Zoom lens and camera having the same

Abstract

The present invention provides a zoom lens and an image pickup device having the zoom lens. The zoom lens includes a first lens unit having negative refractive power and a rear unit having positive refractive power as a whole in order from the object side to the image side. The distance between the first lens unit and the rear unit changes during zooming. The rear unit includes a subunit that moves in a direction having a component of a direction perpendicular to the optical axis during image stabilization. The first lens unit includes three or more negative lenses in order from the object side to the image side. A predetermined condition is satisfied.

Description

Technical Field

[0001] The present invention relates to a zoom lens which is suitable for use in digital video cameras, digital still cameras, broadcast cameras, film cameras, surveillance cameras, vehicle-mounted cameras, and the like. Background Art

[0002] Conventionally, as image stabilization components, a lens shift type image stabilization mechanism that shifts a part of an optical system in a direction perpendicular to the optical axis and a sensor shift type image stabilization mechanism that shifts an image sensor in the direction are known. Japanese Patent Application Laid-Open ("JP") 2019-215565 discloses a zoom lens including a lens shift type image stabilization mechanism.

[0003] In the zoom lens disclosed in JP 2019-215565, when a large correction amount is pursued, the decentering amount of the image stabilization unit increases, and the image is blurred due to decentering aberration when the image is stabilized.

[0004] When using an ultra-wide-angle zoom lens having an angle of view exceeding 100°, a sensor shift type image stabilization mechanism is generally used because a large correction amount can be obtained with a small shift amount. Since the amount of movement of the image point corresponding to the change in the incident angle of the light incident on the optical system using the center projection method is not uniform on the imaging surface, even if image stabilization is performed at the center of the imaging surface in a zoom lens that suppresses distortion by the center projection method, a large amount of image blur remains at the periphery of the imaging surface. In order to suppress the image blur in the periphery of the imaging surface, if the projection method is introduced into the equidistant projection method that does not have an image blur difference, the image will be severely distorted, and therefore, such a zoom lens is generally used with an imaging device having an electronic distortion correction function that corrects the distortion in image processing. However, if the distortion in the center projection method is excessively generated, the image quality at the periphery of the imaging surface deteriorates due to the electronic distortion correction. Therefore, in order to suppress the image quality degradation at the periphery of the imaging surface due to image stabilization and electronic distortion correction, it is necessary to appropriately set the distortion in the center projection method.

[0005] Since the image stabilization sensitivity (the ratio of the image stabilization amount to the unit movement amount of the image stabilization unit) at the periphery of the imaging plane is higher than that at the center of the imaging plane, the lens shift type image stabilization mechanism can suppress image blur at the periphery of the imaging plane. Therefore, it is desirable to install a lens shift type image stabilization mechanism on an ultra-wide-angle zoom lens. Summary of the invention

[0006] The present invention provides a zoom lens and an image pickup apparatus having the zoom lens, each of which can maintain high optical performance while stabilizing an image while achieving a wide viewing angle and miniaturization.

[0007] A zoom lens according to one aspect of the present invention includes, in order from the object side to the image side, a first lens unit having negative refractive power and a rear unit having positive refractive power as a whole. The distance between the first lens unit and the rear unit changes during zooming. The rear unit includes a subunit that moves in a direction having a component of a direction perpendicular to the optical axis during image stabilization. The first lens unit includes three or more negative lenses in order from the object side to the image side. The following inequality is satisfied:

[0008] -20 <Dist_w<-8

[0009] -0.4 <f1 / fLN<0.7

[0010] Wherein, Dist_w is the distortion amount at the maximum image height in the infinite focus state at the wide-angle end, f1 is the focal length of the first lens unit, and fLN is the focal length of the final lens unit closest to the image plane. According to another aspect of the present invention, an imaging device comprises: the above-mentioned zoom lens; and an image sensor configured to receive an image formed by the zoom lens.

[0011] Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a cross-sectional view of a zoom lens according to Example 1.

[0013] Figure 2A and Figure 2B These are longitudinal aberration diagrams of the zoom lens in Example 1 at the wide-angle end and at the telephoto end, respectively.

[0014] Figure 3A and Figure 3B These are lateral aberration diagrams of the zoom lens in Example 1 at the wide-angle end and at the telephoto end when the image is stabilized, respectively.

[0015] Figure 4 is a cross-sectional view of a zoom lens according to Example 2.

[0016] Figure 5A and Figure 5B These are longitudinal aberration diagrams of the zoom lens in Example 2 at the wide-angle end and at the telephoto end, respectively.

[0017] Fig. 6A and Figure 6B These are lateral aberration diagrams of the zoom lens in Example 2 at the wide-angle end and at the telephoto end when the image is stabilized, respectively.

[0018] Figure 7 is a cross-sectional view of a zoom lens according to Example 3.

[0019] Fig. 8A and Figure 8B These are longitudinal aberration diagrams of the zoom lens in Example 3 at the wide-angle end and at the telephoto end, respectively.

[0020] Fig.9A and Fig. 9B These are lateral aberration diagrams of the zoom lens in Example 3 at the wide-angle end and at the telephoto end when the image is stabilized, respectively.

[0021] Fig.10 is a cross-sectional view of a zoom lens according to Example 4.

[0022] Fig.11A and Fig. 11B These are longitudinal aberration diagrams of the zoom lens in Example 4 at the wide-angle end and at the telephoto end, respectively.

[0023] Fig. 12A and Fig. 12B These are lateral aberration diagrams of the zoom lens in Example 4 at the wide-angle end and at the telephoto end when the image is stabilized, respectively.

[0024] Fig.13 is a cross-sectional view of a zoom lens according to Example 5.

[0025] Fig.14A and Fig. 14B These are longitudinal aberration diagrams of the zoom lens in Example 5 at the wide-angle end and at the telephoto end, respectively.

[0026] Fig.15A and Fig. 15B These are lateral aberration diagrams of the zoom lens in Example 5 at the wide-angle end and at the telephoto end when the image is stabilized, respectively.

[0027] Fig.16 is a cross-sectional view of a zoom lens according to Example 6.

[0028] Fig.17A and Fig. 17B These are longitudinal aberration diagrams of the zoom lens in Example 6 at the wide-angle end and at the telephoto end, respectively.

[0029] Fig.18A and Fig.18B These are lateral aberration diagrams of the zoom lens in Example 6 at the wide-angle end and at the telephoto end when the image is stabilized, respectively.

[0030] Fig.19 is a cross-sectional view of a zoom lens according to Example 7.

[0031] Fig. 20A and Fig. 20B These are longitudinal aberration diagrams of the zoom lens in Example 7 at the wide-angle end and at the telephoto end, respectively.

[0032] Fig.21A and Fig.21B These are lateral aberration diagrams of the zoom lens in Example 7 at the wide-angle end and at the telephoto end when the image is stabilized, respectively.

