JP2013050674A - Standard lens - Google Patents
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Abstract
Description
この発明は、ズームレンズ、特に交換レンズシステム用途として最適な、小型で高画質な標準ズームレンズに関するものである。 The present invention relates to a zoom lens, and particularly to a standard zoom lens having a small size and high image quality, which is most suitable for an interchangeable lens system.
近年、レンズ交換式のデジタルカメラが広く一般に普及してきており、従来のいわゆるコンパクトタイプのデジタルカメラでは得られないような、高画質の魅力、ボケを生かした美しさ、レンズ交換による映像表現の楽しさ、等が認知されてきている。 In recent years, interchangeable-lens digital cameras have become widespread, and high image quality, beautiful blurry beauty, and enjoyment of image expression by exchanging lenses are not possible with conventional so-called compact digital cameras. , Etc. have been recognized.
これらのユーザーは、当初、ボディと標準ズームレンズのセットを購入してスタートするケースが多い。しかし、セット販売される標準ズームレンズは、安価で或る事が必要なため、Fナンバーが3.5〜5.6程度の物が多く、前記、写真の楽しさを覚えたユーザーには、より良い写真を写したいと考え、新たな交換レンズを購入するケースも多い。特に、高画質とボケに憧れ、大口径の交換レンズを希望するユーザーにとって、ボケを生かした写真を表現したいと思えば、Fナンバーが2.8もしくは2.8〜4程度の交換レンズの要望がある。 These users often start by purchasing a set of body and standard zoom lenses. However, standard zoom lenses that are sold as a set are inexpensive and require certain things, so many F-numbers are about 3.5 to 5.6. For users who have learned the joy of photography, Many people want to take better photos and buy new interchangeable lenses. In particular, for users who long for high image quality and blur, and want to use a large-diameter interchangeable lens, if you want to express a photograph that takes advantage of the blur, a request for an interchangeable lens with an F number of 2.8 or 2.8-4 is required. There is.
開放Fナンバーが2.8の先行例として、特許文献1や特許文献2がある。いずれも、ズーム全域でFナンバーが2.8となっている。前者は物体側から順に負屈折力、正屈折力、負屈折力、正屈折力、正屈折力の5群ズームであり、第2レンズ群の一部でフォーカスを行っている。 後者は、物体側から順に負屈折力、正屈折力、負屈折力、正屈折力、負屈折力、正屈折力の6群ズームであり、第5レンズ群でフォーカスを行っている。しかし、いずれの例もサイズが大きく携帯性が悪い。
また高画質な交換レンズの例としては特許文献3や特許文献4などがある。ともに物体側から順に負屈折力、正屈折力、正屈折力、負屈折力、正屈折力の5群ズームを構成しているが、例えば特許文献3ではFナンバーが3.4〜5.6と大きい。また、特許文献3ではフォーカス方式の言及はないが、仮に重量の小さい群(例えば、第2群あるいは第4群)でフォーカスすると、近距離での収差変動が大きくなってしまう。
一方、特許文献4では動画対応が考慮されているものの変倍比が2以下と高い変倍比を得ることができない。
As prior examples of the open F number of 2.8, there are
Examples of high-quality interchangeable lenses include Patent Document 3 and
On the other hand, in Japanese Patent Application Laid-Open No. 2004-260688, although the correspondence with moving images is considered, a high zoom ratio of 2 or less cannot be obtained.
一方、最近のデジタルカメラにおいては動画撮影の可能な製品が多く、レンズ交換式のデジタルカメラにおいてもボディの動画撮影機能に対応した交換レンズが求められている。 On the other hand, there are many products that can shoot moving images in recent digital cameras, and interchangeable lenses that support the moving image shooting function of the body are also required in interchangeable lens digital cameras.
従来の静止画カメラでは、一瞬の撮影チャンスを切り取る事が目的であったから、構図を決めた後に、撮影の瞬間に狙った被写体へピントが合っていれば良く、そのための機能が求められていた。具体的には、いわゆる位相差方式のオートフォーカス(AF)機能が採用されており、早さと精度を兼ね備えたAF方式であった。 With conventional still image cameras, the objective was to cut off an instant shooting opportunity, so after deciding on the composition, it was only necessary to focus on the subject that was aimed at the moment of shooting, and there was a need for a function for that purpose. . Specifically, a so-called phase difference type autofocus (AF) function is employed, and the AF method has both speed and accuracy.
しかし、動画撮影においては、一部のプロ用ビデオカメラを除き、多くの民生用ビデオカメラでは常時、AFを働かせて合焦状態を維持しておく必要がある。そのための方法として、撮像素子によるコントラストAF方式(いわゆる山登り方式)が採用されてきた。さらに、合焦状態を維持するために、フォーカスレンズを合焦位置の前後に、常に微小量動かすことによってコントラストの変化を測定しておき(ウォブリングと言われる)、合焦状態が変化していると判断された場合には、フォーカスレンズを適切に移動させる事によって、再度、合焦し直すように動作する。このウォブリング機能は、フレームレートに応じて非常に高速な動作を必要とするため、ウォブリングレンズには軽量化が必要である。 However, in moving image shooting, with the exception of some professional video cameras, many consumer video cameras must always be kept in focus by operating AF. As a method therefor, a contrast AF method (so-called hill-climbing method) using an image sensor has been adopted. Further, in order to maintain the in-focus state, the change in contrast is measured by moving the focus lens always by a minute amount before and after the in-focus position (referred to as wobbling), and the in-focus state changes. If it is determined that the focus lens is appropriately moved, the focus lens is moved again to operate again. Since this wobbling function requires a very high speed operation according to the frame rate, the wobbling lens needs to be reduced in weight.
本発明では、変倍比が3程度の標準ズームレンズにおいて、小型かつ明るく高画質であり、動画機能にも対応すべくウォブリング機能も考慮した標準ズームを提供するものである。 In the present invention, a standard zoom lens having a zoom ratio of about 3 is provided with a standard zoom that is compact and bright, has high image quality, and that takes into account the wobbling function to cope with the moving image function.
上述した課題を解決し、目的を達成するために、本発明のズームレンズは、物体側より順に、負屈折力の第1レンズ群、正屈折力の第2レンズ群、正屈折力の第3レンズ群、負屈折力の第4レンズ群、正屈折力の第5レンズ群を有し、各群の間隔を変えて変倍を行うズームレンズにおいて、広角端から望遠端への変倍に際し、第1レンズ群と第2レンズ群の間隔は減少、第2レンズ群と第3レンズ群の間隔は変化、第3レンズ群と第4レンズ群の間隔は増大、第4レンズ群と第5レンズ群の間隔は増大する事を特徴とする。 In order to solve the above-described problems and achieve the object, the zoom lens of the present invention includes, in order from the object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens having a positive refractive power. In a zoom lens having a lens group, a fourth lens group having a negative refractive power, and a fifth lens group having a positive refractive power, and performing zooming by changing the interval of each group, when zooming from the wide-angle end to the telephoto end, The distance between the first lens group and the second lens group decreases, the distance between the second lens group and the third lens group changes, the distance between the third lens group and the fourth lens group increases, and the fourth lens group and the fifth lens The group spacing is characterized by an increase.
本発明のズームレンズでは、像面補正機能を有する負屈折力の第1レンズ群と変倍機能を有する正屈折力の第3レンズ群以降との間に、正屈折力の第2レンズ群を配置している。この第2レンズ群は、広角側における周辺光束の光線高を下げ、第1レンズ群の外径を縮小する効果を有している。その結果、フィルター径を小さく成すことが可能でありレンズの小型化に寄与する。さらに、望遠側のFナンバーが小さい時、絞り径を小さく成す効果がある。これによって、絞り周りの鏡枠外径を小型化できている。 In the zoom lens according to the present invention, the second lens group having a positive refractive power is provided between the first lens group having a negative refractive power having an image surface correction function and the third lens group having a positive refractive power having a zooming function. It is arranged. This second lens group has the effect of lowering the beam height of the peripheral light beam on the wide angle side and reducing the outer diameter of the first lens group. As a result, it is possible to reduce the filter diameter and contribute to the miniaturization of the lens. Further, when the F-number on the telephoto side is small, there is an effect of reducing the aperture diameter. As a result, the outer diameter of the lens frame around the stop can be reduced.
さらに本発明のズームレンズでは、変倍作用は、主として第3レンズ群が担っているが、その負担が大きくなると、第3レンズ群の移動量が大きくなり大型化につながる、あるいは第3レンズ群の屈折力が強くなり、収差補正のバランスが崩れ好ましくない。そこで、第4レンズ群にも変倍作用を機能させており、第3レンズ群と第4レンズ群で適切に負担するようになっている。 Furthermore, in the zoom lens of the present invention, the zooming function is mainly borne by the third lens group. However, if the burden increases, the amount of movement of the third lens group increases, leading to an increase in size, or the third lens group. This increases the refractive power of the lens and undesirably unbalances aberration correction. Therefore, the zooming function is also functioned in the fourth lens group, and the third lens group and the fourth lens group are appropriately burdened.
また、本発明のズームレンズは、以下の条件式(1)、(2)、(3)を満たすことが好ましい。
1.2 < β4t/β4w < 2.5 ・・・(1)
0.1 < (d34t − d34w)/fw < 1.5 ・・・(2)
0.4 < (d45t − d45w)/fw < 3.2 ・・・(3)
但し、β4tは望遠端における前記第4レンズ群の横倍率、β4wは広角端における前記第4レンズ群の横倍率、
d34wは広角端における前記第3レンズ群と前記第4レンズ群の空気間隔、d34tは望遠端における前記第3レンズ群と前記第4レンズ群の空気間隔、d45wは広角端における前記第4レンズ群と前記第5レンズ群の空気間隔、d45tは望遠端における前記第4レンズ群と前記第5レンズ群の空気間隔、fwは広角端における全系焦点距離である。
The zoom lens according to the present invention preferably satisfies the following conditional expressions (1), (2), and (3).
1.2 <β 4t / β 4w <2.5 (1)
0.1 <(d 34t - d 34w ) / f w <1.5 ··· (2)
0.4 <(d 45t - d 45w ) / f w <3.2 ··· (3)
Where β 4t is the lateral magnification of the fourth lens group at the telephoto end, β 4w is the lateral magnification of the fourth lens group at the wide-angle end,
d 34w is the air gap between the third lens group and the fourth lens group at the wide angle end, d 34t is the air gap between the third lens group and the fourth lens group at the telephoto end, and d 45w is the air gap at the wide angle end. wherein the fourth lens group fifth lens group of the air gap, d 45t air gap of said fifth lens group and the fourth lens group at the telephoto end, the f w is a focal length at the wide angle end.
(1)式の下限を超えると、第4レンズ群の増倍作用が弱くなり、変倍比を確保するべく第3レンズ群の屈折力が強くなりすぎ、収差補正のバランスがくずれたり、第3レンズの移動量を増加させたりすることで、レンズ全長が長くなってしまう。 また(1)式の上限を超えると、第4レンズ群の移動量が大きくなる、あるいは屈折力が強くなりすぎ、収差補正のバランスが崩れ、好ましくない。 When the lower limit of the expression (1) is exceeded, the multiplication action of the fourth lens group becomes weak, the refractive power of the third lens group becomes too strong to ensure the zoom ratio, and the aberration correction balance is lost. Increasing the amount of movement of the three lenses increases the overall lens length. If the upper limit of the expression (1) is exceeded, the amount of movement of the fourth lens group becomes large or the refractive power becomes too strong, and the balance of aberration correction is lost, which is not preferable.
(2)式と(3)式の下限を超えると、第4レンズ群の増倍作用が弱くなり、第4レンズ群のレンズ径が大きくなる。(2)式及び(3)式の上限を超えると、レンズ全長の増大につながり、好ましくない。 When the lower limit of the expressions (2) and (3) is exceeded, the multiplication action of the fourth lens group becomes weak and the lens diameter of the fourth lens group becomes large. Exceeding the upper limits of the equations (2) and (3) is not preferable because it leads to an increase in the total lens length.
また、本発明のズームレンズは、以下の条件式(4)を満たすことが好ましい。
2.0 < f2 / fw < 13.0 ・・・(4)
但し、f2は前記第2レンズ群の焦点距離である。
In addition, the zoom lens according to the present invention preferably satisfies the following conditional expression (4).
2.0 <f 2 / f w < 13.0 ··· (4)
Here, f 2 is the focal length of the second lens group.
(4)式の下限を超えると、第2レンズ群の屈折力が強くなりすぎ、球面収差の補正が困難となる。また、(4)式の上限を超えると、第2レンズ群による小型化の効果が弱くなり、第1レンズ群の外径が大きくなり、絞り径も大きくなる事より好ましくない。 If the lower limit of the expression (4) is exceeded, the refractive power of the second lens group becomes too strong, and it becomes difficult to correct spherical aberration. If the upper limit of the expression (4) is exceeded, the effect of downsizing by the second lens group is weakened, and the outer diameter of the first lens group is increased, and the aperture diameter is also increased.
また、本発明のズームレンズは、以下の条件式(5)、(6)を満たすことが好ましい。
3 < ft / fw ・・・(5)
1.0 < fbw / fw < 1.9 ・・・(6)
但し、ft は望遠端における全系焦点距離、fbwは広角端におけるバックフォーカスであり、空気中に在るものとする。
The zoom lens according to the present invention preferably satisfies the following conditional expressions (5) and (6).
3 < ft / fw ... (5)
1.0 <f bw / f w <1.9 (6)
However, f t is the focal length at the telephoto end, the f bw a back focus at the wide angle end, and are intended to be in the air.
(5)式は変倍比に関するものであり、本発明の光学系の変倍比は3以上の高い変倍比に限定している。 また(6)式の下限を超えると、バックフォーカスが短くなりすぎ交換レンズシステムを満足できなくなる。 また、(6)式の上限を超えると、バックフォーカスが長くなってしまいレンズ全長の増大につながるので好ましくない。 Equation (5) relates to the zoom ratio, and the zoom ratio of the optical system of the present invention is limited to a high zoom ratio of 3 or more. If the lower limit of the expression (6) is exceeded, the back focus becomes too short to satisfy the interchangeable lens system. Further, if the upper limit of the expression (6) is exceeded, the back focus becomes long and the total length of the lens is increased, which is not preferable.
