Optical system, lens device, and imaging device

Abstract

To satisfactorily correct image blurs in both the central area and the peripheral area of an image.SOLUTION: An optical system L0 is used for an imaging device that performs vibration isolation operation by moving an imaging element that images a subject or by moving a cut-out area in an image generated using a signal from the imaging element. The optical system has a vibration-isolated lens group LA that is rotatable so as to tilt relative to an optical axis.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an optical system used for imaging. [Background technology]

[0002] In imaging, image blur caused by camera shake or the like is reduced (corrected) by moving (shifting) part of the optical system or the image sensor relative to the optical axis, or by moving the area cut out from the generated image. However, even if image blur can be sufficiently corrected in the central area of ​​the image, there are cases where the peripheral area is left uncorrected or overcorrected.

[0003] Patent Document 1 discloses a method for correcting image blur in both the central and peripheral regions of an image by shifting both a part of an optical system and an image sensor relative to the optical axis. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-149033 Summary of the Invention [Problem to be solved by the invention]

[0005] However, even if the method disclosed in Patent Document 1 is used, there is a risk that image blur in the peripheral region may remain uncorrected or may be overcorrected.

[0006] The present invention provides an optical system that can effectively correct image blur in both the central and peripheral areas of an image, a lens device having the same, and an imaging device. [Means for solving the problem]

[0007] An optical system according to one aspect of the present invention is used in an imaging device that performs image stabilization by moving an image sensor that captures an image of a subject or by moving a cutout area in an image generated using a signal from the image sensor. The optical system is characterized by having an image stabilization lens group that rotates so as to tilt with respect to an optical axis. Note that a lens device or an imaging device that includes the optical system also constitutes another aspect of the present invention. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an optical system that can effectively correct image blur in both the central and peripheral areas of an image in combination with the vibration isolation operation of the imaging device. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view of an optical system according to a first embodiment. [Figure 2] FIG. 4 is a longitudinal aberration diagram of the optical system of Example 1. [Figure 3] 4A to 4C are diagrams showing lateral aberrations of the optical system of Example 1. [Figure 4] 4A to 4C are diagrams showing lateral aberrations of the optical system of Example 1 when vibration reduction is performed. [Figure 5] FIG. 10 is a cross-sectional view of the optical system of the second embodiment. [Figure 6] 10A and 10B are longitudinal aberration diagrams of the optical system of Example 2. [Figure 7] 4A to 4C are diagrams showing lateral aberrations of the optical system of Example 2. [Figure 8] 10A and 10B are diagrams showing lateral aberrations of the optical system of Example 2 when vibration is reduced. [Figure 9] FIG. 10 is a cross-sectional view of the optical system of the third embodiment. [Figure 10] 10A and 10B are longitudinal aberration diagrams of the optical system of Example 3. [Figure 11] 10A to 10C are diagrams showing lateral aberrations of the optical system of Example 3. [Figure 12] 10A and 10B are diagrams showing lateral aberrations of the optical system of Example 3 when vibration reduction is performed. [Figure 13] FIG. 10 is a cross-sectional view of the optical system of Example 4. [Figure 14] 10A and 10B are longitudinal aberration diagrams of the optical system of Example 4. [Figure 15] 10A to 10C are diagrams showing lateral aberrations of the optical system of Example 4. [Figure 16] 10A and 10B are diagrams showing lateral aberrations of the optical system of Example 4 when vibration is reduced. [Figure 17] FIG. 10 is a cross-sectional view of an optical system according to a fifth embodiment. [Figure 18] 10A and 10B are longitudinal aberration diagrams of the optical system of Example 5. [Figure 19] 10A to 10C are lateral aberration diagrams of the optical system of Example 5. [Figure 20] 10A to 10C are diagrams showing lateral aberrations of the optical system of Example 5 when vibration reduction is performed. [Figure 21] FIG. 10 is a cross-sectional view of an optical system according to a sixth embodiment. [Figure 22] 13A to 13C are longitudinal aberration diagrams of the optical system of Example 6. [Figure 23] 13A to 13C are diagrams showing lateral aberrations of the optical system of Example 6. [Figure 24] 13A to 13C are diagrams showing lateral aberrations of the optical system of Example 6 when vibration is reduced. [Figure 25] FIG. 13 is a cross-sectional view of the optical system of Example 7. [Figure 26] 13A and 13B are longitudinal aberration diagrams of the optical system of Example 7. [Figure 27] 10A to 10C are diagrams showing lateral aberrations of the optical system of Example 7. [Figure 28] 13A to 13C are diagrams showing lateral aberrations of the optical system of Example 7 when vibration reduction is performed. [Figure 29] FIG. 10 is a diagram showing image point movement in response to rotational shake around the Y axis. [Figure 30] FIG. 4 is a diagram showing an image point movement during lens shift. [Figure 31] FIG. 10 is a diagram showing the movement of an image point when the lens is tilted. [Figure 32] FIG. 10 is a diagram showing the movement of an image point when the sensor is shifted. [Figure 33] FIG. 1 is a schematic diagram of a lens device having the optical system of Examples 1 to 7. [Figure 34] FIG. 1 is a schematic diagram of an imaging device equipped with the optical system of Examples 1 to 7. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] 1, 5, 9, 13, 17, 21, and 25 show cross sections of the optical system L0 of Examples 1 to 7 when the optical system is focused on an object at infinity (hereinafter referred to as the infinity focused state). The optical system L0 of each Example is used in various imaging devices such as digital video cameras, digital still cameras, silver halide film cameras, broadcast cameras, and surveillance cameras.

[0012] In each figure, the left side is the object side and the right side is the image side. The optical system L0 in each embodiment is composed of multiple lens groups Li (i indicates the order when counted from the object side) and an aperture stop SP. In each embodiment, the lens group is a group of one or more lenses separated before and after the aperture stop SP, or a group of one or more lenses that may or may not move together (tilt or shift) during image shake correction (anti-vibration). The lens group may include the aperture stop SP. IP is the image plane. The imaging surface of an imaging element (photoelectric conversion element) such as a CCD sensor or CMOS sensor is arranged on the image plane IP.

[0013] Figure 29 shows the movement of the image point on the image plane IP when rotational shake around the Y axis occurs as camera shake. The Y axis in the figure is an axis that passes through the center of the imaging plane and is parallel to the short side of the imaging plane, and the X axis is an axis that passes through the center of the imaging plane and is parallel to the long side of the imaging plane.