[0033] Fig. 22 It is a cross-sectional view of the imaging device. DETAILED DESCRIPTION

[0034] Now, a detailed description of the embodiments according to the present invention will be given with reference to the accompanying drawings. Corresponding elements in the various drawings will be designated by the same reference numerals, and their repeated description will be omitted.

[0035] Figure 1 , Figure 4 , Figure 7 , Fig.10 , Fig.13 , Fig.16 and Fig.19 These are cross-sectional views of the zoom lens L0 according to Examples 1 to 7 in an infinitely focused state at the wide-angle end. The zoom lens L0 according to each example is used for an imaging device such as a digital video camera, a digital still camera, a broadcast camera, a silver salt film camera, a surveillance camera, and a car camera. The zoom lens L0 according to each example can also be applied to a projection lens in a projector, etc.

[0036] In each cross-sectional view, the left side is the object side (front), and the right side is the image side (rear). The zoom lens L0 according to each example includes a plurality of lens units. In this specification, a lens unit is a lens group that moves or remains stationary as a whole during zooming. That is, in the zoom lens L0 according to each example, the distance between adjacent lens units changes during zooming. The lens unit includes one or more than one lens. The lens unit may include elements other than the lens unit, such as an aperture stop.

[0037] The zoom lens L0 according to each example includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having positive refractive power as a whole. The rear unit LR includes all lens units on the image side of the first lens unit L1. In the zoom lens L0 according to each example, the distance between the first lens unit L1 and the rear unit LR changes during zooming.

[0038] In each cross-sectional view, Li represents the i-th lens unit (i is a natural number) counted from the object side among the lens units included in the zoom lens L0. LN represents the final lens unit closest to the image side.

[0039] SP denotes an aperture stop. The aperture stop SP is provided on the object side or inside the second lens unit L2. FC denotes a sub-aperture stop. IP denotes an image plane, and when the zoom lens L0 according to each example is used as an imaging optical system for a digital still camera or a digital video camera, an imaging plane of a solid-state image sensor (photoelectric conversion element) such as a CCD sensor and a CMOS sensor is arranged here. When the zoom lens L0 according to each example is used as an imaging optical system of a film-based camera, a photosensitive surface corresponding to a film surface is placed on the image plane IP.

[0040] The arrows shown in the cross-sectional views indicate the moving direction of the lens unit during zooming from the wide-angle end to the telephoto end, or the moving direction of the lens unit during focusing from an infinitely distant object to a close-distance object. Although in each example, a single lens unit moves as a whole during focusing, the present invention is not limited to this embodiment. During focusing, only a part of the lens unit may be moved, or the entire zoom lens L0 may be moved. During focusing, a plurality of lenses may be moved along different trajectories.

[0041] Figure 2A , Figure 2B , Figure 5A , Figure 5B , Fig. 8A , Figure 8B , Fig.11A , Fig. 11B , Fig.14A , Fig. 14B , Fig.17A , Fig. 17B , Fig. 20A and Fig. 20B ] are longitudinal aberration diagrams of the zoom lens L0 according to Examples 1 to 7, respectively. In each longitudinal aberration diagram, Figure 2A , Figure 5A , Fig. 8A , Fig.11A , Fig.14A , Fig.17A and Fig. 20A is a longitudinal aberration diagram of the zoom lens L0 at the wide angle end, and Figure 2B , Figure 5B , Figure 8B , Fig. 11B , Fig. 14B , Fig. 17B and Fig. 20B is a longitudinal aberration diagram of the zoom lens L0 at the telephoto end. In the spherical aberration diagram, Fno represents the F number and indicates the amount of spherical aberration for each d-line (wavelength 587.6nm) and g-line (wavelength 435.8nm). In the astigmatism diagram, M represents the amount of astigmatism on the meridional image plane, and S represents the amount of astigmatism on the sagittal image plane. The distortion diagram shows the amount of distortion for the d-line. The chromatic aberration diagram shows the chromatic aberration for the g-line. ω is the imaging half angle of view (°).

[0042] Figure 3A , Figure 3B , Fig. 6A , Figure 6B , Fig.9A , Fig. 9B , Fig. 12A , Fig. 12B , Fig.15A , Fig. 15B , Fig.18A , Fig.18B , Fig.21A and Fig.21B : is a lateral aberration diagram of the zoom lens L0 during image stabilization at 0.3° according to each example. In each lateral aberration diagram, Figure 3A , Fig. 6A , Fig.9A , Fig. 12A , Fig.15A , Fig.18A and Fig.21A is the lateral aberration diagram of the zoom lens L0 at the wide angle end, and Figure 3B , Figure 6B , Fig. 9B , Fig. 12B , Fig. 15B , Fig.18B and Fig.21B is the lateral aberration diagram of the zoom lens L0 at the telephoto end. The unit of each axis is mm. Y is the image height (mm) obtained by evaluating the lateral aberration diagram.

[0043] Next is a description of the characteristic structure of the zoom lens L0 according to various examples.

[0044] The zoom lens L0 according to each example is a so-called negative lead type zoom lens in which the first lens unit L1 has negative refractive power. The negative lead type zoom lens is known as an effective structure for expanding the angle of view of the zoom lens.

[0045] The rear unit LR includes a subunit (image stabilization unit) LIS, which moves in a direction having a component in a direction perpendicular to the optical axis during image stabilization. Thus, the height of off-axis light incident on the subunit LIS can be reduced, and degradation of optical performance during image stabilization can be suppressed. In this specification, a subunit is a lens group whose constituent length (the distance on the optical axis from the lens surface closest to the object in the subunit to the lens surface closest to the image plane in the subunit) does not change during zooming. The subunit may be a single lens unit, or a part of a single lens unit.

[0046] The first lens unit L1 includes three or more negative lenses in order from the object side to the image side. This configuration can ensure a sufficiently wide viewing angle (such as a viewing angle of 100° or more at the wide angle end).

[0047] The zoom lens L0 according to each example satisfies the following inequalities (conditional expressions) (1) and (2).

[0048] -20 <Dist_w<-8 (1)

[0049] -0.4 <f1 / fLN<0.7 (2)

[0050] Wherein, Dist_w is the distortion amount at the maximum image height in the infinite focus state at the wide angle end, f1 is the focal length of the first lens unit L1, and fLN is the focal length of the final lens unit LN.

[0051] Inequality (1) defines the amount of distortion at the maximum image height in the infinity focus state at the wide-angle end. The maximum image height is the distance from the optical axis to the image point that is farthest from the optical axis among the image points that can be photographed. If the amount of distortion exceeds the upper limit in inequality (1) and becomes too large, the amount of distortion in the equidistant projection method is too large, and the image quality of the periphery of the imaging surface deteriorates significantly during image stabilization. Even in lens shift type image stabilization, image stabilization of the periphery of the imaging surface becomes insufficient. If the amount of distortion is lower than the lower limit in inequality (1) and becomes too small, it is difficult to suppress the degradation of the image quality of the periphery of the imaging surface during electronic distortion correction.

