WO2014069077A1 - Objectif à mise au point interne - Google Patents

Objectif à mise au point interne Download PDF

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Publication number
WO2014069077A1
WO2014069077A1 PCT/JP2013/072331 JP2013072331W WO2014069077A1 WO 2014069077 A1 WO2014069077 A1 WO 2014069077A1 JP 2013072331 W JP2013072331 W JP 2013072331W WO 2014069077 A1 WO2014069077 A1 WO 2014069077A1
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WIPO (PCT)
Prior art keywords
lens
group
inner focus
lens group
conditional expression
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PCT/JP2013/072331
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English (en)
Japanese (ja)
Inventor
隆彦 坂井
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株式会社タムロン
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Publication of WO2014069077A1 publication Critical patent/WO2014069077A1/fr

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • 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
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G03B2205/0015—Movement of one or more optical elements for control of motion blur by displacing one or more optical elements normal to the optical axis

Definitions

  • the present invention relates to a small, high-performance inner focus lens capable of moving image shooting.
  • Patent Documents 1 and 2 Many inner focus type lenses that can be used for photographic cameras and video cameras have been proposed (see, for example, Patent Documents 1 and 2).
  • Each of the inner focus lenses described in Patent Documents 1 and 2 has, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a positive refractive power.
  • the third lens group is disposed, and focusing is performed by moving the second lens group.
  • Patent Documents 1 and 2 are both assumed to be telephoto lenses.
  • This type of conventional lens including the inner focus lens described in each of the above patent documents, can be used as a standard lens having a focal length of about 50 mm in terms of a 35 mm camera, and enables good movie shooting. There was nothing wrong.
  • Patent Document 2 In recent years, there has been a strong demand for downsizing of the image pickup apparatus, and therefore, a lens having a small size is desired. However, the inner focus lens described in Patent Document 2 cannot be said to be downsized in the entire optical system, and is not suitable for a small imaging device.
  • the present invention eliminates the problems caused by the prior art described above, and has a focal length that can be used as a standard lens.
  • the object is to provide a lens.
  • it is an object of the present invention to provide an inner focus type lens having a small and high imaging performance, having a vibration-proof group with a small movement amount for image blur correction.
  • an inner focus lens includes a first lens group including an aperture stop and having a positive refractive power, which is arranged in order from the object side, and negative refraction.
  • a second lens group having a power and a third lens group having a positive refractive power, the optical axis directions of the first lens group and the third lens group are fixed, and the second lens group is irradiated with light.
  • the focusing is performed by moving along the axis, and the following conditional expression is satisfied.
  • ⁇ 1 is the principal ray incident angle of the maximum field angle ray incident on the most object side surface of the second lens group in the infinite object focusing state
  • LS1 is the aperture stop and the second lens in the infinite object focusing state.
  • the distance from the group, f indicates the focal length of the entire optical system.
  • an inner focus type lens that has a focal length that can be used as a standard lens and that is capable of capturing a good moving image and that is small and has high imaging performance.
  • the inner focus type lens according to the present invention is characterized in that, in the above invention, the following conditional expression is satisfied. (2) 0.50 ⁇ f1 / f ⁇ 0.80
  • f1 represents the focal length of the first lens group.
  • the inner focus type lens according to the present invention is characterized in that, in the above invention, the following conditional expression is satisfied. (3) 1.00 ⁇ FI ⁇ f1 / f ⁇ 1.40 However, FI indicates the F number of the entire optical system in the infinite object focusing state.
  • an inner focus lens having a small size, a large aperture, and high imaging performance.
  • the inner focus lens according to the present invention is the lens according to any one of the above-mentioned inventions, wherein the third lens group is moved in a direction substantially perpendicular to the optical axis to cause image blurring when the optical system vibrates. It includes an anti-vibration group that performs correction, and satisfies the following conditional expression. (4) 1.33 ⁇
  • ⁇ vr represents the imaging magnification of the image stabilizing group
