28 d19 291.97 103.93 2.01 188.80 168.51 291.97 d25 3.99 9.49 12.54 29.57 31.21 3.99 d30 2.97 30.78 89.88 9.72 13.13 2.97 Zoom lens group data Group starting plane focal length 1 1 251.71 2 13 -30.37 3 15 -124.17 4 20 129.76 5 26 110.50 6 31 39.10

[0096] 〔Numerical Example 6〕 Unit: mm Surface data Surface number r d nd vd[[ID=​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​22 -64.856 1.59 23 -37.474 0.50 1.88300 40.8 24 -91.172 (variable) 25* 172.030 5.36 1.88300 40.8 26 -45.001 (variable) 27 43.355 5.30 1.59410 60.5 28 -99.185 0.60 2.05090 26.9 29 89.563 (Variable) 30 (aperture) ∞ 40.00 31 58.705 4.99 1.67270 32.1 32 -74.690 1.35 33 -214.583 0.70 1.88300 40.8 34 32.487 6.11 1.54814 45.8 35 -67.865 0.35 36 39.970 5.87 1.43875 94.7 37 -36.044 0.70 2.00100 29.1 38 123.783 0.84 39 58.251 4.05 1.49700 81.5 40 -54.380 4.00 41 ∞ 33.00 1.60859 46.4 42 ∞ 13.20 1.51633 64.1 43 ∞ 7.40 Image plane ∞ Aspherical data Side 8 K = 0.00000e+000 A 4=-3.30960e-007 A 6= 1.24281e-010 A 8=-6.92483e-014 A10 = 1.43318e-017 9th page K = 0.00000e+000 A 4=-2.54646e-007 A 6= 3.53481e-011 A 8=-4.07841e-014 The 11th surface K =-2.37628e-001 A 4= 1.78057e-005 A 6=-1.20196e-007 A 8= 2.39218e-009 A10=-2.32208e-011 A12= 8.33617e-014 A14= 1.08203e-016 A16=-9.74734e-019 The 25th surface K =-2.00016e+000 A 4=-2.49999e-006 A 6= 2.14902e-009 A 8=-9.40753e-012 A10= 2.74523e-014 A12=-3.09597e-017 Various data Zoom ratio 29.00 Wide-angle Middle Telephoto fwm fLDmin fLDmax Focal length 7.30 39.31 211.70 14.32 12.17 211.70 F-number 1.80 1.80 3.41 1.80 1.80 3.41 Angle of view 36.99 7.9! 1.49 21.02 !4.31 1.49 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Overall lens length 281.19 281.19 281.19 281.19 2&1.19 281.19$ BF 7.40 7.40 7.40 7.40 7!40 7.40 d10 0.70 42.10 56.89 19.63 15. !1 56.8! d12 7.40 6.31 10.14 6.30 6.24 10.14 d19 62.45 4.70 2.30 !7.19 34.44 2.30 d24 2.94 15.02 0.50 9.78 8.12 0.50 d26 1.19 1.20 4.05 3.33 3.02 4.05 d29 3.72 9.07 4.52 12.18 11.27 4.52 Zoom lens group data Group starting plane focal length 1 1 69.57 2 11 -16.02 3 13 -61.04 4 20 -58.84 5 25 40.87 6 27 -537.78 7 30 53.58