[0052] The distortion amount Dist_w[%] at any image height at the wide-angle end is defined by the following equation:

[0053] Dist_w[%]=((yp-y) / y)×100

[0054] Where y is the ideal image height in the central projection method, and yp is the actual image height.

[0055] The ideal image height y in the central projection method is defined by the following equation:

[0056] y=f·tanθi

[0057] Where f is the focal length of the zoom lens L0, and θi is the half-angle of the actual light at any image height.

[0058] Inequality (2) defines the ratio of the focal length of the first lens unit L1 to the focal length of the final lens unit LN. Satisfying inequality (2) can achieve both miniaturization and high image quality. If the negative refractive power of the final lens unit LN exceeds the upper limit in inequality (2) and becomes too strong, it becomes difficult to achieve the refractive power configuration of retrofocus, and it is difficult to expand the viewing angle while ensuring the back focus at the wide-angle end. If the positive refractive power of the final lens unit LN is lower than the lower limit in inequality (2) and becomes too strong, the refractive power configuration of retrofocus becomes strong, the asymmetry of the refractive power configuration of the zoom lens L0 becomes significant, and it is difficult to correct the distortion at the wide-angle end. In addition, it is difficult to shorten the total lens length of the zoom lens L0 at the wide-angle end (the distance on the optical axis from the lens surface closest to the object side to the image plane IP).

[0059] Due to the above-described structure, the zoom lens L0 according to each example can achieve both a wide angle of view and miniaturization, and can maintain high optical performance while stabilizing the image.

[0060] The numerical ranges of inequalities (1) and (2) can be replaced by the numerical ranges of inequalities (1a) and (2a) as follows:

[0061] -19 <Dist_w<-9 (1a)

[0062] -0.37 <f1 / fLN<0.60 (2a)

[0063] The numerical ranges of inequalities (1) and (2) can be replaced by the numerical ranges of inequalities (1b) and (2b) as follows:

[0064] -18 <Dist_w<-10 (1b)

[0065] -0.34 <f1 / fLN<0.50 (2b)

[0066] Next is a description of conditions that the zoom lens L0 according to various examples may satisfy. The zoom lens L0 according to various examples may satisfy one or more of the following inequalities (3) to (11):

[0067] 1.0<|fLIS / ft|<4.0 (3)

[0068] 0.00≤dIS / dt<0.25 (4)

[0069] 0.1 <dLIS / dR<10.0 (5)

[0070] 30<νLIS<70 (6)

[0071] -1.0<(r1+r2) / (r1-r2)<0.6 (7)

[0072] -2.2 <f1 / skw<-0.9 (8)

[0073] -2.2 <f1 / fw<-1.0 (9)

[0074] -0.5 <fw / fLN<0.3 (10)

[0075] -1.5 <Ymax_w / f1<-0.4 (11)

[0076] Here, fLIS is the focal length of the subunit LIS. ft is the focal length of the zoom lens L0 at the telephoto end. dIS is the distance on the optical axis from the lens surface closest to the object in the rear unit LR to the lens surface closest to the object in the subunit LIS at the telephoto end. dt is the total lens length of the zoom lens L0 at the telephoto end. dLIS is the distance on the optical axis from the lens surface closest to the object in the subunit LIS to the lens surface closest to the image plane in the subunit LIS. dR is the distance on the optical axis from the lens surface closest to the image plane in the subunit LIS to the lens surface closest to the object in the lens unit adjacent to the subunit LIS and arranged on the image side of the subunit LIS at the wide-angle end. νLIS is the Abbe number of the lens with the shortest focal length in the subunit LIS. r1 is the radius of curvature of the lens surface closest to the object in the subunit LIS. r2 is the radius of curvature of the lens surface closest to the image plane in the subunit LIS. skw is the back focus of the zoom lens L0 at the wide angle end. fw is the focal length of the zoom lens L0 at the wide angle end. Ymax_w is the maximum image height at the wide angle end.

[0077] Inequality (3) defines the refractive power of the subunit LIS. Satisfying inequality (3) can reduce the outer diameter of the lens and suppress aberration fluctuations during image stabilization. If the refractive power of the subunit LIS exceeds the upper limit in inequality (3) and becomes too weak, the movement amount of the subunit LIS during image stabilization becomes too large, and it becomes difficult to reduce the outer diameter of the lens. If the refractive power of the subunit LIS is lower than the lower limit in inequality (3) and becomes too strong, it becomes difficult to suppress fluctuations in coma aberration and field curvature during image stabilization.

[0078] Inequality (4) defines the distance on the optical axis from the lens surface closest to the object in the rear unit LR to the lens surface closest to the object in the subunit LIS at the telephoto end. If the distance from the lens surface closest to the object in the rear unit LR to the lens surface closest to the object in the subunit LIS exceeds the upper limit in inequality (4) and becomes too long, it becomes difficult to suppress the fluctuation of coma aberration during image stabilization. If the distance from the lens surface closest to the object in the rear unit LR to the lens surface closest to the object in the subunit LIS is lower than the lower limit in inequality (4) and becomes too short, it becomes difficult to appropriately configure the drive unit for driving the subunit LIS or the drive unit for driving the aperture SP.

[0079] Inequality (5) defines the ratio of the thickness of the subunit LIS to the distance (interval) in the subsequent group LR. If the subunit LIS exceeds the upper limit in inequality (5) and becomes too thick, the subunit LIS becomes heavy, the drive unit becomes large, and it becomes difficult to reduce the outer diameter of the lens. If the subunit LIS is below the lower limit of inequality (5) and becomes too thin, it becomes difficult to appropriately set the curvature radius of the subunit LIS, and it becomes difficult to suppress the fluctuation of coma aberration and field curvature during image stabilization.

[0080] Inequality (6) defines the Abbe number of the lens with the shortest focal length included in the subunit LIS. When the subunit LIS has a positive refractive power, the Abbe number of the positive lens is defined, and when the subunit LIS has a negative refractive power, the Abbe number of the negative lens is defined. If the Abbe number is higher than the upper limit in inequality (6), the refractive index becomes small, and it becomes difficult to suppress the fluctuation of the coma aberration during image stabilization. If the Abbe number is lower than the lower limit in inequality (6), it becomes difficult to suppress the fluctuation of the lateral chromatic aberration during image stabilization.

[0081] Inequality (7) defines the shape factor of the subunit LIS. If the value is higher than the upper limit in inequality (7) and the subunit LIS has a meniscus shape with a concave surface facing the image side, it becomes difficult to suppress fluctuations in field curvature during image stabilization. If the value is lower than the lower limit in inequality (7) and the subunit LIS has a meniscus shape with a concave surface facing the object side, it becomes difficult to suppress fluctuations in coma aberration during image stabilization.

