JP2013122559A

JP2013122559A - Photographic lens

Info

Publication number: JP2013122559A
Application number: JP2011271639A
Authority: JP
Inventors: Noriyuki Adachi; 宣幸安達
Original assignee: Tamron Co Ltd
Current assignee: Tamron Co Ltd
Priority date: 2011-12-12
Filing date: 2011-12-12
Publication date: 2013-06-20

Abstract

PROBLEM TO BE SOLVED: To provide a photographic lens capable of rapid automatic focusing, and suitable for a camera shake correction mechanism.SOLUTION: A photographic lens includes: in order from an object side to an image side, a first lens group 11 with positive refractive power; a second lens group 12 with negative refractive power; a third lens group 13 with positive refractive power; a fourth lens group 15 with positive refractive power; a fifth lens group 15 with negative refractive power, which moves in a direction nearly vertical to an optical axis when camera shake correction is performed; and a sixth lens group 16 with positive refractive power. In focusing from an infinite object distance to a close distance, while the first lens group, the fifth lens group, and the sixth lens group, are fixed, the second lens group moves on the optical axis from the object side to an image surface side, the third lens group moves on the optical axis forward and backward, and the fourth lens group moves on the optical axis from the image surface side to the object side. The a first lens group has at least three or more convex lenses and at least one or more concave lens, the a third lens group has one convex lens, and the a fourth lens group has a set of cemented lenses.

Description

本発明は、撮影レンズ、さらに詳しくは、撮影倍率が等倍程度のマクロ撮影が可能であって、手振れ補正機構を好適に組み込んで写真カメラ、ビデオカメラ、電子スチルカメラに使用できる撮像レンズに関する。 The present invention relates to a photographing lens, and more particularly, to an imaging lens that can perform macro photography with a photographing magnification of about 1 × and can be used in a photographic camera, a video camera, and an electronic still camera by suitably incorporating a camera shake correction mechanism.

一般的に、マクロ撮影用レンズは、撮影倍率が高くなるに従い、収差の変動が大きくなるため、それを補正することが非常に難しい。その対策として、フォーカシング時に複数のレンズ群を移動させた、いわゆるフローティング方式のレンズが提案されている。 In general, the macro imaging lens has a large variation in aberration as the imaging magnification increases, and it is very difficult to correct it. As a countermeasure, a so-called floating lens in which a plurality of lens groups are moved during focusing has been proposed.

従来のマクロ撮影に好適な撮影レンズの一つは、
物体側より像側へ順に、フォーカスに際して不動の前群、フォーカスに際して移動するレンズ群を少なくとも２つ含む中間レンズ群、光軸と垂直方向の成分を持つように移動して光軸と垂直方向に結像位置を変移させる負の屈折力の防振レンズ群、正の屈折力の後群、とから成る撮影レンズであって、該後群は正レンズと負レンズを含む複数のレンズを有し、該後群中の正レンズの材料の屈折率の平均値をＮｂｐａ、該後群中の負レンズの材料の屈折率の平均値をＮｂｎａ、該前群から該防振レンズ群までの総合の焦点距離をｆａ、全系の焦点距離をｆとするとき
１．７＜Ｎｂｎａ
Ｎｂｐａ＜１．７
１．８５＜｜ｆａ／ｆ｜＜２．８０
なる条件を満足することを特徴とする撮影レンズである（例えば、特許文献１参照）。 One of the photographic lenses suitable for conventional macro photography is
In order from the object side to the image side, a front group that does not move during focusing, an intermediate lens group that includes at least two lens groups that move during focusing, and moves so as to have a component in a direction perpendicular to the optical axis. An imaging lens comprising an anti-vibration lens group having a negative refractive power that shifts an imaging position and a rear group having a positive refractive power, and the rear group has a plurality of lenses including a positive lens and a negative lens , The average refractive index of the positive lens material in the rear group is Nbpa, the average refractive index of the negative lens material in the rear group is Nbna, and the total from the front group to the anti-vibration lens group When the focal length is fa and the focal length of the entire system is f
1.7 <Nbna
Nbpa <1.7
1.85 <| fa / f | <2.80
The photographic lens is characterized by satisfying the following conditions (for example, see Patent Document 1).

従来技術の他のマクロ撮影に好適な撮影レンズの他の一つは、
無限遠物体から近距離物体へのフォーカシングに際して、光軸方向を移動する第１のフォーカスレンズ群と、前記第１のフォーカスレンズ群の移動量とは異なる移動量でフォーカシングに際して移動する第２のフォーカスレンズ群と、前記第１のフォーカスレンズ群および前記第２フォーカスレンズ群のいずれの移動量とも異なる移動量でフォーカシングに際して移動する第３のフォーカスレンズ群を有し、前記フォーカスレンズ群のうち少なくとも一つのフォーカスレンズ群は単玉構成としたことを特徴とする近距離撮影可能な光学系のフォーカスレンズ群は単玉構成としたことを特徴とする近距離撮影可能な光学系である（例えば、特許文献２参照）。 One other photographic lens suitable for other macro photography in the prior art is:
When focusing from an object at infinity to a near object, a first focus lens group that moves in the optical axis direction and a second focus that moves during focusing with a movement amount different from the movement amount of the first focus lens group A lens group, and a third focus lens group that moves during focusing with a movement amount different from any of the movement amounts of the first focus lens group and the second focus lens group, and at least one of the focus lens groups One focus lens group is a single lens configuration, and the focus lens group of a short distance shooting optical system is a single lens configuration. Reference 2).

従来技術の他のマクロ撮影に好適な撮影レンズの他の一つは、
物体側から順に、正の屈折力を有する第１レンズ群と、負の屈折力を有する第２レンズ群と、正の屈折力を有する第３レンズ群と、正の屈折力を有する第４レンズ群と、負の屈折力を有する第５レンズ群とで構成され、無限遠物体から近距離物体へのフォーカシングに際して、前記第１レンズ群は固定であり、前記第２レンズ群は像側へ移動し、前記第３レンズ群は物体側へ移動し、前記第４レンズ群は前記第３レンズ群と異なる軌跡で物体側へ移動し、前記第５レンズ群は固定であり、
以下の条件式を満足することを特徴とする撮影レンズ
０．８９≦ｆ４／ｆ３＜２．０
ｆ３：前記第３レンズ群の焦点距離
ｆ４：前記第４レンズ群の焦点距離
である（例えば、特許文献３参照）。 One other photographic lens suitable for other macro photography in the prior art is:
In order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens having a positive refractive power And a fifth lens group having a negative refractive power, the first lens group is fixed and the second lens group moves to the image side during focusing from an object at infinity to an object at a short distance The third lens group moves toward the object side, the fourth lens group moves toward the object side along a different locus from the third lens group, and the fifth lens group is fixed,
A photographic lens characterized by satisfying the following conditional expression:
0.89 ≦ f4 / f3 <2.0
f3: focal length of the third lens group f4: focal length of the fourth lens group (for example, see Patent Document 3).

特開２００９−２８８３８４号公報JP 2009-288384 A 特開２０１１−４８２３２号公報JP 2011-48232 A 特許４５９０９００号公報Japanese Patent No. 4590900

特許文献１に開示されている撮影レンズは、前群固定のフローティング方式であって、手振れ補正機構を組み込んでいる。軸上色収差に関して、物体距離無限遠状態で、ｃ線からｇ線の波長域でその色収差の最大幅が大きい。最短撮影距離状態では、ゾーナル(入射光高さ）０．７から１．０にかけての軸上色収差が大きいまま存続している。また、撮影倍率０．５倍付近から最短撮影距離状態にかけてのコマ収差の変動が大きいため、フォーカス全域において高い結像性能が得られない。その上、画角０°及び最大画角の光線である上下光線側の単色コマフレアが大きいため、撮影状況によっては、パープルフリンジ（紫フレアー）等の問題を発生させるおそれがある。 The photographic lens disclosed in Patent Document 1 is a floating system fixed at the front group, and incorporates a camera shake correction mechanism. Regarding the axial chromatic aberration, the maximum width of the chromatic aberration is large in the wavelength range from the c-line to the g-line in an infinite object distance state. In the shortest shooting distance state, axial chromatic aberration from zonal (incident light height) 0.7 to 1.0 remains large. In addition, since the coma aberration varies greatly from the photographing magnification of about 0.5 times to the shortest photographing distance state, high imaging performance cannot be obtained over the entire focus range. In addition, the monochromatic coma flare on the upper and lower light rays, which is the light with the angle of view of 0 ° and the maximum angle of view, is large.

特許文献２に開示されている光学系は、前群固定のフローティング方式であって、手振れ補正機構を組み込んでいるが、物体距離無限遠状態から最短撮影距離状態にかけての軸上色収差補正が不十分で、収差が残存している。最短撮影距離状態では、特にゾーナル（入射光高さ）０．７から１．０にかけての軸上色収差が大きい。最短撮影距離状態での歪曲収差も大きい。開口絞り直後に移動レンズ群を配置した構成のため、フォーカス移動群の重量が重くなりやすく、低エネルギー消費・高速作動のフォーカス機構の実現に沿わない。
特許文献２に開示されている光学系はまた、防振レンズ群が開口絞り付近に配置されており、手振れ補正機構が大型化し、コンパクトな鏡筒とすることが困難である。 The optical system disclosed in Patent Document 2 is a floating system that is fixed to the front group and incorporates a camera shake correction mechanism, but the axial chromatic aberration correction from the object distance infinite state to the shortest shooting distance state is insufficient Thus, aberration remains. In the shortest shooting distance state, axial chromatic aberration is particularly large in the zonal (incident light height) range of 0.7 to 1.0. Distortion at the shortest shooting distance is also large. Since the moving lens group is arranged immediately after the aperture stop, the weight of the focus moving group tends to increase, and it does not follow the realization of a low energy consumption and high speed operating focus mechanism.
The optical system disclosed in Patent Document 2 also has an anti-vibration lens group disposed in the vicinity of the aperture stop, which increases the size of the camera shake correction mechanism and makes it difficult to form a compact lens barrel.