[0097] [Numerical Example 7] Unit: mm Surface data Face number rd nd vd 1 -137.780 1.50 1.74951 35.3 2 137.849 4.84 3 210.303 13.82 1.43387 95.1 4 -124.916 0.20 5 439.255 7.21 1.43387 95.1 6 -202.488 6.35 7 133.757 7.47 1.43387 95.1 8 -1725.613 0.23 9 110.233 10.37 1.43387 95.1 10 -247.918 0.14 11 57.797 5.47 1.76385 48.5 12 87.390 (Variable) 13* 73.000 0.40 2.00069 25.5 14 14.831 (variable) 15 -21.320 0.40 1.95375 32.3 16 29.220 7.82 1.89286 20.4 17 -11.803 0.40 2.00100 29.1 18 -194.225 0.18 19 85.370 5.63 1.69895 30.1 20 -13.813 0.40 2.00100 29.1 21 -27.399 (variable) 22 -51.804 0.50 1.88300 40.8 23 45.291 3.57 1.85478 24.8 24 -75.218 1.15 25 -37.166 0.50 1.83481 42.7 26 -103.618 (variable) 27 (aperture) ∞ 1.46 28* 860.888 6.33 1.74400 44.8 29 -34.359 0.27 30 35.946 7.20 1.51742 52.4 31 -103.068 1.00 2.00069 25.5 32 86.237 40.00 33 72.230 5.23 1.76182 26.5 34 -77.629 1.25 35 -6442.707 0.70 1.88300 40.8 36 31.588 6.85 1.48749 70.2 37 -81.116 0.35 38 39.658 7.36 1.43875 94.7 39 -32.410 0.70 2.00100 29.1 40 138.580 1.30 41 130.575 5.09 1.51633 64.1 42 -37.145 4.00 43 ∞ 33.00 1.60859 46.4 44 ∞ 13.20 1.51633 64.1 45 ∞ 8.13 Image plane ∞ Aspherical data Page 13 K =-1.58954e-001 A 4= 1.56966e-005 A 6= 3.84423e-008 A 8=-1.58582e-009 A10= 3.18380e-011 A12=-3.13743e-013 A14= 1.51027e-015 A16=-2.83137e-018 Page 28 K = 3.22790e-002 A 4=-3.91934e-006 A 6= 2.00122e-009 A 8=-6.07447e-012 A10= 1.35380e-014 A12=-1.62823e-017 Various data Zoom ratio 25.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.60 38.00 190.00 14.47 16.17 7.60 F-number 1.80 1.80 3.00 1.80 1.80 1.80 Field of view 35.89 8.24 1.66 20.81 18.78 35.89 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 290.00 290.00 290.00 290.00 290.00 290.00 BF 8.13 8.13 8.13 8.13 8.13 8.13 d12 0.71 39.80 53.40 20.54 23.37 0.71 d14 8.57 6.39 7.00 5.97 5.90 8.57 d21 51.21 8.38 6.47 31.17 27.93 51.21 d26 7.55 13.47 1.16 10.35 10.84 7.55 Zoom lens group data Group starting plane focal length 1 1 66.83 2 13 -18.66 3 15 -47.41 4 22 -47.94 5 27 55.32