また、本発明のズームレンズは、前記第1レンズ群は物体側より順に負の第1レンズ、負の第2レンズ、正の第3レンズを有し、前記第4レンズ群は多くとも3枚以下のレンズから成り、少なくとも物体側より順に正レンズ、負レンズを有し、以下の条件式(7)、(8)を満たすことが好ましい。
60 < ν12 ・・・(7)
5 < |ν4p − ν4n| < 25 ・・・(8)
但し、ν12は前記第1レンズ群中の前記負の第2レンズのアッベ数、ν4pは前記第4レンズ群中の正レンズのアッベ数、ν4nは前記第4レンズ群中の負レンズのアッベ数である。
In the zoom lens of the present invention, the first lens group includes a negative first lens, a negative second lens, and a positive third lens in order from the object side, and the fourth lens group includes at most three lenses. It is preferable that the lens includes the following lenses, and has at least a positive lens and a negative lens in order from the object side, and satisfies the following conditional expressions (7) and (8).
60 <ν 12 (7)
5 <| ν 4p - ν 4n | <25 ··· (8)
Where ν 12 is the Abbe number of the negative second lens in the first lens group, ν 4p is the Abbe number of the positive lens in the fourth lens group, and ν 4n is the negative lens in the fourth lens group. Abbe number.
(7)式は、軸上色収差を補正するための条件式である。本発明のズームレンズは、中間焦点距離において軸上色収差が補正オーバーになり易いため、前記負の第2レンズの分散を抑えることで軸上色収差の補正を適切な範囲に抑えている。 Expression (7) is a conditional expression for correcting axial chromatic aberration. In the zoom lens according to the present invention, the axial chromatic aberration is likely to be overcorrected at the intermediate focal length. Therefore, the correction of the axial chromatic aberration is suppressed to an appropriate range by suppressing the dispersion of the negative second lens.
(8)式は色収差の補正を適切な範囲に抑えるための式である。
(8)式の下限を超えると、色補正の効果が無くなる。(8)式の上限を超えると、他の群との補正バランスが崩れてしまう。
Expression (8) is an expression for suppressing correction of chromatic aberration within an appropriate range.
If the lower limit of equation (8) is exceeded, the effect of color correction is lost. If the upper limit of equation (8) is exceeded, the correction balance with other groups will be lost.
また、本発明のズームレンズは、無限遠物点から至近物点へのフォーカスに際し、第4レンズ群が移動する事が好ましい。 In the zoom lens according to the present invention, it is preferable that the fourth lens group moves when focusing from an infinite object point to a close object point.
第4レンズ群をフォーカシング調節に使用することで、収差変動が小さくかつフォーカス機構も小さくすることができ、全系をコンパクトにすることができる。 By using the fourth lens group for focusing adjustment, the aberration variation is small and the focus mechanism can be made small, and the entire system can be made compact.
また、本発明のズームレンズは、以下の条件式(9)を満たすことが好ましい。
1.0 < |f4 / fw| < 7.0 ・・・(9)
但し、f4は前記第4レンズ群の焦点距離である。
The zoom lens according to the present invention preferably satisfies the following conditional expression (9).
1.0 <| f 4 / f w | <7.0 (9)
Here, f 4 is the focal length of the fourth lens group.
(9)式の下限を超えると、第4レンズ群の屈折力が強くなりすぎ、少ないレンズ枚数では十分な収差補正が出来なくなる。(9)式の上限を超えると、第4レンズ群の屈折力が弱くなりすぎて、移動量が大きくなり好ましくない。また収差変動も増加するので好ましくない。 If the lower limit of equation (9) is exceeded, the refractive power of the fourth lens group becomes too strong, and sufficient aberration correction cannot be performed with a small number of lenses. If the upper limit of the expression (9) is exceeded, the refractive power of the fourth lens group becomes too weak, and the amount of movement becomes large, which is not preferable. Also, aberration fluctuations increase, which is not preferable.
また、本発明のズームレンズは物体側より順に、負屈折力の第1レンズ群、正屈折力の第2レンズ群、正屈折力の第3レンズ群、負屈折力の第4レンズ群、正屈折力の第5レンズ群を有し、各群の間隔を変えて変倍を行うズームレンズにおいて、無限遠物点から至近物点へのフォーカスに際し、第4群および第5群が独立に移動する構成とすることが好ましい。 The zoom lens according to the present invention includes, in order from the object side, a first lens unit having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, and a positive lens unit. In a zoom lens that has a fifth lens unit with refractive power and performs zooming by changing the distance between each group, the fourth group and the fifth group move independently when focusing from an infinite object point to the closest object point. It is preferable to adopt a configuration to do so.
フォーカス群は軽量化が求められるので、本発明では第2レンズ群や第5レンズ群によるフォーカスも可能であるが、第4レンズ群が収差変動も小さく、好ましいと言える。しかしながら、第4レンズ群によるフォーカスにおいて、広角側での像面湾曲の変動が大きく、広角端のFナンバーが4程度であれば深度内に収まる程度であり問題ないと言えるが、Fナンバーが2.8クラスになると深度を越えてしまうため、第4レンズ群単独のフォーカスでは難しい。 Since the focus group is required to be light in weight, the second lens group and the fifth lens group can be focused in the present invention, but it can be said that the fourth lens group is preferable because the aberration variation is small. However, in the focus by the fourth lens group, the fluctuation of the curvature of field on the wide angle side is large, and if the F number at the wide angle end is about 4, it can be said that it is within the depth and there is no problem, but the F number is 2 Since it will exceed the depth at 8 class, it is difficult to focus with the fourth lens unit alone.
そこで、Fナンバーの小さいレンズでは像面湾曲の変動を補正するため、第4レンズ群の移動と同時に、第5レンズ群も移動させるようにすると良い。この時、第4レンズ群は全ズーム域で像側へ移動するが、第5レンズ群に関しては、広角側では像側へ移動、望遠側では物体側へ移動し、途中の中間焦点距離では停止する場所があるように移動する。これにより、ズーム全域で無限から至近まで像面湾曲の変動を補正できる。 Therefore, in order to correct the fluctuation of the field curvature in the lens having a small F number, it is preferable to move the fifth lens group simultaneously with the movement of the fourth lens group. At this time, the fourth lens group moves to the image side in the entire zoom range, but the fifth lens group moves to the image side on the wide angle side, moves to the object side on the telephoto side, and stops at an intermediate focal length on the way. Move so that there is a place to do. As a result, it is possible to correct the variation in field curvature from the infinity to the close range over the entire zoom range.
またフォーカス群を第4レンズ群とし、第5レンズ群をズームに際し固定する事は可能ではあり、このような場合、鏡枠構造の簡単化において有利である。 しかしながら本発明では、望遠側にて射出瞳位置が遠くなるため、第5レンズ群のレンズ径は望遠端の光束で決まっている。 そこで、広角端から望遠端へのズームにおいて、第5レンズ群を物体側へ移動させるようにすると、第5レンズ群のレンズ径を小さく出来るので小型化に有利である。 In addition, it is possible to use the fourth lens group as the focus group and fix the fifth lens group during zooming, which is advantageous in simplifying the lens frame structure. However, in the present invention, since the exit pupil position is farther on the telephoto side, the lens diameter of the fifth lens group is determined by the light beam at the telephoto end. Therefore, in zooming from the wide-angle end to the telephoto end, moving the fifth lens unit to the object side is advantageous in downsizing because the lens diameter of the fifth lens unit can be reduced.
また、本発明のズームレンズは、以下の条件式(10)を満たすことが好ましい。
0.4 < △4w/△5w < 2.0 ・・・(10)
但し、△4wは広角端における前記第4レンズ群のフォーカス移動量、△5wは広角端におけ
る前記第5レンズ群のフォーカス移動量であり、いずれも光軸方向への移動を正符号とする。
In addition, the zoom lens according to the present invention preferably satisfies the following conditional expression (10).
0.4 <△ 4w / △ 5w <2.0 (10)
However, Δ 4w is the focus movement amount of the fourth lens group at the wide-angle end, and Δ 5w is the focus movement amount of the fifth lens group at the wide-angle end, both of which are positive signs for movement in the optical axis direction.
(10)式の下限を超えて、第5レンズ群の移動量が大きくなると、広角端至近での像面湾曲が補正アンダーと成りすぎる。 逆に、(10)式の上限を超えて、第5レンズ群の移動量が小さいと、像面湾曲が補正オーバーのままで不十分となる。 If the amount of movement of the fifth lens unit increases beyond the lower limit of the expression (10), the curvature of field near the wide-angle end becomes too undercorrected. On the other hand, if the amount of movement of the fifth lens group is small beyond the upper limit of the expression (10), the curvature of field remains insufficiently overcorrected.
また、上述の各条件式については、更に以下のようにすることが好ましい。なお、各条件式の上限値のみ、もしくは下限値のみを新たな上限値、下限値としても良い。このようにすることで、各条件式で説明した効果をより有効に得ることができる。 Further, it is preferable that the above conditional expressions are further as follows. Only the upper limit value or only the lower limit value of each conditional expression may be used as the new upper limit value and lower limit value. By doing in this way, the effect demonstrated by each conditional expression can be acquired more effectively.
また以下のように条件式を変更する事で、より好ましい構成となる。
1.3 < β4t/β4w < 1.8 ・・・(1)’
0.3 < (d34t − d34w)/fw < 1.0 ・・・(2)’
1.0 < (d45t − d45w)/fw < 2.3 ・・・(3)’
5.0 < f2 / fw < 10.0 ・・・(4)’
3 < ft / fw ・・・(5)’
1.3 < fbw / fw < 1.7 ・・・(6)’
70 < ν12 ・・・(7)’
10 < |ν4p − ν4n| < 20 ・・・(8)’
2.4 < |f4 / fw| < 6.1 ・・・(9)’
0.7 < △4w/△5w < 2.0 ・・・(10)’
Moreover, it becomes a more preferable structure by changing a conditional expression as follows.
1.3 <β 4t / β 4w <1.8 (1) ′
0.3 <(d 34t - d 34w ) / f w <1.0 ··· (2) '
1.0 <(d 45t - d 45w ) / f w <2.3 ··· (3) '
5.0 <f 2 / f w < 10.0 ··· (4) '
3 < ft / fw ... (5) '
1.3 <f bw / f w <1.7 (6) ′
70 <ν 12 ··· (7) '
10 <| ν 4p - ν 4n | <20 ··· (8) '
2.4 <| f 4 / f w | <6.1 (9) ′
0.7 <△ 4w / △ 5w <2.0 (10) '
本発明によれば、変倍比が3程度の標準ズームレンズにおいて、小型かつ明るく高画質であり、動画機能にも対応すべくウォブリング機能も考慮した標準ズームを提供することができる。 According to the present invention, a standard zoom lens having a zoom ratio of about 3 can provide a standard zoom that is compact and bright, has high image quality, and that also takes into account the wobbling function in order to support the moving image function.
本実施形態のズームレンズ及び撮像装置の構成による作用効果を説明する。なお、この実施形態によって本発明は限定されるものではない。すなわち、実施形態の説明に当たって、例示のために特定の詳細な内容が多く含まれるが、これらの詳細な内容に色々なバリエーションや変更を加えても、本発明の範囲を超えない。従って、以下で説明する本発明の例示的な実施形態は、権利請求された発明に対して、一般性を失わせることなく、また、何ら限定をすることもなく、述べられたものである The effect by the structure of the zoom lens and imaging device of this embodiment is demonstrated. In addition, this invention is not limited by this embodiment. That is, in describing the embodiment, a lot of specific details are included for the purpose of illustration, but various variations and modifications may be added to these details without exceeding the scope of the present invention. Accordingly, the exemplary embodiments of the present invention described below are set forth without loss of generality or limitation to the claimed invention.
以下、本実施形態のズームレンズの実施例1〜9について説明する。実施例1〜9の無限遠物点合焦時の広角端(a)、中間焦点距離状態(b)、望遠端(c)のレンズ断面図をそれぞれ図1、図5、図9、図13、図17、図21、図25、図29、図33に、
実施例1〜9の至近(0.35m)物点合焦時の広角端(a)、中間焦点距離状態(b)、望遠端(c)のレンズ断面図をそれぞれ図2、図6、図10、図14、図18、図22、図26、図30、図34に示す。 図1、図5、図9、図13、図17、図21、図25、図29、図33、図2、図6、図10、図14、図18、図22、図26、図30、図34中、第1レンズ群はG1、第2レンズ群はG2、明るさ(開口)絞りはS、第3レンズ群はG3、第4レンズ群はG4、第5レンズ群はG5、電子撮像素子のカバーガラスの平行平板はC、像面はIで示してある。なお、カバーガラスCの表面に波長域制限用の多層膜を施してもよい。また、そのカバーガラスCにローパスフィルタ作用を持たせるようにしてもよい。
Examples 1 to 9 of the zoom lens according to the present embodiment will be described below. The lens cross-sectional views of the wide-angle end (a), the intermediate focal length state (b), and the telephoto end (c) when focusing on an object point at infinity in Examples 1 to 9 are shown in FIGS. 1, 5, 9, and 13, respectively. 17, FIG. 21, FIG. 25, FIG. 29, FIG.
FIGS. 2, 6, and 6 show lens cross-sectional views of the wide-angle end (a), the intermediate focal length state (b), and the telephoto end (c) when focusing on an object point in close proximity (0.35 m) in Examples 1 to 9, respectively. 10, 14, 18, 22, 26, 30, and 34. 1, 5, 9, 13, 17, 21, 25, 29, 33, 2, 6, 10, 14, 18, 18, 22, 26, and 30. 34, the first lens group is G1, the second lens group is G2, the brightness (aperture) stop is S, the third lens group is G3, the fourth lens group is G4, the fifth lens group is G5, and the electron The parallel plate of the cover glass of the image sensor is indicated by C, and the image plane is indicated by I. In addition, you may give the multilayer film for a wavelength range restriction | limiting to the surface of the cover glass C. FIG. Further, the cover glass C may have a low-pass filter action.