特許文献３に開示されている撮影レンズにおいては、前群固定のフローティング方式であるが、手振れ補正機構を組み込んでおらず、また、物体距離無限遠状態から最短撮影距離状態にかけての歪曲収差変動、像面湾曲の変動が大きい。最短撮影距離状態のゾーナル（入射光高さ）０．７から１．０にかけての軸上色収差を小さくするため、第１レンズ群内に多くのレンズを使って収差補正を行っており、レンズ構成が複雑化している。その結果、第１レンズ群の径が大きくなり、鏡筒径の大型化を招いている。物体距離無限遠状態での軸上色収差が大きい問題もある。最短撮影距離状態で、特に７割像高付近において、倍率色収差が大きい問題がある。 The photographic lens disclosed in Patent Document 3 is a floating system that is fixed to the front group, but does not incorporate a camera shake correction mechanism, and also has distortion aberration variation from the object distance infinity state to the shortest photographic distance state. Large variation in field curvature. In order to reduce axial chromatic aberration in the shortest shooting distance state zonal (incident light height) from 0.7 to 1.0, aberration correction is performed using many lenses in the first lens group, and the lens configuration Is getting complicated. As a result, the diameter of the first lens group is increased, and the lens barrel diameter is increased. There is also a problem that axial chromatic aberration is large at an object distance of infinity. There is a problem that chromatic aberration of magnification is large in the shortest shooting distance state, particularly in the vicinity of 70% image height.

（発明の目的）
本発明は、従来のマクロ撮影が可能な撮影レンズの上述した問題点に鑑みてなされたものであって、物体距離無限遠から等倍付近の最短撮影距離状態へのフォーカシング全域に渡って高い結像性能を有し、すなわち物体距離無限遠から等倍付近の最短撮影距離状態へのフォーカシング全域に渡って、軸上色収差、倍率色収差、像面湾曲、歪曲収差を小さくし、高い結像性能を有する撮像レンズを提供することを目的とする。 (Object of invention)
The present invention has been made in view of the above-described problems of conventional photographic lenses capable of macro photography, and has high imaging over the entire focusing range from the object distance infinity to the shortest photographing distance state near the same magnification. Imaging with high imaging performance, with reduced axial chromatic aberration, lateral chromatic aberration, curvature of field, and distortion aberration over the entire focusing range from the infinite object distance to the shortest focusing distance near the same magnification. The object is to provide a lens.

本発明はまた、フォーカシングを軽量なレンズ群を移動させることによって行うように構成し、オートフォーカスを迅速に行える撮像レンズを提供することを目的とする。 It is another object of the present invention to provide an imaging lens that is configured to perform focusing by moving a lightweight lens group and that can perform autofocus quickly.

本発明はさらに、手振れ補正機能が高くかつ軽量なレンズを光軸と直交する方向へ移動させることができる、手振れ補正機構に好適な撮像レンズを提供することを目的とする。 Another object of the present invention is to provide an imaging lens suitable for a camera shake correction mechanism that can move a lightweight lens having a high camera shake correction function in a direction orthogonal to the optical axis.

本発明は、
物体側から像側へ順に、正の屈折力の第１レンズ群、負の屈折力の第２レンズ群、正の屈折力の第３レンズ群、正の屈折力の第４レンズ群、手振れ補正時、光軸に対して略垂直方向に移動する負の屈折力の第５レンズ群と、正の屈折力の第６レンズ群とから構成され、フォーカシングにおいて、第１レンズ群、第５レンズ群、第６レンズ群は固定され、第２レンズ群は物体距離無限遠から至近距離にかけて光軸上を物体側から像面側へ移動し、第３レンズ群は光軸上を前後に移動し、第４レンズ群は物体距離無限遠から至近距離にかけて光軸上を像面側から物体側へ移動し、前記第１レンズ群は、少なくとも３枚以上の凸レンズと少なくとも１枚以上の凹レンズからなり、前記第３レンズ群は１枚の凸レンズからなり、前記第４レンズ群は１組の接合レンズからなり、以下の条件式を満足した光学系。
(Rn1-Rn2)/(Rn1+Rn2) ＜ 0 ・・・・・・・・（１）
nd1＜1.6 vd1＜67.5 ・・・・・・・（２）
Rn1：第１レンズ群中、最も物体側に配置された凹レンズの物体側の曲率半径
Rn2：第１レンズ群中、最も物体側に配置された凹レンズの像側の曲率半径
nd1：第１レンズ群内に配置された凸レンズのｄ線に対する平均屈折率
vd1：第１レンズ群内に配置された凸レンズの平均アッベ数
である。 The present invention
In order from the object side to the image side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and camera shake correction And a fifth lens group having a negative refractive power that moves in a direction substantially perpendicular to the optical axis, and a sixth lens group having a positive refractive power. The sixth lens group is fixed, the second lens group moves from the object side to the image plane side from the object distance infinity to the closest distance, the third lens group moves back and forth on the optical axis, The four lens groups move on the optical axis from the image plane side to the object side from an infinite object distance to a close distance, and the first lens group includes at least three convex lenses and at least one concave lens, The three lens groups consist of one convex lens, and the fourth lens group is 1 It consists of a cemented lens, an optical system satisfying the following condition.
(Rn1-Rn2) / (Rn1 + Rn2) <0 (1)
nd1 <1.6 vd1 <67.5 (2)
Rn1: The radius of curvature of the object side of the concave lens located closest to the object side in the first lens group
Rn2: radius of curvature of the concave lens located closest to the object side in the first lens group
nd1: Average refractive index with respect to d-line of a convex lens arranged in the first lens group
vd1: The average Abbe number of the convex lens disposed in the first lens group.

（発明の作用効果）
本発明の撮影レンズによれば、物体距離無限遠から等倍付近の最短撮影距離状態へのフォーカシング全域に渡って高い結像性能を有し、すなわち物体距離無限遠から等倍付近の最短撮影距離状態へのフォーカシング全域に渡って、軸上色収差、倍率色収差、像面湾曲、歪曲収差を最小化し、高い結像性能を有する撮像レンズを構成することができる。
本発明の撮影レンズによれば、フォーカシングを軽量なレンズ群を移動させることによって、オートフォーカスを迅速に行える撮像レンズを構成できる。
本発明の撮影レンズによればさらに、手振れ補正機能が高くかつ軽量なレンズを光軸と直交する方向へ移動させることができる、手振れ補正機構に好適な撮像レンズを構成することができる。 (Effects of the invention)
According to the photographic lens of the present invention, it has high imaging performance over the entire focusing range from the object distance infinity to the shortest shooting distance state near the same magnification, that is, from the object distance infinity to the shortest shooting distance state near the same magnification. Over the entire focusing area, axial chromatic aberration, lateral chromatic aberration, curvature of field, and distortion can be minimized, and an imaging lens having high imaging performance can be configured.
According to the photographic lens of the present invention, it is possible to configure an imaging lens capable of quickly performing autofocus by moving a lightweight lens group for focusing.
According to the photographic lens of the present invention, it is possible to configure an imaging lens suitable for a camera shake correction mechanism that can move a lightweight lens having a high camera shake correction function in a direction orthogonal to the optical axis.

本発明の撮影レンズにおいては、フォーカスシング時、最も物体側のレンズ群と像面側のレンズ群を固定し、内部のレンズ群３つを移動させる。この構成により、以下の利点がある。すなわち、第１レンズ群をフォーカシング時固定とすることで、第１レンズ群が移動するレンズタイプに比べて、（１）フォーカシングによる撮影レンズと被写体との距離変化がなくなり、撮影時に被写体に接触する恐れを減らせること、（２）合焦時、大型で高重量のレンズを繰り出すことにより生じる、アクチュエーターの負荷増大や鏡筒外形の大型化を回避できること、（３）フォーカシング全域にかけて高い結像性能を得られることである。 In the photographing lens of the present invention, at the time of focussing, the lens unit closest to the object side and the lens unit on the image plane side are fixed, and three internal lens groups are moved. This configuration has the following advantages. That is, by fixing the first lens group during focusing, compared to the lens type in which the first lens group moves, (1) there is no distance change between the photographing lens and the subject due to focusing, and the subject contacts the subject during photographing. Reduces fear, (2) Avoids an increase in actuator load and enlarges the outer shape of the lens barrel caused by paying out a large and heavy lens at the time of focusing, and (3) High imaging performance over the entire focusing area It is possible to obtain.

最終群を固定することは、鏡筒内部へのごみの進入を防止し易くし、機械的構造の簡素化を容易に実現できる。 Fixing the final group makes it easy to prevent dust from entering the inside of the lens barrel, and simplifies the mechanical structure.

本発明の撮影レンズにおいては、開口絞りは、第２レンズ群と第３レンズ群との間に配置し、固定とし、機械的構造の簡素化が図ることができる。本発明の撮影レンズにおいてはまた、物体距離無限遠状態から最短撮影距離状態にかけて開口絞りの径を小さくでき、撮影レンズの小型化に有利である。 In the photographic lens of the present invention, the aperture stop is disposed between the second lens group and the third lens group and is fixed, so that the mechanical structure can be simplified. In the photographing lens of the present invention, the diameter of the aperture stop can be reduced from the infinite object distance state to the shortest photographing distance state, which is advantageous for downsizing the photographing lens.

本発明の撮影レンズにおいてはまた、最大入射光線であるFno光線が開口絞りにより決定され、第１レンズ群の大型化を抑え、撮影レンズの小型化に有利である。 In the photographic lens of the present invention, the Fno light beam, which is the maximum incident light beam, is determined by the aperture stop, which suppresses the increase in the size of the first lens group and is advantageous for downsizing the photographic lens.

