WO2011099248A1 - ズームレンズ系、交換レンズ装置、及びカメラシステム - Google Patents
ズームレンズ系、交換レンズ装置、及びカメラシステム Download PDFInfo
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- WO2011099248A1 WO2011099248A1 PCT/JP2011/000540 JP2011000540W WO2011099248A1 WO 2011099248 A1 WO2011099248 A1 WO 2011099248A1 JP 2011000540 W JP2011000540 W JP 2011000540W WO 2011099248 A1 WO2011099248 A1 WO 2011099248A1
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- lens
- lens group
- zoom lens
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- zoom
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
- G02B15/144109—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +--+
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
Definitions
- the present invention relates to a zoom lens system, and more particularly to a zoom lens system suitable as an imaging lens system for a so-called interchangeable lens digital camera system.
- the present invention also relates to an interchangeable lens apparatus and a camera system using the zoom lens system.
- An interchangeable lens digital camera system (also simply referred to as a “camera system”) includes a camera body having an image sensor such as a CCD (Charge Coupled Device) and a CMOS (Complementary Metal-Oxide Semiconductor), and an optical image on the light receiving surface of the image sensor. And an interchangeable lens device including an imaging lens system for forming the lens.
- an image sensor larger than that mounted on a compact digital camera is used. Therefore, the interchangeable lens digital camera system can capture a high-sensitivity and high-quality image.
- the interchangeable lens digital camera system has advantages such as high-speed focusing operation and image processing after imaging, and easy replacement of the interchangeable lens device according to the scene to be photographed.
- An interchangeable lens device including a zoom lens system that forms an optical image so as to be variable in magnification is popular in that the focal length can be freely changed without replacing the lens.
- the interchangeable lens digital camera system has the above-mentioned various advantages, but is larger in size and weight than a compact digital camera. In order to facilitate carrying and handling, the size and weight are preferably as small as possible.
- the zoom lens system for the interchangeable lens digital camera system is also required to be as compact and light as possible while maintaining the imaging performance.
- an object of the present invention is to provide a zoom lens system that can be suitably used in an interchangeable lens digital camera system, is small in size and lightweight, and has excellent imaging performance.
- Another object of the present invention is to provide an interchangeable lens device and a camera system that are small in size and light in weight.
- the zoom lens system includes a first lens group that is disposed closest to the object side and has positive power, and a focusing lens that moves along the optical axis during focusing from an infinitely focused state to a close-joined focused state.
- a focusing lens group, an image blur correction sub-lens group, and an aperture stop are adjacent to each other. Furthermore, the following conditions are satisfied. 0.7 ⁇ BF W / f W ⁇ 3.0 (8) here, BF W : Back focus of the entire system at the wide angle end f W : Focal length of the entire system at the wide angle end.
- An interchangeable lens barrel according to the present invention is a lens that can be connected to a camera body including the zoom lens system described above and an image sensor that receives an optical image formed by the zoom lens system and converts it into an electrical image signal.
- a mounting portion is a lens that can be connected to a camera body including the zoom lens system described above and an image sensor that receives an optical image formed by the zoom lens system and converts it into an electrical image signal.
- a camera system includes an interchangeable lens apparatus including the zoom lens system described above, and an interchangeable lens apparatus that is detachably connected to the camera mount unit, and receives an optical image formed by the zoom lens system.
- a camera body including an image sensor for converting into a typical image signal.
- the present invention it is possible to realize a zoom lens system that is small in size and light in weight and excellent in imaging performance, and an interchangeable lens apparatus and a camera system having the zoom lens system.
- FIG. 1 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 1 (Example 1).
- FIG. 2 is a longitudinal aberration diagram of the zoom lens system according to Example 1 when the zoom lens system is in focus at infinity.
- FIG. 3 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 1.
- FIG. 4 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 2 (Example 2).
- FIG. 5 is a longitudinal aberration diagram of the zoom lens system according to Example 2 when the zoom lens system is in focus at infinity.
- FIG. 5 is a longitudinal aberration diagram of the zoom lens system according to Example 2 when the zoom lens system is in focus at infinity.
- FIG. 6 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 2.
- FIG. 7 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 3 (Example 3).
- FIG. 8 is a longitudinal aberration diagram of the zoom lens system according to Example 3 when the zoom lens system is in focus at infinity.
- FIG. 9 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of the zoom lens system according to Example 3.
- FIG. 10 is a lens layout diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 4 (Example 4).
- FIG. 11 is a longitudinal aberration diagram of the zoom lens system according to Example 4 when the zoom lens system is in focus at infinity.
- FIG. 12 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 4.
- FIG. 13 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 5 (Example 5).
- FIG. 14 is a longitudinal aberration diagram of the zoom lens system according to Example 5 when the zoom lens system is in focus at infinity.
- FIG. 15 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 5.
- FIG. 12 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 4.
- FIG. 12 is a lateral
- FIG. 16 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 6 (Example 6).
- FIG. 17 is a longitudinal aberration diagram of the zoom lens system according to Example 6 at an infinite focus state.
- FIG. 18 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 6.
- FIG. 19 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 7 (Example 7).
- FIG. 20 is a longitudinal aberration diagram of the zoom lens system according to Example 7 at the infinite focus state.
- FIG. 21 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state, at the telephoto end of a zoom lens system according to Example 7.
- FIG. 22 is a lens arrangement diagram illustrating an infinitely focused state of the zoom lens system according to Embodiment 8 (Example 8).
- FIG. 23 is a longitudinal aberration diagram of the zoom lens system according to Example 8 when the zoom lens system is in focus at infinity.
- FIG. 24 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at the telephoto end of a zoom lens system according to Example 8.
- FIG. 25 is a schematic configuration diagram of a camera system according to the ninth embodiment.
- 1, 4, 7, 10, 13, 16, 19, and 22 are lens arrangement diagrams of the zoom lens system according to Embodiments 1, 2, 3, 4, 5, 6, 7, and 8, respectively. Both represent a zoom lens system in an infinitely focused state.
- FIG. 5C shows the lens configuration at the telephoto end (longest focal length state: focal length f T ).
- the broken line arrows provided between FIGS. (A) and (b) are obtained by connecting the positions of the lens groups in the wide-angle end, the intermediate position, and the telephoto end in order from the top. Straight line.
- the wide-angle end and the intermediate position, and the intermediate position and the telephoto end are simply connected by a straight line, which is different from the actual movement of each lens group.
- an arrow attached to the lens group represents focusing from an infinitely focused state to a close object focused state. That is, the moving direction during focusing from the infinitely focused state to the close object focused state is shown.
- an asterisk * attached to a specific surface indicates that the surface is aspherical.
- a symbol (+) and a symbol ( ⁇ ) attached to a symbol of each lens group correspond to a power symbol of each lens group.
- the straight line described on the rightmost side represents the position of the image plane S.
- an aperture stop A is provided in the fourth lens group G4.
- the first lens group G1 having a positive power
- the second lens group G2 having a negative power
- the negative power in order from the object side to the image side.
- a fourth lens group G4 having a positive power.
- the first lens group G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface facing the object side, and a positive meniscus second lens element L2 having a convex surface facing the object side. It consists of.
- the first lens element L1 and the second lens element L2 are cemented with each other.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus third lens element L3 having a convex surface facing the object side, a biconcave fourth lens element L4, and a convex surface facing the object side. And a positive meniscus fifth lens element L5.
- the third lens group G3 is composed of a negative meniscus sixth lens element L6 with the convex surface facing the image side.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, a biconcave ninth lens element L9, and an image.
- the eighth lens element L8 and the ninth lens element are bonded to each other, and the eleventh lens element L11 and the twelfth lens element L12 are bonded to each other. Further, both surfaces of the tenth lens element L10 are aspheric.
- the tenth lens element L10 is made of resin.
- the first lens group G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side, and a biconvex second lens element.
- the first lens element L1 and the second lens element L2 are cemented with each other.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus third lens element L3 having a convex surface directed toward the object side, a biconcave fourth lens element L4, and a biconvex second lens element L4. 5 lens elements L5.
- the third lens group G3 is composed of a negative meniscus sixth lens element L6 with the convex surface facing the image side.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, a biconcave ninth lens element L9, and an object A negative meniscus tenth lens element L10 having a convex surface facing the side, a biconvex eleventh lens element L11, and a negative meniscus twelfth lens element L12 having a convex surface facing the image side.
- the eighth lens element L8 and the ninth lens element L9 are joined together, and the tenth lens element L10 and the eleventh lens element L11 are joined together. Further, both surfaces of the twelfth lens element L12 are aspheric.
- the twelfth lens element L12 is made of resin.
- the first lens group G1 includes a biconvex first lens element L1.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus second lens element L2 having a convex surface directed toward the object side, a biconcave third lens element L3, and a biconvex second lens element L3. 4 lens element L4.
- the third lens group G3 is composed of a biconcave fifth lens element L5.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex sixth lens element L6, a biconvex seventh lens element L7, and a negative meniscus second lens with a convex surface facing the image side.
- the seventh lens element L7 and the eighth lens element L8 are cemented with each other. Further, both surfaces of the eleventh lens element L11 are aspheric.
- the eleventh lens element L11 is made of resin.
- the first lens group G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface directed toward the object side, and a biconvex second lens element L2.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus third lens element L3 having a convex surface directed toward the object side, a biconcave fourth lens element L4, and a biconvex second lens element L4. 5 lens elements L5.
