JP5151635B2 - PHOTOGRAPHIC LENS, OPTICAL DEVICE EQUIPPED WITH THIS PHOTOGRAPHIC LENS, AND IMAGE-FORMING METHOD - Google Patents

Description

  The present invention relates to a photographic lens, an optical apparatus including the photographic lens, and an imaging method.

Conventionally, there is a so-called Gaussian lens as a lens type in which a F-number is relatively bright and high optical performance can be easily obtained in a photographic camera, a video camera, etc., and is still widely used (for example, Patent Document 1). reference).
JP-A-1-30211

  However, the conventional lens has a problem that the correction of chromatic aberration, particularly the secondary spectrum, is insufficient.

  The present invention has been made in view of such a problem, and has an F number of about 1.2, can satisfactorily correct various aberrations, particularly chromatic aberration, and has high optical performance over the entire screen. An object of the present invention is to provide a photographing lens.

In order to solve the above problems, the imaging lens according to a first aspect of the present invention, in order from the object side, a front lens group having positive refractive power, positive substantially the rear lens group having a refractive power The front lens group includes two lens groups . The front lens group includes a first lens component having a positive refractive power and a second lens component having a positive refractive power on the object side from the aperture stop. The group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side, and the distance between the front lens group and the rear lens group changes when focusing on an object at a short distance from infinity. , The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the amount of movement of the front lens unit when focusing from infinity to a photographing magnification of −0.01 times Is set to γF1, and the magnification is set to -0.01x from infinity. The amount of movement of the rear lens unit at the time of the [gamma] R1, the movement amount of the front lens group when focusing on infinity photographing magnification -0.07 times the Ganmaefu2, if the infinity photographing magnification -0.07 times When the amount of movement of the rear lens group during focusing is γR2 , the following formula (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
0.35 <γR2 / γF2 ≦ 0.4416
It is configured to satisfy the following conditions.

The photographic lens according to the second aspect of the present invention includes, in order from the object side , substantially two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power. The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power in order from the most object side, and the rear lens group is in order from the object side. The lens has a cemented lens in which a positive lens and a negative lens are bonded, and when focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes, and d of the first lens component The Abbe number with respect to the line is ν1, the Abbe number with respect to the d-line of the second lens component is ν2, the amount of movement of the front lens unit when focusing from infinity to the photographing magnification of −0.01 times is γF1, and the image is taken from infinity Rear lens when focusing at a magnification of -0.01x The moving amount of the [gamma] R1, the movement amount of the front lens group when focusing on infinity photographing magnification -0.07 times the Ganmaefu2, side lens after the time of focusing from infinity photographing magnification -0.07 times When the movement amount of the group is γR2 , the following formula (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
0.35 <γR2 / γF2 ≦ 0.4416
It is configured to satisfy the following conditions.

The photographic lens according to the third aspect of the present invention includes, in order from the object side, substantially two lens groups of a front lens group having a positive refractive power and a rear lens group having a positive refractive power. The front lens group has a first lens component having positive refractive power and a second lens component having positive refractive power on the object side from the aperture stop, and the rear lens group is closer to the object side. In order to have a cemented lens in which a positive lens and a negative lens are bonded together in order to focus on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes, and the first lens component The Abbe number with respect to the d-line is ν1, the Abbe number with respect to the d-line of the second lens component is ν2, the amount of movement of the front lens group when focusing from infinity to the photographing magnification of −0.01 times is γF1, and from infinity Rear lens when focusing at a magnification of -0.01x The amount of movement of the group is γR1, the refractive index for the d-line of the negative lens arranged closest to the image side of the cemented lens is n9, the Abbe number is ν9, and the d-line of the positive lens bonded to the object side of the negative lens When the refractive index for n is n8 and the Abbe number is ν8,
(Ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
n8> n9
ν8> ν9
It is configured to satisfy the following conditions.

Further, the photographic lens according to the fourth aspect of the present invention includes, in order from the object side, substantially two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power. The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power in order from the most object side, and the rear lens group is in order from the object side. The lens has a cemented lens in which a positive lens and a negative lens are bonded, and when focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes, and d of the first lens component The Abbe number with respect to the line is ν1, the Abbe number with respect to the d-line of the second lens component is ν2, the amount of movement of the front lens unit when focusing from infinity to the photographing magnification of −0.01 times is γF1, and the image is taken from infinity Rear lens when focusing at a magnification of -0.01x ΓR1, the refractive index for the d-line of the negative lens arranged closest to the image side of the cemented lens is n9, the Abbe number is ν9, and the d-line of the positive lens bonded to the object side of the negative lens When the refractive index is n8 and the Abbe number is ν8,
(Ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
n8> n9
ν8> ν9
It is configured to satisfy the following conditions.

Further, the photographing lens according to the fifth aspect of the present invention includes, in order from the object side, substantially two lens groups of a front lens group having a positive refractive power and a rear lens group having a positive refractive power. The front lens group has a first lens component having positive refractive power and a second lens component having positive refractive power on the object side from the aperture stop, and the rear lens group is closer to the object side. In order, there is a cemented lens in which a positive lens and a negative lens are bonded together, and a front negative lens component having negative refractive power in order from the object side between the second lens component and the cemented lens, an aperture stop, and A rear negative lens component having a negative refractive power and a rear positive lens component having a positive refractive power, and a convex surface facing the object side between the second lens component and the front negative lens component With a third meniscus lens component that focuses on objects from infinity to close range The distance between the front lens group and the rear lens group changes, the Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and shooting is performed from infinity. When the amount of movement of the front lens unit when focusing at a magnification of −0.01 is γF1, and the amount of movement of the rear lens unit when focusing at a photographing magnification of −0.01 from infinity is γR1, Next formula
(Ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
It is configured to satisfy the following conditions.

The photographic lens according to the sixth aspect of the present invention includes, in order from the object side, substantially two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power. The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power in order from the most object side, and the rear lens group is in order from the object side. A positive lens and a negative lens are bonded to each other, and a front negative lens component having negative refractive power in order from the object side between the second lens component and the cemented lens, an aperture stop, A rear negative lens component having a negative refractive power and a rear positive lens component having a positive refractive power, and a convex surface facing the object side between the second lens component and the front negative lens component It has a third lens component with a meniscus shape and focuses on objects at close distances from infinity Sometimes, the distance between the front lens group and the rear lens group changes, the Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the imaging magnification from infinity. When the amount of movement of the front lens unit when focusing at -0.01 times is γF1, and the amount of movement of the rear lens unit when focusing from infinity to a photographing magnification of -0.01 times is γR1, formula
(Ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
It is configured to satisfy the following conditions.