数値データはいずれも無限遠の被写体に合焦した状態でのデータである。各数値の長さの単位はmm、角度の単位は°(度)である。さらに、ズームデータは広角端、中間焦点距離状態、望遠端での値である。また、屈折力の正負は、近軸曲率半径に基づく。 All of the numerical data is data in a state where an object at infinity is focused. The unit of length of each numerical value is mm, and the unit of angle is ° (degree). Further, the zoom data are values at the wide-angle end, the intermediate focal length state, and the telephoto end. Further, the positive / negative of the refractive power is based on the paraxial radius of curvature.
また、ゴーストやフレア等の不要光をカットするために、明るさ絞り以外にフレア絞りを配置してもかまわない。フレア絞りは、第1レンズ群の物体側、第1レンズ群と2レンズ群の間、第2レンズ群と3レンズ群の間、第3レンズ群と4レンズ群の間、第4レンズ群と5レンズ群の間、第5レンズ群と像面の間のいずれの場所に配置しても良い。枠部材によりフレア光線をカットするように構成しても良いし、別の部材を構成しても良い。また光学系に直接印刷しても塗装してもシールなどを接着してもかまわない。またその形状は円形、楕円形、矩形、多角形、関数曲線で囲まれる範囲等、いかなる形状でもかまわない。また有害光束をカットするだけでなく画面周辺のコマフレア等の光束をカットしても良い。 Further, in order to cut unnecessary light such as ghost and flare, a flare stop other than the brightness stop may be arranged. The flare stop is on the object side of the first lens group, between the first lens group and the second lens group, between the second lens group and the third lens group, between the third lens group and the fourth lens group, You may arrange | position in any place between a 5th lens group and a 5th lens group and an image surface. The frame member may be configured to cut flare rays, or another member may be configured. Also, it may be printed directly on the optical system, painted, or bonded with a seal. The shape may be any shape such as a circle, an ellipse, a rectangle, a polygon, or a range surrounded by a function curve. Further, not only harmful light beams but also light beams such as coma flare around the screen may be cut.
また、各レンズには反射防止コートを行い、ゴーストやフレアを軽減してもかまわない。反射防止コートがマルチコートであれば、効果的にゴーストやフレアを軽減できる。ゴーストやフレアの発生を防止するためにレンズの空気接触面に反射防止コートを施すことは一般的に行われている。また赤外カットコートをレンズ面やカバーガラスの表面に施してもかまわない。 Further, each lens may be provided with an antireflection coating to reduce ghosts and flares. If the antireflection coating is a multi-coat, ghosts and flares can be effectively reduced. In order to prevent the occurrence of ghosts and flares, an antireflection coating is generally applied to the air contact surface of the lens. An infrared cut coat may be applied to the lens surface or the surface of the cover glass.
一方、接合レンズの接合面では、接着材の屈折率が空気の屈折率よりも十分高い。そのため、接合面での反射率は、もともと単層コート並みか、あるいはそれ以下となっていることが多い。そのため、接合レンズの接合面にあえて反射防止コートを施すことは少ない。しかしながら、接合面にも積極的に反射防止コートを施せば、さらにゴーストやフレアを軽減することができる。その結果、より良好な画像を得ることができるようになる。 On the other hand, at the cemented surface of the cemented lens, the refractive index of the adhesive is sufficiently higher than the refractive index of air. For this reason, the reflectance at the joint surface is often the same as or lower than that of the single layer coat. For this reason, it is rare to apply an antireflection coating to the cemented surface of the cemented lens. However, ghosts and flares can be further reduced by applying an antireflection coating to the joint surfaces. As a result, a better image can be obtained.
特に、最近になって普及してきた高屈折率硝材は、収差補正効果が高い。そのため、高屈折率硝材はカメラ光学系に多用されるようになってきている。ただし、高屈折率硝材を接合レンズとして用いた場合、接合面での反射も無視できなくなってくる。そのような場合、接合面に反射防止コートを施しておくことは特に効果的である。接合面コートの効果的な使用法に関しては、特開平2−27301号公報、特開2001−324676号公報、特開2005−92115号公報、米国特許第7116482号明細書等の特許文献に開示されている。 In particular, a high refractive index glass material that has recently become widespread has a high aberration correction effect. For this reason, high refractive index glass materials are increasingly used in camera optical systems. However, when a high refractive index glass material is used as a cemented lens, reflection on the cemented surface cannot be ignored. In such a case, it is particularly effective to provide an antireflection coating on the joint surface. The effective usage of the bonding surface coat is disclosed in Japanese Patent Laid-Open Nos. 2-27301, 2001-324676, 2005-92115, and US Pat. No. 7,116,482. ing.
これらの特許文献のズームレンズは正先行型のズームレンズで、第1レンズ群内の接合レンズ面コートについて述べられている。本実施形態の正屈折力の第1レンズ群内の接合レンズ面についてもこれら文献に開示されているごとく実施すればよい。使用するコート材としては、基盤となるレンズの屈折率と接着材の屈折率に応じて、比較的高屈折率なTa2O5、TiO2、Nb2O5、ZrO2、HfO2、CeO2、SnO2、In2O3、ZnO、Y2O3などのコート材、比較的低屈折率なMgF2、SiO2、Al2O3などのコート材、などを適宜選択し、位相条件を満たすような膜厚に設定すれば良い。 The zoom lenses of these patent documents are front-end zoom lenses, and describe the cemented lens surface coating in the first lens group. The cemented lens surface in the first lens unit having a positive refractive power according to the present embodiment may be implemented as disclosed in these documents. As the coating material to be used, Ta 2 O 5 , TiO 2 , Nb 2 O 5 , ZrO 2 , HfO 2 , CeO, which have a relatively high refractive index, depending on the refractive index of the base lens and the refractive index of the adhesive. 2, SnO 2, in 2 O 3, ZnO, Y 2 O 3 coating material such as a relatively low refractive index of MgF 2, SiO 2, coating materials such as Al 2 O 3, and appropriately selected, phase condition The film thickness may be set so as to satisfy the above.
当然のことながら、レンズの空気接触面へのコーティング同様、接合面コートをマルチコートとしても良い。2層あるいはそれ以上の膜数のコート材や膜厚を適宜組み合わせることで、更なる反射率の低減や、反射率の分光特性・角度特性等のコントロールなどを行うことが可能となる。また第1レンズ群以外のレンズ接合面についても、同様の思想に基づいて接合面コートを行うことが効果的なのは言うまでもない。 As a matter of course, the coating on the bonding surface may be a multi-coat as in the case of the coating on the air contact surface of the lens. By appropriately combining two or more layers of coating materials and film thicknesses, it becomes possible to further reduce the reflectance and control the spectral characteristics and angular characteristics of the reflectance. Needless to say, it is effective to coat the cemented surfaces other than the first lens group based on the same concept.
実施例1のズームレンズは、図1に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。
As shown in FIG. 1, the zoom lens of
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は像側に移動した後、物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動した後、像側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。
At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the image side and then moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the image side after moving to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、両凹負レンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと物体側に凹面を向けた負メニスカスレンズの接合レンズとからなる。第3レンズ群G3は、物体側に凸面を向けた正メニスカスレンズと、開口絞りと、物体側に凸面を向けた正メニスカスレンズと、両凸正レンズと、両凹負レンズと、両凸正レンズとからなる。第4レンズ群G4は、両凸正レンズと両凹負レンズの接合レンズとからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a biconcave negative lens, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens and a cemented lens of a negative meniscus lens having a concave surface directed toward the object side. The third lens group G3 includes a positive meniscus lens having a convex surface directed toward the object side, an aperture stop, a positive meniscus lens having a convex surface directed toward the object side, a biconvex positive lens, a biconcave negative lens, and a biconvex positive lens. It consists of a lens. The fourth lens group G4 is composed of a cemented lens made up of a biconvex positive lens and a biconcave negative lens. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第3レンズ群の最も物体側に存在する物体側に凸面を向けた正メニスカスレンズの物体側面と、第3レンズ群の最も像面側に存在する両凸正レンズの両面との5面に用いている。
なお、フォーカスレンズは第4レンズ群G4と第5レンズ群G5が独立に移動し、ウォブリングレンズは第4レンズ群G4である。
The aspheric surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, an object side surface of a positive meniscus lens having a convex surface facing the object side closest to the object side of the third lens group, The three lens groups are used on five surfaces including both surfaces of a biconvex positive lens existing closest to the image plane.
Note that the fourth lens group G4 and the fifth lens group G5 move independently of the focus lens, and the wobbling lens is the fourth lens group G4.
実施例2のズームレンズは、図5に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 As shown in FIG. 5, the zoom lens of Example 2 includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は像側に移動した後、物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動した後、像側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。
At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the image side and then moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the image side after moving to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、両凹負レンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと、物体側に凹面を向けた正メニスカスレンズと物体側に凹面を向けた負メニスカスレンズの接合レンズとからなる。第3レンズ群G3は、両凸正レンズと、開口絞りと、両凸正レンズと、両凸正レンズと、両凹負レンズと、両凸正レンズとからなる。第4レンズ群G4は、物体側に凸面を向けた負メニスカスレンズと、物体側に凸面を向けた正メニスカスレンズと物体側に凸面を向けた負メニスカスレンズの接合レンズとからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a biconcave negative lens, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens, a cemented lens of a positive meniscus lens having a concave surface facing the object side, and a negative meniscus lens having a concave surface facing the object side. The third lens group G3 includes a biconvex positive lens, an aperture stop, a biconvex positive lens, a biconvex positive lens, a biconcave negative lens, and a biconvex positive lens. The fourth lens group G4 includes a negative meniscus lens having a convex surface directed toward the object side, a positive meniscus lens having a convex surface directed toward the object side, and a cemented lens of a negative meniscus lens having a convex surface directed toward the object side. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第3レンズ群の最も物体側に存在する両凸正レンズの物体側面と、第3レンズ群の最も像面側に存在する両凸正レンズの両面との5面に用いている。
なお、フォーカスレンズは第4レンズ群G4と第5レンズ群G5が独立に移動し、ウォブリングレンズは第4レンズ群G4である。
The aspherical surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, the object side surface of the biconvex positive lens existing closest to the object side of the third lens group, and the most image of the third lens group. It is used for 5 surfaces including both surfaces of a biconvex positive lens existing on the surface side.
Note that the fourth lens group G4 and the fifth lens group G5 move independently of the focus lens, and the wobbling lens is the fourth lens group G4.
実施例3のズームレンズは、図9に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 The zoom lens of Example 3 includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side, as shown in FIG. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。 At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、両凹負レンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、物体側に凸面を向けた正平レンズと、物体側に凹面を向けた正メニスカスレンズと、物体側に凹面を向けた負メニスカスレンズとからなる。第3レンズ群G3は、開口絞りと、物体側に凹面を向けた正メニスカスレンズと、物体側に凹面を向けた正メニスカスレンズと両凹負レンズの接合レンズと、両凸正レンズと、両凹負レンズと、両凸正レンズと、両凸正レンズとからなる。第4レンズ群G4は、物体側に凸面を向けた負メニスカスレンズと物体側に凸面を向けた正メニスカスレンズの接合レンズとからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a biconcave negative lens, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a positive flat lens having a convex surface facing the object side, a positive meniscus lens having a concave surface facing the object side, and a negative meniscus lens having a concave surface facing the object side. The third lens group G3 includes an aperture stop, a positive meniscus lens having a concave surface directed toward the object side, a cemented lens of a positive meniscus lens having a concave surface directed toward the object side and a biconcave negative lens, a biconvex positive lens, It consists of a concave negative lens, a biconvex positive lens, and a biconvex positive lens. The fourth lens group G4 is composed of a negative meniscus lens having a convex surface directed toward the object side and a cemented lens of a positive meniscus lens having a convex surface directed toward the object side. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第3レンズ群の最も物体側に存在する物体側に凹面を向けた正メニスカスレンズの両面と、第3レンズ群の最も像面側に存在する両凸正レンズの物体側面との5面に用いている。
なお、フォーカスレンズは第4レンズ群G4と第5レンズ群G5が独立に移動し、ウォブリングレンズは第4レンズ群G4である。
The aspheric surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, both surfaces of a positive meniscus lens having a concave surface facing the object side closest to the object side of the third lens group, It is used for five surfaces, that is, the object side surface of a biconvex positive lens present on the most image side of the lens group.
Note that the fourth lens group G4 and the fifth lens group G5 move independently of the focus lens, and the wobbling lens is the fourth lens group G4.
実施例4のズームレンズは、図13に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 The zoom lens of Example 4 includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side, as shown in FIG. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。 At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、両凹負レンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと、両凸正レンズと、両凹負レンズとからなる。第3レンズ群G3は、開口絞りと、両凸正レンズと、両凹負レンズと、両凸正レンズと、両凸正レンズと両凹負レンズの接合レンズと、両凸正レンズとからなる。第4レンズ群G4は、物体側に凸面を向けた負メニスカスレンズと物体側に凸面を向けた正メニスカスレンズの接合レンズとからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a biconcave negative lens, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens, a biconvex positive lens, and a biconcave negative lens. The third lens group G3 includes an aperture stop, a biconvex positive lens, a biconcave negative lens, a biconvex positive lens, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconvex positive lens. . The fourth lens group G4 is composed of a negative meniscus lens having a convex surface directed toward the object side and a cemented lens of a positive meniscus lens having a convex surface directed toward the object side. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第2レンズ群の物体側から2枚目の両凸正レンズの両面と、第3レンズ群の物体面側から見て、両凸正レンズ、両凹負レンズの次に配置される両凸正レンズの両面の6面に用いている。
なお、フォーカスレンズは第4レンズ群G4と第5レンズ群G5が独立に移動し、ウォブリングレンズは第4レンズ群G4である。
The aspherical surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, both surfaces of the second biconvex positive lens from the object side of the second lens group, and the object surface of the third lens group. When viewed from the side, it is used for six surfaces on both sides of a biconvex positive lens disposed next to a biconvex positive lens and a biconcave negative lens.
Note that the fourth lens group G4 and the fifth lens group G5 move independently of the focus lens, and the wobbling lens is the fourth lens group G4.
