JPH06109976A - Lens with large power variation - Google Patents

Abstract

PURPOSE:To obtain the lens with large power variation which is not large in front-lens diameter and short in overall length, and has excellent image formation characteristics and reduces the quantity of movement of a group for focus correction even when the power variation range is extended to the wide-angle side. CONSTITUTION:This lens consists of a 1st positive group G1, a 2nd negative group G2 which is movable at the time of power variation, a 3rd group G3 which is movable toward an object side along a convex track when the power is varied from the wide-angle end to the telephoto end, a 4th positive group G4 which is so movable as to correct focus movement at the time of power variation and due to a shift in object point position, and a 5th group G5 which is always fixed; and an aperture stop is arranged between the most image side surface of the 2nd group G2 and the most object-side surface of the 4th group G4 and (1) 1.0<beta5<2.0 holds, where beta5 is the lateral power of the 5th group G5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high zoom lens,
In particular, the present invention relates to a variable focal length lens having a large rear diameter and a large aperture ratio and a high zoom ratio, which is composed of five groups.

[0002]

2. Description of the Related Art Recently, the progress of downsizing, weight reduction and cost reduction of video cameras has been remarkable, and the camcorder market has been remarkably activated and is rapidly spreading to general users. A video camera mainly consists of an electric circuit board, an actuator (mechanical) system, and an optical system. Conventionally, the miniaturization and cost reduction have been promoted mainly in the electric system, but recently these days. Therefore, the drastic downsizing of the imaging optical system is rapidly progressing. The reduction in size and cost of the imaging optical system is being made possible by the development of a new zoom type that effectively utilizes the advances in imager miniaturization technology, rotationally symmetric aspherical surface processing technology, and TTL automatic focusing technology. It is the current situation. As an example of the new zoom lens, Japanese Patent Laid-Open No. 62-
178917 is available. The variable power lens shown in this reference example has a first refractive power in order from the object side.
And a third lens unit having a positive refractive power, and a third lens unit having a positive refractive power, and a third lens unit having a positive refractive power. It is composed of an image forming system composed of a fourth group, but by adopting a rear focus and an aspherical surface which also serve as a compensator in this way, the number of constituent elements can be reduced to 10 or less. Space can be reduced,
The front lens diameter can be greatly reduced and the total length can be shortened. This type of lens is becoming the mainstream of current camcorder lenses due to the advantages of rear focus, which allows autofocus at high speed and low power, and the advantages of small size and low cost.

When such a reduction in size and weight and a reduction in cost have been thoroughly pursued, next, progress is made to high functionality.
One of them is the high zoom ratio of the shooting lens, and further,
This is the introduction of electronic zoom by digital processing of video signals. However, the high zoom ratio of lenses for camcorders is solely due to the extension on the telephoto side. Even if the electronic zoom is introduced to this, only the telephoto side is further extended, and the extension on the wide angle side still depends on the old method of attaching and detaching the front conversion lens. When the variable power lens of the method shown in the above cited example is used, when the variable power range is designed to be extended to the wide angle side,
If the front lens diameter is significantly increased, and the thickness is increased to secure the edge thickness of the front lens positive lens that will be insufficient by that amount, the entrance pupil will be deeper due to that, and a vicious cycle will occur in which the front lens diameter becomes larger, That is extremely difficult to achieve.

In order to solve such a drawback, a new attempt has been made in JP-A-3-215810. This is different from the variable magnification method used in Japanese Patent Laid-Open No. 62-178917, in which the third lens unit is movable along the convex locus toward the object side, and the aperture stop is also moved accordingly. By doing so, it is shown that a wide angle can be achieved. However, if the system in which the third lens unit is moved along the convex locus toward the object side and the aperture stop also moves in a similar manner as in this example, the zooming by the first to third lens units is used. The movement locus of the fourth group, which moves so as to correct the focus movement at the time, has a considerably large movement amount, and the capacity of the stepping motor for controlling the movement of the fourth group has to be increased, which leads to an increase in cost. At the same time, power consumption tends to increase. The zoom ratio of the embodiment of this reference is about 8, but when the zoom ratio is further increased,
The locus of movement of the group becomes a curve with a large amount of movement even more rapidly, which makes practical application difficult.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a situation, and its object is the above-mentioned conventional examples (JP-A-62-178917 and JP-A-3-2158).
(No. 10 etc.), the front lens diameter is not so large even when the variable power range is extended to the wide angle side, the overall length is short, the imaging characteristics are good, and the fourth lens group for focus correction is used. It is an object of the present invention to provide a high zoom lens that requires a small amount of movement.

Specifically, for example, the wide-angle end angle of view 63 °,
Variable ratio 12, total length 15.5 f _W (f _W : focal length of the entire system at wide-angle end), F number 1.8, large aperture ratio with about 12 components, high variable ratio, wide angle of view, compact size Is to provide a variable power lens.

[0007]

A high variable power lens of the present invention which achieves the above object has, in order from the object side, a first group having a positive refractive power and a negative refractive power, and is movable during zooming. The second group of
It has a positive refracting power and is movable along a convex locus on the object side when zooming from the wide-angle end to the telephoto end. The fourth lens group is movable so as to correct the focus movement due to the change of the second lens group and the fifth lens group having a negative refracting power and being always fixed. When an aperture stop is provided between the surfaces of the fourth group that are closest to the object side and the lateral magnification of the fifth group is β ₅ , (1) 1.0 <β ₅ <2.0 is satisfied. It is what

[0008]

The reason why the above structure is adopted and the function of the present invention will be described below. The small high-magnification lens of the present invention is
In order to achieve the above object, in order from the object side, a first group having a positive refracting power, a negative refracting power, a second group movable during zooming, a positive refracting power, When zooming from the wide-angle end to the telephoto end, it is possible to move along a convex locus on the object side.
From the fourth group, which has a positive refracting power and is movable so as to correct the focus movement due to the change of the magnification and the change of the object point position, and the fifth group which has a negative refracting power and is always fixed. With the construction, an aperture stop is provided between the most image-side surface of the second group and the most object-side surface of the fourth group, and the wide-angle end of the high-magnification lens is set to the wider-angle side. In this case, light rays around the screen at the wide-angle end are likely to be vignetted by the first group or the second group of the conventional example, and the diameter of each group must be increased. To prevent this, the lens structure must be such that the entrance pupil position is as shallow as possible. However, in the case of a high variable power lens, a large movement space is required for the second lens group that moves for variable power, and the entrance pupil position inevitably becomes deeper. Get stronger.
In order to reduce this movement space, the power of the second group should be increased, but the power of the first group must be increased to that extent, and the effect will be weakened.
Imaging performance near the telephoto end deteriorates.

Therefore, without increasing the power of the second lens group, from the wide-angle end so that the entrance pupil position is shallow at the focal length near the wide-angle end where light vignetting is likely to occur and slightly shifted to the telephoto side. When the magnification is changed to the telephoto end, the aperture stop is moved along a locus that is convex toward the object side.

However, if the aperture stop is simply moved, the change in the height of the light beam to the lens system behind the stop becomes large during zooming, and aberration fluctuations tend to occur. Similar to the movement locus, the method of moving along a locus that is convex toward the object side is adopted.

In the present invention, the movement of the focal position caused by the magnification change and the movement of the focal position caused by the movement of the object point position are corrected by using the fourth lens group. For a fixed object point, the movement locus (tracking curve) when correcting the fluctuation of the focus position due to zooming becomes steep rapidly as the zooming ratio increases, and the load on the actuator tends to increase. Further, it requires a large movement space, which is an obstacle to downsizing, and when the third group is moved toward the object side along the convex locus as described above, the tendency is further strengthened. Therefore, the fourth
By adding the fifth lens unit having negative refracting power to the image side of the lens unit, the tendency can be remarkably alleviated, the load on the fourth lens unit actuator is reduced, and at the same time, the moving space is reduced. And the total length can be shortened easily. The fifth group must satisfy the following conditions.

(1) 1.0 <β ₅ <2.0 This condition defines the magnification of the fifth lens unit, and if the lower limit is exceeded, the effect of adding the fifth lens unit will be aberration correction only. The movement locus of the fourth group is steep, and its movement space is large, which is not preferable. If the upper limit is exceeded, the fourth
Although the amount of movement of the group becomes small, the driving accuracy of the fourth group becomes too severe, which is not practical.

It should be noted that, as in the present invention, when the negative power is given to the rear group, the exit pupil position becomes shallow, but this becomes a problem when a recent image pickup device with a microlens is used. There is. Therefore, it is advisable to add a positive lens immediately before the imaging surface. In this way, the exit pupil position can be deepened without changing the total power. Also, it becomes easy to reduce the Petzval sum that tends to be negative. Since this positive lens requires less accuracy, it is preferable to use an inexpensive plastic lens.

As described above, the third aperture having an aperture stop and a positive refracting power.
By moving the group along a locus that is convex toward the object side during zooming, it is possible to obtain a high zoom ratio while covering a wider angle of view than in the conventional example. In order to mitigate the movement of the fourth group, which has a sharp movement trajectory,
By introducing the fifth lens group having a negative refractive power that satisfies the condition (1), and in some cases, by adding a positive lens immediately in front of the imaging surface, the total length is short, the tracking controllability is good, and the micro lens is provided. It is possible to obtain a high-magnification lens that can secure the exit pupil position without any problem even if an imaging device is used.

