JP2011141548A - Zoom lens and imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a zoom lens having a wide angle and a high variable power ratio, and which is bright, such that an F value at a wide angle end is about 2.0 to 2.8, and to provide an imaging apparatus that uses the lens. <P>SOLUTION: The zoom lens includes a first group being movable along an optical axis, when varying power and having positive refractive power; a second group moving to an image side along the optical axis, when varying power from the wide angle end to a telephoto end and having negative refractive power; and at least two rear groups having an interval being variable when varying power, in the order, from an object side; the first group moves, while a reciprocating locus projecting is drawn on the image side; and when the moving amount from the wide angle end to the telephoto end of the first group, when focusing on an infinity object point, is defined as Δ<SB>z1</SB>and the moving amount from the wide angle end to the telephoto end of the second group, when focusing on the infinity object point is defined as Δ<SB>z2</SB>, the zoom lens satisfies conditions: 3<Δ<SB>z2</SB>-Δz1/L<9 and -1.0<Δ<SB>z1</SB>/Δ<SB>z2</SB><0.5(Δ<SB>z2</SB>>0), where image-side movement is positive and L is the diagonal length of an effective imaging surface disposed in the vicinity of an image forming surface. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a zoom lens and an imaging apparatus, and more particularly, to a zoom lens having a large aperture ratio and a high zoom ratio including a wide-angle range suitable for cameras, particularly video cameras and digital cameras, and an imaging apparatus using the same.

  In recent years, digital cameras (electronic cameras) have attracted attention as next-generation cameras that replace silver salt 135 mm film (commonly known as Leica version) cameras. Among them, in a digital camera for general users, a single-focus lens having a diagonal field angle of about 60 ° or a zoom lens having about 3 times the wide-angle end is the mainstream. On the other hand, when targeting high-class users, it must be further extended to the wide-angle side or the telephoto side, and must be compatible with the TTL optical viewfinder. Of course, a high imaging performance is required. Several zoom lenses for the silver salt 135 mm film camera are commercially available as 7 to 10 times class TTL optical viewfinder zoom lenses having a diagonal angle of view of about 75 ° at the wide-angle end. However, a wide-angle high-magnification zoom lens that is suitable for an imaging format that is a fraction of a size smaller than this and that has a bright F-number of about 2.0 to 2.8 at the wide-angle end is used for non-business purposes such as a TV camera. Little is known.

  The present invention has been made in view of such a current state of the art, and its purpose is a zoom lens with a wide angle high zoom ratio, and an F value at the wide angle end of about 2.0 to 2.8. To provide a bright zoom lens and an imaging apparatus using the same.

In order to achieve the above object, the zoom lens of the present invention includes:
In order from the object side, a first lens unit having a positive refractive power that is movable along the optical axis at the time of zooming, and negative refraction that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A zoom lens comprising a second group having power and a rear group having at least two movable subgroups;
Or
In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and negative refraction that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A zoom lens comprising: a second group having power; and a rear group having a variable interval at the time of at least two subsequent magnifications;
Is the basic configuration.

  Such a configuration is advantageous in achieving high zooming while suppressing various aberrations. Features of the present invention based on these configurations will be described below.

The first zoom lens of the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. A second group having a negative refractive power that moves along the image side along with the rear group having a variable interval at the time of zooming, and in particular, the focal length f ₁ of the first group satisfies the following condition The zoom lens is characterized by that.

(1) 6 <f ₁ / L <20
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

  If the lower limit 6 of the condition (1) is exceeded, the spherical aberration on the telephoto side will be undercorrected. If the upper limit of 20 is exceeded, the amount of movement of the movable group at the time of zooming increases, and the entire lens system tends to be large.

  The above conditions are more preferably as follows.

(1 ′) 6.5 <f ₁ / L <16
Furthermore, the following is more preferable.

(1 ") 7 <f ₁ / L <12
The second zoom lens according to the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and an optical axis at the time of zooming from the wide angle end to the telephoto end. A zoom lens of the type including a second group having a negative refractive power moving along the image side along with a rear group having at least two movable subgroups, or an optical axis at the time of zooming in order from the object side A first group having a positive refractive power that is movable along the optical axis, a second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end, and at least 2 In any zoom lens including a rear group having a variable interval at the time of zooming, the focal length f ₁ of the first group and the anomalous dispersion Δθ _gF of the medium of at least one positive lens of the first group are The zoom lens satisfies the following conditions.

(1) 6 <f ₁ / L <20
(2) 0.015 <Δθ _gF <0.1
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

In addition, the definition of the anomalous dispersion Δθ _gF of each medium (glass material) is
θ _gF = A _gF + B _gF · ν _d + Δθ _gF
on the other hand,
θ _gF = ( _ng −n _F ) / (n _F −n _C )
ν _d = (n _d −1) / (n _F −n _C )
n _d , n _F , n _C , and _ng are refractive indexes for d line, F line, C line, and g line, A _gF , and B _gF are glass cord 511605 (trade name NSL7 at OHARA INC.)
is a coefficient of a straight line determined by two glass type of _{θ gF = 0.5436 ν d = 60.49} ) and the glass cord 620363 (trade name _{PBM2 θ gF = 0.5828 ν d =} 36.26 at Ohara Inc.), specifically, A _gF is 0.641462485, B _gF is -0.
001617829,
It is.

  If the lower limit of 0.015 of the above condition (2) is exceeded, the short wavelength axial chromatic aberration at the telephoto end cannot be corrected and color blurring tends to occur at the edge of a subject having a large luminance difference. When the upper limit of 0.1 is exceeded, there is almost no inexpensive medium, and reverse chromatic aberration occurs.

  The above conditions are more preferably as follows.

(1 ′) 6.5 <f ₁ / L <16
(2 ′) 0.020 <Δθ _gF <0.08
Furthermore, the following is more preferable.

(1 ") 7 <f ₁ / L <12
(2 ") 0.025 <Δθ _gF <0.06
The third zoom lens of the present invention includes, in order from the object side, a first group having positive refractive power that is movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two closest to the image side being a configuration of a positive lens, and a second group in which any surface in the group is aspherical, and at least two movable sub lenses A zoom lens of a type including a rear group having a total of 6 or more and 11 or less lenses, or a positive refractive power movable along the optical axis at the time of zooming in order from the object side The first group and the second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. In any type of zoom lens and a rear lens group having a variable spacing when at least two zooming, movement amount Delta] z ₁ from the wide-angle end of the first group of the focal point at infinity to the telephoto end, The zoom lens is characterized in that the following condition is satisfied with respect to the movement amount Δz ₂ from the wide-angle end to the telephoto end of the second group at the time of focusing on an object point at infinity.

(3) 3 <(Δz ₂ −Δz ₁ ) / L <9
However, the movement toward the image side is positive. L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

  As described above, when zooming from the wide-angle end to the telephoto end, the second group moves relatively away from the first group. In particular, a high zoom zoom lens requires a large movement space because of its large movement amount. The problem is that the wider the angle of view, the diameter of the first group may become too large. If the upper limit of 9 in the condition (3) is exceeded, the diameter of the first group becomes too large and the lens system becomes large. If the lower limit of 3 is exceeded, the zooming burden on the rear group increases, and the variation in spherical aberration during zooming tends to increase.

  The above conditions are more preferably as follows.

(3 ′) 3.2 <(Δz ₂ −Δz ₁ ) / L <8
Furthermore, the following is more preferable.

(3 ") 3.4 <(Δz ₂ -Δz ₁ ) / L <7
In addition, the group with the largest burden due to the wide angle and the high zoom ratio is the second group. Furthermore, the size of the diameter of the first group is determined by the power, movement amount, and configuration of the second group. From the viewpoint of the diameter of the first group, it is advantageous that the principal point of the second group is located on the object side as much as possible. Therefore, the second group is preferably composed of a front group having a negative refractive power and a rear group having a positive refractive power. In this case, at least three negative lenses in the second group are used for the fact that barrel-shaped distortion is likely to occur due to the wide angle and high magnification, and that astigmatism is difficult to correct in the entire zoom range. Including a negative lens, the most image side is a positive lens structure, or the three most object side lenses are negative lenses and the image side has a positive lens, or includes a negative lens and the most image side 2 This can be largely eliminated by using a positive lens configuration and making any surface in the second group an aspherical surface.

  If the number of lenses in the rear group is less than 6, the correction of chromatic aberration and spherical aberration becomes severe. On the other hand, if the number exceeds 11, the entire rear group becomes thick and it is difficult to secure a sufficient zoom space. .

  The rear group has a plurality of groups, and includes at least two sub-groups having positive refractive power, and among them, the most object-side positive refractive power sub-group and the most image-side positive refractive power sub-group. It is more preferable that each lens is composed of three or more lenses for increasing chromatic aberration, spherical aberration, coma aberration, and large aperture.

The fourth zoom lens of the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two closest to the image side being a configuration of a positive lens, and a second group in which any surface in the group is aspherical, and at least two movable sub lenses A zoom lens of a type including a rear group having a total of 6 or more and 11 or less lenses, or a positive refractive power movable along the optical axis at the time of zooming in order from the object side The first group and the second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. In any type of zoom lens and a rear lens group having a variable spacing when at least two zooming, movement amount Delta] z ₁ from the wide-angle end of the first group of the focal point at infinity to the telephoto end, The zoom lens is characterized in that the following condition is satisfied with respect to the movement amount Δz ₂ from the wide-angle end to the telephoto end of the second group at the time of focusing on an object point at infinity.

(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive.

  This is a condition for making the trajectory of the image point by the first and second group combining system appropriate when zooming from the wide-angle end to the telephoto end. The trajectory determines to some extent the magnification change region and focal length of the rear group. If the upper limit of 0.5 of the above condition (4) is exceeded, the magnification of the rear group becomes smaller or the focal length becomes longer, and the lens system becomes large as a whole for the value of L. It tends to be. If the lower limit of −1.0 is exceeded, the lens system becomes smaller as a whole for L, but if L is small and the F value is bright, it is difficult to correct spherical aberration and coma.

  Note that condition (3) may be added thereto.

  The above conditions are more preferably as follows.

(4 ′) −0.9 <Δz ₁ / Δz ₂ <0.4 (Δz ₂ > 0)
Furthermore, the following is more preferable.

(4 ") -0.8 <Δz ₁ / Δz ₂ <0.3 (Δz ₂ > 0)
The fifth zoom lens of the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. A zoom lens of the type including a second group having a negative refractive power moving along the image side along with a rear group having at least two movable subgroups, or an optical axis at the time of zooming in order from the object side A first group having a positive refractive power that is movable along the optical axis, a second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end, and at least 2 In any zoom lens including a rear group having a variable interval at the time of zooming, the first group moves while drawing a reciprocating locus convex toward the image side, and the first group at the time of focusing on an object point at infinity. It is characterized in that the movement amount Δz _1WM from the wide angle end of the group to the middle focal length _{f M (= √ (f W} · f T)) is positive A zoom lens. However, the movement toward the image side is positive. Note that f _W is the total focal length when the infinite object point is in focus at the wide-angle end, and f _T is the total focal length when the infinite object point is in focus at the telephoto end. f _M is the geometric mean of f _W and f _T. When zooming from the wide-angle end to the telephoto end, the second lens group moves away from the first lens group, and the rear lens group moves away from the image plane. Note that the image plane position is constant.

  When an electronic image sensor or a field frame with a small value of L is used, the ratio of the focal length of the first group to the entire system becomes very large, so the magnification of the rear group is particularly small, and is about the same at the telephoto end. Value. At the same time, since the focal length of the rear group is longer than that of the second group, the locus of the image point by the first and second group synthesis system when zooming from the wide-angle end to the telephoto end changes abruptly toward the image side near the wide-angle end. It is necessary to make it fairly gentle at the telephoto end. Therefore, the first group should draw a locus as described above.

The sixth zoom lens of the present invention includes, in order from the object side, a first group having positive refractive power that is movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. A zoom lens of the type including a second group having a negative refractive power moving along the image side along with a rear group having at least two movable subgroups, or an optical axis at the time of zooming in order from the object side A first group having a positive refractive power that is movable along the optical axis, a second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end, and at least 2 In any zoom lens including a rear group having a variable interval at the time of zooming, the first group moves while drawing a convex reciprocating locus on the image side, and only the above condition (4), or It is a zoom lens characterized by satisfying both conditions (3) and (4).