[0014] As shown in this diagram, image blur caused by rotational shake around the Y axis distorts the original rectangular subject image 11 before image blur into a trapezoidal subject image 12. When distortion aberration is optically corrected in a wide-angle optical system using the central projection method, such as optical system L0 in each embodiment, image blur caused by rotational shake results in significant trapezoidal distortion, as seen in subject image 12. Image blur occurs when each image point on the imaging surface moves according to the image point movement vector indicated by the arrow in the diagram. At the center of the imaging surface, image blur occurs in the X-axis direction.

[0015] Figures 30, 31, and 32 respectively show image point movement when image stabilization is performed by shifting the lens group included in the optical system in a direction perpendicular to the optical axis (lens shift), tilting the lens group relative to the optical axis (lens tilt), and shifting the image sensor in a direction perpendicular to the optical axis (sensor shift).All of these figures show image point movement when image stabilization is performed so as to satisfactorily correct the image blur at the center of the imaging surface shown in Figure 29.

[0016] 30, when the lens shift is performed, the image point moves in at least one direction and amount differently on the Y axis and at the four corners of the image plane compared to the image point movement at the center of the image plane and at the peripheral image height on the X axis. As a result, rectangular subject image 11 is distorted into trapezoidal subject image 13.

[0017] 31, when the lens is tilted, the image point does not move on the Y axis, but moves in a direction and / or amount that differs on the X axis and at the peripheral image heights of the four corners. As a result, rectangular subject image 11 is distorted into trapezoidal subject image 13'.

[0018] As shown in FIG. 32, when the sensor is shifted, the image point moves uniformly (in the same direction and by the same amount) at all peripheral image heights, including the center of the imaging surface, on the X axis, on the Y axis, and at the four corners. As a result, rectangular object image 11 changes into object image 13" which has been translated in parallel.

[0019] In the optical system L0 of each embodiment, when a sensor shift is performed as an image stabilization operation to correct image blur in the central and peripheral regions of the imaging device, a lens tilt suitable for image blur correction in the peripheral region is performed. This makes it possible to suppress undercorrection and overcorrection that tend to occur in the peripheral region with sensor shift alone, and to effectively correct image blur in both the central and peripheral regions. Note that instead of sensor shift, the imaging device may perform image processing as an image stabilization operation, which moves (shifts) a cropped region from an image generated by a signal from the imaging element.

[0020] Next, the characteristic configuration of the optical system L0 of each embodiment will be described. The optical system L0 of each embodiment is intended for use in an imaging device that performs sensor shift or image processing as an image stabilization operation, and has an image stabilization lens group LA that rotates (tilts) so as to be inclined with respect to the optical axis of the optical system L0 (or a plane perpendicular to the optical axis). Specifically, the image stabilization lens group LA rotates around a point on or near the optical axis. By tilting the image stabilization lens group LA in conjunction with the image stabilization operation of the imaging device, image blur can be effectively corrected not only in the central region but also in the peripheral region, as described above.

[0021] Preferably, the vibration-reduction lens group LA is configured with one single lens or one cemented lens, which makes it possible to make the vibration-reduction lens group LA small and lightweight and avoid an increase in the size of the actuator when tilting the vibration-reduction lens group LA with an actuator.

[0022] Furthermore, a plurality of vibration-proof lens groups LA may be arranged within the optical system L0.

[0023] Furthermore, it is preferable that the optical system L0 in each embodiment satisfy at least one of the conditions in the following formulas (1) to (7). In formulas (1) to (7), fis is the focal length of the image stabilization lens group LA, f is the focal length of the entire optical system L0, and tis is the distance on the optical axis from the aperture stop SP to the lens surface in the image stabilization lens group LA that is closest to the aperture stop. Dis is the distance on the optical axis from the lens surface in the image stabilization lens group LA that is closest to the object to the center of rotation of the image stabilization lens group LA. Da is the length from the lens surface in the image stabilization lens group LA that is closest to the object to the lens surface in the image stabilization lens group LA that is closest to the image, and D is the length on the optical axis from the lens surface in the image stabilization lens group LA that is closest to the object to the image plane IP. Dbf is the length on the optical axis from the lens surface in the image stabilization lens group L0 that is closest to the image plane IP. ymax is the maximum image height of the optical system L0.

[0024] 8.45≦|fis| / f≦30.00 (1) 1.3≦|tis| / f≦6.0 (2) 0<|dis| / f≦0.51 (3) 0 <Da / D≦0.06 (4) 0.75≦Dbf / f≦1.30 (5) 0 <Da / |fis|≦0.03 (6) 0.8≦ymax / f≦1.8 (7) The condition of formula (1) indicates the appropriate relationship between the focal length fis of the image stabilization lens group LA and the focal length f of the optical system L0. If the focal length fis of the image stabilization lens group LA becomes long (refractive power becomes small) so that |fis| / f exceeds the upper limit of formula (1), the effect of image blur correction in the peripheral area for tilt and shift components due to tilt of the image stabilization lens group LA becomes small. As a result, the tilt angle of the image stabilization lens group LA required to perform good image blur correction in the peripheral area increases, and decentering aberrations such as decentering coma and image surface tilt increase, which is undesirable. If the focal length fis of the image stabilization lens group LA becomes short (refractive power becomes large) so that |fis| / f falls below the lower limit of formula (1), overcorrection of image blur occurs in the peripheral area, making it impossible to achieve high image blur correction performance, which is undesirable.

[0025] The condition of equation (2) shows the appropriate relationship between the distance tis from the aperture diaphragm SP to the image stabilization lens group LA and the focal length f of the optical system L0. If the image stabilization lens group LA is farther away from the aperture diaphragm SP so that |tis| / f exceeds the upper limit of equation (2), the size and weight of the image stabilization lens group LA increase, making it difficult to drive, which is undesirable. If the image stabilization lens group LA is closer to the aperture diaphragm SP so that |tis| / f falls below the lower limit of equation (2), the position at which the off-axial light beam is refracted in the image stabilization lens group LA becomes lower, making it difficult to adjust the distortion, which is also undesirable.

[0026] The condition in equation (3) indicates the appropriate relationship between the distance dis from the lens surface closest to the object in the image stabilization lens group LA to the center of rotation and the focal length f of the optical system L0. If the distance dis is increased so that |dis| / f exceeds the upper limit of equation (3), the proportion of the shift component in the tilt of the image stabilization lens group LA increases. This results in over-correction of image blur in the peripheral area, making it impossible to achieve high image stabilization performance in the peripheral area, which is undesirable.