実施例5のズームレンズは、図17に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 The zoom lens of Example 5 includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side, as shown in FIG. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。 At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、両凹負レンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと、両凹負レンズとからなる。第3レンズ群G3は、両凸正レンズと、開口絞りと、両凹負レンズと、両凸正レンズと、両凸正レンズと物体側に凹面を向けた負メニスカスレンズの接合レンズと、両凸正レンズとからなる。第4レンズ群G4は、両凸正レンズと両凹負レンズの接合レンズとからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a biconcave negative lens, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens and a biconcave negative lens. The third lens group G3 includes a biconvex positive lens, an aperture stop, a biconcave negative lens, a biconvex positive lens, a cemented lens of a biconvex positive lens and a negative meniscus lens having a concave surface facing the object side, Consists of a convex positive lens. The fourth lens group G4 is composed of a cemented lens made up of a biconvex positive lens and a biconcave negative lens. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第2レンズ群の最も物体側に存在する両凸正レンズの両面と、第3レンズ群の物体面側から見て、両凸正レンズ、両凹負レンズの次に配置される両凸正レンズの両面の6面に用いている。
なお、フォーカスレンズは第4レンズ群G4と第5レンズ群G5が独立に移動し、ウォブリングレンズは第4レンズ群G4である。
The aspherical surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, both surfaces of a biconvex positive lens existing closest to the object side of the second lens group, and the object surface side of the third lens group. From the perspective, the biconvex positive lens and the biconcave negative lens are used next to the biconvex positive lens on both sides.
Note that the fourth lens group G4 and the fifth lens group G5 move independently of the focus lens, and the wobbling lens is the fourth lens group G4.
実施例6のズームレンズは、図21に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 The zoom lens of Embodiment 6 includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side, as shown in FIG. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。 At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、両凹負レンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと、物体側に凹面を向けた負メニスカスレンズとからなる。第3レンズ群G3は、両凸正レンズと、開口絞りと、両凹負レンズと、両凸正レンズと、両凸正レンズとからなる。第4レンズ群G4は、両凸正レンズと両凹負レンズの接合レンズとからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a biconcave negative lens, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens and a negative meniscus lens having a concave surface directed toward the object side. The third lens group G3 includes a biconvex positive lens, an aperture stop, a biconcave negative lens, a biconvex positive lens, and a biconvex positive lens. The fourth lens group G4 is composed of a cemented lens made up of a biconvex positive lens and a biconcave negative lens. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第2レンズ群の最も物体側に存在する両凸正レンズの両面と、第3レンズ群の物体面側から見て、両凸正レンズ、両凹負レンズの次に配置される両凸正レンズの両面の6面に用いている。
なお、フォーカスレンズとウォブリングレンズともに第4レンズ群G4である。
The aspherical surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, both surfaces of a biconvex positive lens existing closest to the object side of the second lens group, and the object surface side of the third lens group. From the perspective, the biconvex positive lens and the biconcave negative lens are used next to the biconvex positive lens on both sides.
The focus lens and the wobbling lens are in the fourth lens group G4.
実施例7のズームレンズは、図25に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 As shown in FIG. 25, the zoom lens according to the seventh embodiment includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。 At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、物体側に凸面を向けた負メニスカスレンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと、物体側に凹面を向けた負メニスカスレンズとからなる。第3レンズ群G3は、物体側に凸面を向けた正メニスカスレンズと、開口絞りと、両凹負レンズと、両凸正レンズと、両凸正レンズとからなる。第4レンズ群G4は、両凹負レンズからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a negative meniscus lens having a convex surface directed toward the object side, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens and a negative meniscus lens having a concave surface directed toward the object side. The third lens group G3 includes a positive meniscus lens having a convex surface directed toward the object side, an aperture stop, a biconcave negative lens, a biconvex positive lens, and a biconvex positive lens. The fourth lens group G4 is composed of a biconcave negative lens. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第2レンズ群の最も物体側に存在する両凸正レンズの両面と、第3レンズ群の物体面側から見て、両凸正レンズ、両凹負レンズの次に配置される両凸正レンズの両面の6面に用いている。
なお、フォーカスレンズは第5レンズ群G5であり、ウォブリングレンズは第4レンズ群G4である。
The aspherical surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, both surfaces of a biconvex positive lens existing closest to the object side of the second lens group, and the object surface side of the third lens group. From the perspective, the biconvex positive lens and the biconcave negative lens are used next to the biconvex positive lens on both sides.
The focus lens is the fifth lens group G5, and the wobbling lens is the fourth lens group G4.
実施例8のズームレンズは、図29に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 As shown in FIG. 29, the zoom lens according to the eighth embodiment includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。 At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、物体側に凸面を向けた負メニスカスレンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと、物体側に凸面を向けた負メニスカスレンズとからなる。第3レンズ群G3は、物体側に凸面を向けた正メニスカスレンズと、開口絞りと、両凹負レンズと、両凸正レンズと、物体側に凸面を向けた負メニスカスレンズと両凸正レンズの接合レンズからなる。第4レンズ群G4は、物体側に凹面を向けた負メニスカスレンズからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a negative meniscus lens having a convex surface directed toward the object side, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens and a negative meniscus lens having a convex surface directed toward the object side. The third lens group G3 includes a positive meniscus lens having a convex surface directed toward the object side, an aperture stop, a biconcave negative lens, a biconvex positive lens, a negative meniscus lens having a convex surface directed toward the object side, and a biconvex positive lens. It consists of a cemented lens. The fourth lens group G4 is composed of a negative meniscus lens having a concave surface directed toward the object side. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第2レンズ群の最も物体側に存在する両凸正レンズの物体側面と、第3レンズ群の最も物体側に存在する物体側に凸面を向けた正メニスカスレンズの物体側面と、その後の両凹負レンズの次に配置される両凸正レンズの両面の6面に用いている。
なお、フォーカスレンズは第2レンズ群G2であり、ウォブリングレンズは第4レンズ群G4である。
The aspherical surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, the object side surface of a biconvex positive lens existing closest to the object side of the second lens group, and the most object of the third lens group. It is used on the six sides of the object side surface of a positive meniscus lens having a convex surface facing the object side existing on the side, and both surfaces of a biconvex positive lens disposed next to the subsequent biconcave negative lens.
The focus lens is the second lens group G2, and the wobbling lens is the fourth lens group G4.
実施例9のズームレンズは、図33に示すように、物体側から順に、負の屈折力の第1レンズ群G1と、正の屈折力の第2レンズ群G2と、明るさ絞りSを含む正の屈折力の第3レンズ群G3と、負の屈折力の第4レンズ群G4と、正の屈折力の第5レンズ群G5とを有している。 The zoom lens of Example 9 includes a first lens group G1 having a negative refractive power, a second lens group G2 having a positive refractive power, and an aperture stop S in order from the object side, as shown in FIG. The third lens group G3 has a positive refractive power, the fourth lens group G4 has a negative refractive power, and the fifth lens group G5 has a positive refractive power.
広角端から望遠端にかけての変倍時、第1レンズ群G1は像側に移動した後、物体側に移動する。第2レンズ群G2は物体側に移動する。第3レンズ群G3は物体側へ移動する。第4レンズ群G4は物体側に移動する。第5レンズ群G5は物体側に移動する。よって、レンズ群の間隔は、第1レンズ群G1と第2レンズ群G2との間隔が変化し、第2レンズ群G2と第3レンズ群G3との間隔が変化し、第3レンズ群G3と第4レンズ群G4との間隔が変化し、第4レンズ群G4と第5レンズ群G5との間隔が変化する。 At the time of zooming from the wide angle end to the telephoto end, the first lens group G1 moves to the image side and then moves to the object side. The second lens group G2 moves to the object side. The third lens group G3 moves to the object side. The fourth lens group G4 moves to the object side. The fifth lens group G5 moves to the object side. Therefore, the distance between the lens groups is such that the distance between the first lens group G1 and the second lens group G2 changes, the distance between the second lens group G2 and the third lens group G3 changes, and the third lens group G3 The distance between the fourth lens group G4 changes and the distance between the fourth lens group G4 and the fifth lens group G5 changes.
物体側から順に、第1レンズ群G1は、物体側に凸面を向けた負メニスカスレンズと、物体側に凸面を向けた負メニスカスレンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第2レンズ群G2は、両凸正レンズと、物体側に凹面を向けた負メニスカスレンズとからなる。第3レンズ群G3は、両凸正レンズと、開口絞りと、両凹負レンズと、両凸正レンズと、物体側に凸面を向けた正メニスカスレンズとからなる。第4レンズ群G4は、両凸正レンズと両凹負レンズの接合レンズとからなる。第5レンズ群G5は、両凸正レンズからなる。 In order from the object side, the first lens group G1 includes a negative meniscus lens having a convex surface directed toward the object side, a negative meniscus lens having a convex surface directed toward the object side, and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a biconvex positive lens and a negative meniscus lens having a concave surface directed toward the object side. The third lens group G3 includes a biconvex positive lens, an aperture stop, a biconcave negative lens, a biconvex positive lens, and a positive meniscus lens having a convex surface directed toward the object side. The fourth lens group G4 is composed of a cemented lens made up of a biconvex positive lens and a biconcave negative lens. The fifth lens group G5 is composed of a biconvex positive lens.
非球面は、第1レンズ群の物体側に凸面を向けた負メニスカスレンズの両面と、第2レンズ群の最も物体側に存在する両凸正レンズの両面と、第3レンズ群の物体面側から見て、両凸正レンズ、両凹負レンズの次に配置される両凸正レンズの両面の6面に用いている。
なお、フォーカスレンズは第4レンズ群G4と第5レンズ群G5が独立に移動し、ウォブリングレンズは第4レンズ群G4である。
The aspherical surface includes both surfaces of a negative meniscus lens having a convex surface facing the object side of the first lens group, both surfaces of a biconvex positive lens existing closest to the object side of the second lens group, and the object surface side of the third lens group. From the perspective, the biconvex positive lens and the biconcave negative lens are used next to the biconvex positive lens on both sides.
Note that the fourth lens group G4 and the fifth lens group G5 move independently of the focus lens, and the wobbling lens is the fourth lens group G4.
以下に、上記各実施例の数値データを示す。記号は上記の外、fは全系焦点距離、fbはバックフォーカス、f1、f2…は各レンズ群の焦点距離、IH(FIY)は像高、Fno.はFナンバー、ωは半画角、広角は広角端、中間は中間焦点距離状態、望遠は望遠端、rは各レンズ面の曲率半径、dは各レンズ面間の間隔、ndは各レンズのd線の屈折率、νdは各レンズのアッベ数である。後述する全長は、レンズ最前面からレンズ最終面までの距離にバックフォーカスを加えたものである。fb(バックフォーカス)は、レンズ最終面から近軸像面までの距離を空気換算して表したものである。 Below, the numerical data of each said Example are shown. Symbols are the above, f is the focal length of the entire system, fb is the back focus, f1, f2... Are the focal lengths of each lens group, IH (FIY) is the image height, Fno. Is the F number, ω is the half angle of view, Wide angle is the wide angle end, middle is the intermediate focal length state, telephoto is the telephoto end, r is the radius of curvature of each lens surface, d is the distance between the lens surfaces, nd is the refractive index of the d-line of each lens, and νd is each lens Abbe number. The total length described later is obtained by adding back focus to the distance from the lens front surface to the lens final surface. fb (back focus) represents the distance from the last lens surface to the paraxial image plane in terms of air.
なお、非球面形状は、xを光の進行方向を正とした光軸とし、yを光軸と直交する方向にとると、下記の式にて表される。 The aspherical shape is represented by the following formula, where x is an optical axis with the light traveling direction being positive, and y is a direction orthogonal to the optical axis.
x=(y2/r)/[1+{1−(K+1)(y/r)2}1/2]
+A4y4+A6y6+A8y8+A10y10+A12y12
ただし、rは近軸曲率半径、Kは円錐係数、A4、A6、A8、A10、A12はそれぞれ4次、6次、8次、10次、12次の非球面係数である。また、非球面係数において、「e−n」(nは整数)は、「10-n」を示している。
x = (y 2 / r) / [1+ {1- (K + 1) (y / r) 2 } 1/2 ]
+ A 4 y 4 + A 6 y 6 + A 8 y 8 + A 10 y 10 + A 12 y 12
Where r is the paraxial radius of curvature, K is the conic coefficient, and A 4 , A 6 , A 8 , A 10 , and A 12 are the fourth, sixth, eighth, tenth, and twelfth aspheric coefficients, respectively. . In the aspheric coefficient, “e−n” (n is an integer) indicates “10 −n ”.