Further, in order to keep the diameter of the front lens compact while maintaining good aberration performance, it is desirable that the following condition (2) be satisfied. (2) 0.25 <f _III / f _I <1.3 where f _I is the focal length of the first lens group and f _III is the focal length of the third lens group.

The condition (2) defines the ratio of the focal lengths of the first lens unit and the third lens unit. When the value goes below the lower limit of this condition, the combined focal length of the fourth lens unit and the fifth lens unit becomes short, so that the angle of the off-axis light flux passing through the aperture stop tends to be large, and the front lens diameter becomes large, which is preferable. Absent. Further, if the upper limit of this condition is exceeded, it becomes difficult to achieve both compactness and aberration correction, which is not preferable.

Further, according to the present invention, the first group having the positive refracting power and the second group having the negative refracting power always exist on the object side of the aperture stop. Therefore, the first group and the second group are present. If the refracting power of each group is too strong, the entrance pupil position tends to be deep, and therefore the front lens diameter becomes large. Therefore, the front lens diameter can be made compact by satisfying the following condition (3) instead of the above condition (2). (3) 0.25 <f _S / f _I <0.9 However, when the focal length of the entire system at the wide-angle end is f _W and the focal length at the telephoto end is f _T , f _S = (f _W · f _T) is ^1/2.

Exceeding the upper limit of the condition (3) is advantageous for increasing the variable power ratio, but is not preferred because the front lens diameter tends to increase. If the lower limit of the condition (3) is exceeded, it is difficult to obtain a high zoom ratio, which is not preferable.

Further, the above condition (3) aims to make the front lens diameter compact by defining the focal length of the first lens unit, but instead of the first lens unit, the focal length of the second lens unit is set as follows. Even if the condition (4) is satisfied, the same effect can be obtained. (4) 1.2 <f _S / | f _II | <4.0 where f _II is the focal length of the second lens unit.

Exceeding the upper limit of the condition (4) is advantageous for increasing the variable power ratio, but is not preferable because the front lens diameter tends to increase. If the lower limit of the condition (4) is exceeded, it is difficult to obtain a high zoom ratio, which is not preferable.

The above-mentioned conditions (2) to (4) have the above-mentioned effects independently, but if a plurality of these conditions are simultaneously satisfied, the load applied to each group is reduced. Aberration performance can be improved relatively easily, and design flexibility is also improved.

The above conditions (2) to (4) are defined as follows.
Both were made with a focus on reducing the diameter of the front lens,
In order to suppress aberration variation due to focusing, it is desirable to satisfy the following condition (5) instead of the above conditions (2) to (4). (5) f _S / | f _I-III | <0.7 where f _I-III is the combined focal length of the first group to the third group when the focal length of the entire system is f _S.

When the value exceeds the upper limit of the condition (5), fluctuations in aberrations during focus adjustment become too large, and particularly spherical aberrations tend to deteriorate, which is not preferable.

Furthermore, the above condition (5) is replaced with the above condition (2).
If at least one of the conditions (4) is satisfied,
Along with the reduction of the front lens diameter, the fluctuation of aberration due to focusing is suppressed to be small, and an optical system with good aberration performance can be obtained.

As for the construction of each group, in order from the object side, the first group has a negative meniscus lens having a convex surface facing the object side, the positive lens, the positive lens, and the second group has a strong concave surface on the image side. Negative lens, a biconcave lens, a positive lens, a third group is a positive lens including an aspherical surface, and a fourth group is a cemented doublet lens and a negative meniscus lens, or a separated doublet,
It is preferable that the fifth lens unit has a positive lens and a negative lens in which surfaces having strong curvatures face each other, and if necessary, one positive lens is added immediately before the imaging surface. In that case, it is desirable to configure so as to satisfy the following conditions. (6) 0.25 <n ₆ −n ₅ <0.4 (7) 0.15 <n ₄ −n ₅ <0.4 where n ₄ , n ₅ and n ₆ are negative lenses of the second group, respectively. , Refractive index of biconcave lens, positive lens.

The condition (6) defines the difference in refractive index between the biconcave lens and the positive lens of the second lens group. As the zoom ratio increases, it is necessary to suppress the aberration variation due to the movement of the second lens unit to be sufficiently small. The air lens or the cemented surface formed by these two lenses plays an important role for that purpose, but on the contrary, it also causes high-order aberrations.
Therefore, by making the difference in refractive index between both lenses sufficiently large, the radius of curvature of the air lens or the cemented surface can be increased, and the occurrence of higher-order aberrations can be mitigated.
When the value goes below the lower limit of the condition (6), fluctuations of higher-order aberrations during zooming tend to increase. On the other hand, if the upper limit is exceeded,
There is a problem that it is difficult to construct with real glass materials. Condition (7) is
The biconcave lens inevitably has a low refractive index and weakens
In order to compensate for the negative power of the group, it is a condition that means that the refractive index of the negative lens having a strong concave surface facing the image surface of the second group is sufficiently high. If the lower limit of this condition is exceeded, the negative power of the second lens group becomes insufficient, and it becomes difficult to secure a sufficient variable power ratio, or the Petzval sum tends to have a large negative value. If the upper limit is exceeded, it will be difficult to construct with a real glass material.

[0027]

EXAMPLES Examples 1 to 1 of the high variable power lens of the present invention will now be described.
1 will be described. Although the lens data of each example will be shown later, FIGS. 1 to 11 show lens cross sections of Examples 1 to 11 at the wide-angle end, respectively. In each figure, the solid line indicating the movement locus of each group indicates the movement locus during zooming from the wide-angle end to the telephoto end when shooting at infinity, and the dotted line locus is
The movement locus of the fourth group G4 during zooming from the wide-angle end to the telephoto end during close-up photography with an object distance of 1 m is shown. Further, the high variable power lens of the present invention corrects the focus movement due to the change of the object point position by the movement of the fourth group G4, but the focus movement is corrected by the focusing from the solid line to the dotted line in each figure. ing.

First, the structure of each group in each embodiment will be described. The configurations of the first group G1 and the second group G2 are the same as in any of the embodiments, and the first group G1 includes a negative meniscus lens having a convex surface facing the object side and a positive meniscus lens having a convex surface facing the object side. The second lens group G2 includes a cemented lens and a positive meniscus lens having a convex surface directed toward the object side. The second lens group G2 includes a negative meniscus lens having a convex surface directed toward the object side, a biconcave lens, and a positive lens having a convex surface directed toward the object side. It consists of a total of 3 cemented lenses with a meniscus lens.

Regarding the constitution of the third group G3 to the fifth group,
In the case of the first embodiment, the third group G3 integrally has an aperture stop on the front side and is composed of one biconvex lens, and the fourth group G4 is a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fifth lens group G5 includes a total of two lenses, and includes 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. Therefore,
This embodiment consists of 11 lenses in total. Note that during infinity shooting, the third group G3 and the fourth group G4 move integrally along the same locus. The aspherical surfaces are used on the front surface of the biconvex lens of the third group G3, the final surface of the fourth group G4, and the front surface of the positive meniscus lens of the fifth group G5, a total of three surfaces.

In the second embodiment, the third lens group G3 integrally includes an aperture stop on the front side and is composed of one biconvex lens, and the fourth lens group G4 includes a negative meniscus lens having a convex surface directed toward the object side. Consists of a total of two cemented lenses of convex lens, 5th group G
Reference numeral 5 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 biconvex lens arranged immediately in front of the imaging surface. Therefore, this embodiment consists of 12 lenses in total. Note that during infinity shooting, the third group G3 and the fourth group G4 move integrally along the same locus. The aspherical surfaces are used for the front surface of the biconvex lens of the third group G3, the final surface of the fourth group G4, the front surface of the positive meniscus lens of the fifth group G5, and the front surface of the biconvex lens, for a total of four surfaces.

In the third embodiment, the third lens group G3 integrally has an aperture stop on the front side and is composed of one biconvex lens, and the fourth lens group G4 includes a negative meniscus lens having a convex surface directed toward the object side. Consists of a total of two cemented lenses of convex lens, 5th group G
5 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 positive meniscus lens having a convex surface directed toward the object side, which is disposed immediately before the image pickup surface. Become. Therefore, this embodiment consists of 12 lenses in total. The aspherical surface is the front surface of the biconvex lens of the third group G3, the final surface of the fourth group G4, and the fifth group G5.
It is used on a total of 4 surfaces in front of the bi-positive meniscus lens.

In the fourth embodiment, the third lens group G3 integrally has an aperture stop on the front side and is composed of one biconvex lens, and the fourth lens group G4 includes a negative meniscus lens having a convex surface directed toward the object side. Consists of a total of two cemented lenses of convex lens, 5th group G
5 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 positive meniscus lens having a convex surface directed toward the object side, which is disposed immediately before the image pickup surface. Become. Therefore, this embodiment consists of 12 lenses in total. The aspherical surfaces are used for the final surface of the second group G2, the front surface of the biconvex lens of the third group G3, the final surface of the fourth group G4, and the front surface of the bipositive meniscus lens of the fifth group G5, for a total of five surfaces. There is.