[0027] However, the vibration-reduction lens group LA may be configured to be shifted in a direction perpendicular to the optical axis with or without tilting.Furthermore, the center of rotation of the vibration-reduction lens LA when tilting may be moved (adjusted).

[0028] The condition of equation (4) shows the appropriate relationship between the thickness Da of the vibration-reduction lens group LA and the total optical length D of the optical system L0. If the thickness Da of the vibration-reduction lens group LA becomes too large so that Da / D exceeds the upper limit of equation (4), the structure for tilting the vibration-reduction lens group LA will become large, which is not preferable.

[0029] The condition of formula (5) indicates an appropriate relationship between the back focal length Dbf of the optical system L0 and the focal length f of the optical system L0. If the back focal length Dbf is long enough that Dbf / f exceeds the upper limit of formula (5), it becomes difficult to shorten the overall optical length of the optical system L0 (reducing the size of the optical system L0), which is undesirable. If the back focal length Dbf is short enough that Dbf / f falls below the lower limit of formula (5), it becomes difficult to mechanically connect the lens device including the optical system L0 to the imaging device, which is undesirable.

[0030] The condition of equation (6) shows the appropriate relationship between the thickness Da of the image stabilization lens group LA and the focal length fis of the image stabilization lens group LA. If the focal length fis of the image stabilization lens group LA becomes short so that Da / |fis| exceeds the upper limit of equation (6), overcorrection occurs in the peripheral area, making it impossible to obtain high image stabilization performance in the peripheral area, which is not desirable.

[0031] The condition of equation (7) indicates an appropriate relationship between the maximum image height ymax of the optical system L0 and the focal length f of the optical system L0. If the maximum image height ymax becomes so high that ymax / f exceeds the upper limit of equation (7), light rays from a wider angle of view than the required angle of view will be imaged on the imaging surface, which is undesirable because the optical system L0 and the imaging device will become larger. If the maximum image height ymax becomes so low that ymax / f falls below the lower limit of equation (7), only light rays from an angle of view narrower than the required angle of view will be imaged on the imaging surface, which is undesirable.

[0032] It is more preferable that the numerical ranges of the formulas (1) to (7) are as follows:

[0033] 8.50≦|fis| / f≦28.00 (1a) 1.35≦|tis| / f≦5.50 (2a) 0.010≦|dis| / f≦0.508 (3a) 0.002≦Da / D≦0.055 (4a) 0.78≦Dbf / f≦1.27 (5a) 0.003≦Da / |fis|≦0.028 (6a) 0.82≦ymax / f≦1.78 (7a) Furthermore, it is more preferable that the numerical ranges of the formulas (1) to (7) are as follows:

[0034] 8.60≦|fis| / f≦25.00 (1b) 1.4≦|tis| / f≦5.0 (2b) 0.020≦|dis| / f≦0.505 (3b) 0.003≦Da / D≦0.050 (4b) 0.80≦Dbf / f≦1.25 (5b) 0.005≦Da / |fis|≦0.026 (6b) 0.84≦ymax / f≦1.75 (7b) 33 shows a lens device 10 having an optical system L0 according to each embodiment, and an imaging device 15 to which the lens device 10 is detachably attached. The lens device 10 has an actuator 11 that tilts the vibration-proof lens group LA, and a control unit 12 that controls the actuator. The imaging device 15 has an image sensor 16.

[0035] For example, when the image capture device 15 performs the above-described image stabilization operation, the control unit 12 of the lens device 10 controls the actuator 11 in response to a command from the image capture device 15 to tilt the image stabilization lens group LA. The command from the image capture device 15 to the control unit 12 includes information such as the tilt amount of the image stabilization lens group LA calculated based on parameters (such as the sensor shift amount and the shift amount of the cropped area) of the image stabilization operation performed by the image capture device 15. The control unit 12 may also obtain parameters of the image stabilization operation performed by the image capture device 15 from the image capture device 15, calculate the tilt amount of the image stabilization lens group LA, and control the actuator 11 based on the calculation results.

[0036] The lens device also preferably has a storage unit 13 that stores distortion correction data for correcting distortion in an image generated in the imaging device using a signal from the imaging element. The distortion correction data corresponds to each optical system L0. The imaging device can correct distortion in the image through image processing using the distortion correction data acquired from the lens device. The imaging device may also acquire distortion correction data from another server (including a server on the cloud) via a network. This allows aberrations other than distortion in the optical system L0 to be suppressed, while distortion can be corrected through image processing.

[0037] Furthermore, an imaging device that has the optical system L0 of each embodiment as an integral part or detachable may control the tilt drive of the vibration reduction lens group LA when performing vibration reduction operation.

[0038] Next, the optical systems L0 of Examples 1 to 7 will be specifically described.

[0039] 1 is composed of a first lens group L1, a second lens group L2, an aperture stop SP, and a third lens group L3, arranged in this order from the object side to the image side. The second lens group L2 serves as an image stabilizing lens group LA and is capable of tilting around a point C on (or near) the optical axis.

[0040] The optical systems L0 of Examples 2, 4, 5, and 7 shown in Figures 5, 13, 17, and 25, respectively, are composed of a first lens group L1, an aperture stop SP, a second lens group L2, and a third lens group L3, arranged in this order from the object side to the image side. The third lens group L3 serves as an image stabilizing lens group LA and is capable of tilting around a point C on (or in the vicinity of) the optical axis.

[0041] 9, the optical system L0 of Example 3 is composed of, arranged in order from the object side to the image side, a first lens unit L1, a second lens unit L2 including an aperture stop SP closest to the object side, and a third lens unit L3. The third lens unit L3 serves as an image stabilizing lens unit LA and can be tilted around a point C on (or near) the optical axis.

[0042] 21 shows an optical system L0 of Example 6, which is composed of, arranged in order from the object side to the image side, a first lens group L1, a second lens group L2, a third lens group L3, an aperture stop SP, and a fourth lens group L4. The second lens group L2 serves as an image stabilizing lens group LA and is capable of tilting around a point C on (or near) the optical axis.