数値実施例1
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 60.5835 3.000 1.80610 40.92
2 17.0000 13.062
3 -52.1483 2.200 1.48749 70.23
4 36.0857 1.274
5 37.6315 3.904 1.92286 18.90
6 120.5021 可変
7 60.5278 6.628 1.73800 32.26
8 -29.7557 1.567 2.00069 25.46
9 -2077.5140 可変
10 25.2818 5.526 1.58313 59.38
11 186.2490 2.108
12 絞り 2.362
13 25.5283 5.477 1.49700 81.54
14 1047.3915 0.150
15 44.5072 5.250 1.49700 81.54
16 -37.8231 0.100
17 -36.2454 1.400 1.73800 32.26
18 15.8354 3.660
19 23.6072 3.805 1.80610 40.92
20 -212.0230 可変
21 59.7094 1.824 1.92286 18.90
22 -230.3045 1.200 1.90366 31.32
23 22.2311 可変
24 40.0940 4.470 1.49700 81.54
25 -60.7372 可変
26 ∞ 4.000 1.51633 64.14
27 ∞ 0.800
非球面データ
第1面
k=-0.5014
第2面
k=-1.0036
A4=1.0637e-05,A6=1.0242e-08
第10面
k=0.000
A4=-5.5983e-06,A6=-9.5203e-10,A8=-2.6951e-13
第19面
k=0.000
A4=-5.8200e-07,A6=5.2931e-08,A8=-2.3156e-10
第20面
k=0.000
A4=1.1245e-05,A6=5.6368e-08,A8=-3.4377e-10
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.249 21.897 39.081 12.099 21.376 37.934
Fno. 2.88 2.88 2.88 2.85 2.81 2.81
画角2ω 85.27 52.86 30.85 85.00 52.55 31.13
fb (in air) 16.194 17.958 16.192 15.412 18.267 18.067
全長 (in air) 140.24 122.13 131.16 140.25 122.13 131.15
d6 19.9477 10.1451 3.8548 19.9477 10.1451 3.8548
d9 30.1701 8.9967 1.5000 30.1701 8.9967 1.5000
d20 1.5000 5.8558 11.7363 2.8888 7.4894 14.7738
d23 2.1027 8.8471 27.5524 1.5007 6.8993 22.6235
d25 12.7560 14.5200 12.7543 11.9744 14.8288 14.6290
群焦点距離
f1=-24.82 f2=236.25 f3=30.26 f4=-41.47 f5=49.32
Numerical example 1
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 60.5835 3.000 1.80610 40.92
2 17.0000 13.062
3 -52.1483 2.200 1.48749 70.23
4 36.0857 1.274
5 37.6315 3.904 1.92286 18.90
6 120.5021 Variable
7 60.5278 6.628 1.73800 32.26
8 -29.7557 1.567 2.00069 25.46
9 -2077.5140 Variable
10 25.2818 5.526 1.58313 59.38
11 186.2490 2.108
12 Aperture 2.362
13 25.5283 5.477 1.49700 81.54
14 1047.3915 0.150
15 44.5072 5.250 1.49700 81.54
16 -37.8231 0.100
17 -36.2454 1.400 1.73800 32.26
18 15.8354 3.660
19 23.6072 3.805 1.80610 40.92
20 -212.0230 Variable
21 59.7094 1.824 1.92286 18.90
22 -230.3045 1.200 1.90366 31.32
23 22.2311 Variable
24 40.0940 4.470 1.49700 81.54
25 -60.7372 Variable
26 ∞ 4.000 1.51633 64.14
27 ∞ 0.800
Aspheric data first surface
k = -0.5014
Second side
k = -1.0036
A4 = 1.0637e-05, A6 = 1.0242e-08
10th page
k = 0.000
A4 = -5.5983e-06, A6 = -9.5203e-10, A8 = -2.6951e-13
19th page
k = 0.000
A4 = -5.8200e-07, A6 = 5.2931e-08, A8 = -2.3156e-10
20th page
k = 0.000
A4 = 1.1245e-05, A6 = 5.6368e-08, A8 = -3.4377e-10
Zoom data
Infinite close (0.35m)
Wide angle Medium telephoto Wide angle Medium telephoto focal length 12.249 21.897 39.081 12.099 21.376 37.934
Fno. 2.88 2.88 2.88 2.85 2.81 2.81
Angle of view 2ω 85.27 52.86 30.85 85.00 52.55 31.13
fb (in air) 16.194 17.958 16.192 15.412 18.267 18.067
Total length (in air) 140.24 122.13 131.16 140.25 122.13 131.15
d6 19.9477 10.1451 3.8548 19.9477 10.1451 3.8548
d9 30.1701 8.9967 1.5000 30.1701 8.9967 1.5000
d20 1.5000 5.8558 11.7363 2.8888 7.4894 14.7738
d23 2.1027 8.8471 27.5524 1.5007 6.8993 22.6235
d25 12.7560 14.5200 12.7543 11.9744 14.8288 14.6290
Group focal length
f1 = -24.82 f2 = 236.25 f3 = 30.26 f4 = -41.47 f5 = 49.32
数値実施例2
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 58.6864 3.000 1.80610 40.92
2 17.0000 12.928
3 -53.5699 2.200 1.48749 70.23
4 30.5832 0.911
5 33.7368 3.537 1.92286 18.90
6 74.6324 可変
7 38.2052 3.585 1.74950 35.28
8 -205.1167 2.914
9 -68.7869 2.125 1.83481 42.71
10 -35.0421 1.400 2.00069 25.46
11 -293.5777 可変
12 32.3812 4.371 1.58313 59.38
13 -892.4044 1.400
14 絞り 3.166
15 33.8195 4.800 1.49700 81.54
16 -124.5967 0.243
17 654.4080 4.261 1.49700 81.54
18 -29.2764 0.150
19 -28.1624 1.400 1.73800 32.26
20 27.3034 2.628
21 45.5795 4.138 1.80610 40.92
22 -42.0061 可変
23 68.9760 1.200 1.84666 23.78
24 15.8735 0.150
25 15.8965 2.304 1.92286 18.90
26 36.3624 1.200 1.90366 31.32
27 20.5290 可変
28 48.0701 4.484 1.49700 81.54
29 -48.2908 可変
30 ∞ 4.000 1.51633 64.14
31 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=-0.3761
第2面
k=-0.7340
A4=4.9746e-06,A6=6.0663e-09
第12面
k=0.000
A4=-7.1874e-06,A6=-3.9355e-09,A8=1.6496e-11
第21面
k=0.000
A4=-1.2967e-05,A6=1.1846e-08,A8=5.0416e-11
第22面
k=0.000
A4=-2.8376e-06,A6=1.0849e-09,A8=3.7505e-11
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.247 21.900 39.094 12.091 21.402 38.667
Fno. 2.88 2.88 2.88 2.84 2.82 2.86
画角2ω 85.28 52.66 30.86 85.09 52.34 30.64
fb (in air) 16.198 18.483 17.260 15.611 18.393 17.750
全長 (in air) 140.24 120.10 130.36 140.25 120.09 130.34
d6 24.7170 8.1251 1.5000 24.7170 8.1251 1.5000
d11 25.6827 8.4326 1.5000 25.6827 8.4326 1.5000
d21 1.5000 6.6593 12.5996 2.6399 8.3695 15.8123
d27 2.2897 8.5423 27.6386 1.7387 6.9160 23.9180
d29 12.7595 15.0448 13.8225 12.1731 14.9552 14.3125
群焦点距離
f1=-21.55 f2=90.00 f3=30.23 f4=-38.81 f5=49.23
Numerical example 2
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 58.6864 3.000 1.80610 40.92
2 17.0000 12.928
3 -53.5699 2.200 1.48749 70.23
4 30.5832 0.911
5 33.7368 3.537 1.92286 18.90
6 74.6324 Variable
7 38.2052 3.585 1.74950 35.28
8 -205.1167 2.914
9 -68.7869 2.125 1.83481 42.71
10 -35.0421 1.400 2.00069 25.46
11 -293.5777 Variable
12 32.3812 4.371 1.58313 59.38
13 -892.4044 1.400
14 Aperture 3.166
15 33.8195 4.800 1.49700 81.54
16 -124.5967 0.243
17 654.4080 4.261 1.49700 81.54
18 -29.2764 0.150
19 -28.1624 1.400 1.73800 32.26
20 27.3034 2.628
21 45.5795 4.138 1.80610 40.92
22 -42.0061 Variable
23 68.9760 1.200 1.84666 23.78
24 15.8735 0.150
25 15.8965 2.304 1.92286 18.90
26 36.3624 1.200 1.90366 31.32
27 20.5290 Variable
28 48.0701 4.484 1.49700 81.54
29 -48.2908 Variable
30 ∞ 4.000 1.51633 64.14
31 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = -0.3761
Second side
k = -0.7340
A4 = 4.9746e-06, A6 = 6.0663e-09
12th page
k = 0.000
A4 = -7.1874e-06, A6 = -3.9355e-09, A8 = 1.6496e-11
21st page
k = 0.000
A4 = -1.2967e-05, A6 = 1.1846e-08, A8 = 5.0416e-11
22nd page
k = 0.000
A4 = -2.8376e-06, A6 = 1.0849e-09, A8 = 3.7505e-11
Zoom data
Infinite close (0.35m)
Wide angle Medium telephoto Wide angle Medium telephoto focal length 12.247 21.900 39.094 12.091 21.402 38.667
Fno. 2.88 2.88 2.88 2.84 2.82 2.86
Angle of view 2ω 85.28 52.66 30.86 85.09 52.34 30.64
fb (in air) 16.198 18.483 17.260 15.611 18.393 17.750
Total length (in air) 140.24 120.10 130.36 140.25 120.09 130.34
d6 24.7170 8.1251 1.5000 24.7170 8.1251 1.5000
d11 25.6827 8.4326 1.5000 25.6827 8.4326 1.5000
d21 1.5000 6.6593 12.5996 2.6399 8.3695 15.8123
d27 2.2897 8.5423 27.6386 1.7387 6.9160 23.9180
d29 12.7595 15.0448 13.8225 12.1731 14.9552 14.3125
Group focal length
f1 = -21.55 f2 = 90.00 f3 = 30.23 f4 = -38.81 f5 = 49.23
数値実施例3
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 67.7643 3.000 1.80610 40.92
2 17.0000 11.658
3 -142.3447 2.200 1.48749 70.23
4 27.5273 0.469
5 29.6830 4.158 1.92286 18.90
6 66.1737 可変
7 29.7146 3.509 1.90366 31.32
8 ∞ 2.318
9 -48.6663 2.180 1.69895 30.13
10 -32.9305 0.983
11 -34.2197 1.400 1.92286 18.90
12 260.9474 可変
13 絞り 1.000
14 -2252.2025 2.770 1.58313 59.38
15 -40.1104 1.255
16 -99.7019 4.638 2.00069 25.46
17 -19.6495 1.400 1.73800 32.26
18 54.3929 0.150
19 22.1463 7.939 1.49700 81.54
20 -33.6050 0.679
21 -32.8795 1.400 1.73800 32.26
22 31.8903 0.150
23 23.3029 6.102 1.49700 81.54
24 -37.3171 0.150
25 74.4593 1.912 1.80610 40.92
26 -476.0275 可変
27 77.9333 1.000 1.80100 34.97
28 13.9062 2.792 1.92286 18.90
29 20.1990 可変
30 44.1302 3.306 1.49700 81.54
31 -168.3136 可変
32 ∞ 4.000 1.51633 64.14
33 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=-0.8522
A4=-3.1726e-06,A6=2.0546e-09
第2面
k=-0.5472
A4=-6.7600e-06,A6=-1.3873e-08
第14面
k=0.000
A4=-6.3467e-06,A6=6.3592e-08,A8=-3.2912e-11
第15面
k=0.000
A4=1.6865e-05,A6=6.4131e-08
第25面
k=0.000
A4=-1.2756e-05,A6=-3.9311e-08,A8=-1.5242e-10
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.254 21.906 39.081 12.036 21.441 38.807
Fno. 2.88 2.88 2.88 2.83 2.82 2.73
画角2ω 85.03 53.10 31.07 85.30 52.93 31.45
fb (in air) 17.815 21.455 27.288 15.729 21.378 32.808
全長 (in air) 142.12 130.67 133.80 142.12 130.66 133.78
d6 37.7235 15.2913 1.5239 37.7235 15.2913 1.5239
d12 13.7027 7.5842 1.5000 13.7027 7.5842 1.5000
d26 1.5000 1.5000 5.9784 3.1924 2.6702 7.0227
d29 1.5004 14.9595 27.6290 1.8946 13.8573 21.0437
d31 14.3772 18.0170 23.8499 12.2907 17.9401 29.3703
群焦点距離
f1=-24.88 f2=90.20 f3=27.18 f4=-39.72 f5=70.71
Numerical Example 3
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 67.7643 3.000 1.80610 40.92
2 17.0000 11.658
3 -142.3447 2.200 1.48749 70.23
4 27.5273 0.469
5 29.6830 4.158 1.92286 18.90
6 66.1737 Variable
7 29.7146 3.509 1.90366 31.32
8 ∞ 2.318
9 -48.6663 2.180 1.69895 30.13
10 -32.9305 0.983
11 -34.2197 1.400 1.92286 18.90
12 260.9474 Variable
13 Aperture 1.000
14 -2252.2025 2.770 1.58313 59.38
15 -40.1104 1.255
16 -99.7019 4.638 2.00069 25.46
17 -19.6495 1.400 1.73800 32.26
18 54.3929 0.150
19 22.1463 7.939 1.49700 81.54
20 -33.6050 0.679
21 -32.8795 1.400 1.73800 32.26
22 31.8903 0.150
23 23.3029 6.102 1.49700 81.54
24 -37.3171 0.150
25 74.4593 1.912 1.80610 40.92
26 -476.0275 Variable
27 77.9333 1.000 1.80100 34.97
28 13.9062 2.792 1.92286 18.90
29 20.1990 Variable
30 44.1302 3.306 1.49700 81.54
31 -168.3136 Variable
32 ∞ 4.000 1.51633 64.14
33 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = -0.8522
A4 = -3.1726e-06, A6 = 2.0546e-09
Second side
k = -0.5472
A4 = -6.7600e-06, A6 = -1.3873e-08
14th page
k = 0.000
A4 = -6.3467e-06, A6 = 6.3592e-08, A8 = -3.2912e-11
15th page
k = 0.000
A4 = 1.6865e-05, A6 = 6.4131e-08
25th page
k = 0.000
A4 = -1.2756e-05, A6 = -3.9311e-08, A8 = -1.5242e-10
Zoom data
Infinite close (0.35m)
Wide-angle medium telephoto Wide-angle medium telephoto focal length 12.254 21.906 39.081 12.036 21.441 38.807
Fno. 2.88 2.88 2.88 2.83 2.82 2.73
Angle of view 2ω 85.03 53.10 31.07 85.30 52.93 31.45
fb (in air) 17.815 21.455 27.288 15.729 21.378 32.808
Total length (in air) 142.12 130.67 133.80 142.12 130.66 133.78
d6 37.7235 15.2913 1.5239 37.7235 15.2913 1.5239
d12 13.7027 7.5842 1.5000 13.7027 7.5842 1.5000
d26 1.5000 1.5000 5.9784 3.1924 2.6702 7.0227
d29 1.5004 14.9595 27.6290 1.8946 13.8573 21.0437
d31 14.3772 18.0170 23.8499 12.2907 17.9401 29.3703
Group focal length
f1 = -24.88 f2 = 90.20 f3 = 27.18 f4 = -39.72 f5 = 70.71
数値実施例4
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 58.4109 2.800 1.80610 40.92
2 17.0000 10.206
3 -160.4354 2.200 1.48749 70.23