本発明の撮影レンズの第１レンズ群のレンズ構成は、例えば、少なくとも凸レンズと、凸レンズと凹レンズレンズの接合レンズと、凸レンズである。これは最短撮影距離状態付近におけるコマ収差を良好に補正することを可能にしている。本発明の第１レンズ群のこのレンズ構成は、さらに、偏芯による像面湾曲の変動に対して、レンズを複数枚で構成させることによってその影響度を分散させることができる。 The lens configuration of the first lens group of the photographic lens of the present invention is, for example, at least a convex lens, a cemented lens of a convex lens and a concave lens, and a convex lens. This makes it possible to satisfactorily correct coma near the shortest shooting distance state. This lens configuration of the first lens group according to the present invention can further disperse the influence of the variation in field curvature due to decentering by forming a plurality of lenses.

本発明の撮影レンズでは、第３レンズ群は１枚の凸レンズ、第４レンズ群は一組の接合レンズで構成している。物体側から正レンズ群、負レンズ群とならび、固定絞りが配置されている光学系の場合、絞りに隣接して後続するレンズ群はレンズ径が大きくなる。そのため、レンズ単体の重量が重くなりやすく、第３群を移動群とする場合、その軽量化を図るため１枚のレンズで構成させている。 In the photographic lens of the present invention, the third lens group is composed of one convex lens, and the fourth lens group is composed of a pair of cemented lenses. In the case of an optical system in which a fixed stop is arranged, as well as a positive lens group and a negative lens group from the object side, the lens group adjacent to the stop has a large lens diameter. Therefore, the weight of a single lens is likely to be heavy, and when the third group is a moving group, it is configured with a single lens in order to reduce its weight.

本発明の撮影レンズでは、さらに、第４レンズ群も同様に、少ないレンズ枚数とすることが望ましく、本発明の場合、１組の接合レンズとして構成させている。レンズ枚数的に言えば、開口絞り前後にある移動レンズ群が合焦時に光軸上を逆方向へ移動するから、開口絞り前後にある移動レンズ群のレンズ枚数が等しい構成が望ましい。開口絞りより物体側にレンズ３枚と、像面側に３枚とすることにより、合焦リンクの回転による合焦時に、開口絞りより物体側にレンズ３枚と像面側に３枚とを配置することにより、一方の３枚が重力に従って下降し、他方の３枚が重力に逆らって上昇するため、望ましい重量バランスを実現できる。 In the photographic lens of the present invention, it is also desirable that the fourth lens group has a small number of lenses, and in the case of the present invention, it is configured as a set of cemented lenses. In terms of the number of lenses, since the moving lens groups before and after the aperture stop move in the reverse direction on the optical axis when focused, it is desirable that the moving lens groups before and after the aperture stop have the same number of lenses. By using 3 lenses on the object side and 3 images on the image plane side from the aperture stop, 3 lenses on the object side and 3 images on the image plane side from the aperture stop are in focus when the focusing link rotates. By arranging, one three sheets descend according to gravity, and the other three sheets rise against gravity, so that a desirable weight balance can be realized.

本発明の撮影レンズでは、さらに、第４レンズ群は、物体側から凹凸の並びとすることが好ましい。凸凹の接合レンズを配置することに比べて、ファーカシング時の像面湾曲の変動を最小化する上で効果的である。 In the photographic lens of the present invention, it is further preferable that the fourth lens group is arranged in an uneven shape from the object side. This is more effective in minimizing fluctuations in the field curvature during focusing compared to the case where convex / concave cemented lenses are arranged.

本発明の撮影レンズでは、フローティング方式を持つ光学系の特徴として、物体距離無限遠から最短撮影距離にかけて像面湾曲は、アンダー側からオーバー側に行き、等倍付近でまたアンダーに戻る挙動を示す。凹凸の接合レンズとすると、このオーバーからアンダーへの像面湾曲の変動を小さくすることができる。 In the photographing lens of the present invention, as a feature of the optical system having the floating system, the field curvature from the infinite object distance to the shortest photographing distance shows a behavior of going from the under side to the over side and returning to the under in the vicinity of the same magnification. When the concave-convex cemented lens is used, the fluctuation of the curvature of field from over to under can be reduced.

本発明の撮影レンズでは、防振レンズ群である第５レンズ群は、フォーカシング時固定である。本発明の実施例では、カメラ本体の手振れ量を0.3度相当と仮定し、それを補正するため、第５レンズ群は、光軸上を略垂直方向に移動させるようにしている。 In the photographic lens of the present invention, the fifth lens group which is the anti-vibration lens group is fixed during focusing. In the embodiment of the present invention, it is assumed that the camera shake amount of the camera body is equivalent to 0.3 degrees, and in order to correct it, the fifth lens group is moved in the substantially vertical direction on the optical axis.

（条件式（１）の説明）
(Rn1-Rn2)/(Rnl+Rn2) ＜ 0 ・・・・・・・ (1)
Rn1：第１レンズ群中、最も物体側に配置された凹レンズの物体側の曲率半径
Rn2：第１レンズ群中、最も物体側に配置された凹レンズの像側の曲率半径
本発明の如く第１レンズ群を固定とし、それよりも内部のレンズ群を移動させたフローティング方式のマクロレンズにおいては、第１レンズ群は特にマクロ域での結像性能に重要な役割を担っている。条件式（１）は、凹レンズが像面側に凸形状であり、物体側の曲率半径が像面側の曲率半径に比べて小さい、負のメニスカスレンズの形状を限定するものである。このようにすることによって、特に最短撮影距離状態付近で、球面収差をオーバー側へ、コマ収差をアンダー側への補正を行う。 (Explanation of conditional expression (1))
(Rn1-Rn2) / (Rnl + Rn2) <0 (1)
Rn1: The radius of curvature of the object side of the concave lens located closest to the object side in the first lens group
Rn2: radius of curvature of the image side of the concave lens disposed closest to the object side in the first lens group The floating type macro lens in which the first lens group is fixed and the inner lens group is moved as in the present invention. In the first lens group, the first lens group plays an important role particularly in the imaging performance in the macro region. Conditional expression (1) limits the shape of the negative meniscus lens in which the concave lens has a convex shape on the image side and the curvature radius on the object side is smaller than the curvature radius on the image side. By doing so, the spherical aberration is corrected to the over side and the coma aberration is corrected to the under side, particularly near the shortest shooting distance state.

条件式（１）の上限を超えると、最短撮影距離状態付近での球面収差が、アンダー側になり過ぎることと、コマ収差がオーバー側に発生し、結像性能が満足できなくなるので好ましくない。
また、前記レンズ群を構成する凸レンズは、３枚以上とすることが好ましく、残存球面収差を小さくすることができる。さらに、前記第１レンズ群を複数枚で構成することにより、偏芯による像面湾曲の変動への影響度を分散させることができる。 Exceeding the upper limit of conditional expression (1) is not preferable because the spherical aberration in the vicinity of the shortest shooting distance state becomes excessively under and coma occurs on the over side, and the imaging performance cannot be satisfied.
The number of convex lenses constituting the lens group is preferably three or more, and the residual spherical aberration can be reduced. Further, by configuring the first lens group with a plurality of lenses, it is possible to disperse the degree of influence on fluctuations in field curvature due to decentering.

（条件式（２）の説明）
nd1＜1.6 vd1＞67.5 ・・・・・・・(2)
nd1：第１レンズ群内に配置された凸レンズのｄ線に対する平均屈折率
vd1：第１レンズ群内に配置された凸レンズの平均アッベ数
条件式（2）を外れると、本発明の望む結像性能を得ることができなくなる。例えば、特許文献２の第３実施例、同第４実施例、さらに特許文献１の第３実施例の最短撮影距離状態時、７割像高で瞳中心におけるｃ線〜ｇ線の最大幅は、それぞれ、0.030ｍｍ、0.049ｍｍ、0.024ｍｍと大きい。本発明の同収差は、0.021ｍｍ以下である。 (Explanation of conditional expression (2))
nd1 <1.6 vd1> 67.5 (2)
nd1: Average refractive index with respect to d-line of a convex lens arranged in the first lens group
vd1: Average Abbe number of convex lens arranged in the first lens group If the conditional expression (2) is not satisfied, the desired imaging performance of the present invention cannot be obtained. For example, in the third and fourth embodiments of Patent Document 2, and in the shortest shooting distance state of the third embodiment of Patent Document 1, the maximum width of c-line to g-line at the center of the pupil is 70% image height. , 0.030 mm, 0.049 mm, and 0.024 mm, respectively. The aberration of the present invention is 0.021 mm or less.

（本発明の実施態様）
（実施態様１の説明）
本発明の撮影レンズにおいて、さらに、以下の条件式を満足することを特徴とする。
55＜vd3＜75 ・・・・・・・・・・・(3)
1.55＜nd3＜1.65 ・・・・・・・・・・(4)
nd3：第3レンズ群を構成する凸レンズのd線に対する屈折率
vd3：第3レンズ群を構成する凸レンズのアッベ数
条件式（３）は、物体距離無限遠時の軸上色収差を良好に補正するための条件である。
条件式（３）の上限を超えて、アッベ数が大きくなると、g線の軸上色収差がオーバー側にシフトし、最短撮影距離状態付近でg線フレアが増大し、例えば木の葉の縁が紫色に写るなどのパープルフリンジの問題を引き起こす。
条件式（３）の下限を超えてアッベ数が小さくなると、軸上色収差が増大し、物体距離無限遠状態のMTFの劣化を招く。 (Embodiment of the present invention)
(Description of Embodiment 1)
In the photographic lens of the present invention, the following conditional expression is further satisfied.
55 <vd3 <75 (3)
1.55 <nd3 <1.65 (4)
nd3: Refractive index for the d-line of the convex lens constituting the third lens group
vd3: Abbe number of the convex lens constituting the third lens group Conditional expression (3) is a condition for satisfactorily correcting axial chromatic aberration when the object distance is infinite.
When the Abbe number increases beyond the upper limit of conditional expression (3), the axial chromatic aberration of the g line shifts to the over side, and the g line flare increases near the shortest shooting distance state. It causes purple fringe problems such as reflections.
When the Abbe number decreases beyond the lower limit of conditional expression (3), axial chromatic aberration increases, leading to degradation of the MTF in the object distance infinite state.