  • ⁇ r represents the combined image forming magnification of the entire lens disposed on the image side from the image stabilizing group.
  • an inner focus type lens having a small and high imaging performance having a vibration-proof group with a small movement amount for image blur correction.
  • the inner focus type lens according to the present invention is characterized in that, in any one of the above inventions, the following conditional expression is satisfied. (5) -3.00 ⁇ r1 / f ⁇ 0.00
  • r1 represents the radius of curvature of the most object side surface of the entire optical system.
  • an inner focus lens that has a focal length that can be used as a standard lens, that can perform good moving image shooting, and that is small and has high imaging performance. Play.
  • a small inner focus type lens having a high image forming performance and having a vibration proof group with a small movement amount for image blur correction.
  • FIG. 1 is a cross-sectional view along the optical axis showing the configuration of the inner focus lens according to the first embodiment.
  • 2 is a longitudinal aberration diagram with respect to e line of the inner focus lens according to Example 1.
  • FIG. 3 is a lateral aberration diagram with respect to the e-line in the in-focus object focusing state of the inner focus lens according to the first example.
  • FIG. 4 is a cross-sectional view along the optical axis showing the configuration of the inner focus lens according to the second embodiment.
  • FIG. 5 is a longitudinal aberration diagram of the inner focus lens according to Example 2 with respect to the e line.
  • FIG. 6 is a lateral aberration diagram with respect to the e-line in the in-focus object focused state of the inner focus lens according to the second example.
  • FIG. 7 is a cross-sectional view along the optical axis showing the configuration of the inner focus lens according to the third embodiment.
  • FIG. 8 is a longitudinal aberration diagram with respect to e line of the inner focus lens according to Example 3.
  • FIG. 9 is a lateral aberration diagram with respect to the e-line in the in-focus object focused state of the inner focus lens according to the third example.
  • An inner focus type lens includes a first lens group including an aperture stop and having a positive refractive power, a second lens group having a negative refractive power, and a positive refractive power, which are arranged in order from the object side. And a third lens group.
  • the optical axis directions of the first lens group and the third lens group are fixed, and focusing is performed by moving the second lens group along the optical axis.
  • An object of the present invention is to provide an inner focus type lens that has a focal length that can be used as a standard lens and that is capable of capturing a good moving image and that is small and has high imaging performance. Therefore, in order to achieve such an object, various conditions as shown below are set in addition to the above characteristics.
  • the principal ray incident angle of the maximum field angle ray incident on the most object side surface of the second lens group in the infinite object focusing state is ⁇ 1
  • the aperture stop in the infinite object focusing state is
  • the distance from the second lens group is LS1 and the focal length of the entire optical system is f
  • the following conditional expression is satisfied. (1) 50 ⁇ 1 / (tan ( ⁇ 1) / LS1 / f) ⁇ 250
  • Conditional expression (1) indicates a condition for realizing an inner focus type lens that can perform good movie shooting while having a focal length that can be used as a standard lens.
  • conditional expression (1) the incident angle of the light beam to the second lens group which is the focus group is limited, and the image height when the second lens group moves on the optical axis (at the time of focusing) It becomes possible to suppress fluctuations and to perform good moving image shooting.
  • conditional expression (1) If the lower limit of conditional expression (1) is not reached, the total length of the optical system is extended, and it is difficult to reduce the size of the optical system. On the other hand, if the upper limit in conditional expression (1) is exceeded, the variation in image height due to focusing increases, making it difficult to perform good moving image shooting.
  • conditional expression (1) can anticipate a more preferable effect, if the range shown next is satisfied.
  • the imaging performance can be further improved while sufficiently miniaturizing the optical system.
  • conditional expression (1a) satisfies the following range, a further preferable effect can be expected.
  • (1b) 100 ⁇ 1 / (tan ( ⁇ 1) / LS1 / f) ⁇ 180
  • f1 is the focal length of the first lens unit and f is the focal length of the entire optical system.
  • Conditional expression (2) indicates a condition for ensuring good imaging performance while reducing the size of the inner focus lens.