In the photographic lenses according to the first and second aspects of the present invention, the refractive index with respect to the d-line of the negative lens arranged closest to the image side of the cemented lens is n9, and the Abbe number is ν9. When the refractive index of the bonded positive lens with respect to the d-line is n8 and the Abbe number is ν8, the following expression n8> n9
ν8> ν9
It is preferable to satisfy the following conditions.
In the third to sixth photographic lenses according to the present invention, when focusing from infinity to a photographing magnification of -0.07, the amount of movement of the front lens unit is γF2, and the amount of movement of the rear lens unit is γR2. Then, the following formula 0.35 <γR2 / γF2 <0.50
It is preferable to satisfy the following conditions.

The photographing lenses according to the first to fourth aspects of the present invention include, in order from the object side, a front negative lens component having negative refractive power, an aperture stop, and a negative lens between the second lens component and the cemented lens. It is preferable to have a rear negative lens component having a refractive power and a rear positive lens component having a positive refractive power.

The photographing lenses according to the first to fourth aspects of the present invention preferably have a meniscus third lens component having a convex surface facing the object side between the second lens component and the front negative lens component.

  In such a photographing lens, the front negative lens component is a meniscus fourth lens component having a convex surface facing the object side, and the rear negative lens component is a biconcave fifth lens component. Is preferred.

  In addition, such a photographing lens preferably has a seventh lens component having a positive refractive power between the sixth lens component as the rear positive lens component and the cemented lens.

  Further, in such a photographing lens, it is preferable that the rear negative lens component and the rear positive lens component are a cemented lens that is bonded together.

Further, in such a photographing lens, when the curvature radius of the image side surface of the front negative lens component is r8 and the focal length of the entire photographing lens system is f, the following expression 0.30 <r8 / f <0 .50
It is preferable to satisfy the following conditions.

Further, in such a photographing lens, when the refractive index of the first lens component with respect to the d-line is n1, and the refractive index of the second lens component with respect to the d-line is n2, the following expression (n1 + n2) / 2> 1.49.
It is preferable to satisfy the following conditions.

  Further, in such a photographing lens, it is preferable that the front lens group and the rear lens group move along the optical axis at different movement amount ratios when focusing on an object at a short distance from the intermediate photographing distance.

  In such a photographing lens, it is preferable that the first lens component and the second lens component each have a meniscus shape with a convex surface facing the object side.

Also, in such a photographing lens, when the focal length of the rear lens group is fR and the focal length of the entire photographing lens system is f, the following expression 1.00 <fR / f <2.00
It is preferable to satisfy the following conditions.

An optical apparatus according to the present invention includes any one of the above-described photographing lenses that forms an image of an object at a predetermined position.
Further, the imaging method according to the present invention includes, in order from the object side , substantially two lens groups of a front lens group having a positive refractive power and a rear lens group having a positive refractive power, The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power on the object side from the aperture stop , and the rear lens group is in order from the object side. When having a cemented lens in which a positive lens and a negative lens are bonded and focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes, and the d-line of the first lens component The Abbe number with respect to d is the ν1, the Abbe number with respect to the d-line of the second lens component is ν2, the amount of movement of the front lens group when focusing from infinity to a photographing magnification of −0.01 times is γF1, and the photographing magnification from infinity -Rear lens group shift when focusing at -0.01x The amount and [gamma] R1, the movement amount of the front lens group when focusing on infinity photographing magnification -0.07 times the Ganmaefu2, the rear lens group when focusing on infinity photographing magnification -0.07 times When the movement amount is γR2 , the following formula (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
0.35 <γR2 / γF2 ≦ 0.4416
This is performed using a photographic lens that satisfies the above conditions.

  When the photographing lens according to the present invention, the optical apparatus equipped with the photographing lens, and the imaging method are configured as described above, the F number is about 1.2, and various aberrations, particularly chromatic aberration, of the entire screen are improved. It is possible to correct the photographic lens with high optical performance over the entire screen.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the photographing lens SL has a front lens group GF having a positive refractive power and a rear lens group GR having a positive refractive power in order from the object side along the optical axis. The front lens group GF includes, in order from the most object side, a first lens component G1 having a positive refractive power and a second lens component G2 having a positive refractive power, and the rear lens group GR is In order from the object side, a cemented lens G89 in which a positive lens G8 and a negative lens G9 are bonded is provided. By adopting such a configuration, the photographing lens SL can be a large-diameter lens having an effective diameter of about 25 to 30 mm. Further, by disposing the cemented lens G89 in which the positive lens G8 and the negative lens G9 are bonded to the most image side lens, the lens disposed on the image side also has an achromatic effect, and chromatic aberration can be corrected as a whole. In particular, fluctuations in chromatic aberration during focusing can be reduced. Further, by using such a cemented lens, it is possible to prevent total reflection of light rays and to allow light rays to pass through the lenses satisfactorily.

  As a specific embodiment of the photographing lens SL, as shown in FIG. 1, in addition to the first lens component G1, the second lens component G2, and the cemented lens G89, the second lens component G2 is used. Between the image side and the object side of the cemented lens G89, in order from the object side, a third meniscus lens component G3 having a convex surface facing the object side, a front negative lens component G4 having negative refractive power, and an aperture A cemented lens G56 in which a stop S, a rear negative lens component G5 having negative refractive power and a rear positive lens component G6 having positive refractive power are bonded together, and a seventh lens component G7 having positive refractive power As a whole, it is desirable that the lens is composed of 9 lenses in 7 groups.

  The photographing lens SL is a modification of a so-called Gauss type lens. In the Gaussian type, the lens has a substantially symmetrical shape before and after the stop, so that correction of distortion and the like is easy due to the symmetry. Further, the photographing lens SL has three lens components arranged on the object side of the negative meniscus lens on the object side from the aperture stop S (the front negative lens component G4 in FIG. 1) (in FIG. The third lens components G1 to G3), the respective radii of curvature are increased, and the occurrence of spherical aberration is reduced.

  In the photographing lens SL, the first lens component G1 and the second lens component G2 each preferably have a meniscus shape with a convex surface facing the object side. The front negative lens component G4, which is the fourth lens component, preferably has a meniscus shape with a convex surface facing the object side. The rear negative lens component G5, which is the fifth lens component, preferably has a biconcave shape. Furthermore, the positive lens G8 of the cemented lens G89 disposed on the most image side preferably has a biconvex shape.

  As described above, when the third lens component G3 having positive or negative refractive power is disposed between the second lens component G2 and the front negative lens component G4, the third lens component G3 is 1 A two-sheet configuration is preferred. When the seventh lens component G7 is disposed between the rear negative lens component G5 and the cemented lens G89, the seventh lens component G7 preferably has one or two lenses and has a positive refractive power. Is preferred.

  Now, conditions for configuring such a photographing lens SL will be described. First, when the photographing lens SL is focused on an object at a short distance from infinity, the front lens group GF and the rear lens group GR are arranged so that the distance between the front lens group GF and the rear lens group GR is increased. Moving toward the object side along the optical axis with different movement amounts, the Abbe number of the first lens component G1 with respect to the d-line is ν1, the Abbe number of the second lens component G2 with respect to the d-line is ν2, and the imaging magnification from infinity − When the amount of movement of the front lens group GF when focusing on 0.01 times is γF1, and the amount of movement of the rear lens group GR when focusing from infinity to a photographing magnification of −0.01 times is γR1, It is desirable to satisfy the following conditional expressions (1) and (2). When the first lens component G1 or the second lens component G2 is composed of a cemented lens, the Abbe number is an average value of the Abbe numbers of the lenses constituting the cemented lens.