4 21.1892 1.254
5 24.6183 3.632 1.92286 18.90
6 43.0512 可変
7 61.1906 2.942 1.91082 35.25
8 -45.4911 0.129
9 123.1405 2.050 1.80610 40.92
10 -147.7205 1.308
11 -24.3545 1.400 1.84666 23.78
12 98.8743 可変
13 絞り 1.000
14 22.1107 3.431 1.73800 32.26
15 -181.1094 8.191
16 -27.1087 1.400 1.73800 32.26
17 20.6824 0.150
18 14.7546 5.258 1.49700 81.54
19 -28.3256 0.230
20 -79.3784 1.400 1.73800 32.26
21 14.6593 5.249 1.49700 81.54
22 -49.1074 0.150
23 31.6813 3.771 1.84666 23.78
24 -68.2643 可変
25 147.3516 1.000 1.80100 34.97
26 21.9645 1.737 1.92286 18.90
27 24.3573 可変
28 50.8870 3.100 1.49700 81.54
29 -168.7052 可変
30 ∞ 4.000 1.51633 64.14
31 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=-0.84139
A4=-4.6892e-07,A6=1.5690e-09
第2面
k=-1.1355
A4=7.0194e-06,A6=3.4468e-09
第9面
k=0.000
A4=-3.8230e-05,A6=-1.7225e-08
第10面
k=0.000
A4=-6.1134e-05,A6=-7.5117e-09
第18面
k=0.000
A4=-7.2692e-05,A6=1.3298e-07,A8=-1.3504e-9
第19面
k=0.000
A4=6.8253e-06,A6=2.0571e-08,A8=-8.1083e-10
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.247 21.901 39.100 11.920 21.042 35.085
Fno. 2.88 3.43 4.08 2.80 3.30 3.68
画角2ω 88.03 53.51 31.11 88.87 53.90 32.27
fb (in air) 18.407 22.243 27.202 16.195 21.508 37.165
全長 (in air) 136.25 124.83 133.86 136.24 124.81 133.80
d6 34.7285 12.9368 2.7296 34.7285 12.9368 2.7296
d12 14.4019 8.2014 1.5654 14.4019 8.2014 1.5654
d24 1.5000 3.3928 7.6824 3.3206 5.3284 9.1662
d27 1.8579 12.7049 29.3307 2.2457 11.4879 17.8281
d29 14.9694 18.8047 23.7637 12.7570 18.0705 33.7275
群焦点距離
f1=-22.09 f2=118.52 f3=27.85 f4=-37.83 f5=79.03
Numerical Example 4
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 58.4109 2.800 1.80610 40.92
2 17.0000 10.206
3 -160.4354 2.200 1.48749 70.23
4 21.1892 1.254
5 24.6183 3.632 1.92286 18.90
6 43.0512 Variable
7 61.1906 2.942 1.91082 35.25
8 -45.4911 0.129
9 123.1405 2.050 1.80610 40.92
10 -147.7205 1.308
11 -24.3545 1.400 1.84666 23.78
12 98.8743 Variable
13 Aperture 1.000
14 22.1107 3.431 1.73800 32.26
15 -181.1094 8.191
16 -27.1087 1.400 1.73800 32.26
17 20.6824 0.150
18 14.7546 5.258 1.49700 81.54
19 -28.3256 0.230
20 -79.3784 1.400 1.73800 32.26
21 14.6593 5.249 1.49700 81.54
22 -49.1074 0.150
23 31.6813 3.771 1.84666 23.78
24 -68.2643 Variable
25 147.3516 1.000 1.80 100 34.97
26 21.9645 1.737 1.92286 18.90
27 24.3573 Variable
28 50.8870 3.100 1.49700 81.54
29 -168.7052 Variable
30 ∞ 4.000 1.51633 64.14
31 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = -0.84139
A4 = -4.6892e-07, A6 = 1.5690e-09
Second side
k = -1.1355
A4 = 7.0194e-06, A6 = 3.4468e-09
9th page
k = 0.000
A4 = -3.8230e-05, A6 = -1.7225e-08
10th page
k = 0.000
A4 = -6.1134e-05, A6 = -7.5117e-09
18th page
k = 0.000
A4 = -7.2692e-05, A6 = 1.3298e-07, A8 = -1.3504e-9
19th page
k = 0.000
A4 = 6.8253e-06, A6 = 2.0571e-08, A8 = -8.1083e-10
Zoom data
Infinite close (0.35m)
Wide-angle medium telephoto Wide-angle medium telephoto focal length 12.247 21.901 39.100 11.920 21.042 35.085
Fno. 2.88 3.43 4.08 2.80 3.30 3.68
Angle of view 2ω 88.03 53.51 31.11 88.87 53.90 32.27
fb (in air) 18.407 22.243 27.202 16.195 21.508 37.165
Total length (in air) 136.25 124.83 133.86 136.24 124.81 133.80
d6 34.7285 12.9368 2.7296 34.7285 12.9368 2.7296
d12 14.4019 8.2014 1.5654 14.4019 8.2014 1.5654
d24 1.5000 3.3928 7.6824 3.3206 5.3284 9.1662
d27 1.8579 12.7049 29.3307 2.2457 11.4879 17.8281
d29 14.9694 18.8047 23.7637 12.7570 18.0705 33.7275
Group focal length
f1 = -22.09 f2 = 118.52 f3 = 27.85 f4 = -37.83 f5 = 79.03
数値実施例5
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 59.2511 2.800 1.80610 40.92
2 17.0000 10.160
3 -166.9221 2.200 1.49700 81.54
4 19.7605 1.121
5 22.2066 4.071 1.92286 18.90
6 36.5231 可変
7 29.3176 3.525 1.80610 40.92
8 -43.7345 0.936
9 -25.0486 1.400 1.84666 23.78
10 188.0285 可変
11 27.2231 3.140 1.69895 30.13
12 -104.7519 2.423
13 絞り 7.156
14 -10.8543 1.400 1.85026 32.27
15 31.1030 0.570
16 20.3235 5.175 1.49700 81.54
17 -21.5394 0.542
18 106.3960 5.434 1.48749 70.23
19 -13.7926 1.400 1.84666 23.78
20 -23.1247 0.150
21 92.0391 2.323 1.92286 18.90
22 -121.7447 可変
23 152.8084 2.180 1.92286 18.90
24 -66.7215 1.200 1.80100 34.97
25 22.6220 可変
26 62.3376 2.757 1.49700 81.54
27 -131.9179 可変
28 ∞ 4.000 1.51633 64.14
29 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=2.1507
A4=-3.8746e-06,A6=4.6466e-10
第2面
k=-1.207
A4=1.3779e-05,A6=2.7514e-09
第7面
k=0.000
A4=-6.9856e-06,A6=-7.5428e-09
第8面
k=0.000
A4=-2.0993e-05,A6=-1.2872e-08
第16面
k=0.000
A4=-8.9591e-05,A6=2.8322e-07,A8=-5.0305e-10
第17面
k=0.000
A4=1.1202e-05,A6=-8.6926e-08,A8=-1.0239e-10
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.248 21.889 39.095 11.921 20.931 35.073
Fno. 2.88 3.43 4.08 2.80 3.28 3.67
画角2ω 88.07 53.52 30.99 88.68 53.69 31.51
fb (in air) 17.703 24.791 27.187 16.191 25.425 34.671
全長 (in air) 131.37 121.47 129.15 131.36 121.45 129.10
d6 35.5746 13.9821 2.2917 35.5746 13.9821 2.2917
d10 10.9997 6.2346 1.5000 10.9997 6.2346 1.5000
d22 1.5000 2.7240 8.4683 2.9266 4.1577 10.5251
d25 2.1666 10.3095 26.2793 2.2430 8.2264 16.6857
d27 14.2649 21.3526 23.7488 12.7528 21.9875 31.2330
群焦点距離
f1=-20.78 f2=96.62 f3=28.20 f4=-36.86 f5=85.58
Numerical Example 5
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 59.2511 2.800 1.80610 40.92
2 17.0000 10.160
3 -166.9221 2.200 1.49700 81.54
4 19.7605 1.121
5 22.2066 4.071 1.92286 18.90
6 36.5231 Variable
7 29.3176 3.525 1.80610 40.92
8 -43.7345 0.936
9 -25.0486 1.400 1.84666 23.78
10 188.0285 Variable
11 27.2231 3.140 1.69895 30.13
12 -104.7519 2.423
13 Aperture 7.156
14 -10.8543 1.400 1.85026 32.27
15 31.1030 0.570
16 20.3235 5.175 1.49700 81.54
17 -21.5394 0.542
18 106.3960 5.434 1.48749 70.23
19 -13.7926 1.400 1.84666 23.78
20 -23.1247 0.150
21 92.0391 2.323 1.92286 18.90
22 -121.7447 Variable
23 152.8084 2.180 1.92286 18.90
24 -66.7215 1.200 1.80100 34.97
25 22.6220 Variable
26 62.3376 2.757 1.49700 81.54
27 -131.9179 Variable
28 ∞ 4.000 1.51633 64.14
29 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = 2.1507
A4 = -3.8746e-06, A6 = 4.6466e-10
Second side
k = -1.207
A4 = 1.3779e-05, A6 = 2.7514e-09
7th page
k = 0.000
A4 = -6.9856e-06, A6 = -7.5428e-09
8th page
k = 0.000
A4 = -2.0993e-05, A6 = -1.2872e-08
16th page
k = 0.000
A4 = -8.9591e-05, A6 = 2.8322e-07, A8 = -5.0305e-10
17th page
k = 0.000
A4 = 1.1202e-05, A6 = -8.6926e-08, A8 = -1.0239e-10
Zoom data
Infinite close (0.35m)
Wide angle Medium telephoto Wide angle Medium telephoto focal length 12.248 21.889 39.095 11.921 20.931 35.073
Fno. 2.88 3.43 4.08 2.80 3.28 3.67
Angle of view 2ω 88.07 53.52 30.99 88.68 53.69 31.51
fb (in air) 17.703 24.791 27.187 16.191 25.425 34.671
Total length (in air) 131.37 121.47 129.15 131.36 121.45 129.10
d6 35.5746 13.9821 2.2917 35.5746 13.9821 2.2917
d10 10.9997 6.2346 1.5000 10.9997 6.2346 1.5000
d22 1.5000 2.7240 8.4683 2.9266 4.1577 10.5251
d25 2.1666 10.3095 26.2793 2.2430 8.2264 16.6857
d27 14.2649 21.3526 23.7488 12.7528 21.9875 31.2330
Group focal length
f1 = -20.78 f2 = 96.62 f3 = 28.20 f4 = -36.86 f5 = 85.58
数値実施例6
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 56.6711 2.500 1.80610 40.92
2 17.3278 9.343
3 -277.8772 1.900 1.49700 81.54
4 19.3191 1.299
5 22.0080 4.500 1.92286 18.90
6 34.4821 可変
7 30.2005 3.683 1.80610 40.92
8 -45.9959 1.261
9 -24.6774 1.200 1.84666 23.78
10 1424.9733 可変
11 22.4770 3.257 1.63980 34.46
12 -88.8786 2.015
13 絞り 6.946
14 -14.9389 1.200 1.84666 23.78
15 44.6455 0.578
16 23.2441 5.452 1.49700 81.54
17 -13.4497 1.094
18 58.3671 2.215 1.92286 18.90
19 -185.5916 可変
20 267.3182 1.917 1.92286 18.90
21 -95.8833 1.200 1.80100 34.97
22 25.9515 可変
23 121.9942 3.072 1.49700 81.54
24 -45.9952 可変
25 ∞ 4.000 1.51633 64.14
26 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=2.1038
A4=-9.0119e-06,A6=1.6932e-09
第2面
k=-1.9168
A4=2.2431e-05,A6=-3.7899e-08
第7面
k=0.000
A4=-2.2829e-06,A6=-9.7571e-09
第8面
k=0.000
A4=-1.4527e-05,A6=-2.8093e-08
第16面
k=0.000
A4=-1.0252e-04,A6=4.0780e-07,A8=-1.1777e-09
第17面
k=0.000
A4=1.3721e-05,A6=1.7499e-08,A8=1.2935e-10
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.248 21.902 39.090 11.964 21.030 36.607
Fno. 4.08 4.08 4.08 3.98 3.92 3.83
画角2ω 88.49 53.14 30.86 88.67 52.84 30.25
fb (in air) 16.203 24.240 27.195 16.203 24.240 27.195
全長 (in air) 123.24 109.26 117.35 123.24 109.26 117.35
d6 32.1018 10.4781 1.5000 32.1018 10.4781 1.5000
d10 14.5313 7.8072 1.5000 14.5313 7.8072 1.5000
d19 1.5000 3.2833 8.7629 2.5000 5.2113 13.2608
d22 2.9134 7.4567 22.4013 1.9134 5.5287 17.9034
d24 12.7650 20.8022 23.7571 12.7650 20.8022 23.7571
群焦点距離
f1=-20.78 f2=67.83 f3=24.14 f4=-26.67 f5=54.58
Numerical Example 6
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 56.6711 2.500 1.80610 40.92
2 17.3278 9.343
3 -277.8772 1.900 1.49700 81.54
4 19.3191 1.299
5 22.0080 4.500 1.92286 18.90
6 34.4821 Variable
7 30.2005 3.683 1.80610 40.92
8 -45.9959 1.261
9 -24.6774 1.200 1.84666 23.78
10 1424.9733 Variable
11 22.4770 3.257 1.63980 34.46
12 -88.8786 2.015
13 Aperture 6.946
14 -14.9389 1.200 1.84666 23.78
15 44.6455 0.578
16 23.2441 5.452 1.49700 81.54
17 -13.4497 1.094
18 58.3671 2.215 1.92286 18.90
19 -185.5916 Variable
20 267.3182 1.917 1.92286 18.90
21 -95.8833 1.200 1.80100 34.97
22 25.9515 Variable
23 121.9942 3.072 1.49700 81.54
24 -45.9952 variable
25 ∞ 4.000 1.51633 64.14
26 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = 2.1038
A4 = -9.0119e-06, A6 = 1.6932e-09
Second side
k = -1.9168
A4 = 2.2431e-05, A6 = -3.7899e-08
7th page
k = 0.000
A4 = -2.2829e-06, A6 = -9.7571e-09
8th page
k = 0.000
A4 = -1.4527e-05, A6 = -2.8093e-08
16th page
k = 0.000
A4 = -1.0252e-04, A6 = 4.0780e-07, A8 = -1.1777e-09
17th page
k = 0.000
A4 = 1.3721e-05, A6 = 1.7499e-08, A8 = 1.2935e-10
Zoom data
Infinite close (0.35m)
Wide angle Medium telephoto Wide angle Medium telephoto focal length 12.248 21.902 39.090 11.964 21.030 36.607
Fno. 4.08 4.08 4.08 3.98 3.92 3.83
Angle of view 2ω 88.49 53.14 30.86 88.67 52.84 30.25
fb (in air) 16.203 24.240 27.195 16.203 24.240 27.195
Total length (in air) 123.24 109.26 117.35 123.24 109.26 117.35
d6 32.1018 10.4781 1.5000 32.1018 10.4781 1.5000
d10 14.5313 7.8072 1.5000 14.5313 7.8072 1.5000
d19 1.5000 3.2833 8.7629 2.5000 5.2113 13.2608
d22 2.9134 7.4567 22.4013 1.9134 5.5287 17.9034
d24 12.7650 20.8022 23.7571 12.7650 20.8022 23.7571
Group focal length
f1 = -20.78 f2 = 67.83 f3 = 24.14 f4 = -26.67 f5 = 54.58
数値実施例7
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 57.1845 2.500 1.80610 40.92
2 17.0000 7.512
3 98.7145 1.900 1.49700 81.54