  • conditional expression (2) If the lower limit of conditional expression (2) is not reached, the focal length of the first lens group becomes short, and the spherical aberration becomes excessive on the under side. In addition, the paraxial imaging magnification after the second lens group is increased, the rear lens diameter is enlarged, and the radial direction of the optical system is increased. On the other hand, if the upper limit of conditional expression (2) is exceeded, the focal length of the first lens group becomes long and the entire length of the optical system is extended.
  • conditional expression (2) can anticipate a more preferable effect, if the range shown next is satisfied. (2a) 0.55 ⁇ f1 / f ⁇ 0.79 By satisfying the range defined by this conditional expression (2a), the imaging performance can be further improved while sufficiently reducing the size of the optical system.
  • the F number of the entire optical system in the infinite object focusing state is FI
  • the focal length of the first lens group is f1
  • the focal length of the entire optical system is f. It is preferable that the following conditional expression is satisfied. (3) 1.00 ⁇ FI ⁇ f1 / f ⁇ 1.40
  • Conditional expression (3) shows conditions for realizing an inner focus lens having a small size, a large aperture, and high imaging performance. By satisfying conditional expression (3), it is possible to realize an inner focus lens that is bright and has excellent imaging performance while shortening the overall length of the optical system.
  • conditional expression (3) If the lower limit of conditional expression (3) is not reached, the focal length of the first lens group becomes shorter and the F-number becomes smaller. It is not preferable. On the other hand, if the upper limit in conditional expression (3) is exceeded, the back focus of the optical system becomes long, and the downsizing of the optical system is hindered. In addition, it becomes difficult to widen the angle of the optical system.
  • a part of the lenses constituting the third lens group has a function as an anti-vibration group.
  • the anti-vibration group performs correction of image blur caused when the optical system vibrates due to camera shake or the like by moving (eccentric) in a direction substantially perpendicular to the optical axis.
  • the imaging magnification of the image stabilizing group is ⁇ vr
  • the combined image forming magnification of the entire lens arranged on the image side from the image stabilizing group is ⁇ r
  • the following conditional expression is satisfied. It is preferable to satisfy. (4) 1.33 ⁇
  • conditional expression (4) indicates a condition for appropriately setting the moving amount of the image stabilizing group at the time of image blur correction to achieve a reduction in the radial direction of the optical system and to shorten the total length of the optical system. Is.
  • conditional expression (4) If the lower limit of conditional expression (4) is not reached, the combined imaging magnification of the entire lens disposed on the image side from the image stabilizing group increases, so that the back focus of the optical system becomes long and the optical system becomes smaller. Be inhibited. On the other hand, if the upper limit in conditional expression (4) is exceeded, the amount of movement of the image stabilizing group at the time of image stabilization is increased, and the radial direction of the optical system is enlarged.
  • conditional expression (4) can anticipate a more preferable effect, if the range shown next is satisfied. (4a) 1.40 ⁇
  • satisfying the range defined by the conditional expression (4a) it is possible to further suppress the movement amount of the image stabilizing group at the time of image stabilization and further reduce the size of the optical system.
  • conditional expression (4a) satisfies the following range, a further preferable effect can be expected.
  • (4b) 1.69 ⁇
  • r1 is the radius of curvature of the most object side surface of the entire optical system and f is the focal length of the entire optical system. (5) -3.00 ⁇ r1 / f ⁇ 0.00
  • Conditional expression (5) shows conditions for maintaining good imaging performance while reducing the size of the entire optical system.
  • an inner focus type lens having a focal length that can be used as a standard lens it is indispensable to sufficiently correct aberrations, particularly distortion aberrations, that become prominent due to widening the angle of view. Therefore, by satisfying conditional expression (5), it becomes possible to dispose a lens having a concave surface on the object side on the most object side of the optical system without hindering the downsizing of the optical system. Can be corrected sufficiently.
  • conditional expression (5) If the lower limit of conditional expression (5) is not reached, the image plane fluctuation during focusing increases, which is not preferable. On the other hand, if the upper limit of conditional expression (5) is exceeded, the radial direction of the optical system enlarges as the entrance pupil diameter increases, which is not preferable.