(Ν1 + ν2) / 2> 60 (1)
0.35 <γR1 / γF1 <0.80 (2)

  Conditional expression (1) is a conditional expression for defining a combination of optical material characteristics of the first lens component G1 having a positive refractive power and the second lens component G2 having a positive refractive power in the front lens group GF. It is. If the lower limit of conditional expression (1) is not reached, in the modified Gaussian type photographing lens SL in which the lens component closest to the object has a great influence on the occurrence of chromatic aberration, the correction of lateral chromatic aberration is insufficient, which is favorable. Since it becomes difficult to maintain performance, it is not preferable. In order to secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (1) to 61. In order to further secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (1) to 63. Furthermore, in order to further secure the effect of the present invention, it is more preferable to set the lower limit of conditional expression (1) to 65.

  Conditional expression (2) is a conditional expression for defining an appropriate range of the moving ratio in focusing at the intermediate shooting distance between the front lens group GF and the rear lens group GR. Exceeding the upper limit value of conditional expression (2) is not preferable because coma aberration and field curvature are excessively corrected. In order to secure the effect of the present invention, it is preferable to set the upper limit of conditional expression (2) to 0.77. In order to further secure the effect of the present invention, it is preferable to set the upper limit of conditional expression (2) to 0.74. Furthermore, in order to further secure the effect of the present invention, it is more preferable to set the upper limit of conditional expression (2) to 0.71. On the other hand, if the lower limit value of conditional expression (2) is not reached, correction of coma aberration and field curvature becomes difficult, which is not preferable. In order to secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (2) to 0.39. In order to further secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (2) to 0.43. Furthermore, in order to further secure the effect of the present invention, it is more preferable to set the lower limit of conditional expression (2) to 0.47.

  In the photographing lens SL, when the refractive index of the first lens component G1 with respect to the d-line is n1, and the refractive index of the second lens component G2 with respect to the d-line is n2, the following conditional expression (3) is satisfied. It is desirable to do. In addition, when the 1st lens component G1 or the 2nd lens component G2 is comprised with the cemented lens, the refractive index becomes an average value of the refractive index of the lens which comprises the said cemented lens.

(N1 + n2) / 2> 1.49 (3)

  Conditional expression (3) is a conditional expression for defining the refractive indices of the two meniscus lens components G1 and G2 on the object side. By satisfying conditional expression (3), coma and lateral chromatic aberration can be corrected satisfactorily. In order to secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (3) to 1.52. In order to further secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (3) to 1.55. Furthermore, in order to further secure the effect of the present invention, it is more preferable to set the lower limit of conditional expression (3) to 1.59.

  In the photographing lens SL according to the present embodiment, the front lens group GF and the rear lens group GR move along the optical axis at different movement amount ratios when focusing on a short-distance object from the intermediate photographing distance. It is desirable. With such a configuration, it is possible to satisfactorily correct spherical aberration and curvature of field in the entire photographing distance from infinity to a short distance. The aperture stop S moves along the optical axis together with the front negative lens component G4 or the rear negative lens component G5 during focusing.

  Further, in the present photographing lens SL, when focusing from infinity to a photographing magnification of -0.07, when the movement amount of the front lens group GF is γF2 and the movement amount of the rear lens group GR is γR2, It is desirable that the conditional expression (4) shown below is satisfied.

0.35 <γR2 / γF2 <0.50 (4)

  Conditional expression (4) is a conditional expression for defining an appropriate range of the movement ratio in focusing at the time of short-distance shooting of the front lens group GF and the rear lens group GR. Exceeding the upper limit value of conditional expression (4) is not preferable because coma aberration and field curvature are excessively corrected. In order to secure the effect of the present invention, it is preferable to set the upper limit of conditional expression (4) to 0.48. In order to further secure the effect of the present invention, it is more preferable to set the upper limit of conditional expression (4) to 0.46. On the other hand, if the lower limit of conditional expression (4) is not reached, correction of coma and field curvature is difficult, which is not preferable. In order to secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (4) to 0.36. In order to further secure the effect of the present invention, it is more preferable to set the lower limit of conditional expression (4) to 0.37.

  Further, in the photographing lens SL, the negative lens G9 disposed closest to the image side of the cemented lens G89 has a refractive index of d9 and an Abbe number of ν9, and is a positive lens bonded to the object side of the negative lens G9. It is desirable that the following conditional expressions (5) and (6) are satisfied, where n8 is the refractive index of the G8 d-line and ν8 is the Abbe number.

n8> n9 (5)
ν8> ν9 (6)

  Conditional expressions (5) and (6) are conditional expressions for defining the refractive power and the Abbe number of the positive lens G8 and the negative lens G9 of the cemented lens G89 arranged on the most image side. By satisfying conditional expression (5), an increase in Petzval sum can be prevented. Moreover, satisfactory chromatic aberration can be corrected by satisfying conditional expression (6). Here, if a material having a high refractive index is used for the positive lens G8 in order to suppress the occurrence of coma and spherical aberration, the Abbe number becomes small, and the negative lens G9 has a high refractive index for chromatic aberration correction. . For this reason, the Petzval sum may be increased. However, the cemented lens G89 of the rear lens group GR is configured to satisfy the conditional expressions (5) and (6) at the same time, so that chromatic aberration correction and Petzval sum can be achieved even when a high refractive index material is used. Can be prevented from becoming large. In order to further secure the effect of the present embodiment, in the conditional expression (6), the Abbe number ν8 of the positive lens G8 is 20 or more larger than the Abbe number ν9 of the negative lens G9. It is preferable to satisfy (a).

ν8-ν9> 20 (a)

  In the present photographing lens SL, the curvature radius of the image side surface of the front negative lens component G4 (in FIG. 1, the eighth lens surface counted from the object side) is set to r8, and the focal length of the entire photographing lens SL system. It is desirable that the following conditional expression (7) is satisfied, where is f.

0.30 <r8 / f <0.50 (7)

  Conditional expression (7) is a conditional expression for defining the ratio of the radius of curvature of the image-side surface of the front negative lens component G4 to the focal length f. Exceeding the upper limit of conditional expression (7) is not preferable because the Petzval sum becomes large and it becomes difficult to correct curvature of field. In order to secure the effect of the present invention, it is preferable to set the upper limit of conditional expression (7) to 0.45. In order to further secure the effect of the present invention, it is preferable to set the upper limit of conditional expression (7) to 0.40. Furthermore, in order to further secure the effect of the present invention, it is more preferable to set the upper limit of conditional expression (7) to 0.35. On the other hand, if the lower limit of conditional expression (7) is not reached, it will be difficult to correct coma. Further, the power of the rear lens group GR becomes strong, and the spherical aberration cannot be corrected satisfactorily as a whole, which is not preferable. In order to secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (7) to 0.31. In order to further secure the effect of the present invention, it is more preferable to set the lower limit of conditional expression (7) to 0.32.