[0082] Inequality (8) defines the ratio of the back focal length of the zoom lens L0 to the focal length of the first lens unit L1 at the wide-angle end. If the negative refractive power of the first lens unit L1 exceeds the upper limit in the conditional inequality (8) and becomes too strong, the asymmetry of the refractive power configuration of the zoom lens L0 becomes significant, and it becomes difficult to correct the distortion at the wide-angle end. If the negative refractive power of the first lens unit L1 is lower than the lower limit in the inequality (8) and becomes too weak, it becomes difficult to achieve a wide viewing angle exceeding 100° at the wide-angle end. In addition, the diameter of the front lens becomes larger, and the outer diameter of the lens becomes larger.

[0083] Inequality (9) defines the focal length of the first lens unit L1. If the negative refractive power of the first lens unit L1 exceeds the upper limit in the conditional inequality (9) and becomes too strong, the asymmetry of the refractive power configuration of the zoom lens L0 becomes significant, and it becomes difficult to correct the distortion at the wide-angle end. If the refractive power of the first lens unit L1 is lower than the lower limit in the inequality (9) and becomes too weak, it becomes difficult to achieve a wide viewing angle exceeding 100° at the wide-angle end. In addition, the diameter of the front lens becomes larger, and the outer diameter of the lens becomes larger.

[0084] Inequality (10) defines the focal length of the final lens unit LN. If the positive refractive power of the final lens unit LN exceeds the upper limit in the conditional inequality (10) and becomes too strong, the refractive power configuration of the back focus becomes strong, the asymmetry of the aberration of the refractive power configuration of the zoom lens L0 becomes significant, and it becomes difficult to correct the distortion at the wide-angle end. In addition, it becomes difficult to shorten the total length of the lens at the wide-angle end. If the negative refractive power of the final lens unit LN is lower than the lower limit in the inequality (10) and becomes too strong, it becomes difficult to achieve the refractive power configuration of the back focus, and it is difficult to expand the viewing angle while ensuring the back focus at the wide-angle end.

[0085] Inequality (11) defines the maximum image height that can be photographed at the wide-angle end. Satisfying inequality (11) can make the zoom lens L0 smaller and lighter. If the maximum image height exceeds the upper limit and is too large, light within a range wider than the desired viewing angle will be imaged on the imaging surface, making the mechanical mechanism and the optical system too large. Therefore, it becomes difficult to reduce the size and weight of the zoom lens L0. If the maximum image height is below the lower limit and is too small, the viewing angle will be narrower than the desired viewing angle.

[0086] The numerical ranges of inequalities (3) and (11) can be replaced by the numerical ranges of inequalities (3a) and (11a) as follows:

[0087] 1.1<|fLIS / ft|<3.5 (3a)

[0088] 0.00≤dIS / dt<0.20 (4a)

[0089] 0.2 <dLIS / dR<8.0 (5a)

[0090] 32<νLIS<68 (6a)

[0091] -0.8<(r1+r2) / (r1-r2)<0.5 (7a)

[0092] -2.1 <f1 / skw<-1.0 (8a)

[0093] -2.1 <f1 / fw<-1.1 (9a)

[0094] -0.40 <fw / fLN<0.25 (10a)

[0095] -1.4 <Ymax_w / f1<-0.5 (11a)

[0096] The numerical ranges of inequalities (3) and (11) can be replaced by the numerical ranges of inequalities (3b) and (11b) as follows:

[0097] 1.2<|fLIS / ft|<3.0 (3b)

[0098] 0.00≤dIS / dt<0.15 (4b)

[0099] 0.3 <dLIS / dR<6.0 (5b)

[0100] 34<νLIS<66 (6b)

[0101] -0.7<(r1+r2) / (r1-r2)<0.4 (7b)

[0102] -2.0 <f1 / skw<-1.1 (8b)

[0103] -2.0 <f1 / fw<-1.2 (9b)

[0104] -0.30 <fw / fLN<0.20 (10b)

[0105] -1.3 <Ymax_w / f1<-0.6 (11b)

[0106] Next is a description of structures that can be satisfied by the zoom lens L0 according to various examples.

[0107] The subunit LIS may include a positive lens and a negative lens. This structure can effectively suppress fluctuations in lateral chromatic aberration and field curvature during image stabilization.

[0108] The rear unit LR may be arranged on the image side of the subunit LIS and include two or more lenses whose distance changes during zooming. This structure can achieve a sufficient magnification ratio (such as two times, etc.) while ensuring a sufficient wide angle (such as a viewing angle of 100° or more at the wide-angle end).

[0109] The rear unit LR may be arranged on the image side of the subunit LIS and include a focusing unit that moves during focusing. The image stabilization unit arranged near the aperture and the focusing unit arranged near the image plane may suppress aberration fluctuations during image stabilization and aberration fluctuations during focusing at the same time.

[0110] At the wide angle end, the distance between the first lens unit L1 and the rear unit LR can be the largest among the distances between the lens units included in the zoom lens L0. This structure can increase the change in the distance between the first lens unit L1 and the rear unit LR during zooming, and it becomes easy to ensure the zoom ratio.

[0111] The first lens unit L1 may include a positive lens. This structure can correct chromatic aberration in the first lens unit L1, and can suppress fluctuation of chromatic aberration during zooming.

[0112] The zoom lens L0 may have a memory storing distortion correction data for correcting distortion. This structure can miniaturize the zoom lens L0.

[0113] A detailed description will now be given of the zoom lens L0 according to various examples.

[0114] The zoom lens L0 according to Example 1 includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having negative refractive power as a whole. The rear unit LR includes, in order from the object side to the image side, a second lens unit L2 having positive refractive power, a third lens unit L3 having negative refractive power, a fourth lens unit L4 having negative refractive power, and a fifth lens unit L5 having positive refractive power. A part of the second lens unit L2 is a subunit LIS. The third lens unit L3 is a focusing unit. The fifth lens unit L5 is a final lens unit LN. During zooming from the wide-angle end to the telephoto end, the first lens unit L1 moves to the image side and then moves to the object side. The second lens unit L2 moves toward the object while reducing the distance from the first lens unit L1. The third lens unit L3 moves toward the object while increasing the distance from the second lens unit L2. The fourth lens unit L4 moves toward the object while reducing the distance from the third lens unit L3. The fifth lens unit L5 moves to the object side while increasing the distance from the fourth lens unit L4, and then moves to the image side. During focusing from an infinitely distant object to a close-distance object, the third lens unit L3 moves to the image side.