- the third lens group G3 is composed of a negative meniscus sixth lens element L6 with the convex surface facing the image side.
- the object side surface of the sixth lens element L6 is aspheric.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, a biconcave ninth lens element L9, and an object A positive meniscus tenth lens element L10 having a convex surface facing the side, a biconvex eleventh lens element L11, and a negative meniscus twelfth lens element L12 having a convex surface facing the image side.
- the eighth lens element L8 and the ninth lens element L9 are cemented with each other. Further, both surfaces of the tenth lens element L10 are aspheric.
- the tenth lens element L10 is made of resin.
- the first lens group G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface facing the object side, and a positive meniscus second lens element L2 having a convex surface facing the object side. It consists of.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus third lens element L3 having a convex surface directed toward the object side, a biconcave fourth lens element L4, and a biconvex second lens element L4. 5 lens elements L5.
- the third lens group G3 is composed of a negative meniscus sixth lens element L6 with the convex surface facing the image side.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, and a negative meniscus second lens element with a convex surface facing the image side.
- the eighth lens element L8 and the ninth lens element are cemented with each other.
- the object side surface of the seventh lens element L7 and both surfaces of the tenth lens element L10 are aspheric.
- the seventh lens element L7 and the tenth lens element L10 are made of resin.
- the first lens group G1 includes, in order from the object side to the image side, a negative meniscus first lens element L1 having a convex surface facing the object side, and a positive meniscus second lens element L2 having a convex surface facing the object side. It consists of.
- the first lens element L1 and the second lens element L2 are cemented with each other.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus third lens element L3 having a convex surface directed toward the object side, a biconcave fourth lens element L4, and a biconvex second lens element L4. 5 lens elements L5.
- the third lens group G3 includes a biconcave sixth lens element L6.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, a biconcave ninth lens element L9, and an object A positive meniscus tenth lens element L10 having a convex surface facing the side, a biconvex eleventh lens element L11, and a negative meniscus twelfth lens element L12 having a convex surface facing the image side.
- the eighth lens element L8 and the ninth lens element L9 are cemented with each other, and the eleventh lens element L11 and the twelfth lens element L12 are cemented with each other. Further, both surfaces of the tenth lens element L10 are aspheric.
- the tenth lens element L10 is made of resin.
- a vertical line between the ninth lens element L9 and the tenth lens element L10 represents a flare cut stop.
- the first lens group G1 includes a biconvex first lens element L1.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus second lens element L2 having a convex surface directed toward the object side, a biconcave third lens element L3, and a biconvex second lens element L3. 4 lens element L4.
- the third lens group G3 is composed of a biconcave fifth lens element L5.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex sixth lens element L6, a biconvex seventh lens element L7, a biconcave eighth lens element L8, and an object A positive meniscus ninth lens element L9 having a convex surface facing the side, a biconvex tenth lens element L10, and a negative meniscus eleventh lens element L11 having a convex surface facing the image side.
- the seventh lens element L7 and the eighth lens element L8 are cemented with each other, and the tenth lens element L10 and the eleventh lens element L11 are cemented with each other. Further, both surfaces of the ninth lens element L9 are aspheric.
- the ninth lens element L9 is made of resin.
- the first lens group G1 is composed of a biconvex first lens element L1 in order from the object side to the image side.
- the second lens group G2 includes, in order from the object side to the image side, a negative meniscus second lens element L2 having a convex surface directed toward the object side, a biconcave third lens element L3, and a biconvex second lens element L3.
- 4 lens element L4 and negative meniscus fifth lens element L5 having a convex surface facing the image side.
- the fourth lens element L4 and the fifth lens element L5 are cemented with each other.
- the third lens group G3 is composed of a negative meniscus sixth lens element L6 with the convex surface facing the image side.
- the fourth lens group G4 includes, in order from the object side to the image side, a biconvex seventh lens element L7, a biconvex eighth lens element L8, a biconcave ninth lens element L9, It comprises a convex tenth lens element L10, a biconvex eleventh lens element L11, and a negative meniscus twelfth lens element L12 with the convex surface facing the image side.
- the eighth lens element L8 and the ninth lens element L9 are cemented with each other. Both surfaces of the tenth lens element L10 are aspheric.
- the tenth lens element L10 is made of resin.
- the distance between the first lens group G1 and the second lens group G2 is longer at the telephoto end than at the wide-angle end, and the second lens group G2 and the second lens group G2
- Each lens group extends along the optical axis so that the distance between the third lens group G3 is longer at the telephoto end than at the wide angle end, and the distance between the third lens group G3 and the fourth lens group G4 is shorter at the telephoto end than at the wide angle end.
- the aperture stop A moves along the optical axis together with the fourth lens group G4.
- the distance between the first lens group G1 and the second lens group G2 monotonously increases, and the distance between the second lens group G2 and the third lens group G3 decreases.
- the distance between the third lens group G3 and the fourth lens group G4 decreases monotonously.
- Embodiment 6 during zooming from the wide-angle end to the telephoto end, the distance between the first lens group G1 and the second lens group G2 is longer at the telephoto end than at the wide-angle end, and the second lens group G2 and the third lens group G3.
- the lens groups are longer on the object side along the optical axis so that the distance between the third lens group G3 and the fourth lens group G4 is shorter at the telephoto end than at the wide angle end.
- the aperture stop A moves along the optical axis together with the fourth lens group G4.
- the distance between the first lens group G1 and the second lens group G2 increases monotonously, and the distance between the second lens group G2 and the third lens group G3 increases monotonously.
- the distance between the third lens group G3 and the fourth lens group G4 decreases monotonously.
- Embodiment 7 during zooming from the wide-angle end to the telephoto end, the distance between the first lens group G1 and the second lens group G2 is longer at the telephoto end than at the wide-angle end, and the second lens group G2 and the third lens group G3.
- the aperture stop A moves along the optical axis together with the fourth lens group G4.
- the distance between the first lens group G1 and the second lens group G2 monotonously increases, and the distance between the second lens group G2 and the third lens group G3 decreases.
- the distance between the third lens group G3 and the fourth lens group G4 decreases monotonously.
- the first lens group G1 moves along the optical axis during zooming.
- the first lens group G1 By making the first lens group a variable power group, the light beam height in the first lens group G1 can be reduced. As a result, the first lens group G1 can be downsized.
- the fourth lens group G4 moves along the optical axis. By using the fourth lens group G4 as a variable power group, it is possible to improve the imaging performance of the zoom lens system while reducing the size during contraction.
- the third lens group G3 moves toward the object side along the optical axis during focusing from the infinitely focused state to the near-joined focused state.
- the third lens group G3 is provided with a function as a focusing lens group, and the third lens group is constituted by one lens element, the weight of the focusing lens group can be reduced. With this configuration, high-speed focusing can be realized.
- the fourth lens group G4 includes a first sub lens group and a second sub lens group in order from the object side to the image side.
- the sub lens group refers to any one lens element included in the lens group or a combination of adjacent lens elements when one lens group includes a plurality of lens elements.
- the seventh lens element L7 constitutes the first sub lens group
- the eighth lens element L8 to the twelfth lens element L12 constitute the second sub lens group.
- the sixth lens element L6 constitutes a first sub lens group
- the seventh lens element L7 to the eleventh lens element L11 constitute a second sub lens group.
- the first sub-lens group in the fourth lens group G4 is set in a direction orthogonal to the optical axis when correcting image blur due to vibration applied to the zoom lens. Move to correct the image point movement caused by the vibration of the entire system.
- the image blur correcting lens group when configured by only a part of the lens elements constituting the fourth lens group, the image blur correcting lens group can be reduced in weight. Therefore, the image blur correcting lens group can be driven with a simple driving mechanism. In particular, when the image blur correction lens group is composed of only one lens element, the drive mechanism of the image blur correction lens group can be further simplified.
- the first lens group is preferably composed of one or two lens elements. As the number of lens elements constituting the first lens group increases, the diameter of the first lens group increases. When the first lens group is composed of two lens elements, both the constituent length and diameter of the first lens group can be reduced, which is advantageous for downsizing the entire system. Further, the cost can be reduced by reducing the number of necessary lens elements.
- the first lens group is preferably composed only of cemented lenses. In this case, chromatic aberration at the telephoto end can be corrected well.
- the fourth lens group includes a resin lens element. By forming at least one lens element constituting the fourth lens group with resin, it is possible to reduce the manufacturing cost of the zoom lens system.
- the focusing lens group, the image blur correcting lens group, and the aperture stop are disposed adjacent to each other.
- the drive mechanism including the actuator can be simplified, so that the interchangeable lens device can be miniaturized.
- the drive mechanism can be further simplified.
- the zoom lens system according to each embodiment satisfies as many of the following conditions as possible. However, by satisfying individual conditions, it is possible to obtain a zoom lens system that exhibits the corresponding effects.
- the zoom lens system according to each embodiment preferably satisfies the following condition (1).
- T 4 thickness of the fourth lens group in the optical axis direction (mm)
- f W focal length of the entire system at the wide angle end (mm) It is.
- Condition (1) defines the configuration length of the fourth lens group in the optical axis direction.
- condition (1) When the condition (1) is satisfied, it is possible to achieve downsizing of the zoom lens system and good correction of various aberrations including field curvature.