  The photographing lens SL preferably satisfies the following conditional expression (8), where fR is the focal length of the rear lens group GR and f is the focal length of the entire photographing lens SL system.

1.00 <fR / f <2.00 (8)

  Conditional expression (8) is a conditional expression for defining a ratio between the focal length of the rear lens group GR and the focal length of the entire photographing lens SL. If the upper limit of conditional expression (8) is exceeded, the entire photographic lens SL will be enlarged. Further, when focusing at a finite distance, the fluctuation of the image plane becomes large, and it becomes difficult to correct aberrations from infinity to a short distance. Moreover, the amount of movement for focusing becomes large, and the lens barrel structure becomes large, which is not preferable. In order to secure the effect of the present invention, it is preferable to set the upper limit of conditional expression (8) to 1.90. In order to further secure the effect of the present invention, it is preferable to set the upper limit of conditional expression (8) to 1.80. In order to further secure the effect of the present invention, it is more preferable to set the upper limit of conditional expression (8) to 1.60. On the other hand, if the lower limit value of conditional expression (8) is not reached, correction of spherical aberration becomes difficult, which is not preferable. In order to secure the effect of the present invention, it is preferable to set the lower limit of conditional expression (8) to 1.10. In order to further secure the effect of the present invention, it is more preferable to set the lower limit of conditional expression (8) to 1.20.

  In addition, the photographing lens SL is a lens that constitutes a lens system by combining a blur detection system that detects blurring of the lens system and a driving unit in the lens system in order to prevent photographing failure due to image blur caused by camera shake or the like. By decentering the whole or part of one lens group as a shift lens group, image blurring (fluctuation in image plane position) caused by blurring of the lens system detected by the blur detection system is corrected. The image blur can be corrected by driving the shift lens group by the driving means and shifting the image. As described above, the photographic lens SL of the present embodiment can function as a so-called vibration-proof optical system.

  In this embodiment, the lens system is composed of two movable groups. However, another lens group is added between the lens groups, or the lens system is adjacent to the image side or the object side of the lens system. It is also possible to add these lens groups.

  The photographic lens SL according to this embodiment has a focal length in terms of 35 mm film size of about 60 to 150 mm, preferably about 80 to 90 mm. In addition, the photographic lens SL according to the present embodiment is more preferably about 10 to 30 mm in a state where the distance (back focus) from the image side surface of the positive lens G9 arranged closest to the image side to the image surface is the smallest. desirable.

  The contents described below can be appropriately adopted as long as the optical performance is not impaired.

  First, the lens surface may be an aspherical surface. At this time, any one of an aspheric surface by grinding, a glass mold aspheric surface in which glass is formed into an aspheric shape by a mold, and a composite aspheric surface in which resin is formed in an aspheric shape on the surface of the glass may be used. The image side surface of the front negative lens component G4 (negative meniscus lens L4 in FIG. 1), the object side surface of the rear negative lens component G5 (biconcave lens L5 in FIG. 1), and the rear positive lens component G6 (FIG. 1, at least one of the image side surface of the biconvex lens L6) and one of the object side surface of the positive lens G8 (biconvex lens L8 in FIG. 1) is preferably an aspherical surface. The lens surface may be a diffractive surface, and the lens may be a gradient index lens (GRIN lens) or a plastic lens.

  The aperture stop S is preferably disposed between the front negative lens component G4 (negative meniscus lens L4 in FIG. 1) and the rear negative lens component G5 (biconcave lens L5 in FIG. 1). The role may be substituted by a lens frame without providing a member as an aperture stop.

  Furthermore, an antireflection film having a high transmittance in a wide wavelength region is applied to each lens surface, thereby reducing flare and ghost and achieving high optical performance with high contrast.

  9 and 10 show a configuration of an electronic still camera 1 (hereinafter simply referred to as camera 1) as an optical apparatus including the above-described photographing lens SL. In this camera 1, when a power button (not shown) is pressed, a shutter (not shown) of the photographing lens SL is opened, and light from a subject (not shown) is condensed by the photographing lens SL, and an image pickup device arranged on the image plane I. The image is formed on C (for example, film, CCD, CMOS, etc.). The subject image formed on the image sensor C is displayed on the liquid crystal monitor 2 disposed behind the camera 1. The photographer determines the composition of the subject image while looking at the liquid crystal monitor 2, and then presses the release button 3 to photograph the subject image with the image sensor C and records and saves it in a memory (not shown).

  The camera 1 includes an auxiliary light emitting unit 4 that emits auxiliary light when the subject is dark, and a wide (W) − when zooming the zoom optical system from the wide-angle end state (W) to the telephoto end state (T). A tele (T) button 5 and function buttons 6 used for setting various conditions of the camera 1 are arranged. Further, the photographing lens SL can be applied to an interchangeable lens that can be attached to and detached from the camera body.

  In addition, in order to explain the present invention in an easy-to-understand manner, the configuration requirements of the embodiment have been described, but it goes without saying that the present invention is not limited to this.

  Embodiments of the present invention will be described below with reference to the drawings. 1, 3, 5, and 7 show the configuration and refractive power distribution of the photographic lenses SL (SL1 to SL4) according to each embodiment, and focusing from an infinitely focused state to a short-distance focused state. It is sectional drawing which shows the mode of the movement of each lens group in the change of a state. As shown in these drawings, the photographic lenses SL1 to SL4 according to the present embodiment are all arranged in order from the object side along the optical axis in the order from the object side in the order of the front lens group GF (first lens) as described above. 1 to 7 lens components G1 to G7) and a rear lens group GR (junction lens G89) having a positive refractive power, and these are first lens components having a positive refractive power in order from the object side. G1, a second lens component G2 having positive refractive power, a meniscus third lens component G3 having a convex surface facing the object side, and a front negative lens component (fourth lens component) G4 having negative refractive power A cemented lens in which an aperture stop S, a rear negative lens component having a negative refractive power (fifth lens component) G5 and a rear positive lens component having a positive refractive power (sixth lens component) G6 are bonded together G56 and 7th lens with positive refractive power And component G7, a cemented lens G89 bonding the positive lens G8 and a negative lens G9, composed of a filter group FL. Here, the filter group FL includes a low-pass filter, an infrared cut filter, and the like. When the focusing state changes from the infinite focusing state to the short-distance focusing state (that is, focusing), the front lens group GF and the rear lens group GR move with respect to the image plane, and the front lens group GF The distance from the rear lens group GR changes. As shown in FIG. 10, the image plane I is imaged on an image sensor C (for example, film, CCD, CMOS, etc.).