[0043] Numerical Examples 1 to 7 corresponding to Examples 1 to 7, respectively, are shown below. In the surface data of each numerical example, surface number m indicates the order of the surface when counted from the object side, r (mm) indicates the radius of curvature of the mth surface, and d (mm) indicates the distance on the optical axis between the mth surface and the (m+1)th surface (surface spacing). Furthermore, nd indicates the refractive index at the d-line (wavelength 587.56 nm) of the optical material between the mth surface and the (m+1)th surface, and vd indicates the Abbe number of the optical member referenced to the d-line. The Abbe number vd referenced to the d-line is given by Nd, NF, and NC, respectively, where Nd, NF, and NC are the refractive indices at the d-line (wavelength 587.56 nm), F-line (wavelength 486.13 nm), and C-line (wavelength 656.27 nm), respectively. νd=(Nd-1) / (NF-NC) The effective diameter is the radius (mm) of the area on the mth surface through which light rays that contribute to image formation pass.

[0044] The surface spacing d (mm), focal length (mm) in various data, F-number, and half angle of view (°) calculated by paraxial calculation are all values ​​when focused at infinity.

[0045] The back focal length BF (Dbf in equation (5)) is the distance on the optical axis from the lens surface closest to the image (final surface) of the optical system to the paraxial image plane, expressed as an air-equivalent length. The total lens length (total optical length D in equation (4)) is the distance on the optical axis from the lens surface closest to the object (foreground surface) of the optical system to the final surface, plus the back focal length BF.

[0046] An asterisk (*) next to a surface number indicates that the surface has an aspherical shape. The aspherical shape is expressed by the following equation, where x is the displacement from the vertex of the surface in the optical axis direction, h is the height from the optical axis in a direction perpendicular to the optical axis, the direction of light propagation is positive, R is the paraxial radius of curvature, K is the conic constant, and A4, A6, A8, A10, and A12 are aspherical coefficients.

[0047] 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 +A14×h 14 In addition, "e±XX" in the conic constant and aspherical coefficient is expressed as "×10 ±XX " means.

[0048] Additionally, as image stabilization lens group data, various data related to the image stabilization lens group LA when focused at infinity is shown. The tilt component indicates the tilt angle with respect to the optical axis of the image stabilization lens group LA when correcting image blur at a correction angle of 0.4° (a state in which the optical system L0 is tilted 0.4° from the front principal point on the optical axis). The rotation center indicates the distance on the optical axis from the lens surface of the image stabilization lens group LA closest to the object to the rotation center (dis in equation (3)). The sensor shift amount indicates the shift amount of the image sensor relative to the tilt angle of the image stabilization lens group LA.

[0049] 2, 6, 10, 14, 18, 22, and 26 respectively show longitudinal aberrations (spherical aberration, astigmatism, distortion, and chromatic aberration) of the optical system L0 of Numerical Examples 1 to 7. In the spherical aberration diagrams, Fno indicates the F-number, the solid line indicates spherical aberration at the d-line (wavelength 587.6 nm), and the two-dot chain line indicates spherical aberration at the g-line (wavelength 435.8 nm). In the astigmatism diagrams, the solid line S indicates astigmatism at the sagittal image plane, and the dashed line M indicates astigmatism at the meridional image plane. The distortion diagrams show distortion at the d-line. The chromatic aberration diagrams show chromatic aberration of magnification at the g-line. ω is the half angle of view (°) calculated by paraxial calculation.

[0050] FIGS. 3, 7, 11, 15, 19, 23, and 27 show the lateral aberration of the optical system L0 of Numerical Examples 1 to 7, respectively. FIGS. 4, 8, 12, 16, 20, 24, and 28 show the lateral aberration during image stabilization (when the image stabilization lens unit LA is tilted) when the optical system L0 of Numerical Examples 1 to 7 is tilted by 0.4° with respect to the front principal point on the optical axis. From top to bottom, the figures show the aberrations for the d-line and g-line at 100%, 80%, 70%, and 50% of the image height and at the center. The dashed line shows the aberration at the sagittal image plane for the d-line, the solid line shows the aberration at the meridional image plane for the d-line, and the chain double-dashed line shows the aberration at the meridional image plane for the g-line.