  Thereby, the effect described regarding the 4th and 5th zoom lens is acquired.

  The seventh zoom lens of the present invention includes, in order from the object side, a first group having positive refractive power that is movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two closest to the image side being a configuration of a positive lens, and a second group in which any surface in the group is aspherical, and at least two movable sub lenses A zoom lens of a type including a rear group having a total of 6 or more and 11 or less lenses, or a positive refractive power movable along the optical axis at the time of zooming in order from the object side The first group and the second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Is any of the zoom lens of the type of zoom lens and a rear lens group having a variable spacing when at least two zooming.

  The group with the greatest burden due to the wide angle and the high zoom ratio is the second group. Furthermore, the size of the diameter of the first group is determined by the power, movement amount, and configuration of the second group. From the viewpoint of the diameter of the first group, it is advantageous that the principal point of the second group is located on the object side as much as possible. Therefore, it is preferable to arrange a positive lens on the most image side. Next, in terms of the fact that barrel-shaped distortion is likely to occur due to the wide angle and high magnification, and that astigmatism is difficult to correct over the entire zoom range, there are three or more negative lenses in the second group. This can be largely eliminated by configuring at least one of them as an aspherical surface. In particular, it is desirable that the aspherical surface has a shape in which the divergence becomes weaker or the convergence becomes stronger as compared with the curvature on the axis as it goes to the periphery. Similarly to the above description, the second lens unit is configured so that three lenses closest to the object side are negative lenses and the image side includes positive lenses, or includes a negative lens and two lenses closest to the image side are positive. Similar effects can be obtained with the lens configuration.

Further, regarding the ratio Δβ ₂ (= β _2T / β _2W ) of the second group wide angle end magnification β _2W and the telephoto end magnification β _2T when focusing on an object point at infinity and the focal length f ₂ of the second group, A zoom lens that satisfies the following conditions is preferable.

(5) 0.3 <log (Δβ ₂ ) / log (γ) <0.8
(6) 5 <γ <15
However, γ is a zoom ratio from the wide-angle end to the telephoto end of the entire system.

As described above, the group with the largest burden due to the wide angle and the high zoom ratio is the second group. Furthermore, the size of the diameter of the first group is determined by the power, movement amount, and configuration of the second group. Therefore, the zooming function is distributed to the rear group as much as possible. Condition (5) defines the ratio of the zoom ratio of the second group over the entire zoom range. When the upper limit of 0.8 is exceeded, the burden of the zooming function of the second group is too great, which hinders the correction of various off-axis aberrations and the reduction of the diameter of the first group. If the lower limit of 0.3 is exceeded, the burden on the rear group will increase, and spherical aberration and coma will not be stable over the entire zoom range, making it difficult to increase the diameter. Condition (6) is a zoom ratio range in which condition (5) is effective. Outside the range, the range of condition (5) is not appropriate. That is, when the upper limit of 15 of the condition (6) is exceeded, it is better to further reduce the zooming ratio of the second group beyond the range of the condition (5), while when the lower limit of 5 is exceeded, Even if the zoom ratio of the second lens group is further increased beyond the range of the condition (5), the influence of aberration is reduced, but on the other hand, the zoom ratio is not sufficient.

  The above conditions are more preferably as follows.

(5 ′) 0.35 <log (Δβ ₂ ) / log (γ) <0.65
(6 ') 9 <γ <15
Or
(5 ") 0.5 <log (Δβ ₂ ) / log (γ) <0.8
(6 ") 5 <γ <9
The eighth zoom lens of the present invention includes, in order from the object side, a first group having a positive refractive power that is movable along the optical axis at the time of zooming, and an optical axis at the time of zooming from the wide angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two closest to the image side being a configuration of a positive lens, and a second group in which any surface in the group is aspherical, and at least two movable sub lenses A zoom lens of a type including a rear group having a total of 6 or more and 11 or less lenses, or a positive refractive power movable along the optical axis at the time of zooming in order from the object side The first group and the second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. In any type of zoom lens and a rear lens group having a variable spacing when at least two zooming, the following condition is satisfied From the group of synthetic magnification beta _rW after upon focusing the wide-angle end infinite object point The zoom lens is characterized.

(7) −0.6 <β _rW <−0.1
As described above, when an image sensor with a small value of L (effective imaging surface diagonal length) or a field frame of film is used, the ratio of the focal length of the first group to the entire system becomes very large. This is because, for example, when a 135 mm format or APS format optical system is simply multiplied by a proportional coefficient, mechanical configuration and lens processing are physically impossible. Therefore, the focal length of each group, especially the first and second groups cannot be shortened. Therefore, the magnification of the rear group must be smaller than that of the large format optical system. If the lower limit of -0.6 of condition (7) is exceeded, the focal length of the first and second group synthesizing systems will be shortened, so the lens edge thickness, center thickness, and air space are extremely small. If this is to be ensured, the Petzval sum becomes negative, and at the same time, it is difficult to secure each off-axis aberration such as distortion, astigmatism, and coma over the entire zoom range. If the upper limit of −0.1 is exceeded, the lens system tends to be huge.

  The rear group is composed of three or more subgroups whose relative distances on the optical axis are variable, and further, as the three groups, positive refractive power and negative refractive power in order from the object side. It is good to comprise so that it may contain in order of positive refractive power.

  The rear group is composed of a plurality of subgroups whose relative distances on the optical axis are variable, and all movable subgroups in the rear group have at least one cemented lens component. It is good to do. Alternatively, the rear group is composed of three or more subgroups each having a variable relative distance on the optical axis, and all the movable subgroups in the rear group each have at least one cemented lens component. It may be configured as follows.

  The above conditions are more preferably as follows.

(6 ') 9 <γ <15
When,
(7 ′) −0.5 <β _rW <−0.1
Or
(6 ") 5 <γ <9
When,
(7 ") -0.6 <β _rW <-0.2
The ninth zoom lens of the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two closest to the image side being a configuration of a positive lens, and a second group in which any surface in the group is aspherical, and at least two movable sub lenses A zoom lens of a type including a rear group having a total of 6 or more and 11 or less lenses, or a positive refractive power movable along the optical axis at the time of zooming in order from the object side The first group and the second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. In any one of the zoom lenses including a rear group having a variable interval at the time of zooming, among the rear group, a positive sub that is closest to the object among sub groups having a negative magnification is used. The zoom is characterized by focusing on any subgroup on the image side of the lens group and satisfying the following condition with respect to the magnification β _RRW at the wide-angle end infinite object point of the most positive subgroup on the image side It is a lens.

(8) −0.4 <β _RRW <0.9
In the present invention, a system is employed in which focusing is performed by moving a part of the rear group on the optical axis. Regarding zooming, the second group and the rear group are in charge, but among the plurality of subgroups constituting the rear group, the actual contribution to zooming has a positive refractive power and a negative magnification. Only the most object-side subgroup is set, and the other subgroups are set to a value far from −1 and the focus is set to any one of those subgroups or a plurality of subgroups thereof. . In particular, focusing with the positive subgroup closest to the image side requires less aberration fluctuations due to focusing. Condition (8) stipulates the magnification β _RRW of the most image-side positive subgroup, but if the lower limit of −0.4 is exceeded, the variation in the amount of paraxial aberration and various aberrations due to focusing increases. It is not preferable. Exceeding the upper limit of 0.9 is not preferable because the amount of extension of the focus group becomes too large, and it is likely to interfere with the adjacent subgroup before focusing from an infinite object point to a close object point.

  If the focus group is the positive subgroup on the most image side in the rear group, or the negative subgroup on the object side, or both, the variation in various aberrations during focusing is small and the focus sensitivity is appropriate. It is preferable.

  The above conditions are more preferably as follows.

(8 ') -0.3 <β _RRW <0.8
Furthermore, the following is more preferable.

(8 ") -0.2 <β _RRW <0.7
The tenth zoom lens of the present invention includes, in order from the object side, a first group having a positive refractive power that is movable along the optical axis at the time of zooming, and an optical axis at the time of zooming from the wide angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two closest to the image side being a configuration of a positive lens, and a second group in which any surface in the group is aspherical, and at least two movable sub lenses A zoom lens of a type including a rear group having a total of 6 or more and 11 or less lenses, or a positive refractive power movable along the optical axis at the time of zooming in order from the object side A second lens unit having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end; And a zoom lens of a type including at least two rear groups having a variable interval at the time of zooming, from the wide-angle end to the telephoto end of the positive subgroup closest to the image side when focusing on an object point at infinity The zoom lens is characterized by satisfying the following condition with respect to the amount of movement Δz _{RR of the} lens and the amount of movement Δz _RF from the wide-angle end to the telephoto end of the positive subgroup on the most object side when focusing on an object point at infinity .

(9) −0.4 <Δz _RR / Δz _RF <0.8
(10) 0.3 <| Δz _RF | / L <4.0
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

Among the multiple subgroups constituting the rear group, the positive subgroup on the most object side actually contributes to zooming. Therefore, this group moves monotonously from the wide angle end to the telephoto end toward the object side. . The other subgroups have values far from the magnification of −1 ×, and are substantially moved or exist for correcting the shift of the focus position and the aberration correction due to the magnification change. On the other hand, when the positive subgroup closest to the image side moves to the object side more than necessary, the exit pupil position approaches the image plane, and shading is likely to occur when the electronic image sensor is used. If the upper limit of 0.8 of condition (9) is exceeded, the exit pupil approaches the image plane on the telephoto side, and the light incident angle on the periphery of the screen becomes too large. When the lower limit of −0.4 is exceeded, the total thickness of the rear group increases and the entire optical system becomes larger. If the upper limit of 4.0 of the condition (10) is exceeded, the total length of the optical system is increased or aberration fluctuations due to zooming are likely to increase. When the lower limit of 0.3 is exceeded, the first group diameter tends to increase. The same is true if at least one or more subgroups are provided between the two positive subgroups. In particular, when it is a negative subgroup, when the amount of movement from the wide-angle end to the telephoto end of the negative subgroup when focusing on an object point at infinity is Δz _RN ,
(11) -2 <Δz _RN / L <1
It is desirable to satisfy. If the lower limit value −2 of this condition is exceeded, the total thickness of the rear group increases and the entire optical system becomes larger. When the upper limit of 1 is exceeded, when rear focus is performed in any subgroup of the rear group, interference between the subgroups is likely to occur during short-distance focusing at the telephoto end. The same is true even if a negative subgroup is arranged closer to the object side than the two positive subgroups and closer to the image side than the second group.

  It is more preferable that the above conditions are individually or integrally as follows.

(9 ′) −0.3 <Δz _RR / Δz _RF <0.7
(10 ′) 0.5 <| Δz _RF | / L <3.5
(11 ′) −1.5 <Δz _RN /L<0.7
Further, it is more preferable that the following is performed individually or integrally as follows.

(9 ") -0.2 <Δz _RR / Δz _RF <0.6
(10 ") 0.7 <| Δz _RF | / L <3.0
(11 ") -1 <Δz _RN /L<0.5
The positive subgroup closest to the object side is more preferably a negative magnification in terms of the contribution of zooming.

The eleventh zoom lens according to the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide-angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two closest to the image side being a configuration of a positive lens, and a second group in which any surface in the group is aspherical, and at least two movable sub lenses And a rear group having a total of 6 to 11 lenses, and the rear group includes a sub-group having a positive refractive power and a negative magnification, and a positive group closest to the image side. A zoom lens that has a subgroup and whose relative position changes at the time of zooming, or in order from the object side, light at the time of zooming A second group having a positive refractive power that is movable along the optical axis, a second group having a negative refractive power that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end, A rear group having a subgroup, the rear group having a positive refractive power and a negative magnification, a positive subgroup on the most image side, and two positive subgroups In any of the zoom lenses having a negative subgroup between them and the relative positions of which change upon zooming, the two positive subgroups include a cemented lens component and an aspheric surface, and ν> 80 The zoom lens includes at least one lens using a glass material of (ν: Abbe number). Thereby, the chromatic aberration, spherical aberration, and coma aberration of each group can be taken, and a good image can be obtained from the wide-angle end to the telephoto end. It is more preferable that the negative subgroup in the middle of the two positive subgroups includes a cemented lens.