[0098] [Numerical Example 8] Unit: mm Surface data Face number rd nd vd 1 -153.242 1.50 1.76626 35.9 2 155.779 3.29 3 330.677 9.37 1.43387 95.1 4 -141.505 0.20 5 294.000 7.02 1.43387 95.1 6 -183.114 7.54 7 116.787 6.05 1.43387 95.1 8 1106.327 0.23 9 106.641 8.73 1.43387 95.1 10 -308.029 0.25 11 63.855 4.76 1.76385 48.5 12 98.507 (Variable) 13* 80.757 0.40 1.90525 35.0 14 12.412 (variable) 15 -26.614 0.40 2.05090 26.9 16 35.694 7.06 1.89286 20.4 17 -10.619 0.40 2.00100 29.1 18 -75.289 0.18 19 60.155 2.63 1.58144 40.8 20 -72.910 (variable) 21 -156.186 0.50 1.80400 46.5 22 47.279 3.26 1.85478 24.8 23 -205.285 2.07 24 -36.148 0.50 1.88300 40.8 25 -135.981 (variable) 26 (aperture) ∞ 0.71 27* 85.285 7.93 1.72916 54.7 28 -27.961 1.00 1.77830 23.9 29 -43.988 (variable) 30 63.716 5.51 1.74077 27.8 31 -95.591 1.17 32 1215.093 0.70 1.88300 40.8 33 27.056 6.96 1.51823 58.9 34 -102.726 0.35 35 38.731 7.63 1.43875 94.7 36 -30.255 0.70 2.00100 29.1 37 96.378 1.42 38 75.446 7.87 1.54814 45.8 39 -33.087 4.00 40 ∞ 33.00 1.60859 46.4 41 ∞ 13.20 1.51633 64.1 42 ∞ 9.27 Image plane ∞ Aspherical data Page 13 K =-1.99535e+000 A 4= 1.95844e-005 A 6= 9.27853e-010 A 8=-1.97996e-009 A10= 4.82295e-011 A12=-5.67037e-013 A14= 3.23156e-015 A16=-7.12444e-018 Page 27 K =-1.40972e+000 A 4=-4.69936e-006 A 6= 4.97113e-009 A 8=-2.10146e-011 A10=6.87335e-014 A12=-8.82671e-017 Various data Zoom ratio 28.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.50 39.69 210.00 14.60 11.92 210.00 F-number 1.80 1.80 3.40 1.80 1.80 3.40 Field of view 36.25 7.89 1.50 20.64 24.76 1.50 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 283.68 283.68 283.68 283.68 283.68 283.68 BF 9.27 9.27 9.27 9.27 9.27 9.27 d12 0.69 43.07 58.60 19.78 14.01 58.60 d14 6.60 5.85 9.06 5.47 5.23 9.06 d20 63.18 4.80 3.39 27.36 36.79 3.39 d25 2.23 13.31 0.66 8.52 6.61 0.66 d29 43.21 48.88 44.20 54.77 53.28 44.20 Zoom lens group data Group starting plane focal length 1 1 73.33 2 13 -16.25 3 15 -53.24 4 21 -55.82 5 26 42.03 6 30 57.31

[0099] [Numerical Example 9] Unit: mm Surface data Face number rd nd vd 1 -159.435 1.50 1.86130 35.5 2 142.502 5.78 3 298.335 10.40 1.43387 95.1 4 -146.167 0.20 5 229.256 9.22 1.43387 95.1 6 -152.288 7.03 7 145.135 5.88 1.43387 95.1 8 5293.970 0.23 9 126.723 9.73 1.43387 95.1 10 -210.107 0.19 11 62.575 5.20 1.76385 48.5 12 97.116 (Variable) 13* 108.839 0.40 2.05090 26.9 14 18.353 6.70 15 -23.071 0.40 2.05090 26.9 16 212.733 5.09 1.80810 22.8 17 -22.480 (variable) 18 -19.993 0.40 1.80440 39.6 19 25.043 4.74 1.89286 20.4 20 -22.872 1.27 21 -16.621 0.40 2.05090 26.9 22 -28.949 (variable) 23 -84.622 0.50 1.88300 40.8 24 63.368 3.55 1.85478 24.8 25 -87.255 1.78 26 -42.193 0.50 1.88300 40.8 27 -108.426 (variable) 28* 67.110 7.69 1.64000 60.1 29 -29.744 1.00 1.80810 22.8 30 -42.116 (variable) 31 (aperture) ∞ 40.00 32 44.473 5.37 1.72825 28.5 33 -148.686 0.97 34 103.931 0.70 1.88300 40.8 35 22.443 6.74 1.51742 52.4 36 -150.630 0.04 37 33.468 6.59 1.43875 94.7 38 -27.127 0.70 2.00100 29.1 39 51.137 5.54 40 80.785 7.49 1.51823 58.9 41 -26.566 4.00 42 ∞ 33.00 1.60859 46.4 43 ∞ 13.20 1.51633 64.1 44 ∞ 7.39 Image plane ∞ Aspherical data Page 13 K =-1.99878e+000 A 4= 1.61614e-005 A 6=-9.95950e-009 A 8=-1.71289e-011 A10= 6.89789e-012 A12=-1.10723e-013 A14= 6.81849e-016 A16=-1.48211e-018 Page 28 K = 4.73757e-001 A 4=-5.25065e-006 A 6= 3.80763e-009 A 8=-1.45902e-011 A10=5.01242e-014 A12=-6.72348e-017 Various data Zoom ratio 28.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.50 39.69 210.00 14.60 210.00 7.50 F-number 1.80 1.80 3.40 1.80 3.40 1.80 Field of view 36.25 7.89 1.50 20.64 1.50 36.25 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 290.01 290.01 290.01 290.01 290.01 290.01 BF 7.39 7.39 7.39 7.39 7.39 7.39 d12 0.88 43.52 58.84 20.46 58.84 0.88 d17 6.52 0.98 0.96 4.17 0.96 6.52 d22 53.78 1.79 1.00 19.72 1.00 53.78 d27 0.59 15.68 0.47 9.88 0.47 0.59 d30 6.70 6.52 7.21 14.26 7.21 6.70 Zoom lens group data Group starting plane focal length 1 1 70.79 2 13 -20.05 3 18 -44.09 4 23 -71.89 5 28 44.60 6 31 57.32