[0051] Furthermore, the values ​​of the formulas (1) to (7) for the optical systems L0 of Numerical Examples 1 to 7 are summarized in Table 1. The optical systems L0 of the respective Numerical Examples satisfy all of the conditions of the formulas (1) to (7). [Numerical Example 1] Unit: mm Surface Data Surface number rd nd νd Effective diameter 1* 36.479 1.51 1.58313 59.4 61.65 2* 17.975 7.18 47.14 3 46.795 1.22 1.65160 58.5 46.59 4 26.752 7.28 39.59 5 65.135 1.82 1.49700 81.5 37.47 6 21.676 9.93 30.71 7 -68.164 1.00 1.43875 94.7 28.83 8 24.432 3.41 1.88300 40.8 26.00 9 49.826 30.09 25.19 10 (Aperture) ∞ 1.88 9.19 11 27.174 2.14 1.51633 64.1 9.53 12 93.993 3.63 9.48 13 20.942 1.31 1.92119 24.0 9.55 14 10.172 3.07 1.65412 39.7 9.15 15 -105.385 2.03 9.55 16 -35.066 2.21 1.88300 40.8 10.46 17 12.538 3.00 1.92286 20.9 12.21 18 41.587 0.35 12.94 19 16.726 4.20 1.49700 81.5 14.90 20* -81.963 0.41 15.51 21 20.693 0.65 2.00100 29.1 16.40 22 11.132 9.00 1.49700 81.5 15.83 23 -21.399 1.10 17.24 24 16.899 2.18 1.64850 53.0 17.88 25 12.797 7.94 16.77 26* -34.500 1.02 1.85338 40.4 17.85 27* -111.072 1.03 19.91 28 101.481 1.39 1.49700 81.5 23.99 29 794.992 12.04 24.50 Image plane ∞ Aspheric data Front page K = 0.00000e+00 A 4=-5.76276e-06 A 6=-2.33526e-08 A 8= 5.19803e-11 A10=-5.68362e-14 A12= 3.25920e-17 A14=-8.43254e-21 2nd side K =-8.75943e-01 A 4= 3.61147e-06 A 6=-3.61112e-08 A 8=-7.92564e-11 A10= 3.80820e-13 A12=-4.78121e-16 A14= 2.03396e-19 Page 20 K = 0.00000e+00 A 4= 2.69457e-05 A 6= 9.62891e-09 A 8=-3.26028e-09 A10= 4.51333e-11 A12=-1.99041e-13 Page 26 K = 0.00000e+00 A 4=-1.88665e-04 A 6=-6.70269e-07 A 8= 6.85636e-09 A10=-9.60929e-11 A12= 8.62772e-13 Page 27 K = 0.00000e+00 A 4=-1.27339e-04 A 6= 4.90803e-08 A 8=-5.46075e-10 A10= 3.13522e-11 A12=-1.68209e-14 Various data Focal length 10.19 F-number 4.08 Half angle of view (°) 59.52 Image height 17.31 Lens length 124.01 BF 12.04 Anti-vibration lens group data First stop number 7 Last stop number 9 Focal length fis -178.788 mm Correction angle 0.400° Tilt component 1.416° Rotation center 3.565 mm Sensor shift amount -0.104 mm [Numerical Example 2] Unit: mm Surface Data Surface number rd nd νd Effective diameter 1* 27.962 3.40 1.60300 65.4 33.72 2* 13.836 6.47 24.37 3 75.664 1.49 1.43875 94.7 22.28 4 12.563 12.91 17.80 5 -32.360 2.49 1.65160 58.5 12.58 6 -15.133 0.10 13.22 7 -18.124 2.88 1.59522 67.7 13.24 8 -16.605 1.55 1.83400 37.2 14.07 9 -29.320 3.46 14.92 10 78.881 3.00 1.49700 81.5 16.33 11 -114.095 1.99 16.61 12 (Aperture) ∞ 2.42 16.86 13 19.796 2.07 1.90110 27.1 17.36 14 11.803 4.00 1.69895 30.1 16.09 15 26.921 2.28 15.61 16 -135.219 3.00 1.71300 53.9 15.62 17 -31.605 5.55 15.75 18 47.319 4.99 1.45860 90.2 15.54 19 -15.728 0.17 16.27 20 -16.105 1.00 1.90043 37.4 16.27 21 -68.180 2.49 1.43875 94.7 17.63 22 -23.231 15.26 18.35 23* -46.699 1.74 1.75500 52.3 25.51 24* -65.393 16.75 27.26 Image plane ∞ Aspheric data Front page K =-1.21516e+01 A 4= 4.07720e-05 A 6=-2.36233e-07 A 8= 5.83090e-10 A10=-2.50162e-13 A12=-9.08701e-16 2nd side K =-2.04612e+00 A 4= 4.23647e-05 A 6= 4.73871e-07 A 8=-7.14398e-09 A10=4.37490e-11 A12=-8.36011e-14 Page 23 K =-1.57755e+01 A 4=-1.49841e-04 A 6= 1.20221e-06 A 8=-8.76814e-09 A10=5.10644e-11 A12=-1.26245e-13 Page 24 K = 1.06851e+01 A 4=-9.72895e-05 A 6= 8.56295e-07 A 8=-4.81673e-09 A10=2.45587e-11 A12=-5.54178e-14 Various data Focal length 20.39 F-number 2.88 Half angle of view (°) 40.80 Image height 17.60 Lens length 101.46 BF 16.75 Anti-vibration lens group data Starting platform number 23 Ending platform number 24 Focal length fis -225.407 mm Correction angle 0.400° Tilt component 0.300° Pivot center -3.518 mm Sensor shift amount -0.139 mm [Numerical Example 3] Unit: mm Surface Data Surface number rd nd νd Effective diameter 1* 37.172 3.38 1.58313 59.4 69.28 2* 18.253 14.08 50.88 3 112.447 1.26 1.88300 40.8 50.57 4 24.158 3.02 37.76 5 30.338 1.00 1.49700 81.5 37.33 6 21.017 10.48 33.52 7 -107.278 1.00 1.43875 94.7 32.80 8 35.086 5.00 1.88300 40.8 30.29 9 2395.252 5.29 29.40 10 -79.798 1.87 1.90043 37.4 24.44 11 -138.047 24.51 23.59 12 (Aperture) ∞ 2.16 9.33 13 102.813 2.00 1.60342 38.0 9.64 14 -97.711 6.21 9.72 15 19.935 1.01 1.80518 25.4 9.83 16 9.407 3.42 1.65412 39.7 9.50 17 105.052 0.53 10.29 18 -52.469 1.23 1.90366 31.3 10.39 19 15.052 3.27 1.95906 17.5 11.56 20 47.155 0.43 12.57 21 19.608 5.18 1.49700 81.5 14.24 22* -32.288 0.11 15.40 23 18.458 1.00 2.05090 26.9 16.45 24 11.709 5.87 1.49700 81.5 15.74 25 -224.521 0.96 16.27 26 -86.871 4.05 1.49700 81.5 16.45 27 -31.004 0.41 17.20 28 28.028 1.35 2.00100 29.1 17.41 29 19.614 4.58 16.87 30* -30.751 2.00 1.85338 40.4 17.19 31* -339.190 1.50 20.96 32 -336.248 1.77 2.00100 29.1 23.23 33 -141.799 12.30 24.29 Image plane ∞ Aspheric data Front page K = 0.00000e+00 A 4= 3.74097e-06 A 6=-2.92679e-08 A 8= 5.19894e-11 A10=-5.43293e-14 A12= 3.15125e-17 A14=-8.62298e-21 2nd side K =-8.39318e-01 A 4= 1.20191e-05 A 6=-3.30108e-08 A 8=-4.66522e-11 A10= 2.80444e-13 A12=-4.40753e-16 A14= 2.14003e-19 Page 22 K = 0.00000e+00 A 4= 2.47333e-05 A 6=-1.08691e-07 A 8=-3.67618e-09 A10=8.32902e-11 A12=-5.61822e-13 Page 30 K = 0.00000e+00 A 4= 8.12166e-05 A 6=-2.58919e-06 A 8= 1.09833e-08 A10=-9.31076e-11 A12=-8.23007e-13 Page 31 K = 0.00000e+00 A 4= 1.52477e-04 A 6=-1.68489e-06 A 8= 4.19142e-09 A10=-1.43820e-11 A12= 8.41273e-14 Various data Focal length 10.16 F-number 4.08 Half angle of view (°) 59.57 Image height 17.30 Lens length 132.23 BF 12:30 Anti-vibration lens group data Starting platform number 32 Ending platform number 33 Focal length fis 243.849 mm Correction angle 0.400° Tilt component 2.870° Pivot center -5.083 mm Sensor shift amount -0.012 mm [Numerical Example 4] Unit: mm Surface Data Surface number rd nd νd Effective diameter 1* 23.259 1.00 1.90366 31.3 32.80 2* 10.108 7.81 24.46 3 -644.086 4.50 1.51742 52.4 24.25 4 -39.136 0.10 22.33 5 -53.039 1.56 1.43875 94.7 21.11 6 16.368 15.63 16.93 7 -41.585 2.50 