- Exceeding the upper limit of condition (1) leads to an increase in the overall length of the zoom lens system, which is disadvantageous for downsizing the zoom lens system.
- the lower limit of condition (1) if the lower limit of condition (1) is not reached, it will be difficult to correct field curvature.
- the zoom lens system according to each embodiment preferably satisfies the following condition (2). 0.71 ⁇
- Condition (2) defines the amount of movement of the fourth lens group during zooming. When the condition (2) is satisfied, it is possible to achieve downsizing of the zoom lens and good aberration correction. If the upper limit of the condition (2) is exceeded, the amount of movement of the fourth lens group at the time of zooming becomes large and it becomes difficult to reduce the size. On the other hand, if the lower limit of condition (2) is not reached, the contribution of the fourth lens group to zooming becomes too small, making it difficult to correct aberrations.
- the zoom lens system according to each embodiment preferably satisfies the following condition (3). 0.2 ⁇
- Condition (3) defines the focal length of the focusing lens group.
- condition (3) it is possible to achieve suppression of aberration fluctuations during zooming and high-speed focusing.
- the upper limit of condition (3) is exceeded, aberration fluctuations, particularly field curvature fluctuations between the infinitely focused state and the near-joined focused state increase, leading to deterioration of image quality.
- the lower limit of condition (3) the amount of focus movement increases, making it difficult to realize high-speed focusing.
- the zoom lens system according to each embodiment preferably satisfies the following condition (4). 0.77 ⁇
- Condition (4) defines the amount of movement of the first lens group.
- the condition (4) is satisfied, it is possible to achieve a compact zoom lens system and good correction of various aberrations including field curvature.
- the cam becomes large, and it becomes difficult to make the zoom lens system compact at the time of contraction.
- the lower limit of the condition (4) it becomes difficult to correct various aberrations, particularly the field curvature at the telephoto end.
- the zoom lens system according to each embodiment preferably satisfies the following condition (5). 0.3 ⁇ (D 3WT ⁇ D 4WT ) / f W ⁇ 1.5 (5) here, D 3WT : Movement amount (mm) of the third lens group during zooming from the wide-angle end to the telephoto end, D 4WT : Amount of movement (mm) of the fourth lens group during zooming from the wide-angle end to the telephoto end, f W : focal length of the entire system at the wide angle end (mm) It is.
- Condition (5) defines the distance between the third lens group and the fourth lens group during zooming from the wide-angle end to the telephoto end.
- the zoom lens system can be made compact while maintaining the zoom ratio.
- the upper limit of the condition (5) is exceeded, it is difficult to reduce the size of the zoom lens system.
- the lower limit of the condition (5) is not reached, it is difficult to ensure a zoom ratio.
- the zoom lens system according to each embodiment preferably satisfies the following condition (6).
- D 3WM the amount of movement (mm) of the third lens group during zooming from the wide-angle end to the intermediate position
- D 4WM Movement amount (mm) of the fourth lens group during zooming from the wide-angle end to the intermediate position
- f W focal length of the entire system at the wide angle end (mm) It is.
- Condition (6) defines the distance between the third lens group and the fourth lens group during zooming from the wide-angle end to the intermediate position.
- the zoom lens system can be made compact while maintaining the zoom ratio.
- the upper limit of the condition (6) is exceeded, it is difficult to reduce the size of the zoom lens system.
- the lower limit of condition (6) is not reached, it is difficult to ensure a zoom ratio.
- the zoom lens system according to each embodiment preferably satisfies the following condition (7).
- Condition (7) defines the focal length of the resin lens included in the fourth lens group. When the condition (7) is satisfied, the image quality can be maintained even if the refractive index of the resin lens changes due to a change in environmental temperature. If the numerical value range of the condition (7) is not met, if the refractive index of the resin lens changes due to a change in the environmental temperature, the curvature of field increases, leading to deterioration in image quality.
- the zoom lens system according to each embodiment preferably satisfies the following condition (8). 0.7 ⁇ BF W / f W ⁇ 3.0 (8) here, BF W : Back focus of entire system at wide angle end f W : focal length of the entire system at the wide angle end (mm) It is.
- Condition (8) defines the back focus of the entire system at the wide angle end.
- the condition (8) is satisfied, it is possible to achieve both the miniaturization of the zoom lens system and the avoidance of the image quality deterioration at the periphery of the imaging region. If the upper limit of the condition (8) is exceeded, it is difficult to reduce the size of the zoom lens system. On the other hand, if the lower limit of the condition (8) is not reached, the light incident angle with respect to the image pickup device becomes large, and it becomes difficult to secure illuminance at the periphery of the image pickup region.
- the zoom lens system according to each embodiment preferably satisfies the following condition (9). 1.50 ⁇ nd 1 ⁇ 1.72 (9) here, nd 1 is a refractive index with respect to the d-line of the positive lens element constituting the first lens group.
- Condition (9) defines the refractive index for the d-line of the positive lens element constituting the first lens group.
- the zoom lens system can be downsized at low cost. If the upper limit of the condition (9) is exceeded, it will be difficult to reduce the cost. On the other hand, below the lower limit of the condition (9), the core thickness of the positive lens element constituting the first lens group increases, which is disadvantageous for downsizing the zoom lens system.
- the zoom lens system according to each embodiment preferably satisfies the following condition (10). 50 ⁇ d 1 ⁇ 75 (10) here, ⁇ d 1 : Abbe number of the positive lens element constituting the first lens group.
- Condition (10) defines the Abbe number of the positive lens elements constituting the first lens group. When the condition (10) is satisfied, a zoom lens system with excellent image quality can be realized at low cost. If the upper limit of the condition (10) is exceeded, cost reduction will be difficult. On the other hand, if the lower limit of condition (10) is not reached, it will be difficult to correct chromatic aberration at the telephoto end.
- Each lens group of the zoom lens system according to each embodiment includes only a refractive lens element that changes incident light by refraction (that is, a lens that is deflected at an interface between media having different refractive indexes). You may comprise.
- each lens group includes a diffractive lens element that deflects incident light by a diffractive action, a refractive / diffractive hybrid lens element that deflects incident light by a combination of diffractive action and refracting action, and a refractive index of the incident light in the medium. It may be configured by any one kind or a combination of plural kinds of refractive index distribution type lens elements which are deflected by distribution.
- FIG. 25 is a schematic configuration diagram of a lens interchangeable digital camera system according to the ninth embodiment.
- the interchangeable lens digital camera system 100 includes a camera body 101 and an interchangeable lens device 201 that is detachably connected to the camera body 101.
- the camera body 101 receives an optical image formed by the zoom lens system 202 of the interchangeable lens apparatus 201, and displays an image sensor 102 that converts the optical image into an electrical image signal, and an image signal converted by the image sensor 102.
- a liquid crystal monitor 103 and a camera mount unit 104 are included.
- the interchangeable lens device 201 is connected to the zoom lens system 202 according to any one of the first to eighth embodiments, the lens barrel 203 that holds the zoom lens system 202, and the camera mount unit 104 of the camera body.
- Lens mount unit 204 The camera mount unit 104 and the lens mount unit 204 electrically connect not only a physical connection but also a controller (not shown) in the camera body 101 and a controller (not shown) in the interchangeable lens device 201. It also functions as an interface that enables mutual signal exchange.
- the zoom lens system 202 according to any one of Embodiments 1 to 8 is used. Therefore, an interchangeable lens device that is compact and excellent in imaging performance can be realized at low cost. In addition, the entire camera system 100 according to the present embodiment can be reduced in size and cost.
- Z distance from a point on the aspheric surface having a height h from the optical axis to the tangent plane of the aspheric vertex
- h height from the optical axis
- r vertex radius of curvature
- ⁇ conic constant
- An n-order aspherical coefficient.
- each longitudinal aberration diagram shows the aberration at the wide angle end, (b) shows the intermediate position, and (c) shows the aberration at the telephoto end.
- SA spherical aberration
- AST mm
- DIS distortion
- the vertical axis represents the F number (indicated by F in the figure)
- the solid line is the d line (d-line)
- the short broken line is the F line (F-line)
- the long broken line is the C line (C- line).
- the vertical axis represents the image height (indicated by H in the figure), the solid line represents the sagittal plane (indicated by s), and the broken line represents the meridional plane (indicated by m in the figure). is there.
- the vertical axis represents the image height (indicated by H in the figure).
- FIG. 6 is a lateral aberration diagram in a basic state and an image blur correction state.
- the upper three aberration diagrams show the basic state where image blur correction at the telephoto end is not performed
- the lower three aberration diagrams show the image blur correction sub-lens group (first lens) included in the fourth lens group G4. This corresponds to the image blur correction state at the telephoto end where the sub lens group) is moved by a predetermined amount in the direction perpendicular to the optical axis.
- the upper row shows the lateral aberration at the image point of 70% of the maximum image height
- the middle row shows the lateral aberration at the axial image point
- the lower row shows the lateral aberration at the image point of -70% of the maximum image height.
- the upper stage is the lateral aberration at the image point of 70% of the maximum image height
- the middle stage is the lateral aberration at the axial image point
- the lower stage is at the image point of -70% of the maximum image height.
- the horizontal axis represents the distance from the principal ray on the pupil plane
- the solid line is the d line (d-line)
- the short broken line is the F line (F-line)
- the long broken line is the C line ( C-line) characteristics.