[0115] The zoom lens L0 according to Example 2 includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having negative refractive power as a whole. The rear unit LR includes, in order from the object side to the image side, a second lens unit L2 having positive refractive power, a third lens unit L3 having negative refractive power, a fourth lens unit L4 having positive refractive power, a fifth lens unit L5 having negative refractive power, and a sixth lens unit L6 having positive refractive power. The third lens unit L3 is a subunit LIS. The fifth lens unit L5 is a focusing unit. The sixth lens unit L6 is a final lens unit LN. During zooming from the wide angle end to the telephoto end, the first lens unit L1 moves to the image side. The second lens unit L2 moves toward the object while reducing the distance from the first lens unit L1. The third lens unit L3 moves toward the object while reducing the distance from the second lens unit L2. The fourth lens unit L4 moves toward the object while reducing the distance from the third lens unit L3. The fifth lens unit L5 moves toward the object while increasing the distance from the fourth lens unit L4. The sixth lens unit L6 moves toward the object while increasing the distance from the fifth lens unit L5. During focusing from an infinitely distant object to a close object, the fifth lens unit L5 moves to the image side.

[0116] The zoom lens L0 according to Example 3 includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having negative refractive power as a whole. The rear unit LR includes, in order from the object side to the image side, a second lens unit L2 having positive refractive power, a third lens unit L3 having positive refractive power, a fourth lens unit L4 having negative refractive power, a fifth lens unit L5 having negative refractive power, and a sixth lens unit L6 having positive refractive power. A part of the second lens unit L2 is a subunit LIS. The fourth lens unit L4 is a focusing unit. The sixth lens unit L6 is a final lens unit LN. During zooming from the wide-angle end to the telephoto end, the first lens unit L1 moves to the image side and then moves to the object side. The second lens unit L2 moves toward the object while reducing the distance from the first lens unit L1. The third lens unit L3 moves toward the object while reducing the distance from the second lens unit L2. The fourth lens unit L4 moves toward the object while increasing the distance from the third lens unit L3. The fifth lens unit L5 moves toward the object while reducing the distance from the fourth lens unit L4. The sixth lens unit L6 is fixed (immovable). During focusing from an infinitely distant object to a close object, the fourth lens unit L4 moves to the image side.

[0117] The zoom lens L0 according to Example 4 includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having negative refractive power as a whole. The rear unit LR includes, in order from the object side to the image side, a second lens unit L2 having positive refractive power, a third lens unit L3 having negative refractive power, a fourth lens unit L4 having positive refractive power, a fifth lens unit L5 having negative refractive power, a sixth lens unit L6 having negative refractive power, and a seventh lens unit L7 having positive refractive power. The third lens unit L3 is a subunit LIS. The fifth lens unit L5 is a focusing unit. The seventh lens unit L7 is a final lens unit LN. During zooming from the wide-angle end to the telephoto end, the first lens unit L1 moves to the image side and then moves to the object side. The second lens unit L2 moves toward the object while reducing the distance from the first lens unit L1. The third lens unit L3 moves toward the object while increasing the distance from the second lens unit L2. The fourth lens unit L4 moves toward the object while reducing the distance from the third lens unit L3. The fifth lens unit L5 moves toward the object while increasing the distance from the fourth lens unit L4. The sixth lens unit L6 moves toward the object while reducing the distance from the fifth lens unit L5. The seventh lens unit L7 is fixed. During focusing from an infinitely distant object to a close object, the fifth lens unit L5 moves to the image side.

[0118] The zoom lens L0 according to Example 5 includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having negative refractive power as a whole. The rear unit LR includes, in order from the object side to the image side, a second lens unit L2 having positive refractive power, a third lens unit L3 having negative refractive power, a fourth lens unit L4 having negative refractive power, and a fifth lens unit L5 having positive refractive power. A part of the second lens unit L2 is a subunit LIS. The third lens unit L3 is a focusing unit. The fifth lens unit L5 is a final lens unit LN. During zooming from the wide-angle end to the telephoto end, the first lens unit L1 moves to the image side and then moves to the object side. The second lens unit L2 moves toward the object while reducing the distance from the first lens unit L1. The third lens unit L3 moves toward the object while increasing the distance from the second lens unit L2. The fourth lens unit L4 moves toward the object while reducing the distance from the third lens unit L3. The fifth lens unit L5 moves to the image side while increasing the distance from the fourth lens unit L4. During focusing from an infinitely distant object to a close-distance object, the third lens unit L3 moves to the image side.

[0119] The zoom lens L0 according to Example 6 includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having negative refractive power as a whole. The rear unit LR includes, in order from the object side to the image side, a second lens unit L2 having positive refractive power, a third lens unit L3 having positive refractive power, a fourth lens unit L4 having negative refractive power, a fifth lens unit L5 having negative refractive power, and a sixth lens unit L6 having positive refractive power. A part of the second lens unit L2 is a subunit LIS. The fourth lens unit L4 is a focusing unit. The sixth lens unit L6 is a final lens unit LN. During zooming from the wide-angle end to the telephoto end, the first lens unit L1 moves to the image side and then moves to the object side. The second lens unit L2 moves toward the object while reducing the distance from the first lens unit L1. The third lens unit L3 moves toward the object while reducing the distance from the second lens unit L2. The fourth lens unit L4 moves toward the object while increasing the distance from the third lens unit L3. The fifth lens unit L5 moves toward the object while reducing the distance from the fourth lens unit L4. The sixth lens unit L6 is fixed. During focusing from an infinitely distant object to a close-distance object, the fourth lens unit L4 moves to the image side.

[0120] The zoom lens according to Example 7 includes, in order from the object side to the image side, a first lens unit L1 having negative refractive power and a rear unit LR having negative refractive power as a whole. The rear unit LR includes, in order from the object side to the image side, a second lens unit L2 having positive refractive power, a third lens unit L3 having negative refractive power, and a fourth lens unit L4 having negative refractive power. A part of the second lens unit L2 is a subunit LIS. The third lens unit L3 is a focusing unit. The fourth lens unit L4 is a final lens unit LN. During zooming from the wide-angle end to the telephoto end, the first lens unit L1 moves to the image side and then moves to the object side. The second lens unit L2 moves toward the object while reducing the distance from the first lens unit L1. The third lens unit L3 moves toward the object while increasing the distance from the second lens unit L2. The fourth lens unit L4 moves toward the object while reducing the distance from the third lens unit L3. During focusing from an object at infinity to an object at a close distance, the third lens unit L3 moves to the image side.

[0121] Numerical Examples 1 to 7 corresponding to Examples 1 to 7 will be shown below.

[0122] In the surface data in each numerical example, r represents the radius of curvature of each optical surface, and d (mm) represents the on-axis distance (distance on the optical axis) between the mth surface and the (m+1)th surface, where m is the number of the surface counted from the light incident side. nd represents the refractive index of each optical element for the d-line, and νd represents the Abbe number of the optical element. The Abbe number νd of a specific material is expressed as follows:

[0123] νd=(Nd-1) / (NF-NC)

[0124] Among them, Nd, NF and NC are the refractive indices for the d line (587.6nm), F line (486.1nm), C line (656.3nm) and g line (wavelength 435.8nm) in the Fraunhofer spectrum.