1.72825 28.3 13.10 8 -16.135 0.10 13.66 9 -19.539 4.00 1.71300 53.9 13.65 10 -12.006 2.50 1.90043 37.4 14.47 11 -30.705 1.32 16.02 12 29.993 3.00 1.43875 94.7 17.02 13 ∞ 1.50 17.04 14 (Aperture) ∞ 5.84 17.05 15 22.733 2.50 1.90366 31.3 17.13 16 11.882 4.00 1.67270 32.1 15.72 17 35.536 0.96 15.34 18 -456.472 2.98 1.71300 53.9 15.34 19 -36.818 8.82 15.32 20 50.042 5.00 1.43875 94.7 15.45 21 -15.362 0.66 16.09 22 -15.704 1.00 2.00100 29.1 16.02 23 209.842 3.92 1.43875 94.7 17.80 24 -23.852 0.10 19.18 25 112.940 2.89 1.43875 94.7 21.18 26 -89.426 13.43 21.95 27* -56.954 2.71 1.72916 54.7 27.62 28* -36.143 13.06 28.79 Image plane ∞ Aspheric data Front page K =-1.45747e+01 A 4= 3.92487e-05 A 6=-2.40389e-07 A 8= 5.97203e-10 A10=-4.58627e-13 A12=-2.35685e-16 2nd side K =-2.15988e+00 A 4= 8.20950e-05 A 6= 5.68006e-07 A 8=-7.99187e-09 A10= 3.61040e-11 A12=-4.84023e-14 Page 27 K =-1.44983e+00 A 4=-1.68567e-04 A 6= 1.16285e-06 A 8=-9.54872e-09 A10=5.61320e-11 A12=-1.11585e-13 Page 28 K =-8.67627e-01 A 4=-1.32741e-04 A 6= 9.08901e-07 A 8=-6.07306e-09 A10=3.01551e-11 A12=-4.84268e-14 Various data Focal length 13.03 F-number 2.88 Half angle of view (°) 53.03 Image height 17.31 Lens length 113.39 BF 13.06 Anti-vibration lens group data First platform number 27 Last platform number 28 Focal length fis 128.590 mm Correction angle 0.400° Tilt component 1.357° Rotation center 6.525 mm Sensor shift amount -0.067 mm [Numerical Example 5] Unit: mm Surface Data Surface number rd nd νd Effective diameter 1* 17.419 1.00 1.95375 32.3 37.71 2* 8.543 14.77 26.37 3 222.236 4.50 1.63980 34.5 23.14 4 -30.589 0.10 22.08 5 -32.759 1.57 1.43875 94.7 21.11 6 25.121 8.89 17.30 7 -37.042 1.91 1.73800 32.3 11.82 8 -16.683 0.10 12.23 9 -19.666 4.00 1.71700 47.9 12.23 10 -11.780 2.44 1.88300 40.8 13.05 11 -27.212 2.77 14.29 12 31.999 3.00 1.43875 94.7 15.22 13 248.027 2.61 15.20 14 (Aperture) ∞ 2.70 15.22 15 17.267 2.19 1.90366 31.3 15.26 16 12.987 4.00 1.67270 32.1 14.13 17 19.928 2.09 13.10 18 266.181 3.00 1.74400 44.8 12.98 19 -31.296 0.55 12.79 20 31.557 4.20 1.45860 90.2 11.93 21 -17.773 0.12 12.29 22 -16.810 3.00 2.00100 29.1 12.30 23 23.317 5.00 1.49700 81.5 14.94 24 -26.657 0.93 17.33 25 202.932 2.90 1.67270 32.1 20.53 26 -44.178 11.94 21.33 27 -25.556 1.00 1.80400 46.6 27.53 28 -35.844 12.00 29.29 Image plane ∞ Aspheric data Front page K =-9.58533e+00 A 4= 5.29767e-05 A 6=-2.92923e-07 A 8= 7.25887e-10 A10=-7.96589e-13 A12= 2.13853e-16 2nd side K =-1.92005e+00 A 4= 1.14874e-04 A 6= 6.81843e-07 A 8=-8.35932e-09 A10=3.38475e-11 A12=-4.31149e-14 Various data Focal length 13.30 F-number 2.88 Half angle of view (°) 52.46 Image height 17.31 Lens length 103.29 BF 12.00 Anti-vibration lens group data First platform number 27 Last platform number 28 Focal length fis -115.762 mm Correction angle 0.400° Tilt component 0.924° Pivot center 0.399 mm Sensor shift amount -0.083 mm [Numerical Example 6] Unit: mm Surface Data Surface number rd nd νd Effective diameter 1* 27.973 3.00 1.53775 74.7 42.16 2* 13.640 10.58 28.93 3 29.473 1.00 1.43875 94.7 28.12 4 21.157 15.33 26.15 5 -16.716 1.68 1.64000 60.1 20.27 6 -16.735 4.78 20.59 7 -35.167 3.00 1.80400 46.6 14.19 8 -13.551 2.50 1.85025 30.1 13.76 9 -30.783 9.29 13.87 10 122.124 2.50 1.48071 85.3 15.06 11 -93.487 1.92 15.13 12 (Aperture) ∞ 1.95 15.08 13 17.961 1.21 1.85025 30.1 15.00 14 12.391 3.98 1.72047 34.7 14.23 15 66.142 0.63 13.49 16 -118.656 1.68 1.70154 41.2 13.45 17 -38.354 1.82 13.16 18 115.085 3.93 1.43875 94.7 11.47 19 -17.038 0.14 9.99 20 -15.867 2.25 1.91650 31.6 9.87 21 -1123.755 2.37 1.48749 70.2 11.07 22 -18.165 3.28 11.92 23* -23.139 1.19 1.76634 35.8 13.78 24* -1073.305 18.33 15.23 Image plane ∞ Aspheric data Front page K =-7.32424e-01 A 4= 6.57344e-05 A 6=-1.68061e-07 A 8=-1.92648e-11 A10= 2.02544e-13 A12= 1.27207e-17 2nd side K =-1.84504e-01 A 4= 8.61170e-05 A 6= 2.11791e-07 A 8=-3.91802e-09 A10=2.10138e-11 A12=-6.21372e-14 Page 23 K =-3.19330e+00 A 4=-8.61622e-05 A 6= 8.32104e-07 A 8= 7.45519e-10 A10=-2.98491e-11 A12= 9.23118e-14 Page 24 K = 1.38857e+04 A 4= 2.99195e-06 A 6= 9.77729e-07 A 8=-4.52650e-09 A10=3.60246e-11 A12=-1.65951e-13 Various data Focal length 20.39 F-number 2.88 Half angle of view (°) 42.13 Image height 18.44 Lens length 98.32 BF 18.33 Anti-vibration lens group data Starting platform number 3 Ending platform number 4 Focal length fis -177.403 mm Correction angle 0.400° Tilt component -0.263° Pivot center -3.274 mm Sensor shift amount -0.138 mm [Numerical Example 7] Unit: mm Surface Data Surface number rd nd νd Effective diameter 1* 16.366 1.86 2.00100 29.1 34.77 2* 7.914 15.95 24.21 3 34.635 3.10 1.76200 40.1 17.39 4 -61.266 0.58 16.34 5 -33.105 1.00 1.43875 94.7 16.03 6 22.217 4.92 13.40 7 150.304 2.03 1.73800 32.3 10.33 8 -19.965 0.32 10.49 9 -18.510 1.66 1.72047 34.7 10.44 10 -11.720 1.66 1.89190 37.1 10.61 11 -28.336 0.31 11.13 12 14.958 2.42 1.49700 81.5 11.25 13 206.437 1.62 10.93 14 (Aperture) ∞ 1.52 10.45 15 20.327 1.00 1.92286 18.9 9.78 16 14.188 1.00 1.65160 58.5 9.31 17 13.740 0.74 8.96 18 146.258 1.50 1.90043 37.4 8.96 19 -28.433 1.84 8.84 20 128.051 2.10 1.85033 42.7 9.26 21 -19.213 0.33 10.04 22 -13.946 1.00 1.92119 24.0 10.07 23 29.099 3.74 1.43875 94.7 11.83 24 -22.498 0.87 14.23 25 -24.730 1.00 1.91082 35.3 15.42 26 -22.882 2.93 16.21 27 -12.168 1.00 1.48071 85.3 17.31 28 -15.845 12.00 19.37 Image plane ∞ Aspheric data Front page K =-6.58353e+00 A 4= 3.44671e-05 A 6=-2.05340e-07 A 8= 4.13739e-10 A10=-1.50104e-13 A12=-3.63103e-16 2nd side K =-1.52060e+00 A 4= 8.42355e-05 A 6= 8.63489e-07 A 8=-9.21611e-09 A10=3.17240e-11 A12=-4.17083e-14 Various data Focal length 13.30 F-number 2.88 Half angle of view (°) 52.46 Image height 17.31 Lens total length 70.00 BF 12.00 Anti-vibration lens group data First platform number 27 Last platform number 28 Focal length fis -119.668 mm Correction angle 0.400° Tilt component 1.511° Rotation center 5.984 mm Sensor shift amount -0.058 mm