[0100] [Numerical Example 10] Unit: mm Surface data Face number rd nd vd 1 1661.096 3.00 1.83481 42.7 2* 54.402 10.21 3 181.057 2.30 1.85478 24.8 4 86.460 11.19 1.43875 94.7 5 -186.023 3.57 6 98.453 12.15 1.43387 95.1 7 -133.021 3.67 8 99.530 8.01 1.43875 94.7 9* 288.609 1.44 10* 80.577 7.07 1.76385 48.5 11 -464.312 (variable) 12* 137.602 0.80 1.95375 32.3 13 13.769 (variable) 14 -39.498 6.07 1.89286 20.4 15 -11.301 0.60 1.95375 32.3 16 1156.945 0.18 17 51.070 5.05 1.80219 41.4 18 -21.122 0.60 1.88300 40.8 19 -79.083 (variable) 20 -36.269 0.75 1.72916 54.7 21 77.873 2.21 1.84666 23.8 22 -1342.955 (variable) 23* 78.892 5.13 1.69560 59.0 24 -53.711 (variable) 25 (aperture) ∞ 40.00 26 68.403 5.41 1.65518 33.6 27 -90.114 3.59 28 -131.106 1.00 1.88300 40.8 29 28.183 7.98 1.49700 81.5 30 -50.363 0.35 31 49.931 7.15 1.43875 94.7 32 -32.755 1.00 2.00100 29.1 33 -257.941 1.90 34 92.628 5.83 1.51273 56.7 35 -37.921 4.00 36 ∞ 33.00 1.60859 46.4 37 ∞ 13.20 1.51633 64.1 38 ∞ 7.40 Image plane ∞ Aspherical data 2nd side K = 0.00000e+000 A 4=-4.99340e-007 A 6= 2.41641e-010 A 8= 1.25643e-013 A10 = -4.83738e-017 9th page K = 0.00000e+000 A 4=-1.76786e-006 A 6=-5.40857e-010 A 8=-2.15222e-012 A10= 4.18772e-015 A12=-3.37964e-018 A14= 1.42743e-021 A16=-2.57489e-025 Side 10 K = 0.00000e+000 A 4=-1.14632e-006 A 6=-3.54167e-010 A 8=-1.37896e-012 A10= 2.34637e-015 A12=-1.92237e-018 A14= 8.62513e-022 A16=-1.71964e-025 Side 12 K = 9.43177e-001 A 4= 1.55709e-005 A 6=-2.84051e-008 A 8= 6.40322e-010 A10=-4.94289e-012 A12=-1.23121e-014 A14= 2.79508e-016 A16=-8.43038e-019 Page 23 K = 1.18650e+000 A 4=-4.15781e-006 A 6= 4.74229e-009 A 8=-3.25084e-011 A10= 1.37516e-013 A12=-2.18329e-016 Various data Zoom ratio 20.77 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 6.50 28.40 135.00 11.69 22.14 135.00 F-number 1.80 1.80 3.06 1.79 1.80 3.06 Field of view: 40.24, 10.96, 2.33, 25.19, 13.95, 2.33 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 291.57 291.57 291.57 291.57 291.57 291.57 BF 7.40 7.40 7.40 7.40 7.40 7.40 d11 0.70 40.36 57.40 19.94 35.29 57.40 d13 7.70 6.00 9.97 6.02 5.84 9.97 d19 56.26 6.25 5.14 30.98 10.50 5.14 d22 8.48 16.66 0.47 12.59 16.35 0.47 d24 2.60 6.47 2.76 6.21 7.77 2.76 Zoom lens group data Group starting plane focal length 1 1 57.83 2 12 -16.09 3 14 -254.82 4 20 -55.77 5 23 46.68 6 25 51.65