In the fifth embodiment, the third lens group G3 integrally has an aperture stop on the front side and is composed of one biconvex lens, and the fourth lens group G4 is a negative meniscus lens having a biconvex lens and a convex surface directed toward the image side. Consists of a total of two cemented lenses, the fifth group G5
Consists of a negative meniscus lens having a convex surface facing the object side, a positive meniscus lens having a convex surface facing the object side, and a positive meniscus lens having a convex surface facing the object side, which is arranged immediately before the imaging surface. . Therefore, this embodiment has a total of 1
It consists of two lenses. The aspherical surface is the last surface of the second group G2, the front surface of the biconvex lens of the third group G3, the first surface of the fourth group G4.
It is used for a total of five surfaces, and the front surface of the double positive meniscus lens of the fifth group G5.

In the sixth embodiment, the third group G3 has an aperture stop integrally on the front side and is composed of one biconvex lens, and the fourth group G4 is a negative meniscus lens having a convex surface directed toward the object side. Consists of a total of two cemented lenses of convex lens, 5th group G
Reference numeral 5 includes 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, which is disposed immediately before the imaging surface. Therefore, this embodiment consists of a total of 11 lenses. The aspherical surface is the second group G
2, the last surface, the front surface of the biconvex lens in the third group G3, the fourth group G
4 is used as the final surface, the rear surface of the negative meniscus lens of the fifth group G5, and the front surface of the positive meniscus lens as a total of 5 surfaces.

In the seventh embodiment, the third lens group G3 integrally has an aperture stop on the front side, and comprises a biconvex lens and a negative meniscus lens having a convex surface facing the object side.
The fourth lens unit G5 includes a cemented lens including a biconvex lens and a negative meniscus lens having a convex surface directed toward the image side. The fifth group G5 includes a negative meniscus lens having a convex surface directed toward the object side and a lens immediately before the imaging surface. It consists of a total of two positive meniscus lenses with the convex surface facing the object side. Therefore, this embodiment consists of 12 lenses in total. The aspherical surface is the last surface of the second group G2, the front surface of the biconvex lens of the third group G3, the first surface of the fourth group G4.
It is used for a total of five surfaces, the rear surface of the negative meniscus lens of the fifth group G5 and the front surface of the positive meniscus lens.

In the eighth embodiment, the third lens unit G3 integrally has an aperture stop on the front side, and comprises a biconvex lens, a biconvex lens, and a negative meniscus lens having a convex surface directed toward the object side. The fourth lens group G4 includes one biconvex lens, and includes a fifth lens.
The group G5 is composed of 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, which is arranged immediately in front of the imaging surface. Therefore, this embodiment consists of 12 lenses in total. The aspherical surface is the final surface of the second group G2, the front surface of the first biconvex lens of the third group G3, the front surface of the biconvex lens of the fourth group G4, and the fifth group G5.
The negative meniscus lens is used for the rear surface and the positive meniscus lens is used for the front surface in total of 5 surfaces.

In the ninth embodiment, the aperture stop is the third group G.
Although it is arranged on the front side of the third lens group 3, it moves along a locus different from that of the second lens group G2 and the third lens group G3 during zooming, as illustrated. The third group G3 includes one biconvex lens, and the fourth group G3
The fourth lens group G5 includes a negative meniscus lens having a convex surface directed toward the object side and a cemented lens having a biconvex lens.
The negative meniscus lens has a convex surface directed toward the object side, and the positive meniscus lens having a convex surface directed toward the object side is arranged immediately in front of the imaging surface. Therefore, this embodiment consists of a total of 11 lenses. The aspherical surface is the final surface of the second group G2, the front surface of the biconvex lens of the third group G3, the final surface of the fourth group G4, and the rear surface of the negative meniscus lens of the fifth group G5.
It is used for a total of 5 front faces of the positive meniscus lens.

In the tenth embodiment, the third group G3 is composed of a biconvex lens, an aperture stop integrally arranged, a positive meniscus lens having a convex surface directed toward the object side, and a biconcave lens. Is composed of one biconvex lens, and is in the fifth group G
Reference numeral 5 includes 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, which is disposed immediately before the imaging surface. Therefore, this embodiment consists of 12 lenses in total. The aspherical surface is the second group G
2, the last surface, the front surface of the biconvex lens in the third group G3, the fourth group G
The front surface of the biconvex lens of No. 4, the rear surface of the negative meniscus lens of the fifth group G5, and the front surface of the positive meniscus lens are used for a total of five surfaces.

In the eleventh embodiment, the third group G3 is composed of a biconvex lens and an aperture stop integrally arranged on the rear side thereof, and the fourth group G4 is composed of a negative meniscus lens having a convex surface directed toward the object side and a biconvex lens. Consists of a total of 2 cemented lenses made up of convex lenses,
The fifth group G5 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 positive meniscus lens having a convex surface directed toward the object side, which is disposed immediately before the imaging surface. It consists of 3 sheets. Therefore, this embodiment consists of 12 lenses in total. The aspherical surface is the second group G
2, the last surface, the front surface of the biconvex lens in the third group G3, the fourth group G
The final surface of No. 4 and the front surface of the bi-positive meniscus lens of the fifth group G5 are used in total of five surfaces.

The front and rear surfaces of the fifth group G5 of each embodiment and the plane-parallel plates arranged therein represent optical members such as filters.

In the following, the symbols are those other than the above,
f is the focal length of the entire system, F _NO is the F number, ω is the half angle of view,
r ₁ , r ₂ ... Radius of curvature of each lens surface, d ₁ , d ₂ ... Distance between each lens surface, n _d1 , n _d2 ..., Refractive index of d-line of each lens, v _d1 , v _d2 . Is the Abbe number of each lens, and the aspherical shape is expressed by the following equation, where x is the optical axis direction and y is the direction orthogonal to the optical axis. ^{x = (y 2 / r)} / [1+ {1-P (y 2 / r 2)} 1/2] + A 4 y 4 + A 6 y 6 + A 8 y 8 + A 10 y 10 where, r is near Axial radius of curvature, P is the conic coefficient, A ₄ , A ₆ ,
A ₈ and A ₁₀ are aspherical coefficients.

Example 1 f = 5.15 ~ 17.58 ~ 60.00 F _NO = 1.85 ~ 2.06 ~ 2.01 ω = 31.5 ° ~ 10.2 ° 3.0 ° r ₁ = 41.2268 d ₁ = 1.1000 n _d1 = 1.84666 ν _d1 = 23.78 r ₂ = 25.4265 _{d 2 = 6.0000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 166.2931 d 3 = 0.1500 r 4 = 32.0995 d 4 = 3.4000 n d3 = 1.66672 ν d3 = 48.32 r 5 = 143.3074 d 5 = ( variable) r ₆ = 132.6620 _{d 6 = 0.9000 n d4 = 1.85026} ν d4 = 32.28 r 7 = 7.5882 d 7 = 3.8000 r 8 = -32.2691 d 8 = 0.8000 n d5 = 1.48749 ν d5 = 70.20 r 9 = 9.0937 d 9 = 3.0000 n d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 32.7182 d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 11.7702 (aspherical surface) d ₁₂ = 2.7000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -139.5648 d ₁₃ = 3.3000 r ₁₄ = 10.5081 d ₁₄ = 0.8000 n _d8 = 1.84666 ν _d8 = 23.78 r ₁₅ = 6.5810 d ₁₅ = 4.0000 n _d9 = 1.58913 ν _d9 = 61.18 r ₁₆ = -17.1548 (aspherical surface) d ₁₆ = (variable) r ₁₇ = 166.1652 d ₁₇ = 0.8000 n _d10 = 1.80610 ν _d10 = 40.95 r ₁₈ = 7.7713 d ₁₈ = 0.4000 r ₁₉ = 14.8726 (aspherical surface) d ₁₉ = 2.0000 n _d11 = 1.58913 ν _d11 = 61.18 r ₂₀ = 43.8112 d ₂₀ = 1.0000 r ₂₁ = ∞ d ₂₁ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₂ = ∞ d ₂₂ = 1.2100 r ₂₃ = ∞ d ₂₃ = 0.6000 n _d13 = 1.48749 ν _d13 = 70.20 r ₂₄ = ∞ Aspheric coefficient 12th surface P = 1 A ₄ = -0.84987 × 10 ^-4 A ₆ = -0.20058 × 10 ^-5 A ₈ = 0.14067 × 10 ^-6 A ₁₀ = -0.30366 × 10 ^-8 16th surface P = 1 A ₄ = 0.42220 × 10 ^-3 A ₆ = -0.13230 × 10 ^-5 A ₈ = -0.52250 × 10 ^-7 A ₁₀ = -0.54602 × 10 ^-8 19th surface P = 1 A ₄ = -0.45934 × 10 ^-4 A ₆ = 0.20354 × 10 ^-4 A ₈ = -0.50297 × 10 ^-6 A ₁₀ = -0.120 90 × 10 ^-6 β ₅ = 1.616 f _III / f _I = 0.409 f _S / f _I = 0.388 f _S / ｜ f _II │ = 1.922 f _S / f _I-III = 0.459 n ₆ -n ₅ = 0.359 n ₄ -n ₅ = 0.363
.