4 18.9752 1.625
5 22.0319 3.430 1.92286 18.90
6 28.6857 可変
7 29.1976 3.455 1.80610 40.92
8 -68.8613 2.224
9 -24.1742 1.200 1.84666 23.78
10 -99.4181 可変
11 18.1851 2.956 1.72047 34.71
12 203.8700 1.379
13 絞り 4.981
14 -19.8048 1.200 1.84666 23.78
15 28.4287 0.782
16 21.3219 7.715 1.49700 81.54
17 -16.4664 0.150
18 86.9990 2.276 1.92286 18.90
19 -62.4918 可変
20 -42.4512 1.200 1.90366 31.32
21 81.2085 可変
22 59.0047 3.149 1.49700 81.54
23 -68.2113 可変
24 ∞ 4.000 1.51633 64.14
25 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=-13.5888
A4=-2.2579e-06,A6=-7.7764e-10
第2面
k=-2.0180
A4=2.1964e-05,A6=-4.8961e-08
第7面
k=0.000
A4=6.0468e-06,A6=-4.7379e-09
第8面
k=0.000
A4=-9.6098e-06,A6=-4.5475e-08
第16面
k=0.000
A4=-9.4349e-05,A6=3.9149e-07,A8=8.1740e-10
第17面
k=0.000
A4=1.2917e-05,A6=7.5270e-09,A8=1.4648e-09
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.256 21.898 38.889 12.094 21.378 36.495
Fno. 4.08 4.08 4.08 4.03 3.98 3.84
画角2ω 88.29 53.83 31.48 88.35 53.43 31.72
fb (in air) 17.036 25.497 27.963 18.235 28.164 35.665
全長 (in air) 121.08 103.53 111.33 121.08 103.53 111.33
d6 36.7060 10.9677 1.5000 36.7060 10.9677 1.5000
d10 12.3862 7.7477 1.5000 12.3862 7.7477 1.5000
d19 1.5000 4.0313 8.1710 1.5000 4.0313 8.1710
d21 2.4559 4.2874 21.1968 1.2566 1.6202 13.4948
d23 13.5982 22.0587 24.5249 14.7975 24.7259 32.2269
群焦点距離
f1=-21.38 f2=82.18 f3=27.05 f4=-38.55 f5=67.62
Numerical Example 7
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 57.1845 2.500 1.80610 40.92
2 17.0000 7.512
3 98.7145 1.900 1.49700 81.54
4 18.9752 1.625
5 22.0319 3.430 1.92286 18.90
6 28.6857 Variable
7 29.1976 3.455 1.80610 40.92
8 -68.8613 2.224
9 -24.1742 1.200 1.84666 23.78
10 -99.4181 Variable
11 18.1851 2.956 1.72047 34.71
12 203.8700 1.379
13 Aperture 4.981
14 -19.8048 1.200 1.84666 23.78
15 28.4287 0.782
16 21.3219 7.715 1.49700 81.54
17 -16.4664 0.150
18 86.9990 2.276 1.92286 18.90
19 -62.4918 Variable
20 -42.4512 1.200 1.90366 31.32
21 81.2085 Variable
22 59.0047 3.149 1.49700 81.54
23 -68.2113 Variable
24 ∞ 4.000 1.51633 64.14
25 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = -13.5888
A4 = -2.2579e-06, A6 = -7.7764e-10
Second side
k = -2.0180
A4 = 2.1964e-05, A6 = -4.8961e-08
7th page
k = 0.000
A4 = 6.0468e-06, A6 = -4.7379e-09
8th page
k = 0.000
A4 = -9.6098e-06, A6 = -4.5475e-08
16th page
k = 0.000
A4 = -9.4349e-05, A6 = 3.9149e-07, A8 = 8.1740e-10
17th page
k = 0.000
A4 = 1.2917e-05, A6 = 7.5270e-09, A8 = 1.4648e-09
Zoom data
Infinite close (0.35m)
Wide angle Medium telephoto Wide angle Medium telephoto focal length 12.256 21.898 38.889 12.094 21.378 36.495
Fno. 4.08 4.08 4.08 4.03 3.98 3.84
Angle of view 2ω 88.29 53.83 31.48 88.35 53.43 31.72
fb (in air) 17.036 25.497 27.963 18.235 28.164 35.665
Total length (in air) 121.08 103.53 111.33 121.08 103.53 111.33
d6 36.7060 10.9677 1.5000 36.7060 10.9677 1.5000
d10 12.3862 7.7477 1.5000 12.3862 7.7477 1.5000
d19 1.5000 4.0313 8.1710 1.5000 4.0313 8.1710
d21 2.4559 4.2874 21.1968 1.2566 1.6202 13.4948
d23 13.5982 22.0587 24.5249 14.7975 24.7259 32.2269
Group focal length
f1 = -21.38 f2 = 82.18 f3 = 27.05 f4 = -38.55 f5 = 67.62
数値実施例8
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 238.3687 2.500 1.49700 81.54
2 17.0000 6.686
3 55.4095 1.900 1.49700 81.54
4 17.8967 4.485
5 20.3736 2.394 1.92286 18.90
6 21.2401 可変
7 25.6638 4.500 1.80610 40.92
8 -156.8626 1.194
9 58.1263 1.200 1.90366 31.32
10 21.6003 可変
11 19.6679 3.228 1.58313 59.38
12 178.3194 2.300
13 絞り 5.649
14 -33.0621 5.750 1.84666 23.78
15 34.1402 0.303
16 20.1759 5.198 1.49700 81.54
17 -22.7848 1.977
18 86.1732 1.200 1.90366 31.32
19 31.2422 2.746 1.92286 18.90
20 -382.6973 可変
21 -15.2506 1.200 1.90366 31.32
22 -23.6533 可変
23 235.8744 3.009 1.49700 81.54
24 -40.2987 可変
25 ∞ 4.000 1.51633 64.14
26 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=-89.6751
A4=-2.8283e-07,A6=2.8425e-11
第2面
k=-1.9991
A4=2.2900e-05,A6=-4.0502e-08
第7面
k=0.000
A4=-9.6367e-06
第11面
k=0.000
A4=9.6694e-06
第16面
k=0.000
A4=-3.4185e-05,A6=3.7690e-08,A8=5.4702e-11
第17面
k=0.000
A4=8.4285e-06,A6=5.6158e-08,A8=3.9066e-10
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.247 21.896 39.061 11.879 21.058 37.063
Fno. 4.08 4.08 4.08 4.03 3.97 3.89
画角2ω 87.88 53.63 31.19 88.29 54.21 31.39
fb (in air) 16.198 24.994 27.198 16.198 24.994 27.198
全長 (in air) 127.30 116.58 128.24 127.30 116.58 128.24
d6 43.2791 15.2943 1.9104 45.1548 17.5440 5.0679
d10 4.6178 7.5710 6.7254 2.7422 5.3213 3.5679
d20 2.9282 7.9775 18.9472 2.9282 7.9775 18.9472
d22 1.5000 1.9602 14.6813 1.5000 1.9602 14.6813
d24 12.7596 21.5562 23.7603 12.7596 21.5562 23.7603
群焦点距離
f1=-21.67 f2=63.20 f3=24.86 f4=-30.71 f5=64.18
Numerical Example 8
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 238.3687 2.500 1.49700 81.54
2 17.0000 6.686
3 55.4095 1.900 1.49700 81.54
4 17.8967 4.485
5 20.3736 2.394 1.92286 18.90
6 21.2401 Variable
7 25.6638 4.500 1.80610 40.92
8 -156.8626 1.194
9 58.1263 1.200 1.90366 31.32
10 21.6003 Variable
11 19.6679 3.228 1.58313 59.38
12 178.3194 2.300
13 Aperture 5.649
14 -33.0621 5.750 1.84666 23.78
15 34.1402 0.303
16 20.1759 5.198 1.49700 81.54
17 -22.7848 1.977
18 86.1732 1.200 1.90366 31.32
19 31.2422 2.746 1.92286 18.90
20 -382.6973 variable
21 -15.2506 1.200 1.90366 31.32
22 -23.6533 Variable
23 235.8744 3.009 1.49700 81.54
24 -40.2987 Variable
25 ∞ 4.000 1.51633 64.14
26 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = -89.6751
A4 = -2.8283e-07, A6 = 2.8425e-11
Second side
k = -1.9991
A4 = 2.2900e-05, A6 = -4.0502e-08
7th page
k = 0.000
A4 = -9.6367e-06
11th page
k = 0.000
A4 = 9.6694e-06
16th page
k = 0.000
A4 = -3.4185e-05, A6 = 3.7690e-08, A8 = 5.4702e-11
17th page
k = 0.000
A4 = 8.4285e-06, A6 = 5.6158e-08, A8 = 3.9066e-10
Zoom data
Infinite close (0.35m)
Wide angle Medium telephoto Wide angle Medium telephoto focal length 12.247 21.896 39.061 11.879 21.058 37.063
Fno. 4.08 4.08 4.08 4.03 3.97 3.89
Angle of view 2ω 87.88 53.63 31.19 88.29 54.21 31.39
fb (in air) 16.198 24.994 27.198 16.198 24.994 27.198
Total length (in air) 127.30 116.58 128.24 127.30 116.58 128.24
d6 43.2791 15.2943 1.9104 45.1548 17.5440 5.0679
d10 4.6178 7.5710 6.7254 2.7422 5.3213 3.5679
d20 2.9282 7.9775 18.9472 2.9282 7.9775 18.9472
d22 1.5000 1.9602 14.6813 1.5000 1.9602 14.6813
d24 12.7596 21.5562 23.7603 12.7596 21.5562 23.7603
Group focal length
f1 = -21.67 f2 = 63.20 f3 = 24.86 f4 = -30.71 f5 = 64.18
数値実施例9
単位 mm
面データ
面番号 r d nd νd
物面 ∞ ∞
1 77.1951 2.505 1.80610 40.92
2 17.0986 11.149
3 738.9914 1.915 1.49700 81.54
4 25.4262 0.157
5 24.7353 4.505 1.92286 18.90
6 44.0211 可変
7 70.2810 2.403 1.80610 40.92
8 -72.5862 1.049
9 -24.3202 1.207 1.84666 23.78
10 -54.0452 可変
11 25.3683 3.610 1.65412 39.68
12 -67.1935 1.022
13 絞り 7.394
14 -18.5524 1.214 1.84666 23.78
15 90.7835 0.784
16 40.3926 6.086 1.49700 81.54
17 -15.2301 0.744
18 59.0166 2.350 1.92286 18.90
19 153.5972 可変
20 102.6552 2.153 1.92286 18.90
21 -1050.9338 1.215 1.80100 34.97
22 34.6785 可変
23 115.2966 2.943 1.49700 81.54
24 -69.0895 可変
25 ∞ 4.000 1.51633 64.14
26 ∞ 0.800
像面(撮像面) ∞
非球面データ
第1面
k=-11.6770
A4=4.7923e-06,A6=-2.1507e-09
第2面
k=-0.4722
A4=1.1497e-06,A6=1.1275e-08
第7面
k=0.000
A4=-1.5791e-05,A6=-8.6919e-09
第8面
k=0.000
A4=-2.4951e-05,A6=-1.4463e-08
第16面
k=0.000
A4=-6.2066e-05,A6=9.6763e-08,A8=-6.2537e-11
第17面
k=0.000
A4=1.0914e-05,A6=-2.8994e-08,A8=6.9663e-11
ズームデータ
無限 至近(0.35m)
広角 中間 望遠 広角 中間 望遠
焦点距離 12.240 21.900 39.202 12.026 21.204 36.500
Fno. 2.88 3.43 4.08 2.83 3.32 3.81
画角2ω 87.81 54.02 31.04 87.66 53.55 30.54
fb (in air) 20.043 25.445 27.209 16.249 25.797 29.509
全長 (in air) 126.74 115.82 123.32 126.75 115.80 123.29
d6 31.6255 10.8841 1.7709 31.6255 10.8841 1.7709
d10 14.2941 8.5628 1.6090 14.2941 8.5628 1.6090
d19 2.1502 1.5465 8.0051 6.9043 4.9504 16.1674
d22 2.8593 13.6173 28.9603 1.9133 9.8413 18.4621
d24 16.6051 22.0074 23.7705 12.8111 22.3590 26.0714
群焦点距離
f1=-21.58 f2=69.62 f3=32.15 f4=-50.96 f5=69.50
Numerical Example 9
Unit mm
Surface data Surface number rd nd νd
Object ∞ ∞
1 77.1951 2.505 1.80610 40.92
2 17.0986 11.149
3 738.9914 1.915 1.49700 81.54
4 25.4262 0.157
5 24.7353 4.505 1.92286 18.90
6 44.0211 Variable
7 70.2810 2.403 1.80610 40.92
8 -72.5862 1.049
9 -24.3202 1.207 1.84666 23.78
10 -54.0452 variable
11 25.3683 3.610 1.65412 39.68
12 -67.1935 1.022
13 Aperture 7.394
14 -18.5524 1.214 1.84666 23.78
15 90.7835 0.784
16 40.3926 6.086 1.49700 81.54
17 -15.2301 0.744
18 59.0166 2.350 1.92286 18.90
19 153.5972 Variable
20 102.6552 2.153 1.92286 18.90
21 -1050.9338 1.215 1.80100 34.97
22 34.6785 Variable
23 115.2966 2.943 1.49700 81.54
24 -69.0895 Variable
25 ∞ 4.000 1.51633 64.14
26 ∞ 0.800
Image plane (imaging plane) ∞
Aspheric data first surface
k = -11.6770
A4 = 4.7923e-06, A6 = -2.1507e-09
Second side
k = -0.4722
A4 = 1.1497e-06, A6 = 1.1275e-08
7th page
k = 0.000
A4 = -1.5791e-05, A6 = -8.6919e-09
8th page
k = 0.000
A4 = -2.4951e-05, A6 = -1.4463e-08
16th page
k = 0.000
A4 = -6.2066e-05, A6 = 9.6763e-08, A8 = -6.2537e-11
17th page
k = 0.000
A4 = 1.0914e-05, A6 = -2.8994e-08, A8 = 6.9663e-11
Zoom data
Infinite close (0.35m)
Wide-angle medium telephoto Wide-angle medium telephoto focal length 12.240 21.900 39.202 12.026 21.204 36.500
Fno. 2.88 3.43 4.08 2.83 3.32 3.81
Angle of view 2ω 87.81 54.02 31.04 87.66 53.55 30.54
fb (in air) 20.043 25.445 27.209 16.249 25.797 29.509
Total length (in air) 126.74 115.82 123.32 126.75 115.80 123.29
d6 31.6255 10.8841 1.7709 31.6255 10.8841 1.7709
d10 14.2941 8.5628 1.6090 14.2941 8.5628 1.6090
d19 2.1502 1.5465 8.0051 6.9043 4.9504 16.1674
d22 2.8593 13.6173 28.9603 1.9133 9.8413 18.4621
d24 16.6051 22.0074 23.7705 12.8111 22.3590 26.0714
Group focal length
f1 = -21.58 f2 = 69.62 f3 = 32.15 f4 = -50.96 f5 = 69.50
以上の実施例1〜9の無限遠物点合焦時の収差図をそれぞれ図3、図7、図11、図15、図19、図23、図27、図31、図35に、至近(0.35m)物点合焦時の収差図をそれぞれ図4、図8、図12、図16、図20、図24、図28、図32、図36に
示す。これらの収差図において、(a)は広角端、(b)は中間焦点距離状態、(c)は望遠端における球面収差(SA)、非点収差(AS)、歪曲収差(DT)、倍率色収差(CC)を示す。各図中、”FIY”は最大像高を示す。
FIG. 3, FIG. 7, FIG. 11, FIG. 15, FIG. 19, FIG. 23, FIG. 27, FIG. 31, and FIG. Aberration diagrams at the time of focusing on an object point are shown in FIGS. 4, 8, 12, 16, 20, 20, 24, 28, 32, and 36, respectively. In these aberration diagrams, (a) is the wide-angle end, (b) is the intermediate focal length state, (c) is the spherical aberration (SA), astigmatism (AS), distortion (DT), and lateral chromatic aberration at the telephoto end. (CC) is shown. In each figure, “FIY” indicates the maximum image height.