  The twelfth zoom lens of the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and an optical axis when zooming from the wide angle end to the telephoto end. And has at least three negative lenses, the most image side is a positive lens configuration, or the three most object side lenses are negative lenses, and the image side is positive. A configuration including a lens, or including a negative lens, the two lenses closest to the image side being a positive lens configuration, and a second group in which any surface in the group is an aspheric surface, and at least two movable positive lenses Zoom lens of the type including a rear group having a total of 7 to 11 lenses, or a positive refractive power movable along the optical axis at the time of zooming in order from the object side And a negative refractive power that moves to the image side along the optical axis when zooming from the wide-angle end to the telephoto end And two groups, a zoom lens having a negative refractive power in, the most object side of the rear group subgroups is any type of zoom lens and a rear lens group having a variable spacing when at least three zooming.

  In the zoom lens according to the present invention, when the optical path dividing member for the finder is inserted between the image side sub-group of the rear group and the imaging surface, a long back focus is required. Therefore, the Petzval sum tends to be negative when trying to forcibly secure the back focus. Accordingly, it is preferable to dispose the sub group of the negative lens system on the most object side of the rear group. Note that the negative subgroup closest to the object side in the rear group may be composed of one lens component. Further, it may be fixed near the diaphragm. Here, the lens component is a lens having no air space between the air contact surface on the object side and the image side, and means a single lens or a cemented lens.

  A negative subgroup and an aperture stop are arranged on the object side of the two positive subgroups and on the image side of the second group, and the distance between them is on the optical axis of the negative subgroup itself. It is preferable that it is within 3 times the thickness.

  Further, in the case where the most object side of the rear group is a negative refractive power group, it is preferable to use seven or more lenses in the entire rear group.

  The zoom lens according to the present invention includes, in order from the object side, a first group having a positive refractive power movable along the optical axis at the time of zooming, and a second group having a negative refractive power movable along the optical axis. In addition, it is desirable that the subsequent refractive power is made up of a variable rear group, and at least one of the following three conditions is satisfied.

(12) 2.0 <F _BW / f _W <5.0
(13) 1.4 <F _W <3.5
(14) 2 <ENP / L <5
Where F _BW is the back focus (air conversion length) when focusing on the infinite object point at the wide angle end, F _W is the minimum F value when focusing on the infinite object point at the wide angle end, and ENP is the entrance pupil position at the wide angle end.

The present invention is an effective invention for a lens system that satisfies one or more of these three conditions. In particular, the present invention is suitable for an image pickup apparatus using an electronic image pickup element. In particular, the pixel interval a is
1.0 × 10 ⁻⁴ × L <a <6.0 × 10 ⁻⁴ × L (mm)
When used as an imaging optical system of an imaging apparatus (camera, video movie, etc.) having a high-pixel imaging device, an imaging apparatus that effectively uses the high-pixel image quality can be achieved.

  Among the above inventions, zoom lenses, and specification conditions, two or more zoom lenses satisfying at the same time may be used. It is better to satisfy two or more of these inventions simultaneously. The more satisfied, the better.

  In any zoom lens type, the second group includes at least three negative lenses, and the most image side is a positive lens structure, or the most object side three lenses are negative lenses, and the image side is positive. It is preferable that a lens is included or a negative lens is included, and two lenses closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface. Further, if the rear group has a variable interval at the time of at least two magnifications, the rear group as a whole should have a configuration of 7 to 11 sheets. In particular, if the total number of rear groups is 7 or more and 9 or less and two aspheric surfaces are used, a configuration advantageous in size can be achieved while maintaining high imaging performance.

  Moreover, the effect is further increased by combining a plurality of the above-described configurations.

  As is apparent from the above description, according to the present invention, the TTL optical system is used for a camera having a small effective image pickup surface size such as a digital camera and having a diagonal field angle of 70 ° or more at the wide angle end of about 7 to 10 times. A bright wide-angle high-magnification zoom lens compatible with the finder and having an F value of about 2.0 to 2.8 at the wide-angle end can be realized.

1 is a lens cross-sectional view at a wide-angle end when focusing on an object point at infinity according to Embodiment 1 of a zoom lens of the present invention. FIG. 6 is a lens cross-sectional view similar to FIG. 1 of a zoom lens according to Embodiment 2. FIG. 5 is a lens cross-sectional view similar to FIG. FIG. 6 is a lens cross-sectional view similar to FIG. FIG. 6 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to a fifth exemplary embodiment. FIG. 10 is a lens cross-sectional view similar to FIG. FIG. 10 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to a seventh embodiment. FIG. 10 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to an eighth embodiment. FIG. 10 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 9; FIG. 12 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 10; FIG. 12 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 11; FIG. 12 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to a twelfth embodiment. FIG. 14 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 13; FIG. 16 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 14; FIG. 16 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 15; FIG. 16 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 16; FIG. 14 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 17; 14 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 18; FIG. 14 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 19; FIG. FIG. 22 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 20; FIG. 22 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 21; FIG. 22 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 22; FIG. 22 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 23. FIG. 22 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 24; FIG. 25 is a lens cross-sectional view similar to FIG. 1 illustrating a zoom lens according to Example 25. FIG. 6 is an aberration diagram for Example 1 upon focusing on an object point at infinity. FIG. 6 is an aberration diagram for Example 2 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 3 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 4 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 5 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 6 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 7 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 8 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 9 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 10 upon focusing on an object point at infinity. FIG. 10 is an aberration diagram for Example 11 upon focusing on an object point at infinity. FIG. 14 is an aberration diagram for Example 12 upon focusing on an object point at infinity. FIG. 14 is an aberration diagram for Example 13 upon focusing on an object point at infinity. FIG. 16 is an aberration diagram for Example 14 upon focusing on an object point at infinity. FIG. 18 is an aberration diagram for Example 15 upon focusing on an object point at infinity. FIG. 16 is an aberration diagram for Example 16 upon focusing on an object point at infinity. FIG. 18 is an aberration diagram for Example 17 upon focusing on an object point at infinity. FIG. 20 is an aberration diagram for Example 18 upon focusing on an object point at infinity. FIG. 27 is an aberration diagram for Example 19 upon focusing on an object point at infinity. FIG. 20 is an aberration diagram for Example 20 upon focusing on an object point at infinity. FIG. 25 is an aberration diagram for Example 21 upon focusing on an object point at infinity. FIG. 26 is an aberration diagram for Example 22 upon focusing on an object point at infinity. FIG. 27 is an aberration diagram for Example 23 upon focusing on an object point at infinity. FIG. 26 is an aberration diagram for Example 24 upon focusing on an object point at infinity. FIG. 26 is an aberration diagram for Example 25 upon focusing on an object point at infinity. It is a front perspective view which shows the external appearance of the digital camera incorporating the zoom lens by this invention. FIG. 52 is a rear perspective view of the digital camera of FIG. 51. It is sectional drawing of the digital camera of FIG. It is the front perspective view which opened the cover of the personal computer in which the zoom lens by this invention was integrated as an objective optical system. It is sectional drawing of the imaging optical system of a personal computer. It is a side view of the state of FIG. 1 is a front view, a side view, and a sectional view of a photographing optical system of a mobile phone in which a zoom lens according to the present invention is incorporated as an objective optical system.

  Examples 1 to 25 of the zoom lens according to the present invention will be described below. Lens cross-sectional views at the wide-angle end when focusing on an object point at infinity according to these embodiments are shown in FIGS. In each figure, the first group is G1, the second group is G2, the third group is G3, the fourth group is G4, the fifth group is G5, the sixth group is G6, a viewfinder optical path dividing prism (parallel plate), An optical low-pass filter provided with a near-infrared cut coat, a parallel plate group consisting of a CCD cover glass of an electronic image pickup device is indicated by P, an image plane is indicated by I, and the parallel plate group P is defined as a final group and an image plane. It is fixedly arranged between I. 1 to 25, the movement trajectory of each group from the wide-angle end to the telephoto end is schematically shown by arrows. The numerical data of each example will be described later.

As shown in FIG. 1, the zoom lens of Example 1 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. , The fifth group G5 having a negative refractive power and the sixth group G6 having a positive refractive power. When zooming from the wide angle end to the telephoto end when focusing on an object point at infinity,
The group G1 moves while drawing a convex reciprocating locus toward the image side, moves from the wide-angle end to the object side at the telephoto end, the second group G2 moves toward the image side, and the third group G3 opens toward the image side. The fourth group G4 moves to the object side, the fifth group G5 moves to the image side, and the sixth group G6 reduces the distance from the fifth group G5. It moves with a convex reciprocating locus on the side, and is slightly closer to the image side at the telephoto end than at the wide-angle end. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, for example, in order to focus from infinity to 0.3 m at the wide-angle end, the sixth group G6 is adjusted so that the distance between the fifth group G5 and the sixth group G6 is changed from 8.26323 mm to 8.10753 mm. In order to extend to the object side and focus from the object distance infinity to 1.284 m (magnification 1/20) at the telephoto end, the distance between the fifth group G5 and the sixth group G6 is changed from 5.08574 mm to 1.45116 mm. The sixth group G6 is extended to the object side.

  The first group G1 of Example 1 includes a negative meniscus lens having a convex surface facing the object side, a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 includes a biconcave lens, A biconcave lens formed by providing a thin resin layer on the object side and aspherical, a negative meniscus lens having a convex surface facing the image side, and a cemented lens having a positive meniscus lens having a convex surface facing the image side, The fourth group G4 includes a biconvex lens, a negative meniscus lens having a convex surface facing the object side, and a cemented lens of the biconvex lens. The fifth group G4 includes a negative meniscus lens having a convex surface facing the image side and a stop. G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side, and a sixth group G6 includes a biconvex lens, and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. Become. The aspheric surfaces are used for the three surfaces of the object side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

  As shown in FIG. 2, the zoom lens according to the second embodiment includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves while drawing a convex reciprocating locus toward the object side, and is closer to the image side at the telephoto end than the wide-angle end, and the sixth group G6 is The distance between the fifth lens group G5 and the fifth lens group G5 moves while drawing a convex reciprocating locus toward the object side so as to be slightly enlarged and then slightly enlarged, and at the telephoto end is slightly closer to the object side than the wide-angle end position. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 7.7998 mm when focusing at a short distance at the wide angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is set to 2.2730 mm.

  The first group G1 of Example 2 includes a negative meniscus lens having a convex surface facing the object side and two positive meniscus lenses having a convex surface facing the object side. The second group G2 includes a biconcave lens and a thin resin. The third lens group G3 is composed of a biconcave lens having an aspheric surface provided with a layer, a negative meniscus lens having a convex surface facing the image side, and a cemented lens having a positive meniscus lens having a convex surface facing the image side. The fourth group G4 is composed of a biconvex lens, a negative meniscus lens having a convex surface facing the object side, and a cemented lens of the biconvex lens, and the fifth group G5 The sixth lens unit G6 includes a biconvex lens, a positive meniscus lens having a convex surface facing the image side, and a negative meniscus having a convex surface facing the image side. Lens cemented lens Consisting of. The aspherical surfaces are used for the three surfaces of the image side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

As shown in FIG. 3, the zoom lens according to the third embodiment includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves while drawing a convex reciprocating locus toward the object side, and is slightly closer to the object side at the telephoto end than at the wide angle end. Moves along a convex reciprocating locus on the object side so that the distance from the fifth group G5 is once reduced and then slightly increased, and at the telephoto end slightly closer to the object side than the wide-angle end position. That. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 7.6726 mm when focusing at a short distance at the wide-angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is 3.1112 mm.