- the meridional plane is a plane including the optical axis of the first lens group G1.
- the amount of movement (Y T (mm)) in the direction perpendicular to the optical axis of the image blur correction sub lens group at the telephoto end is shown in Table 1 below. As shown.
- the image blur correction angle is 0.3 °. That is, the amount of movement of the image blur correction sub-lens group shown below is equal to the amount of image eccentricity when the optical axis of the zoom lens system is inclined by 0.3 °.
- Table 1 (Moving amount of image blur correction sub lens group)
- Table 6 (Zoom lens group data) Group Start surface Focal length Lens construction length Front principal point position Rear principal point position 1 1 70.00212 6.83190 -0.77084 1.89721 2 4 -15.72872 9.56240 -0.26444 1.33694 3 10 -53.43006 0.70000 -0.16915 0.13413 4 12 19.35651 24.30460 5.05052 8.87194
- Table 7 (Zoom lens group magnification) Group Start surface Wide angle Medium telephoto 1 1 0.00000 0.00000 0.00000 2 4 -0.31967 -0.37545 -0.46362 3 10 0.61744 0.61543 0.59900 4 12 -1.04226 -1.49355 -2.08458
- Table 8 (Surface data) Surface number r d nd vd Object ⁇ 1 34.81640 1.20000 1.84666 23.8 2 25.04840 5.76580 1.58913 61.3 3 -4281.80260 Variable 4 36.49200 0.70000 1.77250 49.6 5 11.63370 3.94740 6 -57.69330 0.70000 1.83481 42.7 7 12.31460 1.84990 8 15.66210 3.28110 1.84666 23.8 9 -73.37440 Variable 10 -23.99440 0.70000 1.80610 40.7 11 -303.00270 Variable 12 252.00270 1.45400 1.69680 55.5 13 -50.93810 1.50000 14 (Aperture) ⁇ 0.50000 15 16.36830 3.14470 1.71300 53.9 16 -13.12580 0.70000 1.80610 33.3 17 216.78870 5.15430 18 28.70680 0.70000 1.71300 53.9 19 8.02540 5.91130 1.48749 70.4 20 -18.77270 2.869
- Table 12 (Zoom lens group data) Group Start surface Focal length Lens construction length Front principal point position Rear principal point position 1 1 69.79699 6.96580 -0.42501 2.26707 2 4 -21.92420 10.47840 -2.01550 -1.97491 3 10 -32.36192 0.70000 -0.03337 0.27862 4 12 18.53595 23.43400 4.88051 7.72468
- Table 13 (zoom lens group magnification) Group Start surface Wide angle Medium telephoto 1 1 0.00000 0.00000 0.00000 2 4 -0.48949 -0.57558 -0.72614 3 10 0.39885 0.39245 0.37315 4 12 -1.05664 -1.53197 -2.14241
- Table 14 (Surface data) Surface number r d nd vd Object ⁇ 1 48.34200 3.84910 1.48749 70.4 2 -457.33090 Variable 3 24.21430 0.80000 1.84666 23.8 4 11.67840 5.00920 5 -35.66 180 0.70000 1.80420 46.5 6 14.19300 1.91280 7 17.71510 3.50690 1.84666 23.8 8 -45.27970 Variable 9 -26.56060 0.70000 1.72916 54.7 10 212.53890 Variable 11 63.03960 1.70 140 1.62299 58.1 12 -51.30100 1.50000 13 (Aperture) ⁇ 0.50000 14 17.96920 3.50000 1.48749 70.4 15 -12.13830 0.70000 1.80610 33.3 16 -57.49770 3.91630 17 50.60930 0.80000 1.80420 46.5 18 23.50820 0.46370 19 42.60160 2.64460 1.48749 70.4 20 -14.20680 7.48610 21 * -9
- Table 18 (Zoom lens group data) Group Start surface Focal length Lens construction length Front principal point position Rear principal point position 1 1 89.90936 3.84910 0.24800 1.50298 2 3 -30.96581 11.92890 -4.04883 -5.33616 3 9 -32.33991 0.70000 0.04491 0.34059 4 11 20.24808 24.21210 4.37880 7.24290
- Table 19 (Zoom lens group magnification) Group Start surface Wide angle Medium telephoto 1 1 0.00000 0.00000 0.00000 2 3 -0.51399 -0.56518 -0.64634 3 9 0.32344 0.31944 0.31049 4 11 -0.96336 -1.48815 -2.24578
- Table 24 (Zoom lens group data) Group Start surface Focal length Lens construction length Front principal point position Rear principal point position 1 1 75.14899 7.99040 1.92412 4.42746 2 5 -23.94733 10.29090 -3.34002 -3.44835 3 11 -34.81307 0.70000 -0.03447 0.20752 4 13 18.89608 22.36960 3.79459 7.79886
- Table 25 (Zoom lens group magnification) Group Start surface Wide angle Medium telephoto 1 1 0.00000 0.00000 0.00000 2 5 -0.47347 -0.54829 -0.74231 3 11 0.39919 0.39213 0.36899 4 13 -1.01387 -1.54757 -2.10929
- Table 30 (Zoom lens group data) Group Start surface Focal length Lens configuration length Front principal point position Rear principal point position 1 1 73.70704 8.48790 2.10453 4.70655 2 5 -19.33088 9.49050 -1.03958 0.20119 3 11 -39.08066 0.70000 -0.11240 0.19859 4 13 18.50764 23.72790 4.33235 8.77998
- Table 31 (Zoom lens group magnification) Group Start surface Wide angle Medium telephoto 1 1 0.00000 0.00000 0.00000 2 5 -0.37730 -0.43263 -0.58175 3 11 0.49878 0.49319 0.47083 4 13 -1.03809 -1.58982 -2.15041
- Table 32 (Surface data) Surface number r d nd vd Object ⁇ 1 47.65040 1.20000 1.84666 23.8 2 31.61190 7.01310 1.71300 53.9 3 397.39840 Variable 4 43.46490 0.70000 1.71300 53.9 5 9.00310 6.16270 6 -29.86210 0.70000 1.71300 53.9 7 41.45870 0.15000 8 18.69810 3.51650 1.80518 25.5 9 -46.64210 Variable 10 -28.97190 0.70000 1.83400 37.3 11 169.53010 Variable 12 79.92270 1.62240 1.61800 63.4 13 -38.83920 1.30000 14 (Aperture) ⁇ 0.80000 15 17.89240 2.11780 1.71300 53.9 16 -27.84220 0.70000 1.80518 25.5 17 60.13520 7.20000 18 ⁇ 6.03890 19 * 22.18890 1.20000 1.52996 55.9 20 * 22.30780 0.80000 21 17.03250
- Table 36 (Zoom lens group data) Group Start surface Focal length Lens construction length Front principal point position Rear principal point position 1 1 83.92677 8.21310 -0.94662 2.57496 2 4 -32.20400 11.22920 -5.29793 -6.36303 3 10 -29.62079 0.70000 0.05562 0.37455 4 12 18.93137 27.39000 4.66837 7.58142
- Table 37 (Zoom lens group magnification) Group Start surface Wide angle Medium telephoto 1 1 0.00000 0.00000 0.00000 2 4 -0.63167 -0.74930 -1.13229 3 10 0.28769 0.27735 0.24666 4 12 -0.94558 -1.43857 -1.86235
- Table 38 (Surface data) Surface number r d nd vd Object ⁇ 1 125.96620 2.48990 1.48749 70.4 2 -239.10810 Variable 3 36.22200 0.70000 1.84666 23.8 4 10.02960 5.38210 5 -35.60770 0.70100 1.77250 49.6 6 28.46120 0.61150 7 20.39360 3.97510 1.84666 23.8 8 -31.87740 Variable 9 -25.61880 0.70000 1.62835 59.8 10 1244.97830 Variable 11 167.21930 1.21980 1.79084 47.7 12 -51.83980 1.25000 13 (Aperture) ⁇ 1.25000 14 11.76380 4.40060 1.59346 61.8 15 -48.71070 0.70000 1.79369 26.4 16 22.12980 7.05600 17 * 23.47810 1.47080 1.52996 55.8 18 * 42.01710 0.19930 19 51.63320 3.99290 1.51680 64.2 20 -7.5
- Table 42 (Zoom lens group data) Group Start surface Focal length Lens construction length Front principal point position Rear principal point position 1 1 169.61863 2.48990 0.57886 1.39111 2 3 -40.76153 11.36970 -8.79056 -11.86855 3 9 -39.94067 0.70000 0.00867 0.27888 4 11 21.78843 22.23940 3.13061 6.29724
- Table 43 (Zoom lens group magnification) Group Start surface Wide-angle Medium telephoto 2 3 -0.29939 -0.32057 -0.35746 3 9 0.33335 0.33148 0.32691 4 11 -0.85084 -1.34054 -2.04498
- Table 48 (Zoom lens group data) Group Start surface Focal length Lens construction length Front principal point position Rear principal point position 1 1 98.22479 3.53230 0.68695 1.83270 2 3 -29.44444 12.63640 -3.87543 -4.67425 3 10 -35.91427 0.70000 -0.07768 0.21645 4 12 19.90809 20.66170 3.42971 7.26639
- Table 49 (Zoom lens group magnification) Group Start surface Wide angle Medium telephoto 1 1 0.00000 0.00000 0.00000 2 3 -0.41732 -0.45516 -0.52679 3 10 0.36517 0.36212 0.35123 4 12 -0.96220 -1.49243 -2.23041
- the zoom lens system according to the present invention can be applied to a digital still camera, a digital video camera, a mobile phone device camera, a PDA (Personal Digital Assistance) camera, a surveillance camera in a surveillance system, a Web camera, an in-vehicle camera, etc. It is particularly suitable for a photographing optical system that requires high image quality, such as a digital still camera system and a digital video camera system.