[0101] [Numerical Example 11] Unit: mm Surface data Face number rd nd vd 1 -167.356 2.40 1.67300 38.3 2 134.614 4.37 3 322.547 2.40 1.61340 44.3 4 167.503 10.53 1.43875 94.9 5 -184.155 0.32 6 303.065 8.25 1.43387 95.1 7 -170.806 6.15 8 110.899 7.25 1.43387 95.1 9 8957.571 0.23 10 95.353 9.22 1.43387 95.1 11 -427.710 (variable) 12 66.208 4.05 1.78590 44.2 13 96.314 (Variable) 14* 81.919 0.40 2.05090 26.9 15 14.345 (variable) 16 -27.857 0.40 1.95375 32.3 17 34.023 7.19 1.89286 20.4 18 -10.815 0.40 2.00100 29.1 19 -448.373 0.18 20 60.497 5.97 1.68134 31.9 21 -15.143 0.40 1.95375 32.3 22 -35.394 (variable) 23 -58.610 0.50 1.79360 37.1 24 75.498 4.10 1.85478 24.8 25 -63.563 0.97 26 -43.012 0.50 1.88300 40.8 27 -160.170 (variable) 28* 108.279 7.75 1.77250 49.6 29 -30.351 1.00 1.80810 22.8 30 -53.112 (variable) 31 (aperture) ∞ 40.00 32 87.521 4.87 1.84666 23.8 33 -118.217 1.96 34 144.038 0.70 1.88300 40.8 35 29.561 7.15 1.48749 70.2 36 -100.413 0.35 37 35.796 7.10 1.43875 94.7 38 -34.343 0.70 2.00100 29.1 39 67.123 5.40 40 91.043 7.28 1.50127 56.5 41 -32.373 4.00 42 ∞ 33.00 1.60859 46.4 43 ∞ 13.20 1.51633 64.1 44 ∞ 10.45 Image plane ∞ Aspherical data Page 14 K =-1.74717e+000 A 4= 1.57254e-005 A 6= 5.74284e-008 A 8=-2.45038e-009 A10= 4.66166e-011 A12=-4.85742e-013 A14= 2.62745e-015 A16=-5.72457e-018 Page 28 K =-9.54048e-001 A 4=-3.03917e-006 A 6= 1.87653e-009 A 8=-4.45292e-012 A10=9.91639e-015 A12=-1.03154e-017 Various data Zoom ratio 28.00 Wide-angle, Medium, Telephoto, FWM, FLDmin, FLDmax Focal length 7.50 39.69 210.00 14.60 12.74 7.50 F-number 1.80 1.80 3.40 1.80 1.80 1.80 Field of view 36.25 7.89 1.50 20.64 23.34 36.25 Image height 5.50 5.50 5.50 5.50 5.50 5.50 Lens length 299.68 299.68 299.68 299.68 299.68 299.68 BF 10.45 10.45 10.45 10.45 10.45 10.45 d11 0.27 4.49 8.40 1.51 1.20 0.27 d13 0.69 40.69 53.85 19.49 15.70 0.69 d15 7.15 5.69 6.53 5.30 5.17 7.15 d22 67.62 6.21 5.17 30.74 36.98 67.62 d27 1.11 15.40 0.49 9.08 7.52 1.11 d30 1.73 6.10 4.15 12.48 12.01 1.73 Zoom lens group data Group starting plane focal length 1 1 103.76 2 12 254.44 3 14 -16.60 4 16 -49.74 5 23 -69.93 6 28 48.34 7 31 60.11