  The first group G1 of Example 3 includes a negative meniscus lens having a convex surface facing the object side and two positive meniscus lenses having a convex surface facing the object side. The second group G2 has a convex surface facing the object side. A negative meniscus lens, a biconcave lens, a positive meniscus lens having a convex surface facing the object side which is aspherical by providing a thin resin layer on the image side, and a positive meniscus lens having a convex surface facing the image side. The group G3 includes a negative meniscus lens having a convex surface facing the object side and a stop, and the fourth group G4 includes a biconvex lens, and a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side. The sixth group G6 includes a biconvex lens, a biconvex lens and a negative meniscus lens having a convex surface facing the image side. Such as cemented lenses It made. The aspheric surfaces are the image side surface of the resin layer of the positive meniscus lens having the convex surface facing the object side of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the image of the biconvex lens of the sixth group G6. It is used on three sides.

  As shown in FIG. 4, the zoom lens of Example 4 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a fixed aperture stop, a third group G3 having a positive refractive power, and a negative refractive power. The fourth group G4 and the fifth group G5 having positive refractive power, and when zooming from the wide angle end to the telephoto end when focusing on an object point at infinity, the first group G1 draws a reciprocating locus convex toward the image side. The second group G2 moves toward the image side, the third group G3 moves toward the object side, and the fourth group G4 protrudes toward the object side at the telephoto end. A reciprocating locus convex toward the object side so as to move while drawing a locus, slightly closer to the object side at the telephoto end than at the wide-angle end, and then the fifth group G5 to temporarily enlarge the distance from the fourth group G4 and then to slightly reduce it. The telephoto end is slightly closer to the object side than the wide-angle end. Then, the fifth group G5 is extended to the object side to focus on a subject at a short distance. Specifically, the distance between the fourth group G4 and the fifth group G5 is 3.0843 mm at the time of close focus at the wide angle end, and the distance between the fourth group G4 and the fifth group G5 at the close distance focus at the telephoto end. Is set to 2.2572 mm.

  The first group G1 of Example 4 includes a negative meniscus lens having a convex surface facing the object side and two positive meniscus lenses having a convex surface facing the object side. The second group G2 has a convex surface facing the object side. A negative meniscus lens, a biconcave lens, a cemented lens of a positive meniscus lens having a convex surface facing the image side and a biconcave lens, and a biconvex lens. The fourth group G4 includes a cemented lens of a positive meniscus lens having a convex surface facing the image side and a biconcave lens, and a fifth group G5. Consists of a biconvex lens and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspheric surfaces are used on the object side surface of the cemented lens of the second group G2, the object side surface of the biconvex lens of the third group G3, and the object side surface of the biconvex lens of the fifth group G5. .

As shown in FIG. 5, the zoom lens of Example 5 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a fixed aperture stop, a third group G3 having a positive refractive power, and a negative refractive power. The fourth lens group G4 and the fifth lens group G5 having positive refractive power, and when zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1
Moves while drawing a convex reciprocating locus toward the image side, and at the telephoto end, is moved closer to the object side than the wide-angle end position, the second group G2 is moved to the image side, the third group G3 is moved to the object side, The fourth group G4 moves while drawing a convex reciprocating locus toward the object side, is slightly closer to the object side at the telephoto end than the wide-angle end position, and the fifth group G5 temporarily enlarges the distance from the fourth group G4 and then slightly reduces it Move to the object side. Then, the fifth group G5 is extended to the object side to focus on a subject at a short distance. Specifically, the distance between the fourth lens group G4 and the fifth lens group G5 is 4.2063 mm when focusing at a short distance at the wide angle end, and the distance between the fourth lens group G4 and the fifth lens group G5 when focusing at a short distance at the telephoto end. Is 2.006 mm.

  The first group G1 of Example 5 includes a negative meniscus lens having a convex surface facing the object side and two positive meniscus lenses having a convex surface facing the object side. The second group G2 has a convex surface facing the object side. A negative meniscus lens, a biconcave lens, a cemented lens of a positive meniscus lens having a convex surface facing the image side and a biconcave lens, and a biconvex lens. The fourth group G4 includes a cemented lens of a positive meniscus lens having a convex surface facing the image side and a biconcave lens, and the fifth group G5 has a convex surface facing the object side. A negative meniscus lens facing the lens, a cemented lens having a positive meniscus lens with the convex surface facing the object side, a biconvex lens, and a positive meniscus lens facing the convex surface toward the object side. The aspherical surfaces are used on the object side surface of the cemented lens of the second group G2, the object side surface of the biconvex lens of the third group G3, and the image side surface of the biconvex lens of the fifth group G5. .

  As shown in FIG. 6, the zoom lens of Example 6 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating trajectory. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side. The fourth group G4 moves to the object side while reducing the distance from the second group G2, the fourth group G4 moves to the object side, and the fifth group G5 moves while drawing a convex reciprocating locus on the object side. The sixth group G6 moves along a convex reciprocating locus toward the object side while reducing the distance from the fifth group G5, and is slightly more at the telephoto end than at the wide-angle end. Made on the side. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth group G5 and the sixth group G6 is 7.9681 mm at the time of close focus at the wide angle end, and the distance between the fifth group G5 and the sixth group G6 at the close distance focus at the telephoto end. Is 1.7655 mm.

  The first group G1 of Example 6 includes a negative meniscus lens having a convex surface facing the object side, a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 includes a biconcave lens, A biconcave lens formed by providing a thin resin layer on the object side and aspherical, a negative meniscus lens having a convex surface facing the image side, and a cemented lens having a positive meniscus lens having a convex surface facing the image side, The fourth group G4 includes a biconvex lens, a negative meniscus lens having a convex surface facing the object side, and a cemented lens of the biconvex lens. The fifth group G4 includes a negative meniscus lens having a convex surface facing the image side and a stop. G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side, and a sixth group G6 includes a biconvex lens, and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. Become. The aspheric surfaces are used for the three surfaces of the object side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

As shown in FIG. 7, the zoom lens of Example 7 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating trajectory. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side. Moving to the image side while reducing the distance from the second group G2, the fourth group G4 moves to the object side, and the fifth group G5 and the sixth group G6 move together while drawing a convex reciprocating locus on the object side. At the telephoto end, however, it is slightly closer to the object side than the wide-angle end position. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth group G5 and the sixth group G6 is 7.4249 mm when focusing at a short distance at the wide angle end, and the distance between the fifth group G5 and the sixth group G6 when focusing at a short distance at the telephoto end. Is 3.9201 mm.

  The first group G1 of Example 7 includes a negative meniscus lens having a convex surface facing the object side, a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 has a convex surface facing the object side. A negative meniscus lens with a thin resin layer on the object side and aspherical, a negative meniscus lens with a convex surface on the image side, and a cemented lens with a positive meniscus lens with a convex surface on the image side The third group G3 is composed of a negative meniscus lens having a convex surface facing the image side and a stop, and the fourth group G4 is composed of a biconvex lens, a biconcave lens and a cemented lens of the biconvex lens, and the fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side. The sixth group G6 has a biconvex lens, a positive meniscus lens having a convex surface facing the image side, and a convex surface facing the image side. Negative meniscus lens And a cemented lens. The aspheric surfaces are used for the three surfaces of the object side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

  As shown in FIG. 8, the zoom lens of Example 8 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus, and at the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 is moved to the image side, and the third group G3 is integrally fixed with an aperture stop on the object side. The fourth group G4 moves to the object side, the fifth group G5 is fixed, and the sixth group G6 moves to the object side. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth group G5 and the sixth group G6 is 8.5198 mm when focusing at a short distance at the wide angle end, and the distance between the fifth group G5 and the sixth group G6 when focusing at a short distance at the telephoto end. Is 1.3741 mm.

  The first group G1 of Example 8 includes a negative meniscus lens having a convex surface facing the object side, a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 includes a biconcave lens, It consists of a biconcave lens with a thin resin layer on the object side and aspherical surface, and a cemented lens made up of a biconcave lens and a biconvex lens. The third group G3 consists of a diaphragm and a negative meniscus lens with a convex surface facing the image side. The fourth group G4 includes a positive meniscus lens having a convex surface facing the object side, a negative meniscus lens having a convex surface facing the object side, and a cemented lens of a biconvex lens. The fifth group G5 includes a biconcave lens and the object side. The sixth group G6 includes a biconvex lens, and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspheric surfaces are used for the three surfaces of the object side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

  As shown in FIG. 9, the zoom lens of Example 9 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a fixed aperture stop, a third group G3 having a positive refractive power, and a positive refractive power. 4th lens group G4, and at the time of focusing on an object point at infinity, when zooming from the wide-angle end to the telephoto end, the first group G1 moves while drawing a convex reciprocating locus toward the image side, and at the telephoto end the wide-angle end The second group G2 moves to the image side, the third group G3 moves to the object side, and the fourth group G4 moves to the object side while increasing the distance from the third group G3. To do. The fourth group G4 is extended to the object side to focus on a subject at a short distance. Specifically, the distance between the third lens group G3 and the fourth lens group G4 is 1.3397 mm when focusing at a short distance at the wide-angle end, and the distance between the third lens group G3 and the fourth lens group G4 when focusing at a short distance at the telephoto end. Is 15.0854 mm.

  The first group G1 of Example 9 includes a negative meniscus lens having a convex surface facing the object side, a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 has a convex surface facing the object side. A negative meniscus lens facing the lens, a biconcave lens with a thin resin layer on the image side that is aspherical, and a cemented lens of a negative meniscus lens with a convex surface facing the object and a biconvex lens, with a fixed stop The third group G3 includes a positive meniscus lens having a convex surface facing the object side, and a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fourth group G4 includes a biconvex lens and a biconcave lens. A cemented lens, a positive meniscus lens having a convex surface facing the image side, and a cemented lens of a biconvex lens and a biconcave lens. The aspherical surfaces are three surfaces: the image side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the positive meniscus lens of the third group G3, and the object side surface of the positive meniscus lens of the fourth group G4. It is used for.

  As shown in FIG. 10, the zoom lens of Example 10 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves while drawing a convex reciprocating locus toward the object side, and is closer to the image side at the telephoto end than the wide-angle end, and the sixth group G6 is While moving away from the fifth lens group G5 while drawing a convex reciprocating locus toward the object side, the telephoto end is slightly closer to the image side than the wide-angle end. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 8.1246 mm when focusing at a short distance at the wide angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is 2.3175 mm.

  The first group G1 of Example 10 includes a negative meniscus lens having a convex surface facing the object side, a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 includes a thin resin layer. An aspheric birefringent lens provided on the image side, a biconcave lens, a negative meniscus lens having a convex surface facing the image side, and two biconvex lenses. The third group G3 has a negative surface with the convex surface facing the image side. The fourth group G4 includes a biconvex lens, a negative meniscus lens having a convex surface facing the object side, and a cemented lens of the biconvex lens. The fifth group G5 includes a biconcave lens and an object side. The sixth group G6 includes a biconvex lens, and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspherical surfaces are used for the three surfaces of the image side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

  As shown in FIG. 11, the zoom lens of Example 11 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves to the object side, the fifth group G5 moves while drawing a convex reciprocating locus on the object side, and moves from the wide-angle end position to the object side at the telephoto end, and the sixth group G6 It moves with a convex reciprocating locus on the object side so that the distance from the fifth group G5 is once reduced and then slightly enlarged, and at the telephoto end, it is slightly closer to the object side than the wide-angle end position. That. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth group G5 and the sixth group G6 is 6.6911 mm at the time of close focus at the wide angle end, and the distance between the fifth group G5 and the sixth group G6 at the close distance focus at the telephoto end. Is set to 3.0700 mm.

The first group G1 of Example 11 includes a negative meniscus lens having a convex surface facing the object side, and two positive meniscus lenses having a convex surface facing the object side. The second group G2 has the convex surface facing the object side. A negative meniscus lens, two biconcave lenses, and a biconvex lens. The third group G3 is composed of a negative meniscus lens having a convex surface facing the object side and an aperture, and the fourth group G4 is a biconvex lens. The fifth group G5 is composed of a negative meniscus lens having a convex surface facing the object side and a cemented lens of a biconvex lens. The fifth group G5 is composed of a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side. Consists of a biconvex lens and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspherical surfaces are used for the three surfaces of the image side surface of the biconvex lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the image side surface of the biconvex lens of the sixth group G6. .