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Abstract
Description
0.7<BFW/fW<3.0 ・・・(8)
ここで、
BFW:広角端における全系のバックフォーカス
fW:広角端における全系の焦点距離
である。
第1レンズ群G1は、物体側から像側へと順に、物体側に凸面を向けた負メニスカス形状の第1レンズ素子L1と、物体側に凸面を向けた正メニスカス形状の第2レンズ素子L2とからなる。第1レンズ素子L1と第2レンズ素子L2とは互いに接合されている。
第1レンズ群G1は、物体側から像側へと順に、物体側に凸面を向けた負メニスカス形状の第1レンズ素子L1と、両凸形状の第2レンズ素子とからなる。第1レンズ素子L1と第2レンズ素子L2とは互いに接合されている。
第1レンズ群G1は、両凸形状の第1レンズ素子L1からなる。
第1レンズ群G1は、物体側から像側へと順に、物体側に凸面を向けた負メニスカス形状の第1レンズ素子L1と、両凸形状の第2レンズ素子L2とからなる。
第1レンズ群G1は、物体側から像側へと順に、物体側に凸面を向けた負メニスカス形状の第1レンズ素子L1と、物体側に凸面を向けた正メニスカス形状の第2レンズ素子L2とからなる。
第1レンズ群G1は、物体側から像側へと順に、物体側に凸面を向けた負メニスカス形状の第1レンズ素子L1と、物体側に凸面を向けた正メニスカス形状の第2レンズ素子L2とからなる。第1レンズ素子L1と第2レンズ素子L2とは互いに接合されている。
第1レンズ群G1は、両凸形状の第1レンズ素子L1からなる。
第1レンズ群G1は、物体側から像側へと順に、両凸形状の第1レンズ素子L1からなる。
1.0<T4/fW<3.5 ・・・(1)
ここで、
T4:第4レンズ群の光軸方向の厚み(mm)、
fW:広角端における全系の焦点距離(mm)
である。
1.4<T4/fW ・・・(1’)
T4/fW<2.0 ・・・(1’’)
0.71<|D4WT/fW|<2.5 ・・・(2)
ここで、
D4WT:広角端から望遠端へのズーミング時における第4レンズ群の移動量(mm)、
fW:広角端における全系の焦点距離(mm)
である。
1.1<|D4WT/fW| ・・・(2’)
|D4WT/fW|<1.9 ・・・(2’’)
0.2<|fW/fF|<0.6 ・・・(3)
ここで、
fW:広角端における全系の焦点距離(mm)、
fF:フォーカシングレンズ群の焦点距離(mm)
である。
0.25<|fW/fF| ・・・(3’)
|fW/fF|<0.5 ・・・(3’’)
0.77<|D1/fW|<3.5 ・・・(4)
ここで、
D1:広角端から望遠端へのズーミング時における第1レンズ群の移動量(mm)、
fW:広角端における全系の焦点距離(mm)
である。
1.7<|D1/fW| ・・・(4’)
|D1/fW|<2.3 ・・・(4’’)
0.3<(D3WT-D4WT)/fW<1.5 ・・・(5)
ここで、
D3WT:広角端から望遠端へのズーミング時における第3レンズ群の移動量(mm)、
D4WT:広角端から望遠端へのズーミング時における第4レンズ群の移動量(mm)、
fW:広角端における全系の焦点距離(mm)
である。
0.6<(D3WT-D4WT)/fW ・・・(5’)
(D3WT-D4WT)/fW<1.1 ・・・(5’’)
0.1<(D3WM-D4WM)/fW<1.0 ・・・(6)
ここで、
D3WM:広角端から中間位置へのズーミング時における第3レンズ群の移動量(mm)、
D4WM:広角端から中間位置へのズーミング時における第4レンズ群の移動量(mm)、
fW:広角端における全系の焦点距離(mm)
である。
0.3<(D3WM-D4WM)/fW ・・・(6’)
(D3WM-D4WM)/fW<0.7 ・・・(6’’)
|fW/fP|<0.35 ・・・(7)
ここで、
fW:広角端における全系の焦点距離(mm)、
fP:第4レンズ群に含まれる樹脂レンズの焦点距離(mm)
である。
|fW/fP|<0.21 ・・・(7’)
0.7<BFW/fW<3.0 ・・・(8)
ここで、
BFW:広角端における全系のバックフォーカス(mm)
fW:広角端における全系の焦点距離(mm)
である。
1.1<BFW/fW ・・・(8’)
BFW/fW<1.8 ・・・(8’’)
1.50<nd1<1.72 ・・・(9)
ここで、
nd1:第1レンズ群を構成する正レンズ素子のd線に対する屈折率
である。
1.55<nd1 ・・・(9’)
nd1<1.65 ・・・(9’’)
50<νd1<75 ・・・(10)
ここで、
νd1:第1レンズ群を構成する正レンズ素子のアッベ数
である。
55<νd1 ・・・(10’)
νd1<60 ・・・(10’’)
図25は、実施の形態9に係るレンズ交換式デジタルカメラシステムの概略構成図である。
Z:光軸からの高さがhの非球面上の点から、非球面頂点の接平面までの距離、
h:光軸からの高さ、
r:頂点曲率半径、
κ:円錐定数、
An:n次の非球面係数
である。
表1 (像ぶれ補正サブレンズ群の移動量)
数値実施例1のズームレンズ系は、実施の形態1(図1)に対応する。ズームレンズ系の面データを表2に、非球面データを表3に、各種データを表4に、単レンズデータを表5に、ズームレンズ群データを表6に、ズームレンズ群倍率を表7に示す。
面番号 r d nd vd
物面 ∞
1 33.08030 1.20000 1.84666 23.8
2 24.35990 5.63190 1.58913 61.3
3 600.00000 可変
4 48.85560 0.70000 1.77250 49.6
5 8.67050 4.65400
6 -284.56240 0.70000 1.80420 46.5
7 17.22950 0.53940
8 14.00870 2.96900 1.84666 23.8
9 124.03830 可変
10 -28.80590 0.70000 1.77250 49.6
11 -96.36410 可変
12 320.76140 1.47460 1.69680 55.5
13 -49.62440 1.95000
14(絞り) ∞ 0.90000
15 16.64810 3.20120 1.69680 55.5
16 -14.47520 0.70000 1.80610 33.3
17 80.18650 6.24320
18* -81.87490 1.50000 1.54360 56.0
19* -32.88020 2.94230
20 21.60610 4.69330 1.51680 64.2
21 -8.33000 0.70000 1.71300 53.9
22 -132.10180 BF
像面 ∞
第18面
K= 0.00000E+00, A4= 1.33886E-04, A6= 3.24570E-06, A8=-7.64286E-08
第19面
K= 0.00000E+00, A4= 1.15737E-04, A6= 3.02082E-06, A8=-8.18542E-08
ズーム比 2.81403
広角 中間 望遠
焦点距離 14.4006 24.1581 40.5238
Fナンバー 3.62154 4.64730 5.71166
画角 39.8141 24.3766 14.7748
像高 10.8150 10.8150 10.8150
レンズ全長 82.0609 91.7923 107.6421
BF 24.09844 32.83383 44.27395
d3 0.4000 7.7101 15.6769
d9 4.2923 3.6969 4.6923
d11 11.8713 6.1526 1.6000
入射瞳位置 17.6966 29.5670 47.5893
射出瞳位置 -17.8621 -17.8621 -17.8621
前側主点位置 27.1550 42.2130 61.6843
後側主点位置 67.6603 67.6342 67.1183
レンズ 始面 焦点距離
1 1 -116.4931
2 2 42.9431
3 4 -13.7501
4 6 -20.1804
5 8 18.4244
6 10 -53.4301
7 12 61.7766
8 15 11.6021
9 16 -15.1611
10 18 99.9998
11 20 12.2898
12 21 -12.4987
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 70.00212 6.83190 -0.77084 1.89721
2 4 -15.72872 9.56240 -0.26444 1.33694
3 10 -53.43006 0.70000 -0.16915 0.13413
4 12 19.35651 24.30460 5.05052 8.87194
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 4 -0.31967 -0.37545 -0.46362
3 10 0.61744 0.61543 0.59900
4 12 -1.04226 -1.49355 -2.08458
数値実施例2のズームレンズ系は、実施の形態2(図4)に対応する。ズームレンズ系の面データを表8に、非球面データを表9に、各種データを表10に、単レンズデータを表11に、ズームレンズ群データを表12に、ズームレンズ群倍率を表13に示す。
面番号 r d nd vd
物面 ∞
1 34.81640 1.20000 1.84666 23.8
2 25.04840 5.76580 1.58913 61.3
3 -4281.80260 可変
4 36.49200 0.70000 1.77250 49.6
5 11.63370 3.94740
6 -57.69330 0.70000 1.83481 42.7
7 12.31460 1.84990
8 15.66210 3.28110 1.84666 23.8
9 -73.37440 可変
10 -23.99440 0.70000 1.80610 40.7
11 -303.00270 可変
12 252.00270 1.45400 1.69680 55.5
13 -50.93810 1.50000
14(絞り) ∞ 0.50000
15 16.36830 3.14470 1.71300 53.9
16 -13.12580 0.70000 1.80610 33.3
17 216.78870 5.15430
18 28.70680 0.70000 1.71300 53.9
19 8.02540 5.91130 1.48749 70.4
20 -18.77270 2.86970
21* -13.27990 1.50000 1.52996 55.8
22* -18.41360 BF
像面 ∞
第21面
K= 0.00000E+00, A4=-2.02386E-04, A6= 1.60650E-06, A8= 2.25837E-08
第22面
K= 0.00000E+00, A4=-1.85067E-04, A6= 1.44344E-06, A8= 0.00000E+00
ズーム比 2.81399
広角 中間 望遠
焦点距離 14.3988 24.1535 40.5180
Fナンバー 3.61905 4.67350 5.75507
画角 39.8048 24.2146 14.6513
像高 10.8150 10.8150 10.8150
レンズ全長 79.4123 88.7082 104.8128
BF 22.41253 31.22306 42.53823
d3 0.4000 7.0992 14.9969
d9 3.6995 3.1356 4.0995
d11 11.3221 5.6721 1.6000
入射瞳位置 18.6324 29.2744 47.0361
射出瞳位置 -18.5675 -18.5675 -18.5675
前側主点位置 27.9720 41.7110 60.6874
後側主点位置 65.0135 64.5546 64.2948