条件式（４）は、屈折率を限定し、前記第４レンズ群を構成する凸レンズのレンズ面の周辺部分のダレ等の微小誤差による球面収差（以下、アキュラシー感度と呼ぶ）への影響を低くするためのものである。前記第４レンズ群は、光線束が特に太くなる部分であるため、このような加工誤差を予め見込んだ設計は必須である。
条件式（４）の上限値を超えて屈折率が大きくなると、アキュラシー感度が上昇し、加工誤差による球面収差変動が大きくなり、物体距離無限遠状態での中心解像力の著しい低下を招く。
逆に、条件式（４）の下限値を超えて、屈折率が小さくなり過ぎると、面の曲率半径が小さくなり、レンズ自体の重量が増大する。 Conditional expression (4) limits the refractive index, and affects the spherical aberration (hereinafter referred to as accuracy sensitivity) due to minute errors such as sagging of the peripheral portion of the lens surface of the convex lens constituting the fourth lens group. It is for lowering. Since the fourth lens group is a portion where the beam bundle is particularly thick, it is essential to design such a processing error in advance.
When the refractive index increases beyond the upper limit value of conditional expression (4), the accuracy of sensitivity increases, the spherical aberration fluctuations due to processing errors increase, and the central resolving power at an infinite object distance state is significantly reduced.
Conversely, if the refractive index becomes too small beyond the lower limit value of conditional expression (4), the radius of curvature of the surface becomes small and the weight of the lens itself increases.

（実施態様２の説明）
本発明の撮影レンズにおいて、さらに、以下の条件式を満足することを特徴とする。
-0.58＜f2/f＜-0.36 ・・・・・・・・・・(5)
f ：全系の焦点距離
f2 ：フォーカシング時移動するレンズ群中、最も物体側に位置する第２レンズ群の焦点距離
条件式（５）の下限値を超えると、前記第２レンズ群のフォーカシング時の移動量が増大し、前記第３レンズ群及び前記第４レンズ群のフォーカシング時の移動量が減少する。
条件式（５）の上限値を超えて焦点距離が短くなると、前記第２レンズ群のフォーカシング時の移動量が減少するが、前記第３レンズ群及び前記第４レンズ群のフォーカシング時の移動量が増大する。 (Description of Embodiment 2)
In the photographic lens of the present invention, the following conditional expression is further satisfied.
-0.58 <f2 / f <-0.36 (5)
f: focal length
f2: the focal length of the second lens group located closest to the object side in the lens group that moves during focusing exceeds the lower limit of conditional expression (5), the amount of movement of the second lens group during focusing increases; The amount of movement of the third lens group and the fourth lens group during focusing decreases.
When the focal length is shortened beyond the upper limit of conditional expression (5), the amount of movement of the second lens group during focusing decreases, but the amount of movement of the third lens group and the fourth lens group during focusing is reduced. Will increase.

本発明の撮影レンズにおいては、負の前記第２レンズ群と、正の前記第３レンズ群及び前記第５レンズ群は、前記第２レンズ群と前記第３レンズ群の間に配置された開口絞りに、互いに近づくように移動する。レンズ鏡筒を製品化するにあたって、例えば、カム筒により３つのレンズ群を動作させようとした場合、カメラの姿勢によるカム筒の作動負荷のバランス、つまりアクチュエータに過度な負荷がかからぬような設計としなくてはならない。例えば、上向き姿勢の場合、前記第２レンズ群は重力に倣い下がろうとし、それを受け前記第３レンズ群及び前記第４レンズ群は重力に逆らって上がろうとする力が働く。それらの力の和に均衡が保てない場合、カム筒を動かすアクチュエータに負荷を与えることになる。 In the photographic lens of the present invention, the negative second lens group, the positive third lens group, and the fifth lens group are openings arranged between the second lens group and the third lens group. Move the apertures closer together. When commercializing a lens barrel, for example, when trying to operate three lens groups with a cam barrel, the balance of the operating load of the cam barrel according to the camera posture, that is, no excessive load is applied to the actuator. Must be designed. For example, in the upward posture, the second lens group tries to follow the gravity, and the third lens group and the fourth lens group receive the force and try to move up against the gravity. If the sum of these forces cannot be balanced, a load is applied to the actuator that moves the cam cylinder.

すなわち、条件式（５）の範囲を超えると、レンズ群の移動量や重量が、適度なバランスを失い、作動性での問題を発生させる。 That is, when the range of the conditional expression (5) is exceeded, the movement amount and weight of the lens group lose an appropriate balance, causing a problem in operability.

（実施態様３の説明）
本発明の撮影レンズにおいて、さらに、以下の条件式を満足することを特徴とする。
0.28＜f4/f3＜1.95 ・・・・・・・・・・・・ (6)
f3：第3レンズ群の焦点距離
f4：第4レンズ群の焦点距離 (Description of Embodiment 3)
In the photographic lens of the present invention, the following conditional expression is further satisfied.
0.28 <f4 / f3 <1.95 (6)
f3: Focal length of the third lens group
f4: Focal length of the fourth lens group

条件式（６）は、第３レンズ群及び第４レンズ群の焦点距離の比を規定するものである。第３レンズ群及び第４レンズ群は、ともに正の屈折力を持ち、適度な屈折力を持ち、適度な屈折力の関係を保ち、収差補正とレンズ直径を適切にするものである。
路火
条件式（６）の上限を超え、第３レンズ群に対して第４レンズ群の焦点距離が長くなると、第３レンズ群が強い屈折力を持つようになり、特に球面収差がアンダーになり、また軸上付近の像高でのコマ収差が悪化し、一枚程度のレンズ枚数では収差を補正できない。条件式（６）の下限rを超え、第３レンズ群に対し第４レンズの焦点距離が短くなると、第４レンズ群を構成するレンズの曲率半径が小さくなってしまい、レンズ中心厚さの増大に伴い第３レンズ群の重量が大きくなる。これは移動レンズの作動性の悪化につながる。 Conditional expression (6) defines the ratio of the focal lengths of the third lens group and the fourth lens group. Both the third lens group and the fourth lens group have a positive refractive power, an appropriate refractive power, an appropriate refractive power relationship, and appropriate aberration correction and a lens diameter.
When the upper limit of the road fire conditional expression (6) is exceeded and the focal length of the fourth lens unit becomes longer with respect to the third lens unit, the third lens unit has a strong refractive power, and especially the spherical aberration is under. In addition, coma at the image height near the axis is deteriorated, and the aberration cannot be corrected with about one lens. If the lower limit r of the conditional expression (6) is exceeded and the focal length of the fourth lens is shortened with respect to the third lens group, the radius of curvature of the lenses constituting the fourth lens group becomes small, and the lens center thickness increases. Accordingly, the weight of the third lens group increases. This leads to deterioration of the operability of the moving lens.

（実施態様４の説明）
本発明の撮影レンズにおいて、さらに、以下の条件式を満足することを特徴とする。
-0.23＜D/FR＜-0.01 ・・・・・・・・・・・・(7)
FR：最像側凹レンズの焦点距離
D：最像側凹レンズと、それに隣接した凸レンズとの空気間隔 (Description of Embodiment 4)
In the photographic lens of the present invention, the following conditional expression is further satisfied.
-0.23 <D / FR <-0.01 (7)
FR: Focal length of the most image side concave lens
D: Air space between the most image side concave lens and the convex lens adjacent to it

一般的に、本発明の実施例にあるような焦点距離のＦ２．８程度の明るいレンズには、最終レンズに凸レンズ、隣接して物体側に凹レンズが配置される。この凹レンズの配置は、第１レンズ群で残存したアンダー側の球面収差を、凹レンズの物体側の面でオーバー側に出し、球面収差を打ち消すためである。最終レンズに凹レンズを配置すると、この打ち消しの効果が減少してしまうため、最も像側のレンズ群は凸としている。 Generally, in a bright lens having a focal length of about F2.8 as in the embodiment of the present invention, a convex lens is disposed on the final lens, and a concave lens is disposed adjacent to the object side. This concave lens is arranged so that the under-side spherical aberration remaining in the first lens group is brought out to the over side by the object-side surface of the concave lens, thereby canceling out the spherical aberration. If a concave lens is arranged in the final lens, the effect of this cancellation is reduced, so that the lens group closest to the image side is convex.

本発明では、請求項１に記載の構成とすることで、第１レンズ群の残存球面収差を小さくできる。その結果、従来技術のような、後方に球面収差の打ち消すためのレンズ群を配置することが不要となり、最も像側のレンズ群を負にすることができる。 In the present invention, the remaining spherical aberration of the first lens group can be reduced by adopting the configuration described in claim 1. As a result, it is not necessary to dispose a lens group for canceling spherical aberration behind as in the prior art, and the most image side lens group can be made negative.

凹レンズを配置することは、バックフォーカスを短くできることに加え、最も像側のレンズ群を像面側に寄せることにより、鏡筒内部の他のレンズ群との間隔を広げ、空間的なゆとりを確保することができる。このことにより鏡筒の機構を簡素化し、低コストな鏡筒を構成することを可能にする。
凹レンズを配置することは、近接する物体側レンズ群のレンズ外径を小さくできるので、鏡筒の設計がやり易くなるという利点もある。 In addition to shortening the back focus, placing a concave lens increases the distance between the lens group closest to the image side and the lens group inside the lens barrel, ensuring a large space. can do. This simplifies the mechanism of the lens barrel and makes it possible to construct a low-cost lens barrel.
The arrangement of the concave lens has an advantage that the lens barrel can be designed easily because the lens outer diameter of the adjacent object side lens group can be reduced.