  As shown in FIG. 12, the zoom lens of Example 12 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves to the object side, the fifth group G5 moves while drawing a convex reciprocating locus on the object side, and moves from the wide-angle end position to the object side at the telephoto end, and the sixth group G6 It moves with a convex reciprocating locus on the object side so that the distance from the fifth group G5 is once reduced and then slightly enlarged, and at the telephoto end, it is slightly closer to the object side than the wide-angle end position. That. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth group G5 and the sixth group G6 is 6.0167 mm when focusing at a short distance at the wide angle end, and the distance between the fifth group G5 and the sixth group G6 when focusing at a short distance at the telephoto end. Is 2.1156 mm.

  The first group G1 of Example 12 includes a negative meniscus lens having a convex surface facing the object side, and two positive meniscus lenses having a convex surface facing the object side. The second group G2 has the convex surface facing the object side. A negative meniscus lens, two biconcave lenses, and a biconvex lens. The third group G3 is composed of a biconcave lens and an aperture. The fourth group G4 has a biconvex lens and a convex surface facing the object side. The fifth group G5 includes a cemented lens of a negative meniscus lens and a positive meniscus lens having a convex surface facing the object side. The fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface directed toward the object side. Consists of a biconvex lens and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspherical surface is used for the three surfaces of the object side surface of the second biconcave lens in the second group G2, the object side surface of the biconvex lens in the fourth group G4, and the image side surface of the biconvex lens in the sixth group G6. It has been.

  As shown in FIG. 13, the zoom lens of Example 13 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a positive refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus, and at the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 is moved to the image side, and the third group G3 is integrally fixed with an aperture stop on the object side. The fourth group G4 moves to the object side, the fifth group G5 moves while drawing a convex reciprocating locus on the object side, and moves from the wide-angle end position to the object side at the telephoto end, and the sixth group G6 It moves to the object side while reducing the interval with the fifth group G5. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 7.3354 mm when focusing at a short distance at the wide angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is set to 1.7386 mm.

The first group G1 of Example 13 includes a negative meniscus lens having a convex surface directed toward the object side and two positive meniscus lenses having a convex surface directed toward the object side. The second group G2 has a convex surface directed toward the object side. A negative meniscus lens, a biconcave lens, a biconcave lens having a thin resin layer provided on the object side and made aspherical, and a biconvex lens. The third group G3 includes a diaphragm and a biconvex lens. G4 includes a biconvex lens, and a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side. The sixth group G6 includes a biconvex lens, and a cemented lens of a positive meniscus lens having a convex surface facing the image side and a negative meniscus lens having a convex surface facing the image side. The aspheric surfaces are used for the three surfaces of the object side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

  As shown in FIG. 14, the zoom lens of Example 14 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a fixed aperture stop, a third group G3 having a positive refractive power, and a negative refractive power. The fourth group G4 and the fifth group G5 having positive refractive power, and when zooming from the wide angle end to the telephoto end when focusing on an object point at infinity, the first group G1 draws a reciprocating locus convex toward the image side. The second lens group G2 moves to the image side, the third lens group G3 moves to the object side, the fourth lens group G4 moves to the object side, The fifth group G5 moves to the object side while reducing the distance from the fourth group G4. Then, the fifth group G5 is extended to the object side to focus on a subject at a short distance. Specifically, the distance between the fourth lens group G4 and the fifth lens group G5 is 7.5416 mm when focusing at a short distance at the wide angle end, and the distance between the fourth lens group G4 and the fifth lens group G5 when focusing at a short distance at the telephoto end. Is 0.5503 mm.

  The first group G1 of Example 14 includes a negative meniscus lens having a convex surface directed toward the object side and two positive meniscus lenses having a convex surface directed toward the object side. The second group G2 has a convex surface directed toward the object side. A negative meniscus lens, a biconcave lens, a cemented lens of a biconcave lens and a negative meniscus lens having a convex surface facing the object side, and a biconvex lens. The fourth group G4 includes a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fourth group G4 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface directed to the object side. Consists of a biconvex lens, a cemented lens of a positive meniscus lens having a convex surface facing the image side and a negative meniscus lens having a convex surface facing the image side. The aspheric surfaces are used on the object side surface of the cemented lens of the second group G2, the object side surface of the biconvex lens of the third group G3, and the object side surface of the biconvex lens of the fifth group G5. .

  As shown in FIG. 15, the zoom lens of Example 15 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a fixed aperture stop, a third group G3 having a positive refractive power, and a negative refractive power. The fourth group G4 and the fifth group G5 having positive refractive power, and when zooming from the wide angle end to the telephoto end when focusing on an object point at infinity, the first group G1 draws a reciprocating locus convex toward the image side. The second lens group G2 moves to the image side, the third lens group G3 moves to the object side, the fourth lens group G4 moves to the object side, The fifth group G5 moves to the object side while reducing the distance from the fourth group G4. Then, the fifth group G5 is extended to the object side to focus on a subject at a short distance. Specifically, the distance between the fourth lens group G4 and the fifth lens group G5 is 7.8923 mm when focusing at a short distance at the wide angle end, and the distance between the fourth lens group G4 and the fifth lens group G5 when focusing at a short distance at the telephoto end. Is set to 2.3128 mm.

  The first group G1 of Example 15 includes a negative meniscus lens having a convex surface facing the object side and two positive meniscus lenses having a convex surface facing the object side. The second group G2 has the convex surface facing the object side. A negative meniscus lens, a biconcave lens, a biconcave lens with a thin resin layer provided on the object side and made aspherical, and a biconvex lens. The third lens unit G3 includes a biconvex lens, The fourth group G4 is composed of a biconcave lens and a cemented lens of a positive meniscus lens having a convex surface toward the object side, and the fifth group G5 is composed of a negative meniscus lens having a convex surface facing the side and a biconvex lens. It consists of a biconvex lens, a negative meniscus lens having a convex surface facing the object side, and a cemented lens of the biconvex lens. The aspherical surfaces are used for the three surfaces of the object side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the third group G3, and the object side surface of the biconvex lens of the fifth group G5. It has been.

  As shown in FIG. 16, the zoom lens of Example 16 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves to the object side, the fifth group G5 moves while drawing a convex reciprocating locus on the object side, and moves from the wide-angle end position to the object side at the telephoto end, and the sixth group G6 It moves with a convex reciprocating locus on the object side so that the distance from the fifth group G5 is once reduced and then slightly enlarged, and at the telephoto end, it is slightly closer to the object side than the wide-angle end position. That. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 7.6961 mm when focusing at a short distance at the wide-angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is 3.0968 mm.

  The first group G1 of Example 16 includes a negative meniscus lens having a convex surface directed toward the object side, and two positive meniscus lenses having a convex surface directed toward the object side. The second group G2 has a convex surface directed toward the object side. A negative meniscus lens, a biconcave lens, a biconvex lens, and a negative meniscus lens having a convex surface facing the image side. The third group G3 includes a biconcave lens and an aperture. The fourth group G4 includes both The fifth lens unit G5 is composed of a cemented lens composed of a convex lens, a negative meniscus lens having a convex surface directed toward the object side, and a biconvex lens, and a cemented lens composed of a biconcave lens and a positive meniscus lens having a convex surface directed toward the object side. The group G6 includes a biconvex lens, and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspherical surfaces are used on the object side surface of the biconcave lens in the second group G2, the object side surface of the biconvex lens in the fourth group G4, and the image side surface of the biconvex lens in the sixth group G6. .

  As shown in FIG. 17, the zoom lens of Example 17 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves to the object side, the fifth group G5 moves while drawing a convex reciprocating locus on the object side, and moves from the wide-angle end position to the object side at the telephoto end, and the sixth group G6 It moves with a convex reciprocating locus on the object side so that the distance from the fifth group G5 is once reduced and then slightly enlarged, and at the telephoto end, it is slightly closer to the object side than the wide-angle end position. That. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth group G5 and the sixth group G6 is 6.0079 mm at the time of close focus at the wide angle end, and the distance between the fifth group G5 and the sixth group G6 at the close distance focus at the telephoto end. Is 2.6039 mm.

  The first group G1 of Example 17 includes a negative meniscus lens having a convex surface facing the object side and two positive meniscus lenses having a convex surface facing the object side. The second group G2 has the convex surface facing the object side. A negative meniscus lens, two biconcave lenses, and a biconvex lens. The third group G3 includes a biconcave lens, a cemented lens of a positive meniscus lens having a convex surface facing the object side, and a stop. G4 includes a biconvex lens, and a cemented lens of 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 fifth group G5 has a convex surface facing the biconcave lens and the object side. The sixth lens unit G6 is composed of a biconvex lens, a biconvex lens, and a negative meniscus lens cemented lens with the convex surface facing the image side. The aspherical surface is used for three surfaces, that is, the object side surface of the second biconcave lens in the second group G2, the object side surface of the biconvex lens in the fourth group G4, and the image side surface of the biconvex lens in the sixth group G6. ing.

As shown in FIG. 18, the zoom lens of Example 18 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. , Negative refractive power fifth group G5,
The sixth lens unit G6 having positive refractive power, and when zooming from the wide-angle end to the telephoto end at the time of focusing on an object point at infinity, the first lens unit G1 moves while drawing a convex reciprocating locus toward the image side. , The second lens group G2 moves to the image side from the position at the wide-angle end, the third lens group G3 has an aperture stop integrally on the image side and is fixed, and the fourth lens group G4 is on the object side. The fifth group G5 moves while drawing a convex reciprocating locus toward the object side, and moves closer to the object side at the telephoto end than at the wide-angle end. The sixth group G6 temporarily reduces the distance from the fifth group G5. After that, it moves with a convex reciprocating locus toward the object side so as to enlarge slightly, and at the telephoto end is slightly closer to the object side than the wide-angle end position. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 6.0177 mm when focusing at a short distance at the wide angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is 2.2983 mm.

  The first group G1 in Example 18 includes a negative meniscus lens having a convex surface directed toward the object side, and two positive meniscus lenses having a convex surface directed toward the object side. The second group G2 has the convex surface directed toward the object side. A negative meniscus lens, two biconcave lenses, and a biconvex lens. The third group G3 includes a plano-concave lens and a diaphragm. The fourth group G4 has a biconvex lens and a convex surface facing the object side. The fifth group G5 includes a cemented lens of a negative meniscus lens and a positive meniscus lens having a convex surface facing the object side. The fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface directed toward the object side. Consists of a biconvex lens and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspheric surfaces are the object side surface of the second biconcave lens in the second group G2, the image side surface of the plano-concave lens in the third group G3, the object side surface of the biconvex lens in the fourth group G4, and the sixth group G6. Are used for four surfaces on the image side of the biconvex lens.

  As shown in FIG. 19, the zoom lens of Example 19 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a fixed aperture stop, a third group G3 having a positive refractive power, and a positive refractive power. 4th lens group G4, and at the time of focusing on an object point at infinity, when zooming from the wide-angle end to the telephoto end, the first group G1 moves while drawing a convex reciprocating locus toward the image side, and at the telephoto end the wide-angle end The second group G2 moves to the image side, the third group G3 moves to the object side, and the fourth group G4 moves to the object side while increasing the distance from the third group G3. To do. The fourth group G4 is extended to the object side to focus on a subject at a short distance.

  The first group G1 of Example 19 is composed of a negative meniscus lens having a convex surface facing the object side and a cemented lens of a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 is composed of the object side The third group G3 includes a biconvex lens, a positive meniscus lens having a convex surface facing the object side, and a fixed diaphragm. The fourth group G4 includes a positive meniscus lens having a convex surface facing the object side, and a negative meniscus lens having a convex surface facing the object side and a biconvex lens. It consists of a lens. The aspherical surfaces are used for the image side surface of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the third group G3, and the most image side surface of the fourth group G4. As shown in FIG. 20, the zoom lens of Example 20 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a fixed aperture stop, a third group G3 having a positive refractive power, and a negative refractive power. The fourth group G4 and the fifth group G5 having positive refractive power, and when zooming from the wide angle end to the telephoto end when focusing on an object point at infinity, the first group G1 draws a reciprocating locus convex toward the image side. The second lens group G2 moves to the image side, the third lens group G3 moves to the object side, and the fourth lens group G4 moves to the third lens group G4. The fifth group G5 moves to the object side so as to temporarily reduce the distance from the fourth group G4 and then slightly increase the distance. Then, the fifth group G5 is extended to the object side to focus on a subject at a short distance.