[0043] Example 2 f = 5.15 ~ 17.58 ~ 60.00 F NO = 1.85 ~ 2.09 ~ 2.04 ω = 31.5 ° ~ 10.2 ° 3.0 ° r 1 = 41.5179 d 1 = 1.1000 n d1 = 1.84666 ν d1 = 23.78 r 2 = 25.2499 _{d 2 = 6.0000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 165.9358 d 3 = 0.1500 r 4 = 32.6393 d 4 = 3.4000 n d3 = 1.66672 ν d3 = 48.32 r 5 = 168.1081 d 5 = ( variable) r ₆ = 173.3201 d ₆ = 0.9000 n _d4 = 1.83400 ν _d4 = 37.16 r ₇ = 7.8302 d ₇ = 3.8000 r ₈ = -29.8723 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 9.3391 d ₉ = 3.0000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 31.2051 d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 12.8162 (aspherical surface) d ₁₂ = 2.4000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -416.9902 d ₁₃ = 3.3000 r ₁₄ = 10.6561 d ₁₄ = 0.8000 n _d8 = 1.84666 ν _d8 = 23.78 r ₁₅ = 6.6821 d ₁₅ = 4.2000 _{nd 9} = 1.58913 ν _d9 = 61.18 r ₁₆ = -16.9807 (aspherical surface) d ₁₆ = (variable) r ₁₇ = 197.8083 d ₁₇ = 0.8000 n _d10 = 1.80610 ν _d10 = 40.95 r ₁₈ = 7.9701 d ₁₈ = 0.4000 r ₁₉ = 13.8850 (aspherical surface) d ₁₉ = 1.8000 n _d11 = 1.58913 ν _d11 = 61.18 r ₂₀ = 53.8060 d ₂₀ = 1.0000 r ₂₁ = ∞ d ₂₁ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₂ = ∞ d ₂₂ = 0.4000 r ₂₃ = 30.9673 (aspherical surface) d ₂₃ = 1.9000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₄ = -33.5176 d ₂₄ = 1.2100 r ₂₅ = ∞ d ₂₅ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₆ = ∞ Aspheric coefficient 12th surface P = 1 A ₄ = -0.67246 × 10 ^-4 A ₆ = -0.22699 × 10 ^-5 A ₈ = 0.15482 × 10 ^-6 A ₁₀ = -0.31594 × 10 ^-8 16th surface P = 1 A ₄ = 0.33631 × 10 ^-3 A ₆ = -0.17566 × 10 ^-5 A ₈ = 0.15173 × 10 ^-7 A ₁₀ = -0.27686 × 10 ^-8 Surface 19 P = 1 A ₄ = -0.58468 × 10 ^-4 A ₆ = 0.18208 × 10 ^-4 A ₈ = -0.19845 × 10 ^-5 A ₁₀ = 0.82199 × 10 ^-7 23rd surface P = 16.7315 A ₄ = 0.94606 × 10 ^-4 A ₆ = 0.12180 × 10 ^-4 A ₈ =- 0.96495 × 10 ^-6 A ₁₀ = 0 β ₅ = 1.543 f _III / f _I = 0.468 f _S / f _I = 0.389 f _S / ｜ f _II ｜ = 1.944 f _S / f _I-III = 0.325 n ₆ −n ₅ = 0.359 n ₄ -n ₅ = 0.347
.

Example 3 f = 5.15 ~ 17.58 ~ 60.00 F _NO = 1.86 ~ 2.18 ~ 2.15 ω = 31.5 ° ~ 10.2 ° 3.0 ° r ₁ = 48.6449 d ₁ = 1.1000 n _d1 = 1.84666 v _d1 = 23.78 r ₂ = 26.5764 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 1433.1905 d 3 = 0.1500 r 4 = 27.5358 d 4 = 3.7000 n d3 = 1.66672 ν d3 = 48.32 r 5 = 109.7352 d 5 = ( variable) r ₆ = 110.4877 d ₆ = 0.9000 n _d4 = 1.83400 ν _d4 = 37.16 r ₇ = 6.9198 d ₇ = 3.5000 r ₈ = -14.1237 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 9.3009 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 40.7111 d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 23.6424 (aspherical surface) d ₁₂ = 2.1000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -65.2226 d ₁₃ = (variable) r ₁₄ = 11.2463 d ₁₄ = 0.8000 n _d8 = 1.84666 ν _d8 = 23.78 r ₁₅ = 7.3097 d ₁₅ = 4.5000 n _d9 = 1.58913 ν _d9 = 61.18 r ₁₆ = -19.8581 (aspherical surface) d ₁₆ = ( Variable) r ₁₇ = 31.1671 d ₁₇ = 0.8000 n _d10 = 1.83400 ν _d10 = 37.16 r ₁₈ = 8.3648 d ₁₈ = 1.0000 r ₁₉ = 10.0709 (aspherical surface) d ₁₉ = 2.1000 n _d11 = 1.58913 ν _d11 = 61.18 r ₂₀ = 36.7454 d ₂₀ = 2.2357 r ₂₁ = ∞ d ₂₁ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₂ = ∞ d ₂₂ = 0.4000 r ₂₃ = 24.5145 (aspherical surface) d ₂₃ = 1.7000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₄ = 99.4003 d ₂₄ = 1.2100 r ₂₅ = ∞ d ₂₅ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₆ = ∞ Aspherical coefficient 12th surface P = 1 A ₄ = -0.81707 × 10 ^-4 A ₆ = 0.25973 × 10 ^-5 A ₈ = -0.887485 × 10 ^-7 A ₁₀ = 0.10448 × 10 ^-8 16th surface P = 1A ₄ = 0.57528 × 10 ^-4 A ₆ = 0.86689 × 10 ^-5 A ₈ = -0.43159 × 10 ^-6 A ₁₀ = 0.71730 × 10 ^-8 19th surface P = 1 A ₄ = -0.11655 × 10 ^-3 A ₆ = 0.10038 × 10 ^-4 A ₈ = -0.44848 × 10 ^-6 A ₁₀ = 0.14924 × 10 ^-7 23rd surface P = 1 A ₄ = 0.14779 × 10 ^-3 A ₆ = -0.48255 × 10 ^-4 A ₈ = 0.32113 × 10 ^-5 A ₁₀ = -0.13812 × 10 ^-6 β ₅ = 1.271 f _III / f _I = 0.731 f _S / f _I = 0.432 f _S / ｜ f _II ｜ = 2.413 f _S / f _I-III = -0.0557 n ₆ -N ₅ = 0.359 n ₄ -n ₅ = 0.347
.

[0045] Example 4 f = 5.15 ~ 17.58 ~ 60.00 F NO = 1.86 ~ 2.18 ~ 2.15 ω = 31.5 ° ~ 10.2 ° 3.0 ° r 1 = 48.9829 d 1 = 1.1000 n d1 = 1.84666 ν d1 = 23.78 r 2 = 26.4056 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 2980.0458 d 3 = 0.1500 r 4 = 27.4720 d 4 = 3.7000 n d3 = 1.67003 ν d3 = 47.25 r 5 = 112.5276 d 5 = ( variable) r ₆ = 111.5576 d ₆ = 0.9000 n _d4 = 1.80100 ν _d4 = 34.97 r ₇ = 6.5701 d ₇ = 3.5000 r ₈ = -13.2640 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 9.4809 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 45.8500 (aspherical surface) d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 23.5662 (aspherical surface) d ₁₂ = 2.1000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -70.1401 d ₁₃ = (variable) r ₁₄ = 11.1680 d ₁₄ = 0.8000 n _d8 = 1.84666 ν _d8 = 23.78 r ₁₅ = 7.3776 d ₁₅ = 4.5000 n _d9 = 1.58913 ν _d9 = 61.18 r ₁₆ = -20.2708 (aspherical surface) d ₁₆ = (variable) r ₁₇ = 32.6113 d ₁₇ = 0.8000 n _d10 = 1.83400 ν _d10 = 37.16 r ₁₈ = 8.4427 d ₁₈ = 1.0000 r ₁₉ = 9.9291 (aspherical surface) d ₁₉ = 2.1000 n _d11 = 1.58913 ν _d11 = 61.18 r ₂₀ = 36.9166 d ₂₀ = 2.4023 r ₂₁ = ∞ d ₂₁ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₂ = ∞ d ₂₂ = 0.4000 r ₂₃ = 24.2370 (aspherical surface) d ₂₃ = 1.7000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₄ = 85.8387 d ₂₄ = 1.2100 r ₂₅ = ∞ d ₂₅ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₆ = ∞ Aspheric coefficient 10th surface P = 1 A ₄ = -0.33777 × 10 ^-4 A ₆ = 0.96382 × 10 ^-6 A ₈ = -0.16935 × 10 ^-7 A ₁₀ = 0 12th surface P = 1 A ₄ = -0.76667 _{^{× 10 -4 A 6 = 0.24271 ×}} 10 -5 A 8 = -0.94886 × 10 -7 A 10 = 0.14146 × 10 -8 16th surface _{P = 1 A 4 = 0.90653 ×} 10 -4 A 6 = 0.70656 × 10 - ^{_{5 A 8 = -0.37791 × 10 -6}} A 10 = 0.64935 × 10 -8 19th surface _{P = 1A 4 = -0.70264 × 10} -4 A 6 = 0.15360 × 10 -4 A 8 = -0.11677 × 10 - ⁵ A ₁₀ = 0.37919 × 10 ^-7 23rd surface P = 1 A ₄ = -0.15728 × 10 ^-3 A ₆ = -0.77801 × 10 ^-4 A ₈ = 0.51668 × 10 ^-5 A ₁₀ = -0.16430 × 10 ^-6 β ₅ = 1.270 f _III / f _I = 0.752 f _S / f _I = 0.438 f _S / | f _II | = 2.455 f _S / f _I-III = -0.0740 n ₆ -n ₅ = 0.359 n ₄ -n ₅ = 0.314
.