凹レンズを配置することにより最も像側のレンズ群を像面側に寄せることは、該凹レンズ以外のレンズ群との間隔を広げ、製造時に、凸レンズと凹レンズとの空気間隔を利用し、バックフォーカス調整、球面収差調整など、製造時の調整の自由度も広げられる。
光学設計上は、空気間隔という自由度が一つ増えることで、球面収差、コマ収差の補正の自由度が高まる。 By placing the concave lens, the lens group closest to the image side is brought closer to the image plane side. The distance between the lens group other than the concave lens is widened, and the air gap between the convex lens and the concave lens is used during manufacturing to adjust the back focus. In addition, the degree of freedom of adjustment during manufacturing, such as spherical aberration adjustment, is expanded.
From the viewpoint of optical design, one degree of freedom in air spacing increases, so that the degree of freedom in correcting spherical aberration and coma aberration increases.

条件式（７）の下限値を超えると、球面収差やコマ収差の空気間隔に対しての誤差感度が大きくなってしまうため、製造上の困難をともなうことになるため好ましくない。 If the lower limit value of conditional expression (7) is exceeded, the error sensitivity of the spherical aberration and coma aberration with respect to the air spacing increases, which is not preferable because it causes manufacturing difficulties.

条件式（７）の上限値を超えると、バックフォーカスが短くなり過ぎ、軸外光線の撮像面への入射角度が急になり、画面周辺部での光量差、いわゆるシェーディングが発生するという問題が発生する。 When the upper limit value of conditional expression (7) is exceeded, the back focus becomes too short, the incident angle of off-axis rays to the imaging surface becomes steep, and a problem arises in that a difference in the amount of light at the periphery of the screen, so-called shading occurs. Occur.

本発明に係る実施形態１の撮影レンズの無限遠合焦状態の断面図であり、無限遠合焦状態からマクロ域にかけてのレンズ群の移動軌跡も実線で示す。1 is a cross-sectional view of an imaging lens of Embodiment 1 according to the present invention in an infinitely focused state, and the movement locus of a lens group from the infinitely focused state to the macro area is also indicated by a solid line. 本発明に係る実施形態１の撮影レンズの無限遠合焦状態の縦収差図である。FIG. 3 is a longitudinal aberration diagram of the photographing lens according to the first embodiment of the present invention in an infinitely focused state. 本発明に係る実施形態１の撮影レンズの撮影倍率０．５倍時の縦収差図である。FIG. 5 is a longitudinal aberration diagram of the photographing lens according to the first embodiment of the present invention when the photographing magnification is 0.5 times. 本発明に係る実施形態１の撮影レンズの撮影倍率等倍時の縦収差図である。FIG. 5 is a longitudinal aberration diagram at the same magnification of the photographing magnification of the photographing lens according to the first embodiment of the present invention. 本発明に係る実施形態１の撮影レンズの無限遠合焦状態の横収差図である。FIG. 3 is a lateral aberration diagram of the photographing lens according to the first embodiment of the present invention in an infinitely focused state. 本発明に係る実施形態１の撮影レンズの最短撮影距離時の横収差図である。FIG. 3 is a lateral aberration diagram at the shortest shooting distance of the shooting lens according to the first embodiment of the present invention. 本発明に係る実施形態１の撮影レンズの無限遠合焦状態の＋方向手振れの横収差図である。FIG. 6 is a lateral aberration diagram of a + direction camera shake of the photographing lens according to the first embodiment of the present invention in an infinite focus state. 本発明に係る実施形態１の撮影レンズの無限遠合焦状態の−方向手振れの横収差図である。FIG. 6 is a lateral aberration diagram of a negative direction camera shake of the photographing lens according to the first embodiment of the present invention in an infinitely focused state. 本発明に係る実施形態２の撮影レンズの無限遠合焦状態の断面図であり、無限遠合焦状態からマクロ域にかけてのレンズ群の移動軌跡も実線で示す。FIG. 6 is a cross-sectional view of an imaging lens of Embodiment 2 according to the present invention in an infinitely focused state, and the movement locus of a lens group from the infinitely focused state to the macro area is also indicated by a solid line. 本発明に係る実施形態２の撮影レンズの無限遠合焦状態の縦収差図である。FIG. 6 is a longitudinal aberration diagram of the photographing lens according to the second embodiment of the present invention in an infinitely focused state. 本発明に係る実施形態２の撮影レンズの撮影倍率０．５倍時の縦収差図である。FIG. 6 is a longitudinal aberration diagram of the photographing lens according to Embodiment 2 of the present invention when the photographing magnification is 0.5 times. 本発明に係る実施形態２の撮影レンズの撮影倍率等倍時の縦収差図である。FIG. 6 is a longitudinal aberration diagram at the same magnification of the photographing magnification of the photographing lens according to the second embodiment of the present invention. 本発明に係る実施形態２の撮影レンズの無限遠合焦状態の横収差図である。FIG. 6 is a lateral aberration diagram of the photographic lens of Embodiment 2 according to the present invention in an infinitely focused state. 本発明に係る実施形態２の撮影レンズの最短撮影距離時の横収差図である。FIG. 6 is a transverse aberration diagram at the shortest shooting distance of the shooting lens according to Embodiment 2 of the present invention. 本発明に係る実施形態２の撮影レンズの無限遠合焦状態の＋方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a + direction camera shake in the infinity focused state of the photographing lens according to Embodiment 2 of the present invention. 本発明に係る実施形態２の撮影レンズの無限遠合焦状態の−方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a negative direction camera shake in the infinity focus state of the photographing lens according to the second embodiment of the present invention. 本発明に係る実施形態３の撮影レンズの無限遠合焦状態の断面図であり、無限遠合焦状態からマクロ域にかけてのレンズ群の移動軌跡も実線で示す。FIG. 6 is a cross-sectional view of an imaging lens of Embodiment 3 according to the present invention in an infinitely focused state, and the movement locus of a lens group from the infinitely focused state to the macro area is also indicated by a solid line. 本発明に係る実施形態３の撮影レンズの無限遠合焦状態の縦収差図である。FIG. 10 is a longitudinal aberration diagram of the photographing lens according to Embodiment 3 of the present invention in an infinitely focused state. 本発明に係る実施形態３の撮影レンズの撮影倍率０．５倍時の縦収差図である。FIG. 6 is a longitudinal aberration diagram of the photographing lens according to Embodiment 3 of the present invention when the photographing magnification is 0.5 times. 本発明に係る実施形態３の撮影レンズの撮影倍率等倍時の縦収差図である。It is a longitudinal aberration diagram at the time of the photographing magnification of the photographing lens of Embodiment 3 according to the present invention at the same magnification. 本発明に係る実施形態３の撮影レンズの無限遠合焦状態の横収差図である。It is a transverse aberration diagram of the photographic lens of Embodiment 3 according to the present invention in an infinitely focused state. 本発明に係る実施形態３の撮影レンズの最短撮影距離時の横収差図である。It is a lateral aberration diagram at the time of the shortest shooting distance of the shooting lens of Embodiment 3 according to the present invention. 本発明に係る実施形態３の撮影レンズの無限遠合焦状態の＋方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a + direction camera shake in the infinity focused state of the photographing lens according to Embodiment 3 of the present invention. 本発明に係る実施形態３の撮影レンズの無限遠合焦状態の−方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a negative direction camera shake in the infinity focused state of the photographing lens according to the third embodiment of the present invention. 本発明に係る実施形態４の撮影レンズの無限遠合焦状態の断面図であり、無限遠合焦状態からマクロ域にかけてのレンズ群の移動軌跡も実線で示す。FIG. 6 is a cross-sectional view of an imaging lens of Embodiment 4 according to the present invention in an infinitely focused state, and the movement locus of a lens group from the infinitely focused state to the macro area is also indicated by a solid line. 本発明に係る実施形態４の撮影レンズの無限遠合焦状態の縦収差図である。FIG. 10 is a longitudinal aberration diagram of the photographing lens according to Embodiment 4 of the present invention in an infinitely focused state. 本発明に係る実施形態４の撮影レンズの撮影倍率０．５倍時の縦収差図である。FIG. 6 is a longitudinal aberration diagram of the photographing lens according to Embodiment 4 of the present invention when the photographing magnification is 0.5 times. 本発明に係る実施形態４の撮影レンズの撮影倍率等倍時の縦収差図である。FIG. 6 is a longitudinal aberration diagram at the same magnification of the photographing magnification of the photographing lens according to the fourth embodiment of the present invention. 本発明に係る実施形態４の撮影レンズの無限遠合焦状態の横収差図である。FIG. 10 is a lateral aberration diagram of the photographing lens according to Embodiment 4 of the present invention in an infinitely focused state. 本発明に係る実施形態４の撮影レンズの最短撮影距離時の横収差図である。It is a lateral aberration diagram at the time of the shortest shooting distance of the taking lens according to Embodiment 4 of the present invention. 本発明に係る実施形態４の撮影レンズの無限遠合焦状態の＋方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a + direction camera shake in a focused state at infinity of the photographing lens according to Embodiment 4 of the present invention. 本発明に係る実施形態４の撮影レンズの無限遠合焦状態の−方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a negative direction camera shake of the photographing lens according to the fourth embodiment of the present invention in an infinitely focused state. 本発明に係る実施形態５の撮影レンズの無限遠合焦状態の断面図であり、無限遠合焦状態からマクロ域にかけてのレンズ群の移動軌跡も実線で示す。FIG. 10 is a cross-sectional view of an imaging lens of Embodiment 5 according to the present invention in an infinite focus state, and the movement locus of a lens group from the infinite focus state to the macro area is also indicated by a solid line. 本発明に係る実施形態５の撮影レンズの無限遠合焦状態の縦収差図である。FIG. 10 is a longitudinal aberration diagram of the photographing lens according to Embodiment 5 of the present invention in an infinitely focused state. 本発明に係る実施形態５の撮影レンズの撮影倍率０．５倍時の縦収差図である。FIG. 10 is a longitudinal aberration diagram of the photographing lens according to Embodiment 5 of the present invention when the photographing magnification is 0.5 times. 本発明に係る実施形態５の撮影レンズの撮影倍率等倍時の縦収差図である。FIG. 9 is a longitudinal aberration diagram at the same magnification of the photographing magnification of the photographing lens according to the fifth embodiment of the present invention. 本発明に係る実施形態５の撮影レンズの無限遠合焦状態の横収差図である。FIG. 10 is a lateral aberration diagram of the photographing lens according to Embodiment 5 of the present invention in an infinitely focused state. 本発明に係る実施形態５の撮影レンズの最短撮影距離時の横収差図である。FIG. 10 is a lateral aberration diagram at the shortest shooting distance of the shooting lens according to Embodiment 5 of the present invention. 本発明に係る実施形態５の撮影レンズの無限遠合焦状態の＋方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a + direction camera shake in a focused state at infinity of the photographing lens according to Embodiment 5 of the present invention. 本発明に係る実施形態５の撮影レンズの無限遠合焦状態の−方向手振れの横収差図である。FIG. 10 is a lateral aberration diagram of a negative direction camera shake in the infinity focused state of the photographing lens according to the fifth embodiment of the present invention. 本発明に係る実施形態６の撮影レンズの無限遠合焦状態の断面図であり、無限遠合焦状態からマクロ域にかけてのレンズ群の移動軌跡も実線で示す。It is sectional drawing of the infinite point focusing state of the imaging lens of Embodiment 6 which concerns on this invention, and the movement locus | trajectory of the lens group from an infinite focusing state to a macro area is also shown as a continuous line. 本発明に係る実施形態６の撮影レンズの無限遠合焦状態の縦収差図である。It is a longitudinal aberration figure of the infinite point focusing state of the photographic lens of Embodiment 6 concerning the present invention. 本発明に係る実施形態６の撮影レンズの撮影倍率０．５倍時の縦収差図である。FIG. 10 is a longitudinal aberration diagram of the photographing lens according to the sixth embodiment of the present invention when the photographing magnification is 0.5 times. 本発明に係る実施形態６の撮影レンズの撮影倍率等倍時の縦収差図である。It is a longitudinal aberration figure at the time of imaging magnification equal magnification of the imaging lens of Embodiment 6 which concerns on this invention. 本発明に係る実施形態６の撮影レンズの無限遠合焦状態の横収差図である。It is a transverse aberration figure of the infinite focus state of the photographic lens of Embodiment 6 concerning the present invention. 本発明に係る実施形態６の撮影レンズの最短撮影距離時の横収差図である。It is a transverse aberration figure at the time of the shortest shooting distance of the taking lens of Embodiment 6 according to the present invention. 本発明に係る実施形態６の撮影レンズの無限遠合焦状態の＋方向手振れの横収差図である。It is a lateral aberration diagram of + direction camera shake in the infinitely focused state of the photographing lens according to Embodiment 6 of the present invention. 本発明に係る実施形態６の撮影レンズの無限遠合焦状態の−方向手振れの横収差図である。It is a lateral aberration diagram of -direction camera shake in the infinitely focused state of the taking lens according to Embodiment 6 of the present invention.