[0052] [Table 1]

[0053] [Imaging device] 34 shows a digital still camera as an imaging device equipped with the optical system L0 of each of the above-described embodiments as its imaging optical system. 20 denotes the camera body, and 21 denotes the imaging optical system configured with the optical system L0 of any of the embodiments 1 to 7. 22 denotes an imaging element such as a CCD sensor or CMOS sensor that is built into the camera body 20 and photoelectrically converts the optical image (subject image) formed by the imaging optical system 21, i.e., captures an image of the subject through the imaging optical system 21. 23 denotes a recording unit that records image data generated by processing the imaging signal from the imaging element 22, and 24 denotes a rear display that displays the image data.

[0054] In response to camera shake detected by a shake sensor (not shown), the camera body 20 performs image processing to shift the image sensor 22 or to shift the area to be cut out from the image data as an anti-shake operation. During this anti-shake operation, the camera body 20 rotates the anti-shake lens group LA in the optical system L0.

[0055] By using the optical system L0 of each embodiment, it is possible to obtain high-quality image data in which image blur is well corrected from the central area to the peripheral area, even though the optical system is small.

[0056] The imaging device may be a single-lens reflex camera having a quick-turn mirror, or may be a mirrorless camera having no quick-turn mirror.

[0057] The above embodiment includes the following configurations.