レンズ 始面 焦点距離
1 1 -111.7441
2 2 42.2914
3 4 -22.3825
4 6 -12.1015
5 8 15.5066
6 10 -32.3619
7 12 60.9309
8 15 10.6910
9 16 -15.3327
10 18 -15.8469
11 19 12.4312
12 21 -100.0004
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 69.79699 6.96580 -0.42501 2.26707
2 4 -21.92420 10.47840 -2.01550 -1.97491
3 10 -32.36192 0.70000 -0.03337 0.27862
4 12 18.53595 23.43400 4.88051 7.72468
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 4 -0.48949 -0.57558 -0.72614
3 10 0.39885 0.39245 0.37315
4 12 -1.05664 -1.53197 -2.14241
数値実施例3のズームレンズ系は、実施の形態3(図7)に対応する。ズームレンズ系の面データを表14に、非球面データを表15に、各種データを表16に、単レンズデータを表17に、ズームレンズ群データを表18に、ズームレンズ群倍率を表19に示す。
面番号 r d nd vd
物面 ∞
1 48.34200 3.84910 1.48749 70.4
2 -457.33090 可変
3 24.21430 0.80000 1.84666 23.8
4 11.67840 5.00920
5 -35.66180 0.70000 1.80420 46.5
6 14.19300 1.91280
7 17.71510 3.50690 1.84666 23.8
8 -45.27970 可変
9 -26.56060 0.70000 1.72916 54.7
10 212.53890 可変
11 63.03960 1.70140 1.62299 58.1
12 -51.30100 1.50000
13(絞り) ∞ 0.50000
14 17.96920 3.50000 1.48749 70.4
15 -12.13830 0.70000 1.80610 33.3
16 -57.49770 3.91630
17 50.60930 0.80000 1.80420 46.5
18 23.50820 0.46370
19 42.60160 2.64460 1.48749 70.4
20 -14.20680 7.48610
21* -9.29550 1.00000 1.52996 55.8
22* -11.99120 BF
像面 ∞
第21面
K= 0.00000E+00, A4=-2.19272E-04, A6= 5.23798E-07, A8= 9.40057E-08
A10=-2.69402E-10
第22面
K= 0.00000E+00, A4=-1.95346E-04, A6= 1.08805E-06, A8= 5.12532E-08
A10=-2.21837E-10
ズーム比 2.81406
広角 中間 望遠
焦点距離 14.3994 24.1557 40.5208
Fナンバー 3.62137 4.83172 5.61433
画角 39.9291 24.4774 14.8569
像高 10.8150 10.8150 10.8150
レンズ全長 81.9786 90.1888 107.9336
BF 22.78517 33.41098 48.75155
d2 0.4000 5.8570 12.7367
d8 3.4552 3.1240 3.5280
d10 14.6481 7.1067 2.2272
入射瞳位置 17.5060 24.1718 34.8191
射出瞳位置 -18.8672 -18.8672 -18.8672
前側主点位置 26.9275 37.1661 51.0577
後側主点位置 67.5792 66.0331 67.4128
レンズ 始面 焦点距離
1 1 89.9094
2 3 -27.4464
3 5 -12.5458
4 7 15.4334
5 9 -32.3399
6 11 45.6607
7 14 15.4496
8 15 -19.2200
9 17 -55.3160
10 19 22.1933
11 21 -89.5265
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 89.90936 3.84910 0.24800 1.50298
2 3 -30.96581 11.92890 -4.04883 -5.33616
3 9 -32.33991 0.70000 0.04491 0.34059
4 11 20.24808 24.21210 4.37880 7.24290
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 3 -0.51399 -0.56518 -0.64634
3 9 0.32344 0.31944 0.31049
4 11 -0.96336 -1.48815 -2.24578
数値実施例4のズームレンズ系は、実施の形態4(図10)に対応する。ズームレンズ系の面データを表20に、非球面データを表21に、各種データを表22に、単レンズデータを表23に、ズームレンズ群データを表24に、ズームレンズ群倍率を表25に示す。
面番号 r d nd vd
物面 ∞
1 37.32260 1.20000 1.84666 23.8
2 26.94840 1.42300
3 27.41330 5.36740 1.58913 61.3
4 -3741.80660 可変
5 62.26820 0.70000 1.77250 49.6
6 9.19270 5.02000
7 -59.93660 0.70000 1.77250 49.6
8 18.71730 0.15000
9 14.41930 3.72090 1.71736 29.5
10 -33.16660 可変
11* -17.14010 0.70000 1.52996 55.8
12 -244.91550 可変
13 204.25790 1.50000 1.71300 53.9
14 -53.73270 1.50000
15(絞り) ∞ 0.50000
16 15.70190 3.23680 1.62299 58.1
17 -14.70420 0.70000 1.80610 33.3
18 435.01800 6.90350
19* -236.86850 1.34750 1.52996 55.8
20* -90.55840 1.61150
21 17.26040 3.61070 1.48749 70.4
22 -13.93540 0.65960
23 -11.01420 0.80000 1.77250 49.6
24 -51.06640 BF
像面 ∞
第11面
K= 0.00000E+00, A4= 1.39196E-05, A6=-8.50233E-08, A8=-2.35288E-09
A10= 0.00000E+00
第19面
K= 0.00000E+00, A4= 5.70926E-04, A6=-7.94359E-07, A8= 4.53692E-08
A10=-1.69327E-10
第20面
K= 0.00000E+00, A4= 5.49448E-04, A6= 1.12374E-07, A8= 3.79362E-08
A10= 0.00000E+00
ズーム比 3.01496
広角 中間 望遠
焦点距離 14.4002 25.0041 43.4162
Fナンバー 3.62449 4.83510 5.56588
画角 39.8403 23.6095 13.7447
像高 10.8150 10.8150 10.8150
レンズ全長 80.9714 91.0636 109.9580
BF 23.48347 33.56829 44.18262
d4 0.4000 7.3024 18.7180
d10 3.4065 3.1847 4.1065
d12 12.3305 5.6573 1.6000
入射瞳位置 18.3357 28.1745 52.8511
射出瞳位置 -16.0456 -16.0456 -16.0456
前側主点位置 27.4900 40.5772 64.9702
後側主点位置 66.5711 66.0595 66.5418
レンズ 始面 焦点距離
1 1 -120.9218
2 3 46.2179
3 5 -14.0417
4 7 -18.3923
5 9 14.4828
6 11 -34.8131
7 13 59.8104
8 16 12.7077
9 17 -17.6325
10 19 275.7626
11 21 16.4400
12 23 -18.3384
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 75.14899 7.99040 1.92412 4.42746
2 5 -23.94733 10.29090 -3.34002 -3.44835
3 11 -34.81307 0.70000 -0.03447 0.20752
4 13 18.89608 22.36960 3.79459 7.79886
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 5 -0.47347 -0.54829 -0.74231
3 11 0.39919 0.39213 0.36899
4 13 -1.01387 -1.54757 -2.10929
数値実施例5のズームレンズ系は、実施の形態5(図13)に対応する。ズームレンズ系の面データを表26に、非球面データを表27に、各種データを表28に、単レンズデータを表29に、ズームレンズ群データを表30に、ズームレンズ群倍率を表31に示す。
面番号 r d nd vd
物面 ∞
1 34.58860 1.20000 1.84666 23.8
2 24.73020 1.68270
3 24.90680 5.60520 1.58913 61.3
4 647.45250 可変
5 38.78230 0.70000 1.77250 49.6
6 8.59640 5.02000
7 -70.88560 0.70000 1.77250 49.6
8 20.17810 0.15000
9 14.52510 2.92050 1.84666 23.8
10 -363.32930 可変
11 -24.35070 0.70000 1.80610 40.7
12 -108.62990 可変
13* 111.70590 1.50000 1.52996 55.8
14 -60.47860 1.50000
15(絞り) ∞ 0.50000
16 17.81270 3.21810 1.62041 60.3
17 -12.71740 0.70000 1.80610 33.3
18 -103.52570 6.48300
19* 97.52070 1.90600 1.52996 55.8
20* -130.55850 2.90870
21 16.81410 3.29850 1.48749 70.4
22 -21.38630 0.91360
23 -13.42820 0.80000 1.77250 49.6
24 -77.41170 BF
像面 ∞
第13面
K= 0.00000E+00, A4=-1.13941E-05, A6= 1.53340E-07, A8=-2.82359E-10
A10= 0.00000E+00
第19面
K= 0.00000E+00, A4= 4.63655E-04, A6=-1.84239E-07, A8= 5.83649E-08
A10=-3.63492E-10
第20面