以下に示す実施形態を示す表において、Fno.はＦナンバー、ｆは全系の焦点距離、ωは半画角（°）、fBはバックフォーカス、Ｒは曲率半径、Ｄはレンズ厚み、レンズ間隔、Ndはd線の屈折率、vd線基準のアッベ数を示す。 In the tables showing the embodiments shown below, Fno. Is the F number, f is the focal length of the entire system, ω is the half field angle (°), fB is the back focus, R is the radius of curvature, D is the lens thickness, and the lens spacing. , Nd represents the refractive index of the d line and the Abbe number based on the vd line.

本発明の実施形態の撮影レンズ１０は、図１，図９，図１７，図２５，図３３，図４１の断面図に示すように、物体側から像側へ順に、正の屈折力の第１レンズ群１１、負の屈折力の第２レンズ群１２、正の屈折力の第３レンズ群１３、正の屈折力の第４レンズ群１４、手振れ補正時、光軸に対して略垂直方向に移動する負の屈折力の第５レンズ群１５と、正の屈折力の第６レンズ群１６とから構成される。フォーカシングにおいて、第１レンズ群１１、第５レンズ群１５、第６レンズ群１６は固定され、第２レンズ群１２は物体距離無限遠から至近距離にかけて光軸上を物体側から像面側へ移動し、第３レンズ群１３は光軸上を前後に移動し、第４レンズ群１４は物体距離無限遠から至近距離にかけて光軸上を像面側から物体側へ移動し、前記第１レンズ群１１は、少なくとも３枚以上の凸レンズと少なくとも１枚以上の凹レンズからなり、前記第３レンズ群１３は１枚の凸レンズからなる。 The photographing lens 10 according to the embodiment of the present invention has a positive refractive power in order from the object side to the image side, as shown in the cross-sectional views of FIGS. 1, 9, 17, 25, 33, and 41. 1 lens group 11, second lens group 12 with negative refractive power, third lens group 13 with positive refractive power, fourth lens group 14 with positive refractive power, when correcting camera shake, substantially perpendicular to optical axis The fifth lens group 15 having a negative refractive power moving to the sixth lens group 16 and the sixth lens group 16 having a positive refractive power. In focusing, the first lens group 11, the fifth lens group 15, and the sixth lens group 16 are fixed, and the second lens group 12 moves on the optical axis from the object side to the image plane side from the object distance infinity to the closest distance. The third lens group 13 moves back and forth on the optical axis, the fourth lens group 14 moves on the optical axis from the image plane side to the object side from the infinite object distance to the close distance, and the first lens group 11 The third lens group 13 includes one convex lens. The third lens group 13 includes at least three convex lenses and at least one concave lens.

図１，図９，図１７，図２５，図３３，図４１の断面図に示すレンズ群及びレンズセクションの移動軌跡は、フォーカシングにおいて静止しているものを点線で示し、移動するものを実線で示す。 The movement trajectories of the lens groups and lens sections shown in the cross-sectional views of FIGS. 1, 9, 17, 25, 33, and 41 are indicated by dotted lines when they are stationary in focusing, and are indicated by solid lines when moving. Show.

（実施形態１）
INF X0.5 X1.0
焦点距離 92.74 81.62 64.66
Fno 2.89 4.06 5.75
画角ω 13.12 7.72 4.03
光学全長 158.72 (Embodiment 1)
INF X0.5 X1.0
Focal length 92.74 81.62 64.66
Fno 2.89 4.06 5.75
Angle of view ω 13.12 7.72 4.03
Optical total length 158.72

面番号 R D Nd vd
1 236.1724 4.7932 1.77250 49.60
2 -134.3107 0.1500
3 63.0015 7.5198 1.43700 95.10
4 -90.2962 1.1920 1.84666 23.78
5 1612.2365 0.1500
6 41.7672 4.6981 1.43700 95.10
7 305.1013 D( 7)
8 192.1000 1.2000 1.81600 46.62
9 33.5120 4.9120
10 -46.9417 1.0000 1.48749 70.24
11 39.8523 3.3499
12 60.8772 3.1000 1.84666 23.78
13 -1857.9250 D(13)
14 STOP 0.0000 D(14)
15 344.4750 3.0050 1.59282 68.62
16 -85.8423 D(16)
17 110.2146 0.9000 1.72825 28.46
18 30.5835 6.4230 1.67790 55.35
19 -90.2521 D(19)
20 541.4261 0.8952 1.58913 61.13
21 23.2442 2.7112 1.80518 25.42
22 31.7632 10.1125
23 42.0889 4.9125 1.72000 50.23
24 -136.0043 6.0015
25 -67.7129 1.2000 1.84666 23.78
26 131.5116 44.5749
27 0.0000 D(27) Surface number RD Nd vd
1 236.1724 4.7932 1.77250 49.60
2 -134.3107 0.1500
3 63.0015 7.5198 1.43700 95.10
4 -90.2962 1.1920 1.84666 23.78
5 1612.2365 0.1500
6 41.7672 4.6981 1.43700 95.10
7 305.1013 D (7)
8 192.1000 1.2000 1.81600 46.62
9 33.5120 4.9120
10 -46.9417 1.0000 1.48749 70.24
11 39.8523 3.3499
12 60.8772 3.1000 1.84666 23.78
13 -1857.9250 D (13)
14 STOP 0.0000 D (14)
15 344.4750 3.0050 1.59282 68.62
16 -85.8423 D (16)
17 110.2146 0.9000 1.72825 28.46
18 30.5835 6.4230 1.67790 55.35
19 -90.2521 D (19)
20 541.4261 0.8952 1.58913 61.13
21 23.2442 2.7112 1.80518 25.42
22 31.7632 10.1125
23 42.0889 4.9125 1.72000 50.23
24 -136.0043 6.0015
25 -67.7129 1.2000 1.84666 23.78
26 131.5116 44.5749
27 0.0000 D (27)

（レンズ厚み、レンズ間隔）
F INF x0.5 x1.0
D( 7) 1.2000 9.8415 19.2488
D(13) 20.0500 11.4085 2.0012
D(14) 14.0000 9.2987 1.7000
D(16) 6.7201 1.0992 1.4506
D(19) 1.7996 12.1217 19.3690
D(27) 2.1644 2.2044 2.1892 (Lens thickness, lens spacing)
F INF x0.5 x1.0
D (7) 1.2000 9.8415 19.2488
D (13) 20.0500 11.4085 2.0012
D (14) 14.0000 9.2987 1.7000
D (16) 6.7201 1.0992 1.4506
D (19) 1.7996 12.1217 19.3690
D (27) 2.1644 2.2044 2.1892

（実施形態２）
INF x0.5 x1.0
焦点距離 92.73 81.26 64.27
Fno 2.88 4.43 5.77
画角ω 13.11 7.73 4.02
光学全長 158.82 (Embodiment 2)
INF x0.5 x1.0
Focal length 92.73 81.26 64.27
Fno 2.88 4.43 5.77
Angle of view ω 13.11 7.73 4.02
Optical total length 158.82