[0102] [Table 1]

[0103] [Table 2] [Explanation of Symbols]

[0104] L1 First lens group LM: 3 or more intermediate lens groups LR rear lens group M1 First Intermediate Lens Group (Lens Group V1) M2 Second Intermediate Lens Group (Lens Group V2) 1a First sub-lens group 1b Second sub-lens group

Claims

1. A zoom lens comprising, in order from the object side to the image side, a first lens group with positive refractive power that does not move for zooming, three or more intermediate lens groups that move during zooming, and a rear lens group with positive refractive power that does not move for zooming, The spacing between adjacent lens groups changes during zooming. The three or more intermediate lens groups have a negative refractive power lens group V1 and a negative refractive power lens group V2 arranged in sequence from the object side to the image side, and both lens groups V1 and V2 move toward the image side such that the distance between lens group V1 and lens group V2 becomes shorter in the middle of the zoom than at the wide-angle end. The first lens group includes, in order from the object side to the image side, a first sub-lens group that does not move for focusing, and a second sub-lens group with positive refractive power that moves toward the object side for focusing from infinity to close distance. Let mv1 be the amount of movement of lens group V1 from the wide-angle end to the telephoto end, mv2 be the amount of movement of lens group V2 from the wide-angle end to the telephoto end, f1 be the focal length of the first lens group, f1n be the combined focal length of one or more negative refractive power lenses in the first sub-lens group that are continuous from the object side, fvw be the combined focal length of lens group V1 and lens group V2 at the wide-angle end, v1r2 be the radius of curvature of the lens surface on the image side of lens group V1, and v2r1 be the radius of curvature of the lens surface on the object side of lens group V2. 0.60<mv1 / mv2<1.20 -1.50<f1n / f1<-0.80 -20.00<f1 / fvw<-3.00 0.00<(v1r2+v2r1) / (v2r1-v1r2)<1.00 A zoom lens characterized by satisfying the following conditions.

2. Let fv1 be the focal length of lens group V1 and fv2 be the focal length of lens group V2. 0.00<fv1 / fv2<0.80 The zoom lens according to claim 1, characterized by satisfying the following conditions.

3. 0.60<mv1 / f1<1.20 A zoom lens according to claim 1 or 2, characterized by satisfying the following conditions.

4. Let v2r1 be the radius of curvature of the lens surface closest to the object in the aforementioned lens group V2. -2.00<v2r1 / f1<-0.05 A zoom lens according to any one of items 1 to 3, characterized in that it satisfies the following conditions.

5. The lens group V1 includes a lens with negative refractive power, and the average value of the d-line reference Abbe numbers of the negative refractive power lenses in the lens group V1 is defined as νdv1n. 17.0<νdv1n<40.0 A zoom lens according to any one of items 1 to 4, characterized in that it satisfies the following conditions.

6. The lens group V1 includes lenses with negative refractive power, and the average refractive index of the negative refractive power lenses in the lens group V1 with respect to the d line is Ndv1n. 1.80<Ndv1n<2.50 A zoom lens according to any one of items 1 to 5, characterized in that it satisfies the following conditions.