  • conditional expression (5) can anticipate a more preferable effect, if the range shown next is satisfied.
  • conditional expression (5a) ⁇ 1.50 ⁇ r1 / f ⁇ ⁇ 0.35
  • conditional expression (5a) satisfies the following range, a further preferable effect can be expected.
  • (5b) -1.00 ⁇ r1 / f ⁇ ⁇ 0.70
  • an inner focus type lens having a focal length that can be used as a standard lens and having a small size and high imaging performance.
  • a small-sized inner focus type lens having a high image forming performance and having a vibration proof group with a small movement amount for image blur correction it is possible to realize a small-sized inner focus type lens having a high image forming performance and having a vibration proof group with a small movement amount for image blur correction.
  • FIG. 1 is a cross-sectional view along the optical axis showing the configuration of the inner focus lens according to the first embodiment.
  • the inner focus type lens includes a first lens group G 11 having a positive refractive power, a second lens group G 12 having a negative refractive power, and a third lens having a positive refractive power in order from an object side (not shown).
  • a lens group G 13, is formed is disposed.
  • a light receiving surface of an image sensor such as a CCD or a CMOS is disposed on the image plane IMG.
  • the first lens group G 11 includes, in order from the object side, a negative lens L 111, a positive lens L 112, a positive lens L 113, and the aperture stop S for defining a predetermined diameter, is formed are disposed.
  • the negative lens L 111 and the positive lens L 112 are cemented.
  • the object side surface of the positive lens L 113 is a composite aspherical surface is formed. Optical axis direction of the first lens group G 11 is fixed.
  • the second lens group G 12 includes, is composed of a negative lens L 121.
  • the second lens group G 12 includes, by moving toward the image plane IMG side from the object side along the optical axis to perform focusing from infinity in-focus state to a closest distance object in-focus state.
  • the third lens group G 13 is constituted in order from the object side, a positive lens L 131, a positive lens L 132, a negative lens L 133, a positive lens L 134, is the arrangement.
  • the positive lens L 132 and the negative lens L 133 are cemented.
  • An aspheric surface is formed on both surfaces of the positive lens L134 .
  • Optical axis direction of the third lens group G 13 is fixed.
  • the positive lens L 131 has a function as an anti-vibration group. That is, by moving (decentering) the positive lens L 131 in a direction substantially perpendicular to the optical axis, image blur that occurs during vibration of the optical system due to camera shake is corrected.
  • S and M in the astigmatism diagram represent aberrations with respect to the sagittal image surface and the meridional image surface, respectively.
  • (a) is a lateral aberration curve from 0 mm to 14.20 mm in real image height (Y ′) at the time of non-shake correction
  • (b) is a light beam through the positive lens L 131 (anti-shake group) at the time of shake correction.
  • FIG. 4 is a cross-sectional view along the optical axis showing the configuration of the inner focus lens according to the second embodiment.
  • the inner focus type lens includes a first lens group G 21 having a positive refractive power, a second lens group G 22 having a negative refractive power, and a third lens having a positive refractive power in order from an object side (not shown).
  • a lens group G 23, is formed are disposed. Note that a light receiving surface of an image sensor such as a CCD or a CMOS is disposed on the image plane IMG.
  • the first lens group G 21 includes, in order from the object side, a negative lens L 211 , a positive lens L 212 , a positive lens L 213, and an aperture stop S that defines a predetermined aperture.
  • the negative lens L 211 and the positive lens L 212 are cemented.
  • a composite aspherical surface is formed on the object side surface of the positive lens L213 .
  • Optical axis direction of the The first lens group G 21 includes, is fixed.
  • the second lens group G 22 includes, is composed of a negative lens L 221.
  • the second lens group G 22 includes, by moving toward the image plane IMG side from the object side along the optical axis to perform focusing from infinity in-focus state to a closest distance object in-focus state.
  • the third lens group G 23 is constituted in order from the object side, a positive lens L 231, a positive lens L 232, a negative lens L 233, a positive lens L 234, is the arrangement.
  • the positive lens L 232 and the negative lens L 233 are cemented.
  • aspherical surfaces are formed on both surfaces of the positive lens L234 .