面番号 R D Nd Vd
1 165.2099 5.4500 1.72000 50.23
2 -137.3248 0.1500
3 63.1705 7.4500 1.43700 95.10
4 -94.5340 1.2000 1.84666 23.78
5 1050.8885 0.1500
6 41.6835 4.4000 1.43700 95.10
7 221.2241 D( 7)
8 162.6250 1.2000 1.81600 46.62
9 32.8151 5.0267
10 -46.0876 1.0000 1.48749 70.24
11 40.0762 3.5037
12 61.5513 3.0000 1.84666 23.78
13 -2237.7282 D(13)
14 STOP 0.0000 D(14)
15 317.4338 3.2000 1.59282 68.62
16 -80.7160 D(16)
17 105.2920 0.9000 1.72825 28.46
18 29.5764 6.5000 1.67790 55.35
19 -95.3679 D(19)
20 388.5153 0.9000 1.58913 61.13
21 22.7413 2.7000 1.80518 25.42
22 30.5439 10.0791
23 41.1691 4.9000 1.72000 50.23
24 -190.2840 5.7513
25 -79.9676 1.2000 1.84666 23.78
26 117.6040 43.4987
27 0.0000 D(27)
28 0.0000 0.0000 Surface number RD Nd Vd
1 165.2099 5.4500 1.72000 50.23
2 -137.3248 0.1500
3 63.1705 7.4500 1.43700 95.10
4 -94.5340 1.2000 1.84666 23.78
5 1050.8885 0.1500
6 41.6835 4.4000 1.43700 95.10
7 221.2241 D (7)
8 162.6250 1.2000 1.81600 46.62
9 32.8151 5.0267
10 -46.0876 1.0000 1.48749 70.24
11 40.0762 3.5037
12 61.5513 3.0000 1.84666 23.78
13 -2237.7282 D (13)
14 STOP 0.0000 D (14)
15 317.4338 3.2000 1.59282 68.62
16 -80.7160 D (16)
17 105.2920 0.9000 1.72825 28.46
18 29.5764 6.5000 1.67790 55.35
19 -95.3679 D (19)
20 388.5153 0.9000 1.58913 61.13
21 22.7413 2.7000 1.80518 25.42
22 30.5439 10.0791
23 41.1691 4.9000 1.72000 50.23
24 -190.2840 5.7513
25 -79.9676 1.2000 1.84666 23.78
26 117.6040 43.4987
27 0.0000 D (27)
28 0.0000 0.0000

（レンズ厚み、レンズ間隔）
F INF x0.5 x1.0
D( 7) 1.2001 9.6636 19.0827
D(13) 19.9758 11.5123 2.0933
D(14) 14.5889 9.1257 1.7000
D(16) 6.4281 1.4208 1.3855
D(19) 2.1476 12.6181 20.0790
D(27) 2.3520 2.3642 2.2847 (Lens thickness, lens spacing)
F INF x0.5 x1.0
D (7) 1.2001 9.6636 19.0827
D (13) 19.9758 11.5123 2.0933
D (14) 14.5889 9.1257 1.7000
D (16) 6.4281 1.4208 1.3855
D (19) 2.1476 12.6181 20.0790
D (27) 2.3520 2.3642 2.2847

（実施形態３）
IFN X0.5 X1.0
焦点距離 92.73 80.79 63.81
Fno 2.88 4.43 5.72
画角ω 13.12 7.73 4.00
光学全長 158.63 (Embodiment 3)
IFN X0.5 X1.0
Focal length 92.73 80.79 63.81
Fno 2.88 4.43 5.72
Angle of view ω 13.12 7.73 4.00
Optical total length 158.63

面番号 R D Nd Vd
1 177.3150 5.2000 1.72000 5.023
2 -134.2410 0.1500
3 64.2256 7.2000 1.43700 95.10
4 -93.7743 1.2000 1.84666 23.78
5 1465.3158 0.1500
6 41.9997 4.3000 1.43700 95.10
7 209.1412 D(7)
8 163.0969 1.2000 1.81600 46.62
9 33.8188 5.1284
10 -47.0686 1.2000 1.48749 70.24
11 40.9292 3.8339
12 64.9263 3.0210 1.84666 23.78
13 -1266.1412 D(13)
14STOP 0.0000 D(14)
15 293.0070 3.2000 1.59282 68.62
16 -83.0329 D(16)
17 103.6721 0.9000 1.72825 28.46
18 29.1996 6.5000 1.67790 55.35
19 -96.9183 D(19)
20 398.4147 0.9000 1.58913 61.13
21 22.6202 2.7000 1.80518 25.42
22 30.5119 10.5827
23 41.3634 4.9000 1.72000 50.23
24 -181.0634 6.0518
25 -77.8745 1.2000 1.84666 23.78
26 113.8858 43.1242
27 0.0000 D(27) Surface number RD Nd Vd
1 177.3150 5.2000 1.72000 5.023
2 -134.2410 0.1500
3 64.2256 7.2000 1.43700 95.10
4 -93.7743 1.2000 1.84666 23.78
5 1465.3158 0.1500
6 41.9997 4.3000 1.43700 95.10
7 209.1412 D (7)
8 163.0969 1.2000 1.81600 46.62
9 33.8188 5.1284
10 -47.0686 1.2000 1.48749 70.24
11 40.9292 3.8339
12 64.9263 3.0210 1.84666 23.78
13 -1266.1412 D (13)
14STOP 0.0000 D (14)
15 293.0070 3.2000 1.59282 68.62
16 -83.0329 D (16)
17 103.6721 0.9000 1.72825 28.46
18 29.1996 6.5000 1.67790 55.35
19 -96.9183 D (19)
20 398.4147 0.9000 1.58913 61.13
21 22.6202 2.7000 1.80518 25.42
22 30.5119 10.5827
23 41.3634 4.9000 1.72000 50.23
24 -181.0634 6.0518
25 -77.8745 1.2000 1.84666 23.78
26 113.8858 43.1242
27 0.0000 D (27)

（レンズ厚み、レンズ間隔）
F INF x0.5 x1.0
D(7) 1.2002 9.9245 19.6705
D(13) 20.2628 11.5385 1.7926
D(14) 13.9612 8.6518 1.3000
D(16) 6.4549 12.0374 19.4231
D(27) 2.3505 2.3618 2.2837 (Lens thickness, lens spacing)
F INF x0.5 x1.0
D (7) 1.2002 9.9245 19.6705
D (13) 20.2628 11.5385 1.7926
D (14) 13.9612 8.6518 1.3000
D (16) 6.4549 12.0374 19.4231
D (27) 2.3505 2.3618 2.2837

（実施形態４）
IFN X0.5 X1.0
焦点距離 92.73 74.97 57.92
Fno 2.91 4.43 5.76
画角ω 13.13 7.84 3.80
光学全長 156.32 (Embodiment 4)
IFN X0.5 X1.0
Focal length 92.73 74.97 57.92
Fno 2.91 4.43 5.76
Angle of view ω 13.13 7.84 3.80
Optical total length 156.32

面番号 R D Nd Vd
1 241.5144 4.2726 1.72000 50.23
2 -129.6424 0.1500
3 59.9675 6.4700 1.43700 95.10
4 -92.5070 1.2000 1.84666 23.78
5 3566.5773 0.1500
6 41.0671 3.8356 1.43700 95.10
7 147.1464 D( 7)
8 154.7009 1.2000 1.81600 46.62
9 35.6258 4.4490
10 -55.5172 1.2000 1.48749 70.24
11 40.2303 6.0000
12 72.1068 2.9819 1.84666 23.78
13 -2112.6158 D(13)
14 STOP 0.0000 D(14)
15 523.1207 3.6276 1.59282 68.62
16 -70.8459 D(16)
17 80.6914 0.9000 1.72825 28.46
18 26.9485 6.9234 1.67790 55.34
19 -135.8048 D(19)
20 200.3439 1.0000 1.58913 61.13
21 21.9232 2.8000 1.80518 25.42
22 28.4436 7.4243
23 34.0850 5.8369 1.51742 52.43
24 -131.4842 8.9993
25 -63.6030 1.2000 1.84666 23.78
26 134.1138 40.5142
27 0.0000 D(27) Surface number RD Nd Vd
1 241.5144 4.2726 1.72000 50.23
2 -129.6424 0.1500
3 59.9675 6.4700 1.43700 95.10
4 -92.5070 1.2000 1.84666 23.78
5 3566.5773 0.1500
6 41.0671 3.8356 1.43700 95.10
7 147.1464 D (7)
8 154.7009 1.2000 1.81600 46.62
9 35.6258 4.4490
10 -55.5172 1.2000 1.48749 70.24
11 40.2303 6.0000
12 72.1068 2.9819 1.84666 23.78
13 -2112.6158 D (13)
14 STOP 0.0000 D (14)
15 523.1207 3.6276 1.59282 68.62
16 -70.8459 D (16)
17 80.6914 0.9000 1.72825 28.46
18 26.9485 6.9234 1.67790 55.34
19 -135.8048 D (19)
20 200.3439 1.0000 1.58913 61.13
21 21.9232 2.8000 1.80518 25.42
22 28.4436 7.4243
23 34.0850 5.8369 1.51742 52.43
24 -131.4842 8.9993
25 -63.6030 1.2000 1.84666 23.78
26 134.1138 40.5142
27 0.0000 D (27)

（レンズ厚み、レンズ間隔）
F INF x0.5 x1.0
D( 7) 1.3987 10.6803 21.8457
D(13) 22.6922 13.4106 2.2452
D(14) 11.5705 7.9380 1.3000
D(16) 8.1557 2.0183 2.0219
D(19) 1.0481 10.8182 17.4525
D(27) 0.3526 0.4017 0.4082 (Lens thickness, lens spacing)
F INF x0.5 x1.0
D (7) 1.3987 10.6803 21.8457
D (13) 22.6922 13.4106 2.2452
D (14) 11.5705 7.9380 1.3000
D (16) 8.1557 2.0183 2.0219
D (19) 1.0481 10.8182 17.4525
D (27) 0.3526 0.4017 0.4082