K= 0.00000E+00, A4= 4.46471E-04, A6= 8.56266E-07, A8= 5.42542E-08
A10= 0.00000E+00
ズーム比 3.01501
広角 中間 望遠
焦点距離 14.3994 25.0028 43.4142
Fナンバー 3.61279 4.82536 5.52388
画角 39.8262 23.8400 13.8944
像高 10.8150 10.8150 10.8150
レンズ全長 80.9632 91.1399 109.9409
BF 22.77225 32.98361 43.35881
d4 0.4000 6.9522 18.4058
d10 3.4700 3.2891 4.1700
d12 11.9146 5.5087 1.6000
入射瞳位置 18.9921 28.4261 53.6396
射出瞳位置 -16.9442 -16.9442 -16.9442
前側主点位置 28.1709 40.9080 65.7984
後側主点位置 66.5638 66.1371 66.5267
レンズ 始面 焦点距離
1 1 -108.5383
2 3 43.8225
3 5 -14.4431
4 7 -20.2648
5 9 16.5549
6 11 -39.0807
7 13 74.2597
8 16 12.4627
9 17 -18.0480
10 19 105.6409
11 21 19.8721
12 23 -21.1461
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 73.70704 8.48790 2.10453 4.70655
2 5 -19.33088 9.49050 -1.03958 0.20119
3 11 -39.08066 0.70000 -0.11240 0.19859
4 13 18.50764 23.72790 4.33235 8.77998
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 5 -0.37730 -0.43263 -0.58175
3 11 0.49878 0.49319 0.47083
4 13 -1.03809 -1.58982 -2.15041
数値実施例6のズームレンズ系は、実施の形態6(図16)に対応する。ズームレンズ系の面データを表32に、非球面データを表33に、各種データを表34に、単レンズデータを表35に、ズームレンズ群データを表36に、ズームレンズ群倍率を表37に示す。
面番号 r d nd vd
物面 ∞
1 47.65040 1.20000 1.84666 23.8
2 31.61190 7.01310 1.71300 53.9
3 397.39840 可変
4 43.46490 0.70000 1.71300 53.9
5 9.00310 6.16270
6 -29.86210 0.70000 1.71300 53.9
7 41.45870 0.15000
8 18.69810 3.51650 1.80518 25.5
9 -46.64210 可変
10 -28.97190 0.70000 1.83400 37.3
11 169.53010 可変
12 79.92270 1.62240 1.61800 63.4
13 -38.83920 1.30000
14(絞り) ∞ 0.80000
15 17.89240 2.11780 1.71300 53.9
16 -27.84220 0.70000 1.80518 25.5
17 60.13520 7.20000
18 ∞ 6.03890
19* 22.18890 1.20000 1.52996 55.9
20* 22.30780 0.80000
21 17.03250 4.91090 1.51823 59.0
22 -12.23210 0.70000 1.71300 53.9
23 271.51730 BF
像面 ∞
第19面
K= 0.00000E+00, A4= 3.31973E-05, A6=-2.45043E-06, A8= 5.51240E-08
A10=-2.25928E-10
第20面
K= 0.00000E+00, A4= 8.10984E-05, A6=-2.10215E-06, A8= 3.77361E-08
A10=-3.90270E-12
ズーム比 3.02696
広角 中間 望遠
焦点距離 14.4217 25.0911 43.6540
Fナンバー 3.62324 4.49954 5.88048
画角 39.7747 23.7186 13.6860
像高 10.8150 10.8150 10.8150
レンズ全長 80.9602 91.1806 110.7909
BF 17.02390 26.35686 34.37962
d3 0.4000 8.4039 22.9412
d9 3.1446 3.1955 4.1494
d11 12.8594 5.6920 1.7884
入射瞳位置 19.6432 31.7755 67.0815
射出瞳位置 -22.4207 -22.4207 -22.4207
前側主点位置 28.7920 43.9598 77.1851
後側主点位置 66.5385 66.0895 67.1369
レンズ 始面 焦点距離
1 1 -114.8688
2 2 47.7868
3 4 -16.0617
4 6 -24.2471
5 8 16.9845
6 10 -29.6208
7 12 42.5156
8 15 15.5772
9 16 -23.5521
10 19 1747.2128
11 21 14.5724
12 22 -16.3994
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 83.92677 8.21310 -0.94662 2.57496
2 4 -32.20400 11.22920 -5.29793 -6.36303
3 10 -29.62079 0.70000 0.05562 0.37455
4 12 18.93137 27.39000 4.66837 7.58142
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 4 -0.63167 -0.74930 -1.13229
3 10 0.28769 0.27735 0.24666
4 12 -0.94558 -1.43857 -1.86235
数値実施例7のズームレンズ系は、実施の形態7(図19)に対応する。ズームレンズ系の面データを表38に、非球面データを表39に、各種データを表40に、単レンズデータを表41に、ズームレンズ群データを表42に、ズームレンズ群倍率を表43に示す。
面番号 r d nd vd
物面 ∞
1 125.96620 2.48990 1.48749 70.4
2 -239.10810 可変
3 36.22200 0.70000 1.84666 23.8
4 10.02960 5.38210
5 -35.60770 0.70100 1.77250 49.6
6 28.46120 0.61150
7 20.39360 3.97510 1.84666 23.8
8 -31.87740 可変
9 -25.61880 0.70000 1.62835 59.8
10 1244.97830 可変
11 167.21930 1.21980 1.79084 47.7
12 -51.83980 1.25000
13(絞り) ∞ 1.25000
14 11.76380 4.40060 1.59346 61.8
15 -48.71070 0.70000 1.79369 26.4
16 22.12980 7.05600
17* 23.47810 1.47080 1.52996 55.8
18* 42.01710 0.19930
19 51.63320 3.99290 1.51680 64.2
20 -7.51950 0.70000 1.72916 54.7
21 -30.69320 BF
像面 ∞
第17面
K= 0.00000E+00, A4= 4.20552E-05, A6= 5.78840E-08, A8=-4.38340E-08
A10= 1.83273E-09
第18面
K= 0.00000E+00, A4= 6.30249E-05, A6= 5.46816E-07, A8=-8.11423E-08
A10= 2.29221E-09
ズーム比 2.81421
広角 中間 望遠
焦点距離 14.4031 24.1619 40.5333
Fナンバー 3.62388 4.84412 5.63261
画角 39.8917 24.4804 14.8180
像高 10.8150 10.8150 10.8150
レンズ全長 82.4666 92.5112 115.3835
BF 24.38483 35.05450 50.40311
d2 0.4000 9.3938 22.5167
d8 3.6647 3.4747 3.6571
d10 17.2181 7.7892 2.0076
入射瞳位置 14.5565 23.8782 40.6156
射出瞳位置 -17.1640 -17.1640 -17.1640
前側主点位置 23.9666 36.8602 56.8330
後側主点位置 68.0635 68.3493 74.8502
レンズ 始面 焦点距離
1 1 169.6186
2 3 -16.5853
3 5 -20.3791
4 7 15.2201
5 9 -39.9407
6 11 50.1616
7 14 16.4113
8 15 -19.0886
9 17 97.7205
10 19 12.9995
11 20 -13.8350
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 169.61863 2.48990 0.57886 1.39111
2 3 -40.76153 11.36970 -8.79056 -11.86855
3 9 -39.94067 0.70000 0.00867 0.27888
4 11 21.78843 22.23940 3.13061 6.29724
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 3 -0.29939 -0.32057 -0.35746
3 9 0.33335 0.33148 0.32691
4 11 -0.85084 -1.34054 -2.04498
数値実施例8のズームレンズ系は、実施の形態8(図22)に対応する。ズームレンズ系の面データを表44に、非球面データを表45に、各種データを表46に、単レンズデータを表47に、ズームレンズ群データを表48に、ズームレンズ群倍率を表49に示す。
面番号 r d nd vd
物面 ∞
1 66.90250 3.53230 1.48749 70.4
2 -165.52440 可変
3 28.84180 0.70000 1.84666 23.8
4 12.48710 5.02000
5 -31.75500 0.70000 1.81851 34.9
6 15.02900 1.59560
7 18.56150 3.92080 1.84543 24.1
8 -21.99770 0.70000 1.66162 57.8
9 -47.64630 可変
10 -21.92360 0.70000 1.72916 54.7
11 -136.46730 可変
12 189.40140 1.50000 1.71300 53.9
13 -67.61670 1.50000
14(絞り) ∞ 0.50000
15 14.73190 3.50000 1.60944 60.9
16 -17.28610 0.70000 1.82654 30.7
17 294.83780 5.97210
18* 149.76140 1.58690 1.52996 55.8
19* -49.45160 1.26630
20 45.92840 3.03640 1.48749 70.4