7. The lens group V2 includes lenses with positive refractive power, and the average value of the d-line reference Abbe numbers of the positive refractive power lenses in the lens group V2 is defined as νv2p. 17.0<νdv2p<35.0 A zoom lens according to any one of items 1 to 6, characterized by satisfying the following conditions.

8. A zoom lens comprising, in order from the object side to the image side, a first lens group with positive refractive power that does not move for zooming, three or more intermediate lens groups that move during zooming, and a rear lens group with positive refractive power that does not move for zooming, The spacing between adjacent lens groups changes during zooming. The three or more intermediate lens groups have a negative refractive power lens group V1 and a negative refractive power lens group V2 arranged in sequence from the object side to the image side, and both lens groups V1 and V2 move toward the image side such that the distance between lens group V1 and lens group V2 becomes shorter in the middle of the zoom than at the wide-angle end. The first lens group includes, in order from the object side to the image side, a first sub-lens group that does not move for focusing, and a second sub-lens group with positive refractive power that moves toward the object side for focusing from infinity to close distance. Let mv1 be the amount of movement of lens group V1 from the wide-angle end to the telephoto end, mv2 be the amount of movement of lens group V2 from the wide-angle end to the telephoto end, f1 be the focal length of the first lens group, f1n be the combined focal length of one or more negative refractive power lenses in the first sub-lens group that are continuous from the object side, fvw be the combined focal length of lens group V1 and lens group V2 at the wide-angle end, and νv2p be the average value of the d-line reference Abbe numbers of all positive refractive power lenses arranged in lens group V2. 0.60<mv1 / mv2<1.20 -1.50<f1n / f1<-0.80 -20.00<f1 / fvw<-3.00 17.0<νdv2p<35.0 A zoom lens characterized by satisfying the following conditions.

9. The zoom lens according to any one of claims 1 to 8, characterized in that the three or more intermediate lens groups consist of, in order from the object side to the image side, lens group V1, lens group V2, lens group with negative refractive power, and lens group with positive refractive power.

10. The zoom lens according to any one of claims 1 to 8, characterized in that the three or more intermediate lens groups consist of, in order from the object side to the image side, lens group V1, lens group V2, lens group with positive refractive power, and lens group with positive refractive power.

11. Let fw be the focal length of the zoom lens at the wide-angle end, and ft be the focal length of the zoom lens at the telephoto end. 16.0<ft / fw<160.0 A zoom lens according to any one of items 1 to 10, characterized in that it satisfies the following conditions.

12. Let fw be the focal length of the zoom lens at the wide-angle end, and Z be the zoom ratio of the zoom lens. Then the focal length fwm is: fwm=fw×Z ０．２０ Represented as such, where LDw is the distance between lens group V1 and lens group V2 at the wide-angle end, and LDwm is the distance between lens group V1 and lens group V2 at focal length fwm, 0.40<LDwm / LDw<1.00 A zoom lens according to any one of items 1 to 11, characterized in that it satisfies the following conditions.

13. Let fvi be the combined focal length of lens group V1 and lens group V2 that changes during zooming, and fvw be the combined focal length of lens group V1 and lens group V2 at the wide-angle end. 0.80<fvi / fvw<1.20 A zoom lens according to any one of claims 1 to 12, characterized in that it satisfies the following conditions over the entire zoom range.

14. The zoom lens according to any one of claims 1 to 13, characterized in that the lens group V1 consists of a single lens with negative refractive power.

15. Let fw be the focal length of the zoom lens at the wide-angle end, Z be the zoom ratio of the zoom lens, and fLDmin be the focal length of the zoom lens at which the distance between lens group V1 and lens group V2 is minimized. 0.03<log Ｚ (fLDmin / fw)<0.6 A zoom lens according to any one of items 1 to 14, characterized in that it satisfies the following conditions.

16. A zoom lens according to any one of claims 1 to 15, An imaging device characterized by having an image sensor that captures an image formed by the zoom lens.

Images