[0125] In each numerical example, all values ​​in d, focal length (mm), F number, and half angle of view (degrees) are set when the zoom lens L0 according to each example is focused on an object at infinity. The "back focal length" is the distance on the optical axis from the final lens surface (the lens surface closest to the image plane) to the paraxial image plane, and is converted into an air equivalent length. The "total lens length" is the length obtained by adding the back focal length to the distance on the optical axis from the frontmost surface of the zoom lens L0 (the lens surface closest to the object) to the final surface of the zoom lens L0. A "lens unit" may include one or more than one lens.

[0126] If the optical surface is an aspherical surface, an asterisk * is appended to the right of the surface number. The aspherical shape is expressed as follows:

[0127] X=(h 2 / R) / [1+{1-(1+K)(h / R) 2} 1 / 2 +A4×h 4 +A6×h 6 +A8×h 8 +A10×h 10 +A12×h 12

[0128] Among them, X is the displacement relative to the surface vertex in the direction of the optical axis, h is the height relative to the optical axis in the direction perpendicular to the optical axis, R is the paraxial curvature radius, K is the cone constant, and A4, A6, A8, A10 and A12 are aspheric coefficients of various orders. The "e±XX" in each aspheric coefficient means "×10 ±XX ”.

[0129] [Numerical Example 1]

[0130] Unit: mm

[0131] Surface data

[0132]

[0133]

[0134]

[0135] Aspheric surface data

[0136] Surface 3

[0137] K=0.00000e+000 A4=7.52315e-005 A6=-2.85004e-007 A8=8.08696e-010A10=-1.62370e-012 A12=2.19074e-015 A14=-1.39196e-018

[0138] Surface 4

[0139] K=-7.00172e-001 A4=8.26202e-005 A6=-2.36130e-007 A8=-1.14795e-010A10=2.29302e-012 A12=-5.42273e-015 A14=3.67687e-018

[0140] Surface 25

[0141] K=0.00000e+000 A4=-4.19009e-005 A6=-1.88923e-007 A8=2.54663e-009 A10=-2.45675e-011 A12=1.85699e-013

[0142] Surface 26

[0143] K=0.00000e+000 A4=-3.92596e-006 A6=-2.00765e-007 A8=4.34769e-009 A10=-4.17031e-011 A12=2.70334e-013

[0144] Surface 30

[0145] K=0.00000e+000 A4=3.55737e-005 A6=8.04633e-008 A8=-5.06048e-011A10=-1.92129e-012 A12=1.00728e-014 Various data

[0146]

[0147] Zoom lens unit data

[0148]

[0149] [Numerical Example 2]

[0150] Unit: mm Surface data

[0151]

[0152]

[0153] Aspheric surface data

[0154] Surface 3

[0155] K=0.00000e+000 A4=6.49432e-005 A6=-2.09847e-007 A8=3.22034e-010A10=-3.56124e-014 A12=-2.65892e-016 A14=-2.11568e-019

[0156] Surface 4

[0157] K=-5.81434e-001 A4=7.42938e-005 A6=-8.59222e-008 A8=-1.56177e-009A10=9.19947e-012 A12=-2.30787e-014 A14=1.96904e-017

[0158] Surface 25

[0159] K=0.00000e+000 A4=-1.13378e-005 A6=-4.96476e-009 A8=3.96013e-011A10=5.02938e-013 A12=1.73732e-015

[0160] Surface 26

[0161] K=0.00000e+000 A4=-6.09923e-006 A6=1.18821e-008 A8=4.84539e-011A10=-6.24432e-014 A12=4.33687e-015

[0162] Surface 30

[0163] K=0.00000e+000 A4=-6.59258e-005 A6=7.46300e-007 A8=-5.93573e-009A10=2.94143e-011 A12=-6.27604e-014

[0164] Surface 31

[0165] K=0.00000e+000 A4=-2.90274e-005 A6=6.29498e-007 A8=-3.79841e-009A10=1.47494e-011 A12=-2.52922e-014

[0166] Various data

[0167]

[0168] Zoom lens unit data

[0169]

[0170]

[0171] [Numerical Example 3]

[0172] Unit: mm

[0173] Surface data

[0174]

[0175]

[0176] Aspheric surface data

[0177] Surface 3

[0178] K=0.00000e+000 A4=-4.03233e-005 A6=2.84310e-007 A8=-1.85419e-009A10=6.48125e-012 A12=-1.22378e-014 A14=9.28892e-018

[0179] Surface 4

[0180] K=-5.60601e-001 A4=-6.16452e-005 A6=2.38219e-007 A8=-1.71089e-009A10=-6.46493e-012 A12=6.50194e-014 A14=-1.76965e-016

[0181] Surface 22

[0182] K=0.00000e+000 A4=-1.67837e-005 A6=-3.64843e-008 A8=1.07618e-009 A10=-1.24350e-011 A12=7.09601e-014

[0183] Surface 23

[0184] K=0.00000e+000 A4=1.93177e-005 A6=-1.27575e-007 A8=6.12378e-010A10=-8.15372e-012 A12=4.33482e-014

[0185] Surface 26

[0186] K=0.00000e+000 A4=2.55101e-005 A6=-2.64846e-007 A8=-4.54960e-010A10=8.83199e-012 A12=-3.33076e-014

[0187] Surface 27

[0188] K=0.00000e+000 A4=3.69079e-005 A6=-2.56285e-007 A8=4.52183e-010A10=1.47250e-012 A12=-6.14678e-015

[0189] Various data

[0190]

[0191]

[0192] Zoom lens unit data

[0193]

[0194] [Numerical Example 4]

[0195] Unit: mm

[0196] Surface data

[0197]

[0198]

[0199] Aspheric surface data

[0200] Surface 3

[0201] K=0.00000e+000 A4=1.41959e-005 A6=-7.81904e-008 A8=3.46364e-010A10=-1.01509e-012 A12=1.45953e-015 A14=-7.30050e-019

[0202] Surface 4

[0203] K=-6.36442e-001 A4=1.55368e-005 A6=-1.12080e-007 A8=5.29838e-010A10=-1.99889e-012 A12=2.59583e-015 A14=-2.64013e-019

[0204] Surface 22

[0205] K=0.00000e+000 A4=-6.99798e-006 A6=-1.13680e-008 A8=1.53877e-011A10=-1.10382e-013 A12=-4.97644e-016

[0206] Surface 23

[0207] K=0.00000e+000 A4=2.44559e-005 A6=-8.82874e-008 A8=1.95669e-010 A10=-1.85265e-013 A12=-1.18827e-015

[0208] Surface 27

[0209] K=0.00000e+000 A4=5.05507e-005 A6=-7.34842e-007 A8=4.77038e-009 A10=-1.90408e-011 A12=3.62227e-014

[0210] Surface 28

[0211] K=0.00000e+000 A4=5.77402e-005 A6=-6.55664e-007 A8=4.27445e-009 A10=-1.57305e-011 A12=2.69924e-014