21 -10.96480 0.30000
22 -10.27260 0.80000 1.77250 49.6
23 -44.47500 BF
像面 ∞
第18面
K= 0.00000E+00, A4= 2.91847E-04, A6= 2.12342E-06, A8= 8.05766E-08
A10=-4.84256E-10
第19面
K= 0.00000E+00, A4= 3.09003E-04, A6= 2.61600E-06, A8= 8.19300E-08
A10= 0.00000E+00
ズーム比 2.81442
広角 中間 望遠
焦点距離 14.4029 24.1620 40.5357
Fナンバー 3.64106 4.98324 5.83554
画角 39.8121 24.3055 14.6755
像高 10.8150 10.8150 10.8150
レンズ全長 80.9543 89.6295 109.2783
BF 25.66830 36.22412 50.91588
d2 0.4000 6.2659 15.0621
d9 3.4700 3.1838 4.1493
d11 13.8856 6.4253 1.6206
入射瞳位置 16.4616 23.3214 37.0215
射出瞳位置 -14.4572 -14.4572 -14.4572
前側主点位置 25.6946 35.9643 52.4223
後側主点位置 66.5514 65.4675 68.7426
レンズ 始面 焦点距離
1 1 98.2248
2 3 -26.5300
3 5 -12.3795
4 7 12.4594
5 8 -62.4422
6 10 -35.9143
7 12 70.0552
8 15 13.6141
9 16 -19.7356
10 18 70.3428
11 20 18.4808
12 22 -17.4699
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 98.22479 3.53230 0.68695 1.83270
2 3 -29.44444 12.63640 -3.87543 -4.67425
3 10 -35.91427 0.70000 -0.07768 0.21645
4 12 19.90809 20.66170 3.42971 7.26639
群 始面 広角 中間 望遠
1 1 0.00000 0.00000 0.00000
2 3 -0.41732 -0.45516 -0.52679
3 10 0.36517 0.36212 0.35123
4 12 -0.96220 -1.49243 -2.23041
101 カメラ本体
102 撮像素子
104 カメラマウント部
201 交換レンズ装置
202 ズームレンズ系
Claims (13)
- ズームレンズ系であって、
最も物体側に配置され、正のパワーを有する第1レンズ群と、
無限遠合焦状態から近接合焦状態へのフォーカシングに際して光軸に沿って移動するフォーカシングレンズ群と、
光軸と直交する方向に移動する少なくとも1枚のレンズ素子よりなる像ぶれ補正サブレンズ群と、
前記フォーカシングレンズ群及び前記像ぶれ補正サブレンズ群より像側に配置される開口絞りとを備え、
前記フォーカシングレンズ群と、前記像ぶれ補正サブレンズ群と、前記開口絞りとが隣接しており、
以下の条件を満足する、ズームレンズ系:
0.7<BFW/fW<3.0 ・・・(8)
ここで、
BFW:広角端における全系のバックフォーカス
fW:広角端における全系の焦点距離
である。 - 物体側から像側へと順に、
前記第1レンズ群と、
負のパワーを有する第2レンズ群と、
負のパワーを有する第3レンズ群と、
正のパワーを有する第4レンズ群とを含む、請求項1に記載のズームレンズ系。 - ズーミングに際して、前記第1レンズ群が光軸に沿って移動する、請求項1に記載のズームレンズ系。
- ズーミングに際して、前記第4レンズ群が光軸に沿って移動する、請求項2に記載のズームレンズ系。
- 前記第3レンズ群が前記フォーカシングレンズ群である、請求項2に記載のズームレンズ系。
- 前記フォーカシングレンズ群が1枚のレンズ素子のみからなる、請求項1に記載のズームレンズ系。
- 前記像ぶれ補正サブレンズ群は、前記第4レンズ群を構成する複数のレンズ素子の一部よりなる、請求項2に記載のズームレンズ系。
- 前記像ぶれ補正サブレンズ群が1枚のレンズ素子のみからなる、請求項1に記載のズームレンズ系。
- 以下の条件を満足する、請求項2に記載のズームレンズ系:
0.71<|D4WT/fW|<2.5 ・・・(2)
ここで、
D4WT:広角端から望遠端へのズーミング時における第4レンズ群の移動量、
fW:広角端における全系の焦点距離
である。 - 以下の条件を満足する、請求項1に記載のズームレンズ系:
0.2<|fW/fF|<0.6 ・・・(3)
ここで、
fW:広角端における全系の焦点距離、
fF:フォーカシングレンズ群の焦点距離
である。 - 以下の条件を満足する、請求項1に記載のズームレンズ系:
0.77<|D1/fW|<3.5 ・・・(4)
ここで、
D1:広角端から望遠端へのズーミング時における第1レンズ群の移動量、
fW:広角端における全系の焦点距離
である。 - 請求項1に記載のズームレンズ系と、
前記ズームレンズ系が形成する光学像を受光して、電気的な画像信号に変換する撮像センサとを含むカメラ本体と接続可能なレンズマウント部とを備える、交換レンズ装置。 - 請求項1に記載のズームレンズ系を含む交換レンズ装置と、
前記交換レンズ装置とカメラマウント部を介して着脱可能に接続され、前記ズームレンズ系が形成する光学像を受光して、電気的な画像信号に変換する撮像センサを含むカメラ本体とを備える、カメラシステム。
Priority Applications (3)
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US13/393,544 US20120162361A1 (en) | 2010-02-10 | 2011-02-01 | Zoom Lens System, Interchangeable Lens Apparatus, and Camera System |
CN201180003156XA CN102472887A (zh) | 2010-02-10 | 2011-02-01 | 变焦透镜系统、可更换镜头装置及相机系统 |
JP2011553739A JPWO2011099248A1 (ja) | 2010-02-10 | 2011-02-01 | ズームレンズ系、交換レンズ装置、及びカメラシステム |
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JP (1) | JPWO2011099248A1 (ja) |
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Cited By (4)
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JP2015191055A (ja) * | 2014-03-27 | 2015-11-02 | 株式会社ニコン | 変倍光学系、撮像装置及び変倍光学系の製造方法 |
JP2015191059A (ja) * | 2014-03-27 | 2015-11-02 | 株式会社ニコン | 変倍光学系、撮像装置及び変倍光学系の製造方法 |
JP2019124884A (ja) * | 2018-01-19 | 2019-07-25 | 株式会社タムロン | ズームレンズ及び撮像装置 |
US10663704B2 (en) | 2014-03-27 | 2020-05-26 | Nikon Corporation | Zoom lens, imaging device and method for manufacturing the zoom lens |
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JPH05232410A (ja) * | 1992-02-18 | 1993-09-10 | Canon Inc | 防振機能を有した変倍光学系 |
JPH0727978A (ja) * | 1993-07-12 | 1995-01-31 | Nikon Corp | 防振機能を備えたズームレンズ |
JPH09230241A (ja) * | 1996-02-27 | 1997-09-05 | Minolta Co Ltd | 手ぶれ補正機能を有するズームレンズ |
JP2009251115A (ja) * | 2008-04-02 | 2009-10-29 | Panasonic Corp | ズームレンズ系、交換レンズ装置、及びカメラシステム |
-
2011
- 2011-02-01 US US13/393,544 patent/US20120162361A1/en not_active Abandoned
- 2011-02-01 CN CN201180003156XA patent/CN102472887A/zh active Pending
- 2011-02-01 JP JP2011553739A patent/JPWO2011099248A1/ja active Pending
- 2011-02-01 WO PCT/JP2011/000540 patent/WO2011099248A1/ja active Application Filing
Patent Citations (4)
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JPH05232410A (ja) * | 1992-02-18 | 1993-09-10 | Canon Inc | 防振機能を有した変倍光学系 |
JPH0727978A (ja) * | 1993-07-12 | 1995-01-31 | Nikon Corp | 防振機能を備えたズームレンズ |
JPH09230241A (ja) * | 1996-02-27 | 1997-09-05 | Minolta Co Ltd | 手ぶれ補正機能を有するズームレンズ |
JP2009251115A (ja) * | 2008-04-02 | 2009-10-29 | Panasonic Corp | ズームレンズ系、交換レンズ装置、及びカメラシステム |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015191055A (ja) * | 2014-03-27 | 2015-11-02 | 株式会社ニコン | 変倍光学系、撮像装置及び変倍光学系の製造方法 |
JP2015191059A (ja) * | 2014-03-27 | 2015-11-02 | 株式会社ニコン | 変倍光学系、撮像装置及び変倍光学系の製造方法 |
US10663704B2 (en) | 2014-03-27 | 2020-05-26 | Nikon Corporation | Zoom lens, imaging device and method for manufacturing the zoom lens |
JP2019124884A (ja) * | 2018-01-19 | 2019-07-25 | 株式会社タムロン | ズームレンズ及び撮像装置 |
Also Published As
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JPWO2011099248A1 (ja) | 2013-06-13 |
CN102472887A (zh) | 2012-05-23 |
US20120162361A1 (en) | 2012-06-28 |
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