The first group G1 of Example 20 includes a cemented lens of a negative meniscus lens having a convex surface directed toward the object side and a biconvex lens, and a positive meniscus lens having a convex surface directed toward the object side. The second group G2 includes an object side A negative meniscus lens having a convex surface facing the lens, a biconcave lens, a negative meniscus lens having a convex surface facing the object side, and a cemented lens of the biconvex lens. The fourth group G4 is composed of a cemented lens of a positive meniscus lens having a convex surface facing the image side and a biconcave lens, and the fifth group G5 is composed of a biconcave lens and a biconvex lens. It consists of a cemented lens and a biconvex lens. The aspherical surface is used for the three surfaces of the image side surface of the negative meniscus lens of the second group G2, the most object side surface of the cemented lens of the third group G3, and the most image side surface of the cemented lens of the fifth group G5. It has been.

  As shown in FIG. 21, the zoom lens of Example 21 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the image side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the object side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves toward the object side so as to increase the distance from the fourth group G4, and the sixth group G6 increases the distance from the fifth group G5. It moves to the object side to enlarge slightly and then reduce slightly. The sixth group G6 is extended toward the object side to focus on a subject at a short distance.

  The first group G1 of Example 21 is composed of a negative meniscus lens having a convex surface facing the object side and a cemented lens of a biconvex lens, and a positive meniscus lens having a convex surface facing the object side. The second group G2 is composed of the object side A negative meniscus lens having a convex surface facing the lens, two biconcave lenses, and a biconvex lens. The third group G3 includes a stop and a negative meniscus lens having a convex surface facing the image side. And a positive meniscus lens having a convex surface facing the object side, and a cemented lens of a biconvex lens and a biconcave lens. The fifth group G5 has a positive meniscus lens having a convex surface facing the object side and a negative meniscus having the convex surface facing the object side. The sixth group G6 includes a biconvex lens, a negative meniscus lens having a convex surface facing the image side, and a biconvex lens cemented lens. The aspherical surface is used for three surfaces: the image side surface of the negative meniscus lens of the second group G2, the most object side surface of the cemented lens of the fourth group G4, and the image side surface of the biconvex lens of the sixth group G6. ing.

  As shown in FIG. 22, the zoom lens of Example 22 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves toward the image side, and the sixth group G6 draws a reciprocating locus convex toward the object side while reducing the distance from the fifth group G5. At the telephoto end, it is slightly closer to the object side than the wide-angle end. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 10.6679 mm when focusing at a short distance at the wide-angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is 1.0776 mm.

The first group G1 of Example 22 includes a negative meniscus lens having a convex surface directed toward the object side, a biconvex lens, and a positive meniscus lens having a convex surface directed toward the object side. The second group G2 includes a convex surface facing the object side. A negative meniscus lens with a thin resin layer on the object side and aspherical, a negative meniscus lens with a convex surface on the image side, and a cemented lens with a positive meniscus lens with a convex surface on the image side The third group G3 includes a negative meniscus lens having a convex surface facing the image side and a stop. The fourth group G4 includes a biconvex lens, and a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fifth group G5 is composed of a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side, and the sixth group G6 has a biconvex lens, a biconvex lens and a convex surface facing the image side Negative meniscus Consisting of a's of the cemented lens. The aspheric surfaces are used for the three surfaces of the object side surface of the resin layer of the biconcave lens of the second group G2, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. It has been.

  As shown in FIG. 23, the zoom lens of Example 23 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves toward the image side, and the sixth group G6 draws a reciprocating locus convex toward the object side while reducing the distance from the fifth group G5. At the telephoto end, it is slightly closer to the object side than the wide-angle end. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth group G5 and the sixth group G6 is 9.3998 mm when focusing at a short distance at the wide angle end, and the distance between the fifth group G5 and the sixth group G6 when focusing at a short distance at the telephoto end. Is set to 0.9516 mm.

  The first group G1 of Example 23 includes a negative meniscus lens having a convex surface directed toward the object side, and two positive meniscus lenses having a convex surface directed toward the object side. The second group G2 has the convex surface directed toward the object side. A negative meniscus lens having a convex surface facing the image side, a negative meniscus lens having a convex surface facing the image side, and a cemented lens of a positive meniscus lens having a convex surface facing the image side. Is composed of a negative meniscus lens having a convex surface facing the image side and a stop, and the fourth group G4 is composed of a biconvex lens, and a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side. The sixth group G6 includes a biconvex lens, and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface directed to the image side. And It made. The aspherical surface is an object side surface of a negative meniscus lens having a convex surface facing the image side of the second group G2, an object side surface of the biconvex lens of the fourth group G4, and an object side surface of the biconvex lens of the sixth group G6. Are used on the three sides.

  As shown in FIG. 24, the zoom lens of Example 24 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves toward the image side, and the sixth group G6 draws a reciprocating locus convex toward the object side while reducing the distance from the fifth group G5. And at the telephoto end is slightly closer to the object side than the wide-angle end. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 9.7471 mm when focusing at a short distance at the wide angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is 0.8531 mm.

  The first group G1 of Example 24 includes a negative meniscus lens having a convex surface directed toward the object side, a biconvex lens, and a positive meniscus lens having a convex surface directed toward the object side. The second group G2 includes a convex surface facing the object side. A negative meniscus lens having a convex surface facing the image side, a negative meniscus lens having a convex surface facing the image side, and a cemented lens of a positive meniscus lens having a convex surface facing the image side. The group G3 includes a negative meniscus lens having a convex surface facing the image side and a stop, and the fourth group G4 includes a biconvex lens, and a cemented lens of the negative meniscus lens having a convex surface facing the object side and the biconvex lens. The fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side. The sixth group G6 includes a biconvex lens, a biconvex lens and a negative meniscus lens having a convex surface facing the image side. Joining Consisting of a lens. The aspherical surface is an image side surface of a negative meniscus lens having a convex surface facing the image side of the second group G2, an object side surface of the biconvex lens of the fourth group G4, and an object side surface of the biconvex lens of the sixth group G6. Are used on the three sides.

  As shown in FIG. 25, the zoom lens of Example 25 includes a first group G1 having a positive refractive power, a second group G2 having a negative refractive power, a third group G3 having a negative refractive power, and a fourth group G4 having a positive refractive power. The first group G1 has a negative refractive power fifth group G5 and a positive refractive power sixth group G6. When zooming from the wide-angle end to the telephoto end when focusing on an object point at infinity, the first group G1 is convex toward the image side. It moves while drawing a reciprocating locus. At the telephoto end, it is closer to the object side than the wide-angle end position, the second group G2 moves to the image side, and the third group G3 has an aperture stop integrally on the image side and is fixed. The fourth group G4 moves toward the object side, the fifth group G5 moves toward the image side, and the sixth group G6 draws a reciprocating locus convex toward the object side while reducing the distance from the fifth group G5. And at the telephoto end is slightly closer to the image side than the wide-angle end. The sixth group G6 is extended toward the object side to focus on a subject at a short distance. Specifically, the distance between the fifth lens group G5 and the sixth lens group G6 is 7.9914 mm when focusing at a short distance at the wide angle end, and the distance between the fifth lens group G5 and the sixth lens group G6 when focusing at a short distance at the telephoto end. Is 1.4726 mm.

  The first group G1 of Example 25 includes a negative meniscus lens having a convex surface directed toward the object side, a biconvex lens, and a positive meniscus lens having a convex surface directed toward the object side. The second group G2 includes a convex surface facing the object side. A negative meniscus lens having a convex surface, a biconcave lens, and a cemented lens of a biconcave lens and a biconvex lens. The third group G3 includes a negative meniscus lens having a convex surface directed to the image side, and a diaphragm. G4 includes a biconvex lens, and a cemented lens of a negative meniscus lens having a convex surface facing the object side and a biconvex lens. The fifth group G5 includes a cemented lens of a biconcave lens and a positive meniscus lens having a convex surface facing the object side. Thus, the sixth group G6 includes a biconvex lens, and a cemented lens of a biconvex lens and a negative meniscus lens having a convex surface facing the image side. The aspherical surfaces are used for the three surfaces of the cemented lens of the second group G2, the most image side surface, the object side surface of the biconvex lens of the fourth group G4, and the object side surface of the biconvex lens of the sixth group G6. Yes.

  In the above embodiment, the amount of feeding at the time of focusing may be made larger than that of the specific example so that focusing can be performed at a closer distance.

In the following, the numerical data of each of the above embodiments is shown. Symbols are the above, f is the total focal length, ω is the half field angle, _FNO is the F number, W is the wide angle end, and WS is the wide angle end. Intermediate state (geometric mean of wide angle end and standard state), S is standard state, ST is intermediate state of standard state and telephoto end (geometric mean of standard state and telephoto end), T is telephoto end, r ₁ , r ₂ ... Is the radius of curvature of each lens surface, d ₁ , d ₂ ... _Are the distances between the lens surfaces, n _d1 , n _d2 ... _Are the refractive indices of the d-line of each lens, and ν _d1 , ν _d2 . Abbe number. 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 = (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
Here, r is a paraxial radius of curvature, K is a conical coefficient, and A ₄ , A ₆ , A ₈ , and A ₁₀ are fourth-order, sixth-order, eighth-order, and tenth-order aspherical coefficients, respectively.

Example 1
r ₁ = 144.6796 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 82.7855 d ₂ = 0.2000
r ₃ = 86.4734 d ₃ = 6.6250 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -587.8788 d ₄ = 0.2000
r ₅ = 67.2317 d ₅ = 4.9655 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 245.5595 d ₆ = (variable)
r ₇ = -2.080 × 10 ⁴ d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 17.9014 d ₈ = 8.5657
r ₉ = -66.4539 (aspherical surface) d ₉ = 0.2000 n _d5 = 1.53508 ν _d5 = 40.94
r ₁₀ = -145.6382 d ₁₀ = 1.3000 n _d6 = 1.77250 ν _d6 = 49.60
r ₁₁ = 275.5575 d ₁₁ = 4.1902
r ₁₂ = -23.6269 d ₁₂ = 1.1790 n _d7 = 1.48749 ν _d7 = 70.23
r ₁₃ = -120.2094 d ₁₃ = 4.4826 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₄ = -36.0216 d ₁₄ = (variable)
r ₁₅ = -13.3441 d ₁₅ = 1.3000 n _d9 = 1.77250 ν _d9 = 49.60
r ₁₆ = -14.7782 d ₁₆ = 1.0476
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 22.2411 (aspherical surface) d ₁₈ = 5.1519 n _d10 = 1.49700 ν _d10 = 81.54
r ₁₉ = -44.3261 d ₁₉ = 0.1026
r ₂₀ = 66.0894 d ₂₀ = 1.1010 n _d11 = 1.80610 ν _d11 = 40.92
r ₂₁ = 17.8460 d ₂₁ = 5.1279 n _d12 = 1.49700 ν _d12 = 81.54
r ₂₂ = -87.9421 d ₂₂ = (variable)
r ₂₃ = -55.9458 d ₂₃ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₄ = 13.4125 d ₂₄ = 3.2354 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₅ = 19.3681 d ₂₅ = (variable)
r ₂₆ = 26.8826 (aspherical surface) d ₂₆ = 4.2125 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₇ = -27.8744 d ₂₇ = 0.1500
r ₂₈ = 279.7814 d ₂₈ = 4.1538 n _d16 = 1.61800 ν _d16 = 63.33
r ₂₉ = -15.8089 d ₂₉ = 1.0000 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₀ = -57.4983 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = 2.1263 × 10 ^-5
A ₆ = 1.5727 × 10 ^-8
A ₈ = 3.9610 × 10 ^-11
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -1.9875 × 10 ^-5
A ₆ = -1.3029 × 10 ^-8
A ₈ = 5.1888 × 10 ^-11
A ₁₀ = 0.0000
26th face K = 0
A ₄ = -1.7061 × 10 ^-5
A ₆ = -8.7539 × 10 ^-9
A ₈ = 1.1345 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.26000 12.99999 23.29997 41.72984 74.74939
F _NO 2.8000 3.3795 3.5000 3.5000 3.5000
ω (°) 38.45. 13.04. 4.12
d ₆ 1.68869 10.56701 29.85764 47.13961 57.82811
d ₁₄ 44.76569 23.28314 12.25974 6.30842 2.57394
d ₁₇ 19.00232 11.35026 8.66100 6.27017 0.99971
d ₂₂ 1.50000 7.83915 11.97947 16.04050 22.86634
d ₂₅ 8.26323 8.96815 6.46694 5.08222 5.08574
d ₃₀ 4.69246 5.30046 6.35060 6.06512 4.50622
.