  • Optical axis direction of the third lens group G 23 is fixed.
  • the positive lens L 231 has a function as an anti-vibration group. That is, by moving the positive lens L 231 in a direction substantially perpendicular to the optical axis (eccentricity), image blur that occurs during vibration of the optical system due to camera shake is corrected.
  • S and M in the astigmatism diagram represent aberrations with respect to the sagittal image surface and the meridional image surface, respectively.
  • (a) is a lateral aberration curve from 0 mm to 14.20 mm in real image height (Y ′) at the time of non-shake correction
  • (b) is a light beam through the positive lens L 231 (anti-shake group) at the time of shake correction.
  • FIG. 7 is a cross-sectional view along the optical axis showing the configuration of the inner focus lens according to the third embodiment.
  • the inner focus type lens includes a first lens group G 31 having a positive refractive power, a second lens group G 32 having a negative refractive power, and a third lens having a positive refractive power in order from an object side (not shown).
  • a lens group G 33 is formed are disposed.
  • a light receiving surface of an image sensor such as a CCD or a CMOS is disposed on the image plane IMG.
  • the first lens group G 31 includes a negative lens L 311 , a positive lens L 312 , a positive lens L 313, and an aperture stop S that defines a predetermined aperture in order from the object side.
  • the negative lens L 311 and the positive lens L 312 are cemented.
  • a composite aspherical surface is formed on the object side surface of the positive lens L313 .
  • the optical axis direction of the first lens group G 31 is fixed.
  • the second lens group G 32 is constituted by a negative lens L 321. Aspherical surfaces are formed on both surfaces of the negative lens L321 .
  • the second lens group G 32 is, by moving toward the image plane IMG side from the object side along the optical axis to perform focusing from infinity in-focus state to a closest distance object in-focus state.
  • the third lens group G 33 is constituted in order from the object side, a positive lens L 331, a positive lens L 332, a negative lens L 333, a positive lens L 334, is the arrangement.
  • the positive lens L 332 and the negative lens L 333 are cemented. Further, aspherical surfaces are formed on both surfaces of the positive lens L334 .
  • Optical axis direction of the third lens group G 33 is fixed.
  • the positive lens L 331 has a function as an anti-vibration group. That is, by moving the positive lens L 331 in the direction substantially perpendicular to the optical axis (eccentricity), correction of image blur that occurs during vibration of the optical system due to camera shake or the like is performed.
  • S and M in the astigmatism diagram represent aberrations with respect to the sagittal image surface and the meridional image surface, respectively.
  • (a) is a lateral aberration curve from 0 mm to 14.20 mm in real image height (Y ′) at the time of non-shake correction
  • (b) is a light beam through the positive lens L 331 (anti-shake group) at the time of shake correction.
  • the unit of length is all “mm”, and the unit of angle is “°”.
  • each of the above aspheric shapes has a depth of the aspheric surface Z, a curvature c (1 / r), a height from the optical axis h, a cone coefficient k, 4th order, 6th order, 8th order, 10th order.
  • the following aspheric coefficients are A, B, C, and D, respectively, and the traveling direction of light is positive, the following aspheric coefficients are expressed by the following equations.
  • an example of an inner focus type lens having a focal length of about 50 mm in terms of a 35 mm camera, an optical image stabilization function, and a small, large aperture and high imaging performance is shown. According to this inner focus lens, it is possible to shoot a good moving image.
  • the inner focus type lens shown in each of the above embodiments can achieve high imaging performance while reducing the size of the entire optical system while reducing the weight of the focus group by configuring the focus group with a single lens. Further, it is possible to obtain a high imaging performance while reducing the weight of the image stabilization group by configuring the image stabilization group with a single lens and suppressing the movement amount of the image stabilization group during image blur correction.
  • the inner focus type lens shown in each of the above-described embodiments uses an aspherical lens or a cemented lens as appropriate, so that various aberrations are favorably corrected and the imaging performance is improved.
  • the inner focus type lens according to the present invention is useful for small-sized imaging devices such as a photographic camera and a video camera, and exhibits an excellent effect particularly when used for the purpose of moving image shooting.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Adjustment Of Camera Lenses (AREA)