Example 5 f = 5.15 ~ 17.58 ~ 60.00 F _NO = 1.86 ~ 2.21 ~ 2.11 ω = 31.5 ° ~ 10.2 ° 3.0 ° r ₁ = 49.3029 d ₁ = 1.1000 n _d1 = 1.84666 ν _d1 = 23.78 r ₂ = 26.5580 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 1337.9724 d 3 = 0.1500 r 4 = 27.4225 d 4 = 3.7000 n d3 = 1.67003 ν d3 = 47.25 r 5 = 105.8052 d 5 = ( variable) r ₆ = 104.9194 d ₆ = 0.9000 n _d4 = 1.80100 ν _d4 = 34.97 r ₇ = 6.2340 d ₇ = 3.5000 r ₈ = -17.4801 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 9.1491 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 44.4892 (aspherical surface) d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 21.5451 (aspherical surface) d ₁₂ = 2.1000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -50.4931 d ₁₃ = (variable) r ₁₄ = 20.9010 (aspherical surface) d ₁₄ = 4.5000 n _d8 = 1.58913 ν _d8 = 61.18 r ₁₅ = -7.7555 d ₁₅ = 0.8000 n _d9 = 1.84666 ν _d9 = 23.78 r ₁₆ =- 12.0313 d ₁₆ = (variable) r ₁₇ = 39.7400 d ₁₇ = 0.8000 n _d10 = 1.83400 ν _d10 = 37.16 r ₁₈ = 8.3497 d ₁₈ = 1.0000 r ₁₉ = 9.0749 (aspherical surface) d ₁₉ = 2.1000 n _d11 = 1.58913 ν _d11 = 61.18 r ₂₀ = 41.5791 d ₂₀ = 2.7222 r ₂₁ = ∞ d ₂₁ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₂ = ∞ d ₂₂ = 0.4000 r ₂₃ = 25.1729 (aspherical surface) d ₂₃ = 1.7000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₄ = 58.4007 d ₂₄ = 1.2100 r ₂₅ = ∞ d ₂₅ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₆ = ∞ Aspheric coefficient 10th surface P = 1 A ₄ = -0.73438 × 10 ^-4 A ₆ = 0.21797 × 10 ^-5 A ₈ = -0.70409 × 10 ^-7 A ₁₀ = 0 12th surface P = 1 A ₄ = -0.55870 × 10 ^-4 A ₆ = 0.50334 × 10 ^-6 A ₈ = -0.32793 × 10 ^-7 A ₁₀ = 0.73728 × 10 ^-9 14th surface P = 1 A ₄ = -0.10464 × 10 ^-3 A ₆ = -0.20783 × 10 ^-5 A ₈ = 0.78274 × 10 ^-7 A ₁₀ = -0.13763 × 10 ^-8 19th surface P = 1 A ₄ = -0.17092 × 10 ^-4 A ₆ = 0.74912 × 10 ^-5 A ₈ = -0.59054 × 10 ^-6 A ₁₀ = 0.24852 × 10 ^-7 23rd surface P = 1A ₄ = -0.70069 × 10 ^-4 A ₆ = -0.69659 × 10 ^-4 A ₈ = 0.49173 × 10 ^-5 A ₁₀ = -0.17157 × 10 ^-6 _{β 5 = 1.270 f III / f} I = 0.630 f S / f I = 0.428 f S / | f II | = 2.324 f S / f I-III = 0.0772 n 6 -n 5 = 0.359 n 4 -n 5 = 0.314
.

[0047] Example 6 f = 5.15 ~ 17.58 ~ 60.00 F NO = 1.86 ~ 2.09 ~ 2.15 ω = 31.5 ° ~ 10.2 ° 3.0 ° r 1 = 49.3537 d 1 = 1.1000 n d1 = 1.84666 ν d1 = 23.78 r 2 = 26.5119 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 844.0106 d 3 = 0.1500 r 4 = 27.0137 d 4 = 3.7000 n d3 = 1.67003 ν d3 = 47.25 r 5 = 107.4470 d 5 = ( variable) r ₆ = 106.3036 d ₆ = 0.9000 n _d4 = 1.80100 ν _d4 = 34.97 r ₇ = 7.2328 d ₇ = 3.5000 r ₈ = -11.2733 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 8.7754 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 37.5089 (aspherical surface) d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 21.7729 (aspherical surface) d ₁₂ = 2.1000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -72.3173 d ₁₃ = (variable) r ₁₄ = 11.2938 d ₁₄ = 0.8000 n _d8 = 1.84666 ν _d8 = 23.78 r ₁₅ = 7.3029 d ₁₅ = 4.5000 n _d9 = 1.58913 ν _d9 = 61.18 r ₁₆ = -19.0102 (aspherical surface) d ₁₆ = (variable) r ₁₇ = 72.2260 _{17 = 0.8000 n d10 = 1.58423 ν} d10 = 30.49 r 18 = 15.0212 ( _{aspherical) d 18 = 3.9740 r 19 =} ∞ d 19 = 6.3000 n d11 = 1.54771 ν d11 = 62.83 r 20 = ∞ d 20 = 0.4000 r 21 = 20.1404 _{(aspherical) d 21 = 1.7000 n d12 =} 1.49241 ν d12 = 57.66 r 22 = 79.4196 d 22 = 1.2100 r 23 = ∞ d 23 = 0.6000 n d13 = 1.48749 ν d13 = 70.20 r 24 = ∞ Aspheric coefficient 10th surface P = 1 A ₄ = 0.36849 × 10 ^-4 A ₆ = 0.85849 × 10 ^-6 A ₈ = 0.16305 × 10 ^-7 A ₁₀ = 0 12th surface P = 1 A ₄ = -0.68982 × 10 ^-4 A ₆ = 0.22183 × 10 ^-5 A ₈ = -0.87033 × 10 ^-7 A ₁₀ = 0.12840 × 10 ^-8 16th surface P = 1 A ₄ = 0.97893 × 10 ^-4 A ₆ = 0.65630 × 10 ^-5 A ₈ = -0.35433 × 10 ^-6 A ₁₀ = 0.60002 × 10 ^-8 18th surface P = 1 A ₄ = 0.96953 × 10 ^-4 A ₆ = -0.888 180 × 10 ^-5 A ₈ = 0.26168 × 10 ^-6 A ₁₀ = 0 21st surface P = 1 A ₄ = -0.50127 × 10 ^-3 A ₆ = -0.68751 × 10 ^-5 A ₈ = -0.44091 × 10 ^-6 A ₁₀ = 0 β ₅ = 1.269 f _III / f _I = 0.702 f _S / f _I = 0.431 f _S / | f _II | = 2.430 f _S / f _I-III = 0.547 n ₆ -n ₅ = 0.359 n ₄ -n ₅ = 0.314
.