[First embodiment]
FIG. 1 is a diagram showing the configuration of the taking lens SL1 according to the first embodiment of the present invention. In the photographic lens SL1 of FIG. 1, the first lens component G1 is composed of a positive meniscus lens L1 having a convex surface facing the object side, and the second lens component G2 is composed of a positive meniscus lens L2 having a convex surface facing the object side. The third lens component G3 is composed of a positive meniscus lens L3 having a convex surface facing the object side, and the front negative lens component (fourth lens component) G4 is composed of a negative meniscus lens L4 having a convex surface facing the object side. The cemented lens G56 is configured by bonding a rear negative lens component (fifth lens component) G5 composed of a biconcave lens L5 and a rear positive lens component (sixth lens component) G6 composed of a biconvex lens L6. The seventh lens component G7 is composed of a biconvex lens L7, and the cemented lens G89 is composed of an eighth lens G8 composed of a biconvex lens L8 and a biconcave lens L9. Constructed by bonding the ninth lens G9. The configuration of the photographic lens SL1 is the same in the following embodiments.

  Further, focusing from infinity to a short distance object is performed by separately extending the front lens group GF and the rear lens group GR to the object side. The aperture stop S is disposed in the front lens group GF (between the front negative lens component G4 and the rear negative lens component G5 as described above), and the front lens is used for focusing from infinity to a close object. Move together with group GF. The same applies to the following embodiments.

  Table 1 below lists values of specifications of the first embodiment. In Table 1, f represents the focal length, FNO represents the F number, 2ω represents the angle of view, and Bf represents the back focus. Furthermore, the surface number is the order of the lens surfaces from the object side along the direction of travel of the light beam, the surface interval is the distance on the optical axis from each optical surface to the next optical surface, and the refractive index and Abbe number are each The value for the d-line (λ = 587.6 nm) is shown. The total lens length represents a distance on the optical axis from the first surface of the lens surface to the image plane I when focusing on infinity. Here, “mm” is generally used for the focal length, the radius of curvature, the surface interval, and other length units listed in all the following specifications, but the optical system is proportionally enlarged or reduced. However, the same optical performance can be obtained, and the present invention is not limited to this. The radius of curvature of 0.0000 indicates a plane, and the refractive index of air of 1.0000 is omitted. The description of these symbols and the description of the specification table are the same in the following embodiments.

(Table 1)
f = 32.00
F.NO = 1.24
2ω = 29.86
Image height = 8.50
Total length = 56.13

Surface number Curvature radius Surface spacing Refractive index Abbe number
1 35.6570 5.50 1.59319 67.87
2 329.8920 0.30
3 22.5026 4.30 1.59319 67.87
4 63.9805 0.20
5 21.4046 5.10 1.81600 46.63
6 21.5939 1.30
7 57.8235 1.30 1.67270 32.11
8 10.5445 4.90
9 0.0000 4.00 (Aperture stop S)
10 -11.2740 1.30 1.69895 30.13
11 56.3778 4.35 1.88300 40.77
12 -19.0149 0.15
13 585.3078 2.85 1.75500 52.29
14 -33.3610 (d14)
15 40.4389 4.30 1.88300 40.77
16 -29.4995 1.40 1.76182 26.56
17 880.5274 (d17)
18 0.0000 0.50 1.51680 64.12
19 0.0000 4.60
20 0.0000 1.87 1.51680 64.12
21 0.0000 0.30
22 0.0000 0.70 1.51680 64.12
23 0.0000 (Bf)

  In the first embodiment, the axial air distance d14 between the front lens group GF and the rear lens group GR and the axial air distance d17 between the rear lens group GR and the filter group FL change during focusing. Table 2 below shows the distances between the groups in the infinite focus state, the intermediate shooting distance focus state, and the short distance focus state. The intermediate shooting distance is a shooting distance of a shooting magnification of -0.01 times, and the short distance is a shooting distance of a shooting magnification of -0.07 times. These values are the same for the following embodiments.

(Table 2)
Infinity Intermediate shooting distance Short distance
d14 1.2000 1.4261 3.2405
d17 5.1894 5.4248 6.8031
Bf 0.5160 0.5160 0.5160

  Table 3 below shows values corresponding to the conditional expressions in the first embodiment. In Table 3, ν1 is the Abbe number of the first lens component G1, ν2 is the Abbe number of the second lens component G2, and γF1 is the front lens group when focusing from infinity to a photographing magnification of -0.01 times. The amount of movement of GF, γR1 is the amount of movement of the rear lens group GR when focusing from infinity to a photographing magnification of −0.01 times, n1 is the refractive index of the first lens component G1 with respect to the d-line, and n2 is The refractive index of the second lens component G2 with respect to the d-line, γF2 is the amount of movement of the front lens group GF when focusing from infinity to the photographing magnification −0.07 times, and γR2 is the photographing magnification −0.07 times from infinity. N8 is the refractive index of the positive lens G8 with respect to the d-line, n9 is the refractive index of the negative lens G9 with respect to the d-line, and ν8 is the Abbe number of the positive lens G8. Ν9 is the Abbe number of the negative lens G9, r 8 represents the radius of curvature of the image side surface (eighth surface) of the front negative lens component G4, f represents the focal length of the entire photographing lens SL system, and fR represents the focal length of the rear lens group GR. The description of the above symbols is the same in the following embodiments.

(Table 3)
ν1 = 67.87
ν2 = 67.87
γF1 = -0.4614
γR1 = -0.2354
n1 = 1.59319
n2 = 1.59319
γF2 = -3.6542
γR2 = -1.6137
n8 = 1.88300
n9 = 1.76182
ν8 = 40.77
ν9 = 26.56
r8 = 10.5445
f = 32.0013
fR = 40.1057
(1) (ν1 + ν2) /2=67.87
(2) γR1 / γF1 = 0.5102
(3) (n1 + n2) /2=1.59319
(4) γR2 / γF2 = 0.4416
(5) n8> n9: 1.88300> 1.76182
(6) ν8> ν9: 40.77> 26.56
(7) r8 / f = 0.3295
(8) fR / f = 1.533

  The aberration diagrams of the first example are shown in FIG. FIG. 2A is a diagram of various aberrations in the infinitely focused state, and FIG. 2B is a diagram of various aberrations in the intermediate photographing distance in-focus state when the photographing magnification is in focus of -0.01 times. FIG. 2C is a diagram showing various aberrations in a short distance in-focus state when focusing is performed at a photographing magnification of −0.07. In each aberration diagram, FNO is the F number, NA is the numerical aperture, A is the half field angle, H0 is the object height, d is the d-line (λ = 587.6 nm), and g is the g-line (λ = 435.6 nm), C represents the C line (λ = 656.3 nm), and F represents the F line (λ = 486.1 nm). In the aberration diagrams showing astigmatism, the solid line shows the sagittal image plane, and the broken line shows the meridional image plane. The description of this aberration diagram is the same in the following examples. As is apparent from the respective aberration diagrams, in the first example, it is understood that various aberrations are favorably corrected in each in-focus state, and excellent imaging performance is obtained.