[0212] Various data

[0213]

[0214]

[0215] Zoom lens unit data

[0216]

[0217] [Numerical Example 5]

[0218] Unit: mm

[0219] Surface data

[0220]

[0221]

[0222]

[0223] Aspheric surface data

[0224] Surface 3

[0225] K=0.00000e+000 A4=6.47302e-005 A6=-2.29202e-007 A8=5.86104e-010A10=-1.05964e-012 A12=1.37744e-015 A14=-8.86881e-019

[0226] Surface 4

[0227] K=-7.50843e-001 A4=7.46936e-005 A6=-1.82700e-007 A8=-2.68916e-010A10=2.54737e-012 A12=-5.55262e-015 A14=3.33412e-018

[0228] Surface 25

[0229] K=0.00000e+000 A4=-2.23064e-005 A6=-6.28235e-008 A8=7.24431e-011A10=-1.42742e-012 A12=-7.58488e-016

[0230] Surface 30

[0231] K=0.00000e+000 A4=3.94581e-005 A6=6.47504e-008 A8=-2.02428e-010A10=4.29810e-014 A12=3.69126e-015

[0232] Various data

[0233]

[0234]

[0235] Zoom lens unit data

[0236]

[0237] [Numerical Example 6]

[0238] Unit: mm

[0239] Surface data

[0240]

[0241]

[0242]

[0243] Aspheric surface data

[0244] Surface 3

[0245] K=0.00000e+000 A4=4.47960e-005 A6=-3.48481e-007 A8=1.44040e-009 A10=-3.42659e-012 A12=4.42059e-015 A14=-2.38393e-018

[0246] Surface 4

[0247] K=-6.48193e-001 A4=5.35870e-005 A6=-3.21360e-007 A8=-3.48686e-010A10=1.17717e-011 A12=-5.28294e-014 A14=7.55482e-017

[0248] Surface 23

[0249] K=0.00000e+000 A4=-4.71833e-005 A6=-8.44077e-008 A8=1.47111e-009 A10=-1.06774e-011 A12=7.11865e-014

[0250] Surface 24

[0251] K=0.00000e+000 A4=-7.69334e-006 A6=-6.90014e-008 A8=1.57448e-009 A10=-1.47829e-011 A12=8.11251e-014

[0252] Surface 27

[0253] K=0.00000e+000 A4=1.74890e-006 A6=-3.81796e-009 A8=1.07601e-009 A10=-1.19626e-011 A12=2.22566e-014

[0254] Surface 28

[0255] K=0.00000e+000 A4=9.96899e-006 A6=-2.31241e-008 A8=1.03976e-009 A10=-1.09841e-011 A12=2.47861e-014

[0256] Various data

[0257]

[0258] Zoom lens unit data

[0259]

[0260] [Numerical Example 7]

[0261] Unit: mm

[0262] Surface data

[0263]

[0264]

[0265] Aspheric surface data

[0266] Surface 3

[0267] K=0.00000e+000 A4=7.28829e-005 A6=-3.12387e-007 A8=1.01671e-009A10=-2.11222e-012 A12=2.79184e-015 A14=-1.84122e-018

[0268] Surface 4

[0269] K=-5.56940e-001 A4=8.13645e-005 A6=-2.68703e-007 A8=-1.48487e-010A10=4.94390e-012 A12=-1.70106e-014 A14=1.68710e-017

[0270] Surface 25

[0271] K=0.00000e+000 A4=-2.30258e-005 A6=-6.54896e-008 A8=1.46618e-010A10=-1.94958e-012 A12=6.26213e-015

[0272] Surface 30

[0273] K=0.00000e+000 A4=4.62125e-005 A6=1.37240e-008 A8=4.45799e-010A10=-4.84100e-012 A12=1.52924e-014

[0274] Various data

[0275]

[0276] Zoom lens unit data

[0277]

[0278] Table 1 summarizes the various values ​​in the various numerical examples.

[0279] Table 1

[0280]

[0281] Camera equipment

[0282] Reference Fig. 22 , a description will be given of an example in which the zoom lens L0 according to each example is used for a digital still camera (imaging apparatus) of an imaging optical system. Fig. 22, reference numeral 10 denotes a camera body, and reference numeral 11 denotes an imaging optical system included in any one of the zoom lenses L0 according to Examples 1 to 7. Reference numeral 12 denotes a solid-state image sensor (photoelectric conversion element) such as a CCD sensor and a CMOS sensor, which is built into the camera body, receives an optical image formed by the imaging optical system 11, and performs photoelectric conversion. The camera body 10 may be a so-called single-lens reflex camera having a quick-flip mirror, or a so-called mirrorless camera having no quick-flip mirror.

[0283] Therefore, the zoom lens L0 according to the various examples applied to an image pickup apparatus such as a digital still camera or the like can provide an image pickup apparatus with a compact lens.

[0284] Each example can provide a zoom lens and an image pickup apparatus having the zoom lens that can maintain high optical performance while stabilizing the image while achieving both a wide angle of view and miniaturization.

[0285] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A zoom lens comprising, in order from the object side to the image side, a first lens unit having negative refractive power and a rear unit having positive refractive power as a whole, in, The distance between the first lens unit and the rear unit changes during zooming, characterised in that the rear unit comprises a subunit which moves during image stabilisation in a direction having a component of a direction perpendicular to the optical axis, wherein the first lens unit includes three or more negative lenses in order from the object side to the image side, and Among them, the following inequality is satisfied: -20 <Dist_w<-8 -0.4 <f1 / fLN<0.7 -2.2 <f1 / skw<-1.21 0.1 <dLIS / dR<10.0 Wherein, Dist_w is the distortion amount at the maximum image height in the infinity focus state at the wide-angle end, f1 is the focal length of the first lens unit, fLN is the focal length of the final lens unit closest to the image plane, skw is the back focal length of the zoom lens at the wide-angle end, dLIS is the distance on the optical axis from the lens surface closest to the object in the subunit to the lens surface closest to the image plane in the subunit, and dR is the distance on the optical axis at the wide-angle end from the lens surface closest to the image plane in the subunit to the lens surface closest to the object in the lens unit adjacent to the subunit and arranged on the image side of the subunit.

2. The zoom lens according to claim 1, It is characterized in that Satisfies the following inequality: 1.0<|fLIS / ft|<4.0 Wherein, fLIS is the focal length of the subunit, and ft is the focal length of the zoom lens at the telephoto end.

3. The zoom lens according to claim 1, It is characterized in that Satisfies the following inequality: 0.00≤dIS / dt<0.25 Here, dIS is the distance on the optical axis from the lens surface closest to the object in the rear unit to the lens surface closest to the object in the subunit at the telephoto end, and dt is the total lens length of the zoom lens at the telephoto end.