Abstract

L'invention concerne un objectif à mise au point interne qui est caractérisé par une distance focale permettant d'utiliser l'objectif comme un objectif standard, qui permet une excellente photographie d'images mouvantes, qui est compact et qui présente d'excellentes performances d'imagerie. Ledit objectif à mise au point interne est composé d'un premier groupe (G11) de lentilles doté d'un diaphragme (S) d'ouverture et d'une puissance optique positive, d'un deuxième groupe (G12) de lentilles doté d'une puissance optique négative, et d'un troisième groupe (G13) de lentilles doté d'une puissance optique positive, ceux-ci étant disposés dans cet ordre en partant du côté objet. Le présent objectif à mise au point interne effectue la mise au point en déplaçant le deuxième groupe (G12) de lentilles le long de l'axe optique. Le troisième groupe (G13) de lentilles comprend une lentille positive (L131) faisant fonction de groupe antivibratoire. Lorsque le présent objectif à mise au point interne satisfait des conditions prédéterminées, l'objectif à mise au point interne ainsi réalisé peut être utilisé comme un objectif standard dans la photographie d'images mouvantes, est compact et présente d'excellentes performances d'imagerie.
PCT/JP2013/072331 2012-10-30 2013-08-21 Objectif à mise au point interne WO2014069077A1 (fr)

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JP2012-239551 2012-10-30
JP2012239551A JP2014089352A (ja) 2012-10-30 2012-10-30 インナーフォーカス式レンズ

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Publication number Priority date Publication date Assignee Title
JP6440450B2 (ja) 2013-11-08 2018-12-19 オリンパス株式会社 結像レンズ系及びそれを備えた撮像装置
JP6388853B2 (ja) 2015-07-10 2018-09-12 富士フイルム株式会社 撮像レンズおよび撮像装置
KR101981775B1 (ko) * 2017-05-10 2019-05-27 주식회사 삼양옵틱스 렌즈 광학계 및 이를 포함한 촬영 장치

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JPH09236742A (ja) * 1996-02-29 1997-09-09 Minolta Co Ltd 光学系
JPH09236744A (ja) * 1996-02-29 1997-09-09 Minolta Co Ltd 光学系
JP2000227546A (ja) * 1999-02-04 2000-08-15 Asahi Optical Co Ltd 中望遠レンズ
JP2006058840A (ja) * 2004-07-23 2006-03-02 Konica Minolta Opto Inc 撮像光学系、撮像レンズ装置及びデジタル機器
JP2012002999A (ja) * 2010-06-16 2012-01-05 Canon Inc 撮影光学系及びそれを有する撮像装置
JP2012027349A (ja) * 2010-07-27 2012-02-09 Olympus Imaging Corp 結像光学系及びそれを用いた撮像装置
JP2012189637A (ja) * 2011-03-08 2012-10-04 Tamron Co Ltd 固定焦点レンズ
JP2013161076A (ja) * 2012-02-03 2013-08-19 Sigma Corp インナーフォーカス式望遠レンズ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09236742A (ja) * 1996-02-29 1997-09-09 Minolta Co Ltd 光学系
JPH09236744A (ja) * 1996-02-29 1997-09-09 Minolta Co Ltd 光学系
JP2000227546A (ja) * 1999-02-04 2000-08-15 Asahi Optical Co Ltd 中望遠レンズ
JP2006058840A (ja) * 2004-07-23 2006-03-02 Konica Minolta Opto Inc 撮像光学系、撮像レンズ装置及びデジタル機器
JP2012002999A (ja) * 2010-06-16 2012-01-05 Canon Inc 撮影光学系及びそれを有する撮像装置
JP2012027349A (ja) * 2010-07-27 2012-02-09 Olympus Imaging Corp 結像光学系及びそれを用いた撮像装置
JP2012189637A (ja) * 2011-03-08 2012-10-04 Tamron Co Ltd 固定焦点レンズ
JP2013161076A (ja) * 2012-02-03 2013-08-19 Sigma Corp インナーフォーカス式望遠レンズ

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