[Second Embodiment]
FIG. 3 is a diagram showing the configuration of the taking lens SL2 according to the second embodiment of the present invention. The configuration of the photographic lens SL2 in FIG. 3 is the same as the configuration of the photographic lens SL1 according to the first example. Table 4 below shows values of specifications of the second embodiment.

(Table 4)
f = 32.00
F.NO = 1.23
2ω = 29.87
Image height = 8.50
Total length = 56.42

Surface number Curvature radius Surface spacing Refractive index Abbe number
1 35.2403 5.50 1.59319 67.87
2 320.9635 0.30
3 23.0116 4.30 1.59319 67.87
4 61.7430 0.10
5 21.5169 5.20 1.81600 46.62
6 22.0129 1.30
7 55.3189 1.30 1.67270 32.10
8 10.6045 4.90
9 0.0000 4.00 (Aperture stop S)
10 -11.2748 1.30 1.69895 30.13
11 55.2195 4.50 1.88300 40.76
12 -18.8925 0.10
13 301.4844 2.85 1.75500 52.32
14 -34.5531 (d14)
15 41.3343 4.30 1.88300 40.76
16 -31.0688 1.40 1.76182 26.52
17 458.1219 (d17)
18 0.0000 1.00 1.51680 64.10
19 0.0000 1.50
20 0.0000 1.87 1.51680 64.10
21 0.0000 0.40
22 0.0000 0.70 1.51680 64.10
23 0.0000 (Bf)

  In the second embodiment, the axial air distance d14 between the front lens group GF and the rear lens group GR and the axial air distance d17 between the rear lens group GR and the filter group FL change during focusing. Table 5 below shows each group interval in the infinite focus state, the intermediate shooting distance focus state, and the short distance focus state.

(Table 5)
Infinity Intermediate shooting distance Short distance
d14 1.2000 1.4382 3.3177
d17 7.9043 8.1353 9.4426
Bf 0.5000 0.5000 0.5000

  Table 6 below shows values corresponding to the conditional expressions in the second embodiment.

(Table 6)
ν1 = 67.87
ν2 = 67.87
γF1 = -0.4692
γR1 = -0.2310
n1 = 1.59319
n2 = 1.59319
γF2 = -3.6560
γR2 = -1.5383
n8 = 1.88300
n9 = 1.76182
ν8 = 40.76
ν9 = 26.52
r8 = 10.6045
f = 32.0001
fR = 42.5105
(1) (ν1 + ν2) /2=67.87
(2) γR1 / γF1 = 0.4923
(3) (n1 + n2) /2=1.59319
(4) γR2 / γF2 = 0.4208
(5) n8> n9: 1.88300> 1.76182
(6) ν8> ν9: 40.76> 26.52
(7) r8 / f = 0.314
(8) fR / f = 1.3284

  FIG. 4 shows various aberrations of the second example. FIG. 4A is a diagram of various aberrations in the infinitely focused state, and FIG. 4B is a diagram of various aberrations in the intermediate photographing distance in-focus state when the photographing magnification is in focus of -0.01 times. FIG. 4C is a diagram illustrating various aberrations in a short-distance in-focus state when focusing is performed at an imaging magnification of −0.07. As is apparent from this aberration diagram, it can be seen that in the second example, various aberrations are satisfactorily corrected and excellent imaging performance is obtained in each in-focus state.

[Third embodiment]
FIG. 5 is a diagram showing a configuration of the taking lens SL3 according to the third embodiment of the present invention. The configuration of the photographic lens SL3 in FIG. 5 is the same as the configuration of the photographic lens SL1 according to the first example. Table 7 below shows values of specifications of the third embodiment.

(Table 7)
f = 32.00
F.NO = 1.23
2ω = 29.87
Image height = 8.50
Total length = 54.44

Surface number Curvature radius Surface spacing Refractive index Abbe number
1 28.9228 4.35 1.59240 68.36
2 268.2548 0.10
3 24.4064 3.53 1.59240 68.36
4 60.0552 0.10
5 19.8422 3.97 1.81600 46.62
6 20.9876 1.77
7 68.6280 1.30 1.67270 32.10
8 10.9636 4.16
9 0.0000 4.76 (Aperture stop S)
10 -11.7583 1.30 1.67270 32.10
11 70.5542 4.53 1.88300 40.76
12 -19.8231 0.10
13 861.2368 2.91 1.75500 52.32
14 -33.5214 (d14)
15 40.3110 4.53 1.88300 40.76
16 -29.5297 1.67 1.76182 26.52
17 129.4578 (d17)
18 0.0000 1.00 1.51680 64.10
19 0.0000 1.50
20 0.0000 1.87 1.51680 64.10
21 0.0000 0.40
22 0.0000 0.70 1.51680 64.10
23 0.0000 (Bf)

  In the third embodiment, the axial air distance d14 between the front lens group GF and the rear lens group GR and the axial air distance d17 between the rear lens group GR and the filter group FL change during focusing. Table 8 below shows each group interval in the infinitely focused state, the intermediate shooting distance focused state, and the short distance focused state.

(Table 8)
Infinity Intermediate shooting distance Short distance
d14 1.2000 1.3739 3.4519
d17 8.1721 8.4228 9.5938
Bf 0.5000 0.5000 0.5000

  Table 9 below shows values corresponding to the conditional expressions in the third embodiment.

(Table 9)
ν1 = 68.36
ν2 = 68.36
γF1 = -0.4247
γR1 = -0.2507
n1 = 1.59240
n2 = 1.59240
γF2 = -3.6735
γR2 = -1.4217
n8 = 1.88300
n9 = 1.76182
ν8 = 40.76
ν9 = 26.52
r8 = 10.9636
f = 32.0003
fR = 49.1132
(1) (ν1 + ν2) /2=68.36
(2) γR1 / γF1 = 0.5903
(3) (n1 + n2) /2=1.59240
(4) γR2 / γF2 = 0.3870
(5) n8> n9: 1.88300> 1.76182
(6) ν8> ν9: 40.76> 26.52
(7) r8 / f = 0.3426
(8) fR / f = 1.5348

  The aberration diagrams of the third example are shown in FIG. FIG. 6A is a diagram of various aberrations in the infinitely focused state, and FIG. 6B is a diagram of various aberrations in the intermediate photographing distance in-focus state when the photographing magnification is -0.01 times. FIG. 6C is a diagram illustrating various aberrations in a short-distance in-focus state when focusing is performed at an imaging magnification of −0.07. As is apparent from this aberration diagram, it can be seen that in the third example, various aberrations are satisfactorily corrected and excellent imaging performance is obtained in each in-focus state.