[0048] Example 7 f = 5.15 ~ 17.58 ~ 60.00 F NO = 1.86 ~ 2.04 ~ 2.09 ω = 31.5 ° ~ 10.2 ° 3.0 ° r 1 = 48.6479 d 1 = 1.1000 n d1 = 1.84666 ν d1 = 23.78 r 2 = 27.3067 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 432.2291 d 3 = 0.1500 r 4 = 29.0372 d 4 = 3.7000 n d3 = 1.65844 ν d3 = 50.86 r 5 = 116.1249 d 5 = ( variable) r ₆ = 115.0131 d ₆ = 0.9000 n _d4 = 1.83400 ν _d4 = 37.16 r ₇ = 7.1322 d ₇ = 3.5000 r ₈ = -14.8634 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 10.7360 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 88.3413 (aspherical surface) d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 8.9714 (aspherical surface) d ₁₂ = 3.7000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -34.1315 d ₁₃ = 0.1500 r ₁₄ = 26.6219 d ₁₄ = 0.8000 n _d8 = 1.80610 ν _d8 = 40.95 r ₁₅ = 8.7687 d ₁₅ = (variable) r ₁₆ = 11.7459 (aspherical) d ₁₆ = 4.5000 n _d9 = 1.58913 ν _d9 = 61.18 r ₁₇ = -8.0854 d ₁₇ = 0.8000 n _d10 = 1.80518 ν _d10 = 25.43 r ₁₈ = -13.6671 d ₁₈ = (variable) r ₁₉ = 30.0849 d ₁₉ = 0.8000 n _d11 = 1.58423 ν _d11 = 30.49 r ₂₀ = 9.9473 (aspherical surface) d ₂₀ = 2.5114 r ₂₁ = ∞ d ₂₁ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₂ = ∞ d ₂₂ = 0.4000 r ₂₃ = 12.5034 (aspherical surface) d ₂₃ = 1.7000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₄ = 27.5750 d ₂₄ = 1.2100 r ₂₅ = ∞ d ₂₅ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₆ = ∞ Aspherical coefficient 10th surface P = 1 A ₄ = -0.270 25 × 10 ^-4 A ₆ = 0.14778 × 10 ^-6 A ₈ = -0.11989 × 10 ^-8 A ₁₀ = 0 12th surface P = 1 A ₄ = -0.16340 × 10 ^-3 A ₆ = -0.17226 × 10 ^-5 A ₈ = -0.1059 2 × 10 ^-7 A ₁₀ = 0 16th surface P = 1 A ₄ = -0.15 126 × 10 ^-3 A ₆ = -0.128 17 × 10 ^-5 A ₈ = 0.48361 × 10 ^-7 A ₁₀ = 0 20th surface P = 1 A ₄ = 0.1150 ₄ × 10 ^-3 A ₆ = -0.87052 × 10 ^-5 A ₈ = 0.40211 × 10 ^-6 A ₁₀ = 0 23rd surface P = 1 A ₄ = 0.36345 × 10 ^-3 A ₆ = -0.22025 × 10 ^-4 A ₈ = 0.50014 × 10 ^-6 A ₁₀ = 0 β ₅ = 1.270 f _III / f _I = 0.689 f _S / f _I = 0.401 _{f S / | f II | =} 2.128 f S / f I-III = 0.448 n 6 -n 5 = 0.359 n 4 -n 5 = 0.347
.

Example 8 f = 5.15 to 17.58 to 60.00 F _NO = 1.86 to 2.04 to 2.09 ω = 31.5 ° to 10.2 ° 3.0 ° r ₁ = 46.3320 d ₁ = 1.1000 n _d1 = 1.84666 v _d1 = 23.78 r ₂ = 27.6061 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 651.6182 d 3 = 0.1500 r 4 = 28.5073 d 4 = 3.6000 n d3 = 1.62299 ν d3 = 58.14 r 5 = 107.2832 d 5 = ( variable) r ₆ = 106.1988 d ₆ = 0.9000 n _d4 = 1.77250 ν _d4 = 49.66 r ₇ = 7.7456 d ₇ = 3.9000 r ₈ = -11.2936 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 15.0093 d ₉ = 2.3000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 150.4581 (aspherical surface) d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = 1.5000 r ₁₂ = 14.9578 (aspherical surface) d ₁₂ = 2.6000 n _d7 = 1.66524 ν _d7 = 55.12 r ₁₃ = -76.8064 d ₁₃ = 0.1500 r ₁₄ = 16.4932 d ₁₄ = 2.2000 n _d8 = 1.58267 v _d8 = 46.33 r ₁₅ = -494.6834 d ₁₅ = 0.8000 r ₁₆ = 95.7939 d ₁₆ = 0.8000 n _d9 = 1.84666 v _d9 = 23.78 r ₁₇ = 11.3082 d ₁₇ = (variable) r ₁₈ = 10.8619 (aspherical surface) d ₁₈ = 3.3000 n _d10 = 1.58913 ν _d10 = 61.18 r ₁₉ = -19.7402 d ₁₉ = (variable) r ₂₀ = 30.7610 d ₂₀ = 0.8000 n _d11 = 1.58423 ν _d11 = 30.49 r ₂₁ = 9.0104 (Aspherical surface) d ₂₁ = 1.4000 r ₂₂ = ∞ d ₂₂ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₃ = ∞ d ₂₃ = 0.4000 r ₂₄ = 11.9053 (aspherical surface) d ₂₄ = 1.7000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₅ = 34.3844 d ₂₅ = 1.2100 r ₂₆ = ∞ d ₂₆ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₇ = ∞ Aspheric coefficient 10th surface P = 1 A ₄ = -0.27658 × 10 ^-4 A ₆ = -0.35480 × 10 ^-6 A ₈ = 0.20967 × 10 ^-7 A ₁₀ = 0 12th surface P = 1 A ₄ = -0.46537 × 10 ^-4 A ₆ = -0.99368 × 10 ^-6 A ₈ = 0.15703 × 10 ^-7 A ₁₀ = 0 18th surface P = 1 A ₄ = -0.17455 × 10 ^-3 A ₆ = -0.33653 × 10 ^-5 A ₈ = 0.76028 × 10 ^-7 A ₁₀ = 0 21st surface P = 1 A ₄ = 0.22469 × 10 ^-3 A ₆ = -0.27049 × 10 ^-4 A ₈ = 0.11262 × 10 ^-5 A ₁₀ = 0 24th surface P = 1 A ₄ = 0.26447 × 10 ^-3 A ₆ = -0.50161 × 10 ^-4 A ₈ = 0.49950 × 10 ^-6 A ₁₀ = 0 β ₅ = 1.270 f _III / f _I = 0.574 f _S / f _I = 0.409 f _{S / | f II | = 2.200} f S / f I-III = 0.780 n 6 -n 5 = 0.359 n 4 -n 5 = 0.285
.

[0050] Example 9 f = 5.15 ~ 17.58 ~ 60.00 F NO = 1.86 ~ 2.11 ~ 2.14 ω = 31.5 ° ~ 10.2 ° 3.0 ° r 1 = 50.7458 d 1 = 1.1000 n d1 = 1.84666 ν d1 = 23.78 r 2 = 25.9574 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 647.2871 d 3 = 0.1500 r 4 = 27.5776 d 4 = 3.7000 n d3 = 1.68250 ν d3 = 44.65 r 5 = 127.2963 d 5 = ( variable) r ₆ = 126.5391 d ₆ = 0.9000 n _d4 = 1.80100 ν _d4 = 34.97 r ₇ = 7.2843 d ₇ = 3.5000 r ₈ = -12.0938 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 8.8444 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 37.6677 (aspherical surface) d ₁₀ = (variable) r ₁₁ = ∞ (aperture) d ₁₁ = (variable) r ₁₂ = 20.7361 (aspherical surface) d ₁₂ = 2.1000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₃ = -53.6235 d ₁₃ = (variable) r ₁₄ = 10.1462 d ₁₄ = 0.8000 n _d8 = 1.84666 ν _d8 = 23.78 r ₁₅ = 6.7238 d ₁₅ = 4.5000 n _d9 = 1.58913 ν _d9 = 61.18 r ₁₆ = -19.3327 (non-variable) Spherical surface) d ₁₆ = (variable) r ₁₇ = 73. 8493 d ₁₇ = 0.8000 n _d10 = 1.58423 ν _d10 = 30.49 r ₁₈ = 9.9263 (aspherical surface) d ₁₈ = 2.8105 r ₁₉ = ∞ d ₁₉ = 6.3000 n _d11 = 1.54771 ν _d11 = 62.83 r ₂₀ = ∞ d ₂₀ = 0.4000 r ₂₁ = 15.1517 _{(aspherical) d 21 = 1.7000 n d12 =} 1.49241 ν d12 = 57.66 r 22 = 84.8457 d 22 = 1.2100 r 23 = ∞ d 23 = 0.6000 n d13 = 1.48749 ν d13 = 70.20 r 24 = ∞ Aspherical surface 10th surface P = 1 A ₄ = 0.26655 × 10 ^-4 A ₆ = 0.11457 × 10 ^-5 A ₈ = 0.12038 × 10 ^-7 A ₁₀ = 0 12th surface P = 1 A ₄ = -0.60438 × 10 ^-4 A ₆ = 0.32146 × 10 ^-6 A ₈ = 0.33627 × 10 ^-7 A ₁₀ = -0.91890 × 10 ^-9 16th surface P = 1 A ₄ = 0.15549 × 10 ^-3 A ₆ = 0.55055 × 10 ^-5 A ₈ = -0.29328 × 10 ^-6 A ₁₀ = 0.44761 × 10 ^-8 18th surface P = 1 A ₄ = 0.21739 × 10 ^-3 A ₆ = -0.20237 × 10 ^-4 A ₈ = 0.75429 × 10 ^-6 A ₁₀ = 0 21st surface P = 1 A ₄ = -0.80460 × 10 ^-4 A ₆ = -0.14854 × 10 ^-4 A ₈ = -0.63785 × 10 ^-6 A ₁₀ = 0 β ₅ = 1.400 f _III / f _I = 0.625 f _S / f _I = 0.428 f _S / | f _II | = 2.373 f _S / f _I-III = 0.862 n ₆ -n ₅ = 0.359 n ₄ -n ₅ = 0.314
.