(Example 2)
r ₁ = 82.4483 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 57.4502 d ₂ = 0.1000
r ₃ = 57.9164 d ₃ = 7.1329 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 284.4315 d ₄ = 0.2000
r ₅ = 69.2991 d ₅ = 5.3163 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 400.4019 d ₆ = (variable)
r ₇ = -1559.7350 d ₇ = 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 18.3563 d ₈ = 8.8487
r ₉ = -51.0656 d ₉ = 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 89.9326 d ₁₀ = 0.2000 n _d6 = 1.53508 ν _d6 = 40.94
r ₁₁ = 56.6440 (aspherical surface) d ₁₁ = 2.9409
r ₁₂ = -70.2481 d ₁₂ = 1.1135 n _d7 = 1.48749 ν _d7 = 70.23
r ₁₃ = -351.6349 d ₁₃ = 3.8722 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₄ = -41.4750 d ₁₄ = (variable)
r ₁₅ = -21.7766 d ₁₅ = 1.0673 n _d9 = 1.69680 ν _d9 = 55.53
r ₁₆ = -24.1145 d ₁₆ = 1.4225
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 21.1358 (aspherical surface) d ₁₈ = 5.4704 n _d10 = 1.49700 ν _d10 = 81.54
r ₁₉ = -79.1895 d ₁₉ = 0.1774
r ₂₀ = 47.1634 d ₂₀ = 1.1410 n _d11 = 1.80440 ν _d11 = 39.59
r ₂₁ = 15.0512 d ₂₁ = 3.4835 n _d12 = 1.61800 ν _d12 = 63.33
r ₂₂ = -184.9380 d ₂₂ = (variable)
r ₂₃ = -74.7571 d ₂₃ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₄ = 11.7718 d ₂₄ = 1.9155 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₅ = 17.1123 d ₂₅ = (variable)
r ₂₆ = 37.8693 (aspherical surface) d ₂₆ = 3.4588 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₇ = -21.7737 d ₂₇ = 0.1500
r ₂₈ = -131.6293 d ₂₈ = 3.7575 n _d16 = 1.61800 ν _d16 = 63.33
r ₂₉ = -12.5491 d ₂₉ = 1.0000 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₀ = -38.2936 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = -2.3956 × 10 ^-5
A ₆ = 1.1363 × 10 ^-8
A ₈ = -2.9304 × 10 ^-11
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -1.9310 × 10 ^-5
A ₆ = -5.6603 × 10 ^-9
A ₈ = -5.6829 × 10 ^-11
A ₁₀ = 0.0000
26th face K = 0
A ₄ = -1.9084 × 10 ^-5
A ₆ = 8.1108 × 10 ^-9
A ₈ = 2.2527 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.2599 12.99998 23.29994 41.72977 74.74923
F _NO 2.8000 3.0773 3.4040 3.5000 3.5000
ω (°) 38.47. 13.05. 4.09
d ₆ 2.04129 12.03456 30.35700 47.31707 58.11117
d ₁₄ 52.08359 23.80135 12.15120 5.17137 2.10989
d ₁₇ 15.96754 11.83766 8.87742 6.74717 1.12789
d ₂₂ 1.50000 4.35576 7.49811 10.64193 17.10388
d ₂₅ 7.96197 7.07284 5.58079 4.44519 5.93947
d ₃₀ 4.69339 6.85663 8.16658 8.28861 5.95167
.

(Example 3)
r ₁ = 79.8928 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 56.5419 d ₂ = 0.0932
r ₃ = 56.8568 d ₃ = 7.2921 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 279.2946 d ₄ = 0.2000
r ₅ = 71.4740 d ₅ = 5.1087 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 368.5676 d ₆ = (variable)
r ₇ = 297.1098 d ₇ = 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 16.7226 d ₈ = 8.2214
r ₉ = -58.5814 d ₉ = 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 42.9833 d ₁₀ = 2.8172
r ₁₁ = 44.9540 d ₁₁ = 2.4853 n _d6 = 1.68893 ν _d6 = 31.07
r ₁₂ = 67.5910 d ₁₂ = 0.5000 n _d7 = 1.53508 ν _d7 = 40.94
r ₁₃ = 60.4446 (aspherical surface) d ₁₃ = 2.4132
r ₁₄ = -152.6589 d ₁₄ = 2.7489 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₅ = -43.1824 d ₁₅ = (variable)
r ₁₆ = 1521.7545 d ₁₆ = 1.2383 n _d9 = 1.69680 ν _d9 = 55.53
r ₁₇ = 103.2631 d ₁₇ = 1.3581
r ₁₈ = ∞ (aperture) d ₁₈ = (variable)
r ₁₉ = 19.8319 (aspherical surface) d ₁₉ = 6.0797 n _d10 = 1.49700 ν _d10 = 81.54
r ₂₀ = -98.1431 d ₂₀ = 0.1774
r ₂₁ = 41.2385 d ₂₁ = 1.1410 n _d11 = 1.80440 ν _d11 = 39.59
r ₂₂ = 13.6120 d ₂₂ = 5.6638 n _d12 = 1.60311 ν _d12 = 60.64
r ₂₃ = -105.3016 d ₂₃ = (variable)
r ₂₄ = -60.3378 d ₂₄ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₅ = 11.2684 d ₂₅ = 2.0556 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₆ = 16.0592 d ₂₆ = (variable)
r ₂₇ = 57.5023 d ₂₇ = 3.0046 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₈ = -29.3958 (aspherical surface) d ₂₈ = 0.1500
r ₂₉ = 60.6802 d ₂₉ = 4.8459 n _d16 = 1.60311 ν _d16 = _60.64
r ₃₀ = -12.9748 d ₃₀ = 1.0000 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₁ = -47.6191 d ₃₁ = (variable)
r ₃₂ = ∞ d ₃₂ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₅ = ∞ d ₃₅ = 1.0000
r ₃₆ = ∞ d ₃₆ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₇ = ∞ d ₃₇ = 1.2400
r ₃₈ = ∞
Aspheric coefficient 13th surface K = 0
A ₄ = -1.4437 × 10 ^-5
A ₆ = 2.9795 × 10 ^-9
A ₈ = -9.7997 × 10 ^-12
A ₁₀ = 0.0000
19th face K = 0
A ₄ = -1.9829 × 10 ^-5
A ₆ = -1.2490 × 10 ^-8
A ₈ = 9.5912 × 10 ^-12
A ₁₀ = 0.0000
Surface 28 K = 0
A ₄ = -8.0968 × 10 ^-6
A ₆ = -1.4115 × 10 ^-8
A ₈ = -3.7788 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.26002 13.00003 23.30008 41.73033 74.75116
F _NO 2.8003 3.0838 3.4742 3.5003 3.5007
ω (°) 38.42 .13.05 .4.11
d ₆ 1.36006 12.49834 30.21824 47.74332 58.25431
d ₁₅ 54.96399 24.89992 12.03611 4.74729 1.70314
d ₁₈ 17.14336 12.83290 9.24821 6.81249 1.02608
d ₂₃ 1.50000 3.50570 6.35732 8.92130 16.08346
d ₂₆ 7.83356 7.52870 6.60733 5.98190 6.80232
d ₃₁ 5.02576 7.63538 9.28981 9.78699 7.59082
.

Example 4
r ₁ = 81.6544 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 54.5219 d ₂ = 0.0918
r ₃ = 55.1373 d ₃ = 6.6789 n _d2 = 1.60311 ν _d2 = 60.64
r ₄ = 170.0871 d ₄ = 0.2000
r ₅ = 63.9518 d ₅ = 5.5295 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 261.7938 d ₆ = (variable)
r ₇ = 135.9397 d ₇ = 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 18.6691 d ₈ = 7.1069
r ₉ = -77.9436 d ₉ = 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 29.3916 d ₁₀ = 3.6128
r ₁₁ = -136.6311 (aspherical surface) d ₁₁ = 2.6052 n _d6 = 1.68893 ν _d6 = 31.07
r ₁₂ = -93.2719 d ₁₂ = 1.2000 n _d7 = 1.77250 ν _d7 = 49.60
r ₁₃ = 48.4132 d ₁₃ = 0.1500
r ₁₄ = 40.2538 d ₁₄ = 5.6753 n _d8 = 1.68893 ν _d8 = 31.07
r ₁₅ = -41.2699 d ₁₅ = (variable)
r ₁₆ = ∞ (aperture) d ₁₆ = (variable)
r ₁₇ = 20.5800 (aspherical surface) d ₁₇ = 3.1262 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₈ = -89.3640 d ₁₈ = 0.1500
r ₁₉ = 221.1623 d ₁₉ = 3.2743 n _d10 = 1.48749 ν _d10 = 70.23
r ₂₀ = -22.6962 d ₂₀ = 1.0743 n _d11 = 1.69895 ν _d11 = 30.13
r ₂₁ = -65.3546 d ₂₁ = (variable)
r ₂₂ = -44.1685 d ₂₂ = 2.2362 n _d12 = 1.84666 ν _d12 = 23.78
r ₂₃ = -17.9114 d ₂₃ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₄ = 19.1017 d ₂₄ = (variable)
r ₂₅ = 26.6661 (aspherical surface) d ₂₅ = 3.6847 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = -34.1574 d ₂₆ = 0.1500
r ₂₇ = 52.2108 d ₂₇ = 4.2853 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₈ = -14.7656 d ₂₈ = 1.2000 n _d16 = 1.80518 ν _d16 = 25.42
r ₂₉ = -55.0799 d ₂₉ = (variable)
r ₃₀ = ∞ d ₃₀ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₁ = ∞ d ₃₁ = 1.0000
r ₃₂ = ∞ d ₃₂ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₅ = ∞ d ₃₅ = 1.2400
r ₃₆ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 1.0139 × 10 ^-5
A ₆ = 3.2872 × 10 ^-9
A ₈ = -1.1023 × 10 ^-11
A ₁₀ = 0.0000
Surface 17 K = 0
A ₄ = -1.7036 × 10 ^-5
A ₆ = -1.7437 × 10 ^-8
A ₈ = 4.5946 × 10 ^-11
A ₁₀ = 0.0000
25th face K = 0
A ₄ = 3.4248 × 10 ^-6
A ₆ = 1.4711 × 10 ^-8
A ₈ = 4.5298 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.25999. 23.29992. 74.74889
F _NO 2.8000. 3.5801. 3.5000
ω (°) 38.54. 13.22. 4.14
d ₆ 1.00000 14.89793 31.05521 47.12742 59.32091
d ₁₅ 52.30556 29.13766 15.90712 7.48462 2.50000
d ₁₆ 20.23714 12.06038 7.38350 5.16625 1.27216
d ₂₁ 3.72767 5.35270 8.32036 10.89531 15.89787
d ₂₄ 3.24286 7.15116 6.72019 5.06310 5.57919
d ₂₉ 4.69211 7.33554 9.47573 10.77513 9.15056
.