（実施形態５）
IFN X0.5 X1.0
焦点距離 90.03 80.99 65.94
Fno 2.89 4.43 5.77
画角ω 13.54 7.93 3.99
光学全長 158.77 (Embodiment 5)
IFN X0.5 X1.0
Focal length 90.03 80.99 65.94
Fno 2.89 4.43 5.77
Angle of view ω 13.54 7.93 3.99
Optical total length 158.77

面番号 R D Nd vd
1 254.1830 4.8000 1.77250 49.60
2 -134.2602 0.1500
3 71.1795 7.5000 1.43700 95.10
4 -79.7054 1.2000 1.84666 23.78
5 -421.6392 0.1500
6 41.1357 4.7000 1.43700 95.10
7 576.7666 D( 7)
8 739.6983 1.2000 1.81600 46.62
9 34.3150 4.9000
10 -46.2414 1.0000 1.48749 70.24
11 40.2082 3.3500
12 61.0215 3.1000 1.84666 23.78
13 -46509.4627 D(13)
14 STOP 0.0000 D(14)
15 1251.2896 3.0000 1.59282 68.62
16 -67.5178 D(16)
17 125.6845 0.9000 1.72825 28.46
18 28.6128 6.4000 1.67790 55.35
19 -88.5026 D(19)
20 -1118.2138 0.9000 1.58913 61.13
21 24.2117 2.7000 1.80518 25.42
22 33.4446 10.1000
23 44.9283 4.9000 1.74855 49.30
24 -85.0423 6.8683
25 -56.3145 1.2000 1.82888 24.26
26 180.1778 43.9135
27 0.0000 D(27) Surface number RD Nd vd
1 254.1830 4.8000 1.77250 49.60
2 -134.2602 0.1500
3 71.1795 7.5000 1.43700 95.10
4 -79.7054 1.2000 1.84666 23.78
5 -421.6392 0.1500
6 41.1357 4.7000 1.43700 95.10
7 576.7666 D (7)
8 739.6983 1.2000 1.81600 46.62
9 34.3150 4.9000
10 -46.2414 1.0000 1.48749 70.24
11 40.2082 3.3500
12 61.0215 3.1000 1.84666 23.78
13 -46509.4627 D (13)
14 STOP 0.0000 D (14)
15 1251.2896 3.0000 1.59282 68.62
16 -67.5178 D (16)
17 125.6845 0.9000 1.72825 28.46
18 28.6128 6.4000 1.67790 55.35
19 -88.5026 D (19)
20 -1118.2138 0.9000 1.58913 61.13
21 24.2117 2.7000 1.80518 25.42
22 33.4446 10.1000
23 44.9283 4.9000 1.74855 49.30
24 -85.0423 6.8683
25 -56.3145 1.2000 1.82888 24.26
26 180.1778 43.9135
27 0.0000 D (27)

（レンズ厚み、レンズ間隔）
F INF x0.5 x1.0
D( 7) 1.2697 9.5022 18.6884
D(13) 19.4222 11.1897 2.0035
D(14) 5.3937 5.3996 1.7000
D(16) 17.6444 5.3361 1.4213
D(19) 1.7913 14.0938 21.7081
D(27) 0.3666 0.3014 0.3444 (Lens thickness, lens spacing)
F INF x0.5 x1.0
D (7) 1.2697 9.5022 18.6884
D (13) 19.4222 11.1897 2.0035
D (14) 5.3937 5.3996 1.7000
D (16) 17.6444 5.3361 1.4213
D (19) 1.7913 14.0938 21.7081
D (27) 0.3666 0.3014 0.3444

（実施形態６）
IFN X0.5 X1.0
焦点距離 92.72 81.70 65.33
Fno 2.93 4.43 5.77
画角ω 13.16 7.84 4.16
光学全長 158.82 (Embodiment 6)
IFN X0.5 X1.0
Focal length 92.72 81.70 65.33
Fno 2.93 4.43 5.77
Angle of view ω 13.16 7.84 4.16
Optical total length 158.82

面番号 R D Nd Vd
1 270.9036 4.8000 1.77250 49.62
2 -128.6509 0.1500
3 66.5181 7.5000 1.43700 95.10
4 -82.4895 1.2000 1.84666 23.78
5 -973.3204 0.1500
6 41.9449 4.7000 1.43700 95.10
7 420.3979 D( 7)
8 354.5857 1.2000 1.80420 46.50
9 34.1059 4.9000
10 -45.1558 1.0000 1.48749 70.44
11 39.6707 3.3500
12 61.4169 3.1000 1.84666 23.78
13 -3689.2708 D(13)
14 STOP 0.0000 D(14)
15 1219.8635 3.0000 1.61800 63.39
16 -74.9000 D(16)
17 100.8707 0.9000 1.72825 28.46
18 28.2958 6.4000 1.67790 55.35
19 -78.7023 D(19)
20 -491.8258 0.9000 1.58913 61.13
21 22.9260 2.7000 1.80518 25.42
22 31.9313 10.1220
23 44.6037 4.9000 1.69680 55.46
24 -107.3554 7.2003
25 -60.3891 1.2000 1.84666 23.78
26 290.3053 46.6888
27 0.0000 D(27) Surface number RD Nd Vd
1 270.9036 4.8000 1.77250 49.62
2 -128.6509 0.1500
3 66.5181 7.5000 1.43700 95.10
4 -82.4895 1.2000 1.84666 23.78
5 -973.3204 0.1500
6 41.9449 4.7000 1.43700 95.10
7 420.3979 D (7)
8 354.5857 1.2000 1.80420 46.50
9 34.1059 4.9000
10 -45.1558 1.0000 1.48749 70.44
11 39.6707 3.3500
12 61.4169 3.1000 1.84666 23.78
13 -3689.2708 D (13)
14 STOP 0.0000 D (14)
15 1219.8635 3.0000 1.61800 63.39
16 -74.9000 D (16)
17 100.8707 0.9000 1.72825 28.46
18 28.2958 6.4000 1.67790 55.35
19 -78.7023 D (19)
20 -491.8258 0.9000 1.58913 61.13
21 22.9260 2.7000 1.80518 25.42
22 31.9313 10.1220
23 44.6037 4.9000 1.69680 55.46
24 -107.3554 7.2003
25 -60.3891 1.2000 1.84666 23.78
26 290.3053 46.6888
27 0.0000 D (27)

（レンズ厚み、レンズ間隔）
F INF x0.5 x1.0
D( 7) 1.1998 9.5772 18.6257
D(13) 19.4374 11.0599 2.0115
D(14) 6.6108 5.1702 1.7000
D(16) 13.4020 5.4592 1.4274
D(19) 1.7889 11.1724 18.6743
D(27) 0.3437 0.4221 0.3877 (Lens thickness, lens spacing)
F INF x0.5 x1.0
D (7) 1.1998 9.5772 18.6257
D (13) 19.4374 11.0599 2.0115
D (14) 6.6108 5.1702 1.7000
D (16) 13.4020 5.4592 1.4274
D (19) 1.7889 11.1724 18.6743
D (27) 0.3437 0.4221 0.3877

各実施形態の条件式に係る値は、表１に示すとおりである。

Values according to the conditional expressions of each embodiment are as shown in Table 1.

Ｓ絞り
１０撮影レンズ
１１第１レンズ群
１２第２レンズ群
１３第３レンズ群
１４第４レンズ群
１５第５レンズ群
１６第６レンズ群 S stop 10 photographing lens 11 first lens group 12 second lens group 13 third lens group 14 fourth lens group 15 fifth lens group 16 sixth lens group

Claims

In order from the object side to the image side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and camera shake correction And a fifth lens group having a negative refractive power that moves in a direction substantially perpendicular to the optical axis, and a sixth lens group having a positive refractive power. The sixth lens group is fixed, the second lens group moves from the object side to the image plane side from the object distance infinity to the closest distance, the third lens group moves back and forth on the optical axis, The four lens groups move from the image plane side to the object side on the optical axis from the infinite object distance to the close distance, and the first lens group includes at least three convex lenses and at least one concave lens. The three lens groups are composed of one convex lens, and the fourth lens group is one set. A photographic lens that satisfies the following conditional expression.
(Rn1-Rn2) / (Rnl + Rn2) <0 (1)
nd1 <1.6 vd1 <67.5 (2)
Rn1: The radius of curvature of the object side of the concave lens located closest to the object side in the first lens group
Rn2: radius of curvature of the concave lens located closest to the object side in the first lens group
nd1: Average refractive index for the d-line of the convex lens arranged in the first lens group
vd1: average Abbe number of convex lenses arranged in the first lens group

The photographing lens according to claim 1, further satisfying the following conditional expression:
55 <vd3 <75 (3)
1.55 <nd3 <1.65 (4)
nd3: Refractive index for the d-line of the convex lens constituting the third lens group
vd3: Abbe number of the convex lens constituting the third lens group

The photographing lens according to claim 1, further satisfying the following conditional expression:
-0.58 <f2 / f <-0.36 (5)
f: focal length
f2: Focal length of the lens unit that is closest to the object among the lens units that move during focusing

The photographing lens according to claim 1, further satisfying the following conditional expression:
0.28 <f4 / f3 <1.95 (6)
f3: Focal length of the third lens group
f4: Focal length of the fourth lens group

2. The rear lens group according to claim 1, further comprising: a most concave lens on the most image side, a convex lens adjacent to the most concave lens on the object side, and satisfying the following condition. Shooting lens.
-0.23 <D / FR <-0.01 (7)
FR: Focal length of the most image side concave lens
D: Air space between the most image side concave lens and the convex lens adjacent to it