Example 10 f = 5.15 ~ 17.58 ~ 60.00 F _NO = 1.86 ~ 2.04 ~ 2.09 ω = 31.5 ° ~ 10.2 ° 3.0 ° r ₁ = 48.5865 d ₁ = 1.1000 n _d1 = 1.84666 ν _d1 = 23.78 r ₂ = 27.2588 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 455.3065 d 3 = 0.1500 r 4 = 29.5164 d 4 = 3.6000 n d3 = 1.65844 ν d3 = 50.86 r 5 = 128.2994 d 5 = ( variable) r ₆ = 127.3849 d ₆ = 0.9000 n _d4 = 1.80610 ν _d4 = 40.95 r ₇ = 7.6226 d ₇ = 3.9000 r ₈ = -16.7784 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 11.5963 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 60.6529 (aspherical surface) d ₁₀ = (variable) r ₁₁ = 13.8512 (aspherical surface) d ₁₁ = 2.3000 n _d7 = 1.66524 ν _d7 = 55.12 r ₁₂ = -202.0041 d ₁₂ = 0.6000 r ₁₃ = ∞ (Aperture) d ₁₃ = 1.5000 r ₁₄ = 15.9995 d ₁₄ = 1.8000 n _d8 = 1.67003 ν _d8 = 47.25 r ₁₅ = 138.4845 d ₁₅ = 0.8000 r ₁₆ = -2429.7156 d ₁₆ = 0.8000 n _d9 = 1.80518 ν _d9 = 25.43 r ₁₇ = 10.3949 d ₁₇ = (variable r ₁₈ = 9.5861 _{(aspherical) d 18 = 3.3000 n d10 =} 1.58913 ν d10 = 61.18 r 19 = -16.6742 d 19 = ( _{Variable) r 20 = 24.4581 d 20 =} 0.8000 n d11 = 1.58423 ν d11 = 30.49 r 21 = 7.8870 (aspherical surface) d ₂₁ = 1.4000 r ₂₂ = ∞ d ₂₂ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₃ = ∞ d ₂₃ = 0.4000 r ₂₄ = 10.3762 (aspherical surface) d ₂₄ = 2.2000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₅ = 38.4791 d ₂₅ = 1.2100 r ₂₆ = ∞ d ₂₆ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₇ = ∞ Aspherical coefficient 10th surface P = 1 A ₄ = -0.22286 × 10 ^-4 A ₆ = -0.17408 × 10 ^-6 A ₈ = 0.31905 × 10 ^-8 A ₁₀ = 0 11th surface P = 1 A ₄ = -0.27644 × 10 ^-4 A ₆ = -0.41026 × 10 ^-6 A ₈ = -0.52935 × 10 ^-8 A ₁₀ = 0 18th surface P = 1 A ₄ = -0.27803 × 10 ^-3 A ₆ = -0.29162 × 10 ^-5 A ₈ = 0.58773 × 10 ^-7 A ₁₀ = 0 21st surface P = 1 A ₄ = 0.48928 × 10 ^-3 A ₆ = -0.57900 × 10 ^-4 A ₈ = 0.27500 × 10 ^-5 A ₁₀ = 0 24th surface P = 1 A ₄ = 0.121 10 × 10 ^-2 A ₆ = -0.545 13 × 10 ^-4 A ₈ = 0.10133 × 10 ^-5 A ₁₀ = 0 β ₅ = 1.270 f _III / f _I = 0.698 f _S / f _I = 0.405 _{f S / | f II | =} 2.045 f S / f I-III = 0.580 n 6 -n 5 = 0.359 n 4 -n 5 = 0.319
.

Example 11 f = 5.15 to 17.58 to 60.00 F _NO = 1.86 to 2.18 to 2.15 ω = 31.5 ° to 10.2 ° 3.0 ° r ₁ = 48.4331 d ₁ = 1.1000 n _d1 = 1.84666 ν _d1 = 23.78 r ₂ = 26.7655 _{d 2 = 5.1000 n d2 = 1.56873} ν d2 = 63.16 r 3 = 17050.4298 d 3 = 0.1500 r 4 = 27.6169 d 4 = 3.7000 n d3 = 1.66672 ν d3 = 48.32 r 5 = 110.0610 d 5 = ( variable) r ₆ = 108.2896 d ₆ = 0.9000 n _d4 = 1.80100 ν _d4 = 34.97 r ₇ = 6.9714 d ₇ = 3.5000 r ₈ = -14.0637 d ₈ = 0.8000 n _d5 = 1.48749 ν _d5 = 70.20 r ₉ = 9.4503 d ₉ = 2.6000 n _d6 = 1.84666 ν _d6 = 23.78 r ₁₀ = 39.3635 (aspherical surface) d ₁₀ = (variable) r ₁₁ = 20.9972 (aspherical surface) d ₁₁ = 2.1000 n _d7 = 1.58913 ν _d7 = 61.18 r ₁₂ = -86.8208 d ₁₂ = 0.8000 r ₁₃ = ∞ (Aperture) d ₁₃ = (Variable) r ₁₄ = 11.1717 d ₁₄ = 0.8000 n _d8 = 1.84666 ν _d8 = 23.78 r ₁₅ = 7.4201 d ₁₅ = 4.5000 n _d9 = 1.58913 ν _d9 = 61.18 r ₁₆ = -20.1319 (aspheric) d ₁₆ = (variable) r ₁₇ = 31.9 705 d ₁₇ = 0.8000 n _d10 = 1.80100 ν _d10 = 34.97 r ₁₈ = 7.8159 d ₁₈ = 1.0000 r ₁₉ = 11.0842 (aspherical surface) d ₁₉ = 2.1000 n _d11 = 1.58913 ν _d11 = 61.18 r ₂₀ = 95.2442 d ₂₀ = 2.0790 r ₂₁ = ∞ d ₂₁ = 6.3000 n _d12 = 1.54771 ν _d12 = 62.83 r ₂₂ = ∞ d ₂₂ = 0.4000 r ₂₃ = 15.1381 (aspherical) d ₂₃ = 1.7000 n _d13 = 1.49241 ν _d13 = 57.66 r ₂₄ = 495.7590 d ₂₄ = 1.2100 r ₂₅ = ∞ d ₂₅ = 0.6000 n _d14 = 1.48749 ν _d14 = 70.20 r ₂₆ = ∞ Aspheric coefficient 10th surface P = 1 A ₄ = -0.15672 × 10 ^-4 A ₆ = 0.16675 × 10 ^-6 A ₈ = 0.11985 × 10 ^-7 A ₁₀ = 0 11th surface P = 1 A ₄ = -0.71017 × 10 ^-4 A ₆ = 0.19429 × 10 ^-5 A ₈ = -0.14798 × 10 ^-6 A ₁₀ = 0.33691 × 10 ^-8 16th surface P = 1 A ₄ = 0.11912 × 10 ^-3 A ₆ = 0.56770 × 10 ^-5 A ₈ = -0.40152 × 10 ^-6 A ₁₀ = 0.82922 × 10 ^-8 19th surface P = 1 A ₄ = -0.60065 × 10 ^-4 A ₆ = 0.20930 × 10 ^-4 A ₈ = -0.24113 × 10 ^-5 A ₁₀ = 0.96736 × 10 ^-7 23rd surface P = 1 A ₄ = 0.35380 × 10 ^-3 A ₆ = -0.52968 × 10 ^-4 A ₈ = 0.48508 × 10 ^-5 A ₁₀ = -0.16920 × 10 ^-6 β ₅ = 1.222 f _III / f _I = 0.724 f _S / f _I = 0.440 f _S / | f _II | = 2.349 f _S / f _I-III = 0.499 n ₆ -n ₅ = 0.359 n ₄ -n ₅ = 0.314
.

Spherical surfaces at the wide-angle end (a), the standard state (b), the telephoto end (c), and the telephoto end (d) at the object distance of 1 m in Examples 1 to 11 when shooting at infinity. aberration,
Aberration diagrams showing astigmatism, distortion, and chromatic aberration of magnification are shown in FIGS. 12 to 22, respectively.

[0054]

As is apparent from the above description, according to the high variable power lens of the present invention, the first group having a positive refractive power,
It is composed of a second group having a negative refracting power, a third group having a positive refracting power, and a fourth group having a positive refracting power. In a variable power lens that moves so as to correct the focal point movement due to the magnification and the movement of the object point, an aperture stop is arranged between the most image side surface of the second group and the most object side surface of the fourth group, By moving the aperture stop and the third lens unit along a locus of a similar shape that is convex toward the object side during zooming, it is possible to achieve high zooming with the focal length extended to the wide-angle side without increasing the front lens diameter. It is possible to obtain a variable power lens with a high ratio, and at the same time, to reduce the amount of movement of the fourth lens unit due to the movement of the third lens unit and the high zoom ratio, and to save the moving space, a negative refractive power is used. It is possible to reduce the amount of movement of the fourth group by adding the fifth group having the above, and to shorten the total length by the saved moving space. Further, since the lens group closest to the image side has a negative refracting power, the exit pupil becomes shallow and a problem of shading is likely to occur, but this problem is solved by adding one positive lens immediately before the image sensor. it can.