[Fourth embodiment]
FIG. 7 is a diagram showing the configuration of the taking lens SL4 according to the fourth embodiment of the present invention. The configuration of the photographic lens SL4 in FIG. 7 is the same as the configuration of the photographic lens SL1 according to the first example except that the seventh lens component G7 is composed of a positive meniscus lens L7 having a convex surface facing the image side. is there. Table 10 below lists values of specifications of the fourth embodiment.

(Table 10)
f = 32.00
F.NO = 1.23
2ω = 29.87
Image height = 8.50
Total length = 56.04

Surface number Curvature radius Surface spacing Refractive index Abbe number
1 28.9228 4.24 1.59319 67.87
2 198.4893 0.10
3 25.2661 3.45 1.59319 67.87
4 61.0768 0.10
5 21.7621 5.60 1.81600 46.62
6 22.6394 1.41
7 59.8650 1.30 1.67270 32.10
8 10.4447 4.02
9 0.0000 5.42 (Aperture stop S)
10 -10.7127 1.30 1.67270 32.10
11 100.4090 3.97 1.81600 46.62
12 -19.6771 0.10
13 -237.5005 3.65 1.75500 52.32
14 -23.2086 (d14)
15 35.4041 4.81 1.88300 40.76
16 -38.2481 1.50 1.80518 25.42
17 568.3560 (d17)
18 0.0000 1.00 1.51680 64.10
19 0.0000 1.50
20 0.0000 1.87 1.51680 64.10
21 0.0000 0.40
22 0.0000 0.70 1.51680 64.10
23 0.0000 (Bf)

  In the fourth embodiment, the axial air distance d14 between the front lens group GF and the rear lens group GR and the axial air distance d17 between the rear lens group GR and the filter group FL change during focusing. Table 11 below shows each group interval in the infinitely focused state, the intermediate shooting distance focused state, and the short distance focused state.

(Table 11)
Infinity Intermediate shooting distance Short distance
d14 1.2000 1.3283 3.5662
d17 7.9000 8.1808 9.4651
Bf 0.5000 0.5000 0.5000

  Table 12 below shows values corresponding to the conditional expressions in the fourth embodiment.

(Table 12)
ν1 = 67.87
ν2 = 67.87
γF1 = -0.4091
γR1 = -0.2808
n1 = 1.59319
n2 = 1.59319
γF2 = -3.9313
γR2 = -1.5651
n8 = 1.88300
n9 = 1.80518
ν8 = 40.76
ν9 = 25.42
r8 = 10.4447
f = 32.0001
fR = 39.1379
(1) (ν1 + ν2) /2=67.87
(2) γR1 / γF1 = 0.6864
(3) (n1 + n2) /2=1.59319
(4) γR2 / γF2 = 0.3981
(5) n8> n9: 1.88300> 1.80518
(6) ν8> ν9: 40.76> 25.42
(7) r8 / f = 0.264
(8) fR / f = 1.2231

  The aberration diagrams of the fourth example are shown in FIG. FIG. 8A is a diagram of various aberrations in the infinitely focused state, and FIG. 8B is a diagram of various aberrations in the intermediate shooting distance in-focus state when focusing at a shooting magnification of -0.01 times. FIG. 8C is a diagram illustrating various aberrations in a short-distance in-focus state when focusing is performed at a photographing magnification of −0.07. As is apparent from this aberration diagram, in the fourth example, it is understood that various aberrations are satisfactorily corrected and excellent imaging performance is obtained in each in-focus state.

It is sectional drawing which shows the structure of the imaging lens by 1st Example. FIG. 3A is an aberration diagram of the first example, FIG. 3A is a diagram illustrating various aberrations in an infinite focus state, FIG. 3B is a graph illustrating various aberrations in an intermediate shooting distance focus state, and FIG. It is an aberration diagram in the focal state. It is sectional drawing which shows the structure of the imaging lens by 2nd Example. FIG. 7A is an aberration diagram of the second example, and FIG. 9A is a diagram illustrating various aberrations in the infinite focus state, FIG. 9B is a diagram illustrating various aberrations in the intermediate shooting distance focus state, and FIG. It is an aberration diagram in the focal state. It is sectional drawing which shows the structure of the photographic lens by 3rd Example. FIG. 4A is an aberration diagram of Example 3. FIG. 3A is a diagram illustrating aberrations at an infinite focus state, FIG. 5B is a diagram illustrating aberrations at an intermediate shooting distance focus state, and FIG. It is an aberration diagram in the focal state. It is sectional drawing which shows the structure of the photographic lens by 4th Example. FIG. 10A is an aberration diagram of Example 4, where FIG. 10A is a diagram illustrating aberrations at an infinite focus state, FIG. 10B is a diagram illustrating aberrations at an intermediate shooting distance focus state, and FIG. It is an aberration diagram in the focal state. The electronic still camera which mounts the photographic lens concerning this invention is shown, (a) is a front view, (b) is a rear view. It is sectional drawing along the AA 'line of Fig.9 (a).

Explanation of symbols

SL (SL1 to SL4) Shooting lens GF Front lens group GR Rear lens group G1 First lens component G2 Second lens component G3 Third lens component G4 Front negative lens component (fourth lens component)
G5 Rear negative lens component (5th lens component)
G6 Rear positive lens component (sixth lens component) G56 Joint lens G7 Seventh lens component G8 Positive lens G9 Negative lens G89 Joint lens S Aperture stop 1 Electronic still camera (optical equipment)

Claims (21)