4. The zoom lens according to claim 1, It is characterized in that Satisfies the following inequality: 30<νLIS<70 where νLIS is the Abbe number of the lens with the shortest focal length in the subunit.

5. The zoom lens according to claim 1, It is characterized in that Satisfies the following inequality: -1.0<(r1+r2) / (r1-r2)<0.6 Wherein, r1 is the radius of curvature of the lens surface in the subunit closest to the object, and r2 is the radius of curvature of the lens surface in the subunit closest to the image plane.

6. The zoom lens according to claim 1, It is characterized in that Satisfies the following inequality: -2.2 <f1 / fw<-1.0 Wherein, fw is the focal length of the zoom lens at the wide-angle end.

7. The zoom lens according to claim 1, It is characterized in that Satisfies the following inequality: -0.5 <fw / fLN<0.3 Wherein, fw is the focal length of the zoom lens at the wide-angle end.

8. The zoom lens according to claim 1, It is characterized in that Satisfies the following inequality: -1.5 <Ymax_w / f1<-0.5 Among them, Ymax_w is the maximum image height at the wide-angle end.

9. The zoom lens according to claim 1, It is characterized in that The subunit includes a positive lens and a negative lens.

10. The zoom lens according to claim 1, It is characterized in that The rear unit includes two or more lens units arranged on the image side of the sub-unit, and a distance between the two or more lens units changes during zooming.

11. The zoom lens according to claim 1, It is characterized in that The rear unit includes a focusing unit arranged on an image side of the subunit, and the focusing unit is configured to move during focusing.

12. The zoom lens according to claim 1, It is characterized in that At the wide-angle end, among distances between lens units included in the zoom lens, a distance between the first lens unit and the rear unit is largest.

13. The zoom lens according to claim 1, It is characterized in that The first lens unit includes a positive lens.

14. The zoom lens according to any one of claims 1 to 13, It is characterized in that The rear unit includes, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having negative refractive power, a fourth lens unit having negative refractive power, and a fifth lens unit having positive refractive power.

15. The zoom lens according to any one of claims 1 to 13, It is characterized in that The rear unit includes, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having negative refractive power, a fourth lens unit having positive refractive power, a fifth lens unit having negative refractive power, and a sixth lens unit having positive refractive power.

16. The zoom lens according to any one of claims 1 to 13, It is characterized in that The rear unit includes, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having positive refractive power, a fourth lens unit having negative refractive power, a fifth lens unit having negative refractive power, and a sixth lens unit having positive refractive power.

17. The zoom lens according to any one of claims 1 to 13, It is characterized in that The rear unit includes, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having negative refractive power, a fourth lens unit having positive refractive power, a fifth lens unit having negative refractive power, a sixth lens unit having negative refractive power, and a seventh lens unit having positive refractive power.

18. A zoom lens comprising, in order from the object side to the image side, a first lens unit having negative refractive power and a rear unit having positive refractive power as a whole, It is characterized in that the rear unit is composed of, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having negative refractive power, a fourth lens unit having negative refractive power, and a fifth lens unit having positive refractive power, and a distance between adjacent lens units changes during zooming, wherein the rear unit comprises a subunit which moves during image stabilization in a direction having a component of a direction perpendicular to the optical axis, wherein the first lens unit includes three or more negative lenses in order from the object side to the image side, and Among them, the following inequality is satisfied: -20 <Dist_w<-8 -0.4 <f1 / fLN<0.7 -2.2 <f1 / skw<-1.0 Wherein, Dist_w is the distortion amount at the maximum image height in the infinite focus state at the wide-angle end, f1 is the focal length of the first lens unit, fLN is the focal length of the final lens unit closest to the image plane, and skw is the back focal length of the zoom lens at the wide-angle end.

19. A zoom lens comprising, in order from the object side to the image side, a first lens unit having negative refractive power and a rear unit having positive refractive power as a whole, It is characterized in that the rear unit is composed of, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having negative refractive power, a fourth lens unit having positive refractive power, a fifth lens unit having negative refractive power, and a sixth lens unit having positive refractive power, and a distance between adjacent lens units changes during zooming, wherein the rear unit comprises a subunit which moves during image stabilization in a direction having a component of a direction perpendicular to the optical axis, wherein the first lens unit includes three or more negative lenses in order from the object side to the image side, and Among them, the following inequality is satisfied: -20 <Dist_w<-8 -0.4 <f1 / fLN<0.7 -2.2 <f1 / skw<-1.0 Wherein, Dist_w is the distortion amount at the maximum image height in the infinite focus state at the wide-angle end, f1 is the focal length of the first lens unit, fLN is the focal length of the final lens unit closest to the image plane, and skw is the back focal length of the zoom lens at the wide-angle end.

20. A zoom lens comprising, in order from the object side to the image side, a first lens unit having negative refractive power and a rear unit having positive refractive power as a whole, It is characterized in that the rear unit is composed of, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having positive refractive power, a fourth lens unit having negative refractive power, a fifth lens unit having negative refractive power, and a sixth lens unit having positive refractive power, and a distance between adjacent lens units changes during zooming, wherein the rear unit comprises a subunit which moves during image stabilization in a direction having a component of a direction perpendicular to the optical axis, wherein the first lens unit includes three or more negative lenses in order from the object side to the image side, and Among them, the following inequality is satisfied: -20 <Dist_w<-8 -0.4 <f1 / fLN<0.7 -2.2 <f1 / skw<-1.0 Wherein, Dist_w is the distortion amount at the maximum image height in the infinite focus state at the wide-angle end, f1 is the focal length of the first lens unit, fLN is the focal length of the final lens unit closest to the image plane, and skw is the back focal length of the zoom lens at the wide-angle end.

21. A zoom lens comprising, in order from the object side to the image side, a first lens unit having negative refractive power and a rear unit having positive refractive power as a whole, It is characterized in that the rear unit is composed of, in order from the object side to the image side, a second lens unit having positive refractive power, a third lens unit having negative refractive power, a fourth lens unit having positive refractive power, a fifth lens unit having negative refractive power, a sixth lens unit having negative refractive power, and a seventh lens unit having positive refractive power, and a distance between adjacent lens units changes during zooming, wherein the rear unit comprises a subunit which moves during image stabilization in a direction having a component of a direction perpendicular to the optical axis, wherein the first lens unit includes three or more negative lenses in order from the object side to the image side, and Among them, the following inequality is satisfied: -20 <Dist_w<-8 -0.4 <f1 / fLN<0.7 -2.2 <f1 / skw<-1.0 Wherein, Dist_w is the distortion amount at the maximum image height in the infinite focus state at the wide-angle end, f1 is the focal length of the first lens unit, fLN is the focal length of the final lens unit closest to the image plane, and skw is the back focal length of the zoom lens at the wide-angle end.

22. A camera device, include: The zoom lens according to any one of claims 1 to 21; as well as An image sensor is configured to receive an image formed by the zoom lens.

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