Finally, according to the present invention, the angle of view at the wide-angle end is 2ω = 63 °, the zoom ratio is 12 times, the F value is 1.8 (wide-angle end),
Full length 15f _W, and front lens diameter 5.8F _W, yet high specification in a very small, good zoom lens of the imaging characteristics.

[Brief description of drawings]

FIG. 1 is a sectional view of a high variable power lens according to a first exemplary embodiment of the present invention at a wide-angle end.

FIG. 2 is a sectional view of a high variable power lens according to a second exemplary embodiment at a wide-angle end.

FIG. 3 is a sectional view of a high variable power lens according to a third exemplary embodiment at a wide-angle end.

FIG. 4 is a sectional view of a high variable power lens according to a fourth example at a wide-angle end.

FIG. 5 is a sectional view of a high variable power lens according to a fifth exemplary embodiment at a wide-angle end.

FIG. 6 is a sectional view of a high variable power lens according to a sixth example at a wide-angle end.

FIG. 7 is a sectional view of a high variable power lens according to a seventh example at a wide-angle end.

FIG. 8 is a sectional view of a high variable power lens according to an eighth example at a wide-angle end.

FIG. 9 is a sectional view of a high variable power lens of a ninth example at a wide-angle end.

FIG. 10 is a sectional view of a high variable power lens of the tenth example at a wide-angle end.

FIG. 11 is a sectional view of a high variable power lens according to an example 11 at a wide-angle end.

FIG. 12 is a spherical aberration at the wide-angle end (a), the standard state (b), the telephoto end (c), and the telephoto end (d) at the time of shooting at an object distance of 1 m in Example 1 at infinity shooting; FIG. 6 is an aberration diagram showing astigmatism, distortion, and chromatic aberration of magnification.

FIG. 13 is an aberration diagram similar to FIG. 12 of Example 2.

FIG. 14 is an aberration diagram similar to FIG. 12 of Example 3;

FIG. 15 is an aberration diagram similar to FIG. 12 of Example 4.

FIG. 16 is an aberration diagram similar to FIG. 12 of Example 5.

FIG. 17 is an aberration diagram similar to FIG. 12 of Example 6.

FIG. 18 is an aberration diagram similar to FIG. 12 of Example 7.

FIG. 19 is an aberration diagram similar to FIG. 12 of Example 8;

FIG. 20 is an aberration diagram similar to FIG. 12 of Example 9.

FIG. 21 is an aberration diagram similar to FIG. 12 of Example 10.

22 is an aberration diagram similar to FIG. 12 of Example 11. FIG.

[Explanation of symbols]

 G1 ... 1st group G2 ... 2nd group G3 ... 3rd group G4 ... 4th group G5 ... 5th group

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 26, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a sectional view of a high variable power lens according to a first exemplary embodiment of the present invention at a wide-angle end.

FIG. 2 is a sectional view of a high variable power lens according to a second exemplary embodiment at a wide-angle end.

FIG. 3 is a sectional view of a high variable power lens according to a third exemplary embodiment at a wide-angle end.

FIG. 4 is a sectional view of a high variable power lens according to a fourth example at a wide-angle end.

FIG. 5 is a sectional view of a high variable power lens according to a fifth exemplary embodiment at a wide-angle end.

FIG. 6 is a sectional view of a high variable power lens according to a sixth example at a wide-angle end.

FIG. 7 is a sectional view of a high variable power lens according to a seventh example at a wide-angle end.

FIG. 8 is a sectional view of a high variable power lens according to an eighth example at a wide-angle end.

FIG. 9 is a sectional view of a high variable power lens of a ninth example at a wide-angle end.

FIG. 10 is a sectional view of a high variable power lens of the tenth example at a wide-angle end.

FIG. 11 is a sectional view of a high variable power lens according to an example 11 at a wide-angle end.

12A is an aberration diagram showing spherical aberration, astigmatism, distortion, and chromatic aberration of magnification at the wide-angle end during infinity imaging in Example 1. FIG.

12B is an aberration diagram showing spherical aberration, astigmatism, distortion, and lateral chromatic aberration in the standard state at the time of infinity imaging in Example 1. FIG.

12C is an aberration diagram showing spherical aberration, astigmatism, distortion, and chromatic aberration of magnification at the telephoto end of Example 1. FIG.

FIG. 12d is an aberration diagram showing spherical aberration, astigmatism, distortion, and lateral chromatic aberration at the telephoto end at the time of shooting with an object distance of 1 m in Example 1.

13a is an aberration diagram similar to FIG. 12a of Example 2. FIG.

13b is an aberration diagram similar to FIG. 12b of Example 2. FIG.

13c is an aberration diagram similar to FIG. 12c of Example 2. FIG.

13d is an aberration diagram similar to FIG. 12d of Example 2. FIG.

14a is an aberration diagram similar to FIG. 12a of Example 3. FIG.

14b is an aberration diagram similar to FIG. 12b of Example 3. FIG.

14c is an aberration diagram similar to FIG. 12c of Example 3. FIG.

14d is an aberration diagram similar to FIG. 12d of Example 3. FIG.

15a is an aberration diagram similar to FIG. 12a of Example 4. FIG.

15b is an aberration diagram similar to FIG. 12b of Example 4. FIG.

15c is an aberration diagram similar to FIG. 12c of Example 4. FIG.

15d is an aberration diagram similar to FIG. 12d of Example 4. FIG.

16a is an aberration diagram similar to FIG. 12a of Example 5. FIG.

16b is an aberration diagram similar to FIG. 12b of Example 5. FIG.

16c is an aberration diagram similar to FIG. 12c of Example 5. FIG.

16d is an aberration diagram similar to FIG. 12d of Example 5. FIG.

17a is an aberration diagram similar to FIG. 12a of Example 6. FIG.

17b is an aberration diagram similar to FIG. 12b of Example 6. FIG.

17c is an aberration diagram similar to FIG. 12c of Example 6. FIG.

17d is an aberration diagram similar to FIG. 12d of Example 6. FIG.

18a is an aberration diagram similar to FIG. 12a of Example 7. FIG.

18b is an aberration diagram similar to FIG. 12b of Example 7. FIG.

18c is an aberration diagram similar to FIG. 12c of Example 7. FIG.

18d is an aberration diagram similar to FIG. 12d of Example 7. FIG.

19a is an aberration diagram similar to FIG. 12a of Example 8. FIG.

19b is an aberration diagram similar to FIG. 12b of Example 8. FIG.

19c is an aberration diagram similar to FIG. 12c of Example 8. FIG.

19d is an aberration diagram similar to FIG. 12d of Example 8. FIG.

20a is an aberration diagram similar to FIG. 12a of Example 9. FIG.

20b is an aberration diagram similar to FIG. 12b of Example 9. FIG.

20c is an aberration diagram similar to FIG. 12c of Example 9. FIG.

20d is an aberration diagram similar to FIG. 12d of Example 9. FIG.

21a is an aberration diagram similar to FIG. 12a of Example 10. FIG.

21b is an aberration diagram similar to FIG. 12b of Example 10. FIG.

21c is an aberration diagram similar to FIG. 12c of Example 10. FIG.

21d is an aberration diagram similar to FIG. 12d of Example 10. FIG.

22a is an aberration diagram similar to FIG. 12a of Example 11. FIG.

22b is an aberration diagram similar to FIG. 12b of Example 11. FIG.

22c is an aberration diagram similar to FIG. 12c of Example 11. FIG.

22d is an aberration diagram similar to FIG. 12d of Example 11. FIG.

[Explanation of Codes] G1 ... First group G2 ... Second group G3 ... Third group G4 ... Fourth group G5 ... Fifth group

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

[Figure 10]

FIG. 11

FIG. 12a

FIG. 12b

FIG. 12c

FIG. 12d

FIG. 13a

FIG. 13b

FIG. 13c

FIG. 13d

Figure 14a

FIG. 14b

FIG. 14c

FIG. 14d

FIG. 15a

FIG. 15b

FIG. 15c

FIG. 15d

FIG. 16a

FIG. 16b

FIG. 16c

FIG. 16d

FIG. 17a

FIG. 17b

FIG. 17c

FIG. 17d

FIG. 18a

FIG. 18b

FIG. 18c

FIG. 18d

FIG. 19a

FIG. 19b

FIG. 19c

FIG. 19d

Figure 20a

FIG. 20b

FIG. 20c

FIG. 20d

FIG. 21a

FIG. 21b

FIG. 21c]

FIG. 21d

Figure 22a

FIG. 22b

FIG. 22c

FIG. 22d

Claims (1)

[Claims] 1. A first group having positive refracting power, a second group having negative refracting power, and a second group movable during zooming, having positive refracting power in order from the object side, having a wide-angle end to a telephoto end. When zooming to, have a positive refractive power in the third group that is movable along a convex locus on the object side,
It is composed of a fourth group movable so as to correct focus movement due to zooming and a change in object point position, a fifth group having a negative refracting power and always fixed, and most of the second group. A high zoom lens having an aperture stop between the image side surface and the most object side surface of the fourth group, and satisfying the following conditions: (1) 1.0 <β ₅ < 2.0 Here, β ₅ is the lateral magnification of the fifth group.