In order from the object side, the lens unit consists essentially of two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power,
The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power on the object side from the aperture stop,
The rear lens group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side,
When focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes,
The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the front lens group is focused from infinity to a photographing magnification of −0.01 times. The amount of movement is γF1, the amount of movement of the rear lens group when focusing from infinity to a photographing magnification of -0.01 times is γR1, and the front side when focusing from infinity to a photographing magnification of -0.07 times. When the movement amount of the lens unit is γF2, and the movement amount of the rear lens unit when focusing from infinity to a photographing magnification of −0.07 is γR2 , the following equation (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
0.35 <γR2 / γF2 ≦ 0.4416
Shooting lens that satisfies the above conditions. In order from the object side, the lens unit consists essentially of two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power,
The front lens group includes, in order from the most object side, a first lens component having a positive refractive power and a second lens component having a positive refractive power,
The rear lens group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side,
When focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes,
The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the front lens group is focused from infinity to a photographing magnification of −0.01 times. The amount of movement is γF1, the amount of movement of the rear lens group when focusing from infinity to a photographing magnification of -0.01 times is γR1, and the front side when focusing from infinity to a photographing magnification of -0.07 times. When the movement amount of the lens unit is γF2, and the movement amount of the rear lens unit when focusing from infinity to a photographing magnification of −0.07 is γR2 , the following equation (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
0.35 <γR2 / γF2 ≦ 0.4416
Shooting lens that satisfies the above conditions. In order from the object side, the lens unit consists essentially of two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power,
The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power on the object side from the aperture stop,
The rear lens group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side,
When focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes,
The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the front lens group is focused from infinity to a photographing magnification of −0.01 times. The amount of movement is γF1, the amount of movement of the rear lens group when focusing from infinity to a photographing magnification of −0.01 times is γR1, and the d-line of the negative lens arranged closest to the image side of the cemented lens Where n9 is the refractive index and n9 is the Abbe number, and n8 is the refractive index of the positive lens bonded to the object side of the negative lens and the Abbe number is ν8 , the following equation (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
n8> n9
ν8> ν9
Shooting lens that satisfies the above conditions. In order from the object side, the lens unit consists essentially of two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power,
The front lens group includes, in order from the most object side, a first lens component having a positive refractive power and a second lens component having a positive refractive power,
The rear lens group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side,
When focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes,
The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the front lens group is focused from infinity to a photographing magnification of −0.01 times. The amount of movement is γF1, the amount of movement of the rear lens group when focusing from infinity to a photographing magnification of −0.01 times is γR1, and the d-line of the negative lens arranged closest to the image side of the cemented lens Where n9 is the refractive index and n9 is the Abbe number, and n8 is the refractive index of the positive lens bonded to the object side of the negative lens and the Abbe number is ν8 , the following equation (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
n8> n9
ν8> ν9
Shooting lens that satisfies the above conditions. In order from the object side, the lens unit consists essentially of two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power,
The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power on the object side from the aperture stop,
The rear lens group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side,
Between the second lens component and the cemented lens, in order from the object side, a front negative lens component having a negative refractive power, an aperture stop, a rear negative lens component having a negative refractive power, and a positive A rear positive lens component having refractive power,
A meniscus third lens component with a convex surface facing the object side between the second lens component and the front negative lens component;
When focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes,
The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the front lens group is focused from infinity to a photographing magnification of −0.01 times. When the amount of movement is γF1, and the amount of movement of the rear lens group when focusing from infinity to a photographing magnification of −0.01 times is γR1, the following equation (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
Shooting lens that satisfies the above conditions. In order from the object side, the lens unit consists essentially of two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power,
The front lens group includes, in order from the most object side, a first lens component having a positive refractive power and a second lens component having a positive refractive power,
The rear lens group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side,
Between the second lens component and the cemented lens, in order from the object side, a front negative lens component having a negative refractive power, an aperture stop, a rear negative lens component having a negative refractive power, and a positive A rear positive lens component having refractive power,
A meniscus third lens component with a convex surface facing the object side between the second lens component and the front negative lens component;
When focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes,
The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the front lens group is focused from infinity to a photographing magnification of −0.01 times. When the amount of movement is γF1, and the amount of movement of the rear lens group when focusing from infinity to a photographing magnification of −0.01 times is γR1, the following equation (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
Shooting lens that satisfies the above conditions. The refractive index for the d-line of the negative lens arranged closest to the image side of the cemented lens is n9, the Abbe number is ν9, and the refractive index for the d-line of the positive lens bonded to the object side of the negative lens is n8. When the Abbe number is ν8, the following formula n8> n9
ν8> ν9
Photographing lens according to claim 1 or 2 to satisfy the condition. When focusing from infinity to a photographing magnification of -0.07, when the movement amount of the front lens group is γF2 and the movement amount of the rear lens group is γR2, the following expression 0.35 <γR2 / γF2 <0.50
The photographic lens according to claim 3 or 4 , which satisfies the following condition. Between the second lens component and the cemented lens,
A front negative lens component having negative refractive power, an aperture stop, a rear negative lens component having negative refractive power, and a rear positive lens component having positive refractive power in order from the object side. The photographing lens according to any one of 1 to 4, 7, and 8. When focusing from infinity to a photographing magnification of -0.07, when the movement amount of the front lens group is γF2 and the movement amount of the rear lens group is γR2, the following expression 0.35 <γR2 / γF2 <0.50
The photographic lens according to claim 5 or 6 , which satisfies the following condition. Between the second lens component and the front negative lens component,
The taking lens according to any one of claims 1 to 4 and 7 to 9, which has a meniscus third lens component having a convex surface facing the object side. The front negative lens component is a meniscus fourth lens component having a convex surface facing the object side,
The photographing lens according to any one of claims 5, 6, and 9 to 11 , wherein the rear negative lens component is a biconcave fifth lens component. Between the sixth lens component as the rear positive lens component and the cemented lens,
The taking lens according to any one of claims 5, 6, and 9 to 12, comprising a seventh lens component having a positive refractive power. The photographing lens according to any one of claims 5, 6, and 9 to 13, wherein the rear negative lens component and the rear positive lens component are a cemented cemented lens. When the radius of curvature of the image-side surface of the front negative lens component is r8 and the focal length of the entire photographing lens system is f, the following expression 0.30 <r8 / f <0.50
The photographic lens according to claim 5, wherein the photographic lens satisfies the following condition. When the refractive index of the first lens component with respect to the d-line is n1, and the refractive index of the second lens component with respect to the d-line is n2, the following formula (n1 + n2) / 2> 1.49.
The photographic lens according to any one of claims 1 to 15, which satisfies the following condition. The front lens group and the rear lens group, upon focusing from the intermediate photographing distance close object, according to one of claims 1 to 16 which moves along the optical axis at a different increment ratio Photography lens. It said first lens component and said second lens component, respectively, the imaging lens according to any one of claims 1 to 17 is a meniscus shape with a convex surface facing the object side. When the focal length of the rear lens group is fR and the focal length of the entire photographing lens system is f, the following expression 1.00 <fR / f <2.00
Photographing lens according to any one of claims 1 to 18 that satisfies the condition. An optical apparatus comprising the photographing lens according to any one of claims 1 to 19, wherein an image of an object is formed at a predetermined position. In order from the object side, the lens unit consists essentially of two lens groups, a front lens group having a positive refractive power and a rear lens group having a positive refractive power,
The front lens group has a first lens component having a positive refractive power and a second lens component having a positive refractive power on the object side from the aperture stop ,
The rear lens group has a cemented lens in which a positive lens and a negative lens are bonded in order from the object side,
When focusing on an object at a short distance from infinity, the distance between the front lens group and the rear lens group changes,
The Abbe number of the first lens component with respect to the d-line is ν1, the Abbe number of the second lens component with respect to the d-line is ν2, and the front lens group is focused from infinity to a photographing magnification of −0.01 times. The amount of movement is γF1, the amount of movement of the rear lens group when focusing from infinity to a photographing magnification of -0.01 times is γR1, and the front side when focusing from infinity to a photographing magnification of -0.07 times. When the movement amount of the lens unit is γF2, and the movement amount of the rear lens unit when focusing from infinity to a photographing magnification of −0.07 is γR2 , the following equation (ν1 + ν2) / 2> 60
0.35 <γR1 / γF1 <0.80
0.35 <γR2 / γF2 ≦ 0.4416
An imaging method using a photographic lens that satisfies the above conditions.

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