[0058] (Configuration 1) An optical system used in an imaging device that performs an image stabilization operation by moving an image sensor that captures an image of a subject or by moving a cutout area in an image generated using a signal from the image sensor, An optical system comprising a vibration-proof lens group that rotates so as to be tilted relative to an optical axis of the optical system. (Configuration 2) The optical system according to configuration 1, wherein the vibration-proof lens group is composed of one single lens or one cemented lens. (Configuration 3) When the focal length of the vibration-proof lens group is fis and the focal length of the optical system is f, 8.45≦|fis| / f≦30.00 3. The optical system according to configuration 1 or 2, wherein the following condition is satisfied: (Configuration 4) an aperture stop; When the distance on the optical axis from the aperture stop to the lens surface in the vibration-reduction lens group closest to the aperture stop is defined as tis and the focal length of the optical system is defined as f, 1.3≦|tis| / f≦6.0 4. The optical system according to any one of configurations 1 to 3, wherein the following condition is satisfied: (Configuration 5) When the distance on the optical axis from the lens surface closest to the object in the vibration-reduction lens group to the rotation center of the vibration-reduction lens group is dis and the focal length of the optical system is f, 0<|dis| / f≦0.51 5. The optical system according to any one of configurations 1 to 4, wherein the following condition is satisfied: (Configuration 6) Let Da be the length from the lens surface closest to the object in the vibration-reduction lens group to the lens surface closest to the image in the vibration-reduction lens group, and D be the length on the optical axis from the lens surface closest to the object in the optical system to the image plane, 0 <Da / D≦0.06 6. The optical system according to any one of configurations 1 to 5, wherein the following condition is satisfied: (Configuration 7) When the length on the optical axis from the lens surface closest to the image side of the optical system to the image plane is Dbf and the focal length of the optical system is f, 0.75≦Dbf / f≦1.30 7. The optical system according to any one of configurations 1 to 6, wherein the following condition is satisfied: (Configuration 8) When the length from the lens surface of the vibration-reduction lens group closest to the object side to the lens surface of the vibration-reduction lens group closest to the image side is Da and the focal length of the vibration-reduction lens group is fis, 0 <Da / |fis|≦0.03 8. The optical system according to any one of configurations 1 to 7, wherein the following condition is satisfied: (Configuration 9) When the maximum image height of the optical system is ymax and the focal length of the optical system is f, 0.8≦ymax / f≦1.8 9. The optical system according to any one of configurations 1 to 8, wherein the following condition is satisfied: (Configuration 10) 10. The optical system according to any one of configurations 1 to 9, characterized in that it is composed of, arranged in order from the object side to the image side, a first lens group, a second lens group as the vibration-proof lens group, an aperture stop, and a third lens group. (Configuration 11) 10. The optical system according to any one of configurations 1 to 9, characterized in that it is composed of, arranged in order from the object side to the image side, a first lens group, an aperture stop, a second lens group, and a third lens group serving as the vibration-proof lens group. (Configuration 12) 10. The optical system according to any one of configurations 1 to 9, characterized in that it is configured to include, in order from the object side to the image side, a first lens group, a second lens group including an aperture stop closest to the object side, and a third lens group serving as the vibration-reduction lens group. (Configuration 13) 10. The optical system according to any one of configurations 1 to 9, characterized in that it is composed of, arranged in order from the object side to the image side, a first lens group, a second lens group as the vibration-proof lens group, a third lens group, an aperture stop, and a fourth lens group. (Configuration 14) 14. A lens device having the optical system according to any one of configurations 1 to 13 and detachably attached to the imaging device, A lens device, characterized in that the vibration-reduction lens group is rotated when the vibration-reduction operation is performed in the imaging device. (Configuration 15) An imaging device having the optical system according to any one of configurations 1 to 13 integrally therewith or detachably attached thereto, The imaging apparatus is characterized in that the vibration-reduction lens group is rotated when the vibration-reduction operation is performed. (Configuration 16) An imaging device having the optical system according to any one of configurations 1 to 13 integrally therewith or detachably attached thereto, an imaging apparatus, characterized in that image processing is performed to correct distortion aberration for an image generated using a signal from the imaging element, using distortion correction data corresponding to the optical system;

[0059] The embodiments described above are merely representative examples, and various modifications and alterations are possible to each embodiment when implementing the present invention. [Explanation of symbols]

[0060] L0 optical system L1 First lens group L2 Second lens group L3: Third lens group L4 4th lens group LA Anti-vibration lens group SP aperture stop

Claims

1. An optical system used in an imaging device that performs an image stabilization operation by moving an image sensor that captures an image of a subject or by moving a cutout area in an image generated using a signal from the image sensor, An optical system comprising a vibration-proof lens group that rotates so as to be tilted relative to an optical axis of the optical system.

2. 2. The optical system according to claim 1, wherein the vibration-proof lens group is composed of one single lens or one cemented lens.

3. When the focal length of the vibration-proof lens group is fis and the focal length of the optical system is f, 8.45≦|fis| / f≦30.00 2. The optical system according to claim 1, wherein the following condition is satisfied:

4. an aperture stop; When the distance on the optical axis from the aperture stop to the lens surface in the vibration-reduction lens group closest to the aperture stop is defined as tis and the focal length of the optical system is defined as f, 1.3≦|tis| / f≦6.0 2. The optical system according to claim 1, wherein the following condition is satisfied:

5. When the distance on the optical axis from the lens surface closest to the object in the vibration-reduction lens group to the rotation center of the vibration-reduction lens group is denoted by dis and the focal length of the optical system is denoted by f, 0<|dis| / f≦0.51 2. The optical system according to claim 1, wherein the following condition is satisfied:

6. When the length from the lens surface closest to the object in the vibration-reduction lens group to the lens surface closest to the image in the vibration-reduction lens group is Da, and the length on the optical axis from the lens surface closest to the object in the optical system to the image plane is D, 0<Da / D≦0.06 2. The optical system according to claim 1, wherein the following condition is satisfied:

7. When the length on the optical axis from the lens surface closest to the image side of the optical system to the image plane is Dbf and the focal length of the optical system is f, 0.75≦Dbf / f≦1.30 2. The optical system according to claim 1, wherein the following condition is satisfied:

8. When the length from the lens surface of the vibration-reduction lens group closest to the object side to the lens surface of the vibration-reduction lens group closest to the image side is Da and the focal length of the vibration-reduction lens group is fis, 0<Da / |fis|≦0.03 2. The optical system according to claim 1, wherein the following condition is satisfied:

9. When the maximum image height of the optical system is ymax and the focal length of the optical system is f, 0.8≦ymax / f≦1.8 2. The optical system according to claim 1, wherein the following condition is satisfied:

10. 2. The optical system according to claim 1, comprising, arranged in order from the object side to the image side, a first lens group, a second lens group as the vibration-proof lens group, an aperture stop, and a third lens group.

11. 2. The optical system according to claim 1, comprising, arranged in order from the object side to the image side, a first lens group, an aperture stop, a second lens group, and a third lens group serving as the vibration reduction lens group.

12. 2. The optical system according to claim 1, comprising, arranged in order from the object side to the image side, a first lens group, a second lens group including an aperture stop closest to the object side, and a third lens group serving as the vibration-reduction lens group.

13. 2. The optical system according to claim 1, comprising, arranged in order from the object side to the image side, a first lens group, a second lens group serving as the vibration-proof lens group, a third lens group, an aperture stop, and a fourth lens group.

14. A lens device comprising the optical system according to any one of claims 1 to 13 and detachably attached to the imaging device, A lens device, characterized in that the vibration-reduction lens group is rotated when the vibration-reduction operation is performed in the imaging device.

15. An imaging device having the optical system according to any one of claims 1 to 13 integrally therewith or detachably attached thereto, The imaging apparatus is characterized in that the vibration-reduction lens group is rotated when the vibration-reduction operation is performed.

16. An imaging device having the optical system according to any one of claims 1 to 13 integrally therewith or detachably attached thereto, an imaging apparatus, characterized in that image processing is performed to correct distortion aberration for an image generated using a signal from the imaging element, using distortion correction data corresponding to the optical system;

Images