次に、各実施例における条件式の値を掲げる。
実施例1 実施例2 実施例3 実施例4 実施例5
(1) β4t/β4w 1.35 1.41 1.72 1.69 1.67
(2) (d34t−d34w)/fw 0.84 0.91 0.37 0.51 0.57
(3) (d45t−d45w)/fw 2.08 2.07 2.13 2.24 1.97
(4) f2/fw 19.29 7.35 7.36 9.68 7.89
(5) ft/fw 3.19 3.19 3.19 3.19 3.19
(6) fbw/fw 1.32 1.32 1.45 1.50 1.45
(7) ν12 70.23 70.23 70.23 70.23 81.54
(8) |ν4p−ν4n| 12.42 12.42 16.07 16.07 16.07
(9) |f4/fw| 3.39 3.17 3.24 3.09 3.01
(10) △4w/△5w 1.78 1.94 0.81 0.82 0.94
Next, the values of the conditional expressions in each example are listed.
Example 1 Example 2 Example 3 Example 4 Example 5
(1) β 4t / β 4w 1.35 1.41 1.72 1.69 1.67
(2) (d 34t -d 34w ) / f w 0.84 0.91 0.37 0.51 0.57
(3) (d 45t −d 45w ) / f w 2.08 2.07 2.13 2.24 1.97
(4) f 2 / f w 19.29 7.35 7.36 9.68 7.89
(5) f t / f w 3.19 3.19 3.19 3.19 3.19
(6) f bw / f w 1.32 1.32 1.45 1.50 1.45
(7) ν 12 70.23 70.23 70.23 70.23 81.54
(8) | ν 4p −ν 4n | 12.42 12.42 16.07 16.07 16.07
(9) | f 4 / f w | 3.39 3.17 3.24 3.09 3.01
(10) △ 4w / △ 5w 1.78 1.94 0.81 0.82 0.94
実施例6 実施例7 実施例8 実施例9
(1) β4t/β4w 1.68 1.78 1.48 1.39
(2) (d34t−d34w)/fw 0.59 0.54 1.31 0.48
(3) (d45t−d45w)/fw 1.59 1.53 1.08 2.13
(4) f2/fw 6.71 5.16 5.69 19.86
(5) ft/fw 3.19 3.17 3.19 3.20
(6) fbw/fw 1.32 1.39 1.32 1.64
(7) ν12 81.54 81.54 81.54 81.54
(8) |ν4p−ν4n| 16.07 - - 16.07
(9) |f4/fw| 3.15 2.51 4.16 6.00
(10) △4w/△5w - - - 1.25
Example 6 Example 7 Example 8 Example 9
(1) β 4t / β 4w 1.68 1.78 1.48 1.39
(2) (d 34t -d 34w ) / f w 0.59 0.54 1.31 0.48
(3) (d 45t -d 45w ) / f w 1.59 1.53 1.08 2.13
(4) f 2 / f w 6.71 5.16 5.69 19.86
(5) f t / f w 3.19 3.17 3.19 3.20
(6) f bw / f w 1.32 1.39 1.32 1.64
(7) ν 12 81.54 81.54 81.54 81.54
(8) | ν 4p −ν 4n | 16.07--16.07
(9) | f 4 / f w | 3.15 2.51 4.16 6.00
(10) △ 4w / △ 5w--- 1.25
以上のように、本発明にかかるズームレンズは、標準ズームレンズにおいて、動画機能にも対応すべくウォブリング機能も考慮した場合に有用である。 As described above, the zoom lens according to the present invention is useful when the wobbling function is also considered in the standard zoom lens so as to correspond to the moving image function.
G1…第1レンズ群
G2…第2レンズ群
G3…第3レンズ群
G4…第4レンズ群
G5…第5レンズ群
S…明るさ絞り
C…カバーガラス
I…像面
G1 ... 1st lens group G2 ... 2nd lens group G3 ... 3rd lens group G4 ... 4th lens group G5 ... 5th lens group S ... Brightness stop C ... Cover glass I ... Image plane
Claims (12)
各群の間隔を変えて変倍を行うズームレンズにおいて、
広角端から望遠端への変倍に際し、
第1レンズ群と第2レンズ群の間隔は減少し、
第2レンズ群と第3レンズ群の間隔は変化し、
第3レンズ群と第4レンズ群の間隔は増大し、
第4レンズ群と第5レンズ群の間隔は増大する、
事を特徴とするズームレンズ。 In order from the object side, a first lens group with negative refractive power, a second lens group with positive refractive power, a third lens group with positive refractive power, a fourth lens group with negative refractive power, and a fifth lens group with positive refractive power. Have
In zoom lenses that change the magnification by changing the interval between each group,
When zooming from the wide-angle end to the telephoto end,
The distance between the first lens group and the second lens group decreases,
The distance between the second lens group and the third lens group changes,
The distance between the third lens group and the fourth lens group increases,
The distance between the fourth lens group and the fifth lens group increases.
A zoom lens characterized by things.
1.2 < β4t/β4w < 2.5 ・・・(1)
0.1 < (d34t − d34w)/fw < 1.5 ・・・(2)
0.4 < (d45t − d45w)/fw < 3.2 ・・・(3)
但し、
β4tは望遠端における前記第4レンズ群の横倍率、
β4wは広角端における前記第4レンズ群の横倍率、
d34wは広角端における前記第3レンズ群と前記第4レンズ群の空気間隔、
d34tは望遠端における前記第3レンズ群と前記第4レンズ群の空気間隔、
d45wは広角端における前記第4レンズ群と前記第5レンズ群の空気間隔、
d45tは望遠端における前記第4レンズ群と前記第5レンズ群の空気間隔、
fwは広角端における全系焦点距離
である。 The zoom lens according to claim 1, wherein the following conditional expressions (1), (2), and (3) are satisfied.
1.2 <β 4t / β 4w <2.5 (1)
0.1 <(d 34t - d 34w ) / f w <1.5 ··· (2)
0.4 <(d 45t - d 45w ) / f w <3.2 ··· (3)
However,
β 4t is the lateral magnification of the fourth lens group at the telephoto end,
β 4w is the lateral magnification of the fourth lens group at the wide-angle end,
d 34w is an air space between the third lens group and the fourth lens group at the wide angle end;
d 34t is an air space between the third lens group and the fourth lens group at the telephoto end;
d 45w is an air space between the fourth lens group and the fifth lens group at the wide-angle end;
d 45t is an air space between the fourth lens group and the fifth lens group at the telephoto end;
fw is the total focal length at the wide angle end.
2.0 < f2 / fw < 13.0 ・・・(4)
但し、f2は前記第2レンズ群の焦点距離である。 The zoom lens according to claim 2, wherein the following conditional expression (4) is satisfied.
2.0 <f 2 / f w < 13.0 ··· (4)
Here, f 2 is the focal length of the second lens group.
3 < ft / fw ・・・(5)
1.0 < fbw / fw < 1.9 ・・・(6)
但し、
ft は望遠端における全系焦点距離、
fbwは広角端におけるバックフォーカス(空気間隔)
である。 The zoom lens according to claim 3, wherein the following conditional expressions (5) and (6) are satisfied.
3 < ft / fw ... (5)
1.0 <f bw / f w <1.9 (6)
However,
f t is the total focal length at the telephoto end,
f bw is the back focus at the wide-angle end
It is.
60 < ν12 ・・・(7)
5 < |ν4p − ν4n| < 25 ・・・(8)
但し、
ν12は前記第1レンズ群中の前記負の第2レンズのアッベ数、
ν4pは前記第4レンズ群中の正レンズのアッベ数、
ν4nは前記第4レンズ群中の負レンズのアッベ数、
である。 The zoom lens according to claim 4, wherein the following conditional expressions (7) and (8) are satisfied.
60 <ν 12 (7)
5 <| ν 4p - ν 4n | <25 ··· (8)
However,
ν 12 is the Abbe number of the negative second lens in the first lens group,
ν 4p is the Abbe number of the positive lens in the fourth lens group,
ν 4n is the Abbe number of the negative lens in the fourth lens group,
It is.
1.0 < |f4 / fw| < 7.0 ・・・(9)
但し、f4は前記第4レンズ群の焦点距離である。 The zoom lens according to claim 6, wherein the following conditional expression (9) is satisfied.
1.0 <| f 4 / f w | <7.0 (9)
Here, f 4 is the focal length of the fourth lens group.
各群の間隔を変えて変倍を行うズームレンズにおいて、
無限遠物点から至近物点へのフォーカスに際し、
第4群および第5群が独立に移動する
事を特徴とするズームレンズ。 In order from the object side, a first lens group with negative refractive power, a second lens group with positive refractive power, a third lens group with positive refractive power, a fourth lens group with negative refractive power, and a fifth lens group with positive refractive power. Have
In zoom lenses that change the magnification by changing the interval between each group,
When focusing from an infinite object point to a close object point,
A zoom lens characterized in that the fourth group and the fifth group move independently.
1.2 < β4t/β4w < 2.5 ・・・(1)
0.1 < (d34t − d34w)/fw < 1.5 ・・・(2)
0.4 < (d45t − d45w)/fw < 3.2 ・・・(3) The zoom lens according to claim 8, wherein the following conditional expressions (1), (2), and (3) are satisfied.
1.2 <β 4t / β 4w <2.5 (1)
0.1 <(d 34t - d 34w ) / f w <1.5 ··· (2)
0.4 <(d 45t - d 45w ) / f w <3.2 ··· (3)
0.4 < △4w/△5w < 2.0 ・・・(10)
但し、
△4wは広角端における前記第4レンズ群のフォーカス移動量、
△5wは広角端における前記第5レンズ群のフォーカス移動量、
であり、いずれも光軸方向への移動を正符号とする。 The zoom lens according to claim 9, wherein the following conditional expression (10) is satisfied.
0.4 <△ 4w / △ 5w <2.0 (10)
However,
Δ4w is the amount of focus movement of the fourth lens group at the wide-angle end,
Δ5w is the amount of focus movement of the fifth lens group at the wide-angle end,
In both cases, movement in the optical axis direction is a positive sign.
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JP2013105131A (en) * | 2011-11-16 | 2013-05-30 | Canon Inc | Zoom lens and imaging apparatus having the same |
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