(Example 5)
r ₁ = 78.1210 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 52.5351 d ₂ = 0.0776
r ₃ = 53.2073 d ₃ = 6.8025 n _d2 = 1.60311 ν _d2 = 60.64
r ₄ = 159.3705 d ₄ = 0.2000
r ₅ = 65.8776 d ₅ = 5.5331 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 303.8063 d ₆ = (variable)
r ₇ = 163.0022 d ₇ = 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 17.9806 d ₈ = 6.9388
r ₉ = -95.4021 d ₉ = 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 31.9739 d ₁₀ = 3.3248
r ₁₁ = -83.4161 (aspherical surface) d ₁₁ = 2.2162 n _d6 = 1.68893 ν _d6 = 31.07
r ₁₂ = -51.8821 d ₁₂ = 1.2000 n _d7 = 1.77250 ν _d7 = 49.60
r ₁₃ = 110.2656 d ₁₃ = 0.1500
r ₁₄ = 52.7805 d ₁₄ = 4.8751 n _d8 = 1.68893 ν _d8 = 31.07
r ₁₅ = -44.3555 d ₁₅ = (variable)
r ₁₆ = ∞ (aperture) d ₁₆ = (variable)
r ₁₇ = 20.3453 (aspherical surface) d ₁₇ = 4.8644 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₈ = -18.1397 d ₁₈ = 0.1995
r ₁₉ = -17.0247 d ₁₉ = 0.9865 n _d10 = 1.58144 ν _d10 = 40.75
r ₂₀ = -41.9737 d ₂₀ = (variable)
r ₂₁ = -34.7870 d ₂₁ = 1.6000 n _d11 = 1.84666 ν _d11 = 23.78
r ₂₂ = -15.2340 d ₂₂ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₃ = 20.7010 d ₂₃ = (variable)
r ₂₄ = 21.6523 d ₂₄ = 1.2000 n _d13 = 1.80518 ν _d13 = 25.42
r ₂₅ = 11.8448 d ₂₅ = 5.1050 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = 282.0413 d ₂₆ = 0.1500
r ₂₇ = 18.6629 d ₂₇ = 5.4207 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₈ = -35.6003 (aspherical surface) d ₂₈ = 0.1500
r ₂₉ = 45.1746 d ₂₉ = 1.0526 n _d16 = 1.80518 ν _d16 = 25.42
r ₃₀ = 26.6635 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 7.1125 × 10 ^-6
A ₆ = 2.0512 × 10 ^-8
A ₈ = -5.1595 × 10 ^-11
A ₁₀ = 0.0000
Surface 17 K = 0
A ₄ = -1.5184 × 10 ^-5
A ₆ = -2.3566 × 10 ^-8
A ₈ = 3.4360 × 10 ^-10
A ₁₀ = 0.0000
Surface 28 K = 0
A ₄ = 3.1780 × 10 ^-5
A ₆ = -9.9597 × 10 ^-8
A ₈ = -5.2192 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.25999. 23.29997. 74.75182
F _NO 2.8000. 3.5778. 3.5000
ω (°) 38.52. 13.19. 4.13
d ₆ 1.04546 15.02846 31.09889 46.16763 59.30495
d ₁₅ 52.08237 29.21796 16.44547 7.46848 2.50000
d ₁₆ 19.83770 12.09302 7.11800 4.38285 1.23876
d ₂₀ 2.85510 5.90624 9.13593 11.32215 15.45881
d ₂₃ 4.36441 7.15116 6.72019 5.06310 5.57919
d ₃₀ 5.49442 7.40121 9.57751 11.78353 10.27488
.

(Example 6)
r ₁ = 141.6786 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 82.2770 d ₂ = 0.2054
r ₃ = 86.0098 d ₃ = 6.6214 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -623.7275 d ₄ = 0.2000
r ₅ = 66.9330 d ₅ = 4.9709 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 242.1492 d ₆ = (variable)
r ₇ = -1681.4393 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 17.8527 d ₈ = 8.5980
r ₉ = -59.5314 (aspherical surface) d ₉ = 0.2000 n _d5 = 1.53508 ν _d5 = 40.94
r ₁₀ = -119.6362 d ₁₀ = 1.3000 n _d6 = 1.77250 ν _d6 = 49.60
r ₁₁ = 342.3608 d ₁₁ = 4.1895
r ₁₂ = -24.2842 d ₁₂ = 1.1790 n _d7 = 1.48749 ν _d7 = 70.23
r ₁₃ = -101.8680 d ₁₃ = 4.5574 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₄ = -33.5232 d ₁₄ = (variable)
r ₁₅ = -17.5269 d ₁₅ = 1.3000 n _d9 = 1.77250 ν _d9 = 49.60
r ₁₆ = -20.0488 d ₁₆ = 1.0127
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 21.3027 (aspherical surface) d ₁₈ = 5.1829 n _d10 = 1.49700 ν _d10 = 81.54
r ₁₉ = -71.1108 d ₁₉ = 0.0740
r ₂₀ = 64.9416 d ₂₀ = 1.1010 n _d11 = 1.80610 ν _d11 = 40.92
r ₂₁ = 16.9316 d ₂₁ = 5.1171 n _d12 = 1.49700 ν _d12 = 81.54
r ₂₂ = -53.3840 d ₂₂ = (variable)
r ₂₃ = -52.6066 d ₂₃ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₄ = 13.9038 d ₂₄ = 3.2142 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₅ = 21.1652 d ₂₅ = (variable)
r ₂₆ = 30.4474 (aspherical surface) d ₂₆ = 5.0612 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₇ = -27.3044 d ₂₇ = 0.1500
r ₂₈ = 172.6100 d ₂₈ = 4.5076 n _d16 = 1.61800 ν _d16 = 63.33
r ₂₉ = -16.2580 d ₂₉ = 1.0000 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₀ = -61.9158 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = 2.2129 × 10 ^-5
A ₆ = 6.5725 × 10 ^-10
A ₈ = 7.2804 × 10 ^-11
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -1.8979 × 10 ^-5
A ₆ = 8.7960 × 10 ^-9
A ₈ = -1.5301 × 10 ^-10
A ₁₀ = 0.0000
26th face K = 0
A ₄ = -1.7277 × 10 ^-5
A ₆ = 3.9898 × 10 ^-9
A ₈ = -5.5382 × 10 ^-11
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.26002 13.00003 23.30013 41.73069 74.75304
F _NO 2.8000 3.4061 3.5000 3.5000 3.5000
ω (°) 38.45. 13.03. 4.12
d ₆ 1.69990 10.56611 29.95684 47.14010 57.75352
d ₁₄ 38.83846 18.70163 9.09372 4.72000 2.59257
d ₁₇ 25.00055 15.77754 11.57455 7.61504 1.02237
d ₂₂ 1.49193 7.85215 11.95770 16.03342 23.12571
d ₂₅ 8.12406 8.99710 6.58794 5.19826 5.37687
d ₃₀ 4.61121 5.36097 6.51641 6.38966 4.90755
.

(Example 7)
r ₁ = 133.2906 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 79.7190 d ₂ = 0.4683
r ₃ = 88.0849 d ₃ = 6.7955 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -928.2450 d ₄ = 0.2000
r ₅ = 61.1424 d ₅ = 5.7149 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 290.9980 d ₆ = (variable)
r ₇ = 858.6153 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 17.2556 d ₈ = 8.7043
r ₉ = -65.5194 (aspherical surface) d ₉ = 0.2000 n _d5 = 1.53508 ν _d5 = 40.94
r ₁₀ = -103.0065 d ₁₀ = 1.3000 n _d6 = 1.77250 ν _d6 = 49.60
r ₁₁ = 207.4789 d ₁₁ = 3.9972
r ₁₂ = -29.5057 d ₁₂ = 1.2706 n _d7 = 1.60311 ν _d7 = 60.64
r ₁₃ = -3.472 × 10 ⁴ d ₁₃ = 4.4191 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₄ = -39.4285 d ₁₄ = (variable)
r ₁₅ = -14.2222 d ₁₅ = 1.3000 n _d9 = 1.77250 ν _d9 = 49.60
r ₁₆ = -15.6911 d ₁₆ = 0.9994
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 29.1466 (aspherical surface) d ₁₈ = 5.3713 n _d10 = 1.49700 ν _d10 = 81.54
r ₁₉ = -55.2100 d ₁₉ = 0.1000
r ₂₀ = -2878.6841 d ₂₀ = 1.0357 n _d11 = 1.69895 ν _d11 = 30.13
r ₂₁ = 26.7931 d ₂₁ = 5.3045 n _d12 = 1.61800 ν _d12 = 63.33
r ₂₂ = -52.9610 d ₂₂ = (variable)
r ₂₃ = -72.6679 d ₂₃ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₄ = 14.0385 d ₂₄ = 3.1899 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₅ = 23.1764 d ₂₅ = (variable)
r ₂₆ = 34.1187 (aspherical surface) d ₂₆ = 4.0924 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₇ = -27.1159 d ₂₇ = 0.1500
r ₂₈ = -179.2221 d ₂₈ = 4.5403 n _d16 = 1.61800 ν _d16 = 63.33
r ₂₉ = -13.8901 d ₂₉ = 1.0000 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₀ = -48.2993 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = 2.2685 × 10 ^-5
A ₆ = -9.9328 × 10 ^-9
A ₈ = 6.5515 × 10 ^-11
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -1.5955 × 10 ^-5
A ₆ = 1.0315 × 10 ^-8
A ₈ = -9.0638 × 10 ^-11
A ₁₀ = 0.0000
26th face K = 0
A ₄ = -1.7668 × 10 ^-5
A ₆ = -1.6378 × 10 ^-9
A ₈ = 5.8919 × 10 ^-11
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.25994 12.99979 23.29960 41.72935 74.74958
F _NO 2.8000 3.2736 3.5000 3.5000 3.5000
ω (°) 38.48. 13.03. 4.10
d ₆ 1.57613 10.58693 29.66082 47.22031 57.38048
d ₁₄ 35.33624 14.67575 7.05728 3.95447 2.57253
d ₁₇ 27.90225 18.46229 13.50552 9.05177 1.02205
d ₂₂ 2.01227 6.50604 11.64080 16.22329 23.37367
d ₂₅ 7.59111 7.59111 7.59111 7.59111 7.59111
d ₃₀ 4.35060 6.30937 6.83154 6.23847 5.63660
.

(Example 8)
r ₁ = 154.0084 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 85.1308 d ₂ = 0.2000
r ₃ = 89.0506 d ₃ = 6.8812 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -500.6640 d ₄ = 0.2000
r ₅ = 71.0865 d ₅ = 4.9871 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 321.2628 d ₆ = (variable)
r ₇ = -1661.3349 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 18.0950 d ₈ = 8.8337
r ₉ = -62.2296 (aspherical surface) d ₉ = 0.2000 n _d5 = 1.53508 ν _d5 = 40.94
r ₁₀ = -129.5877 d ₁₀ = 1.3000 n _d6 = 1.77250 ν _d6 = 49.60
r ₁₁ = 1178.5652 d ₁₁ = 3.1344
r ₁₂ = -33.4282 d ₁₂ = 1.1790 n _d7 = 1.48749 ν _d7 = 70.23
r ₁₃ = 90.9167 d ₁₃ = 4.3569 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₄ = -65.5020 d ₁₄ = (variable)
r ₁₅ = ∞ (aperture) d ₁₅ = 2.6661
r ₁₆ = -14.4489 d ₁₆ = 0.9955 n _d9 = 1.77250 ν _d9 = 49.60
r ₁₇ = -16.4057 d ₁₇ = (variable)
r ₁₈ = 29.3239 (aspherical surface) d ₁₈ = 5.3050 n _d10 = 1.80610 ν _d10 = 40.74
r ₁₉ = 422.7477 d ₁₉ = 0.4857
r ₂₀ = 93.3084 d ₂₀ = 1.0357 n _d11 = 1.69895 ν _d11 = 30.13
r ₂₁ = 16.2156 d ₂₁ = 5.2656 n _d12 = 1.49700 ν _d12 = 81.54
r ₂₂ = -38.2018 d ₂₂ = (variable)
r ₂₃ = -65.0932 d ₂₃ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₄ = 13.7958 d ₂₄ = 2.9478 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₅ = 19.9898 d ₂₅ = (variable)
r ₂₆ = 26.7797 (aspherical surface) d ₂₆ = 4.1503 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₇ = -33.3863 d ₂₇ = 0.1500
r ₂₈ = 66.7328 d ₂₈ = 4.3835 n _d16 = 1.61800 ν _d16 = 63.33
r ₂₉ = -18.3728 d ₂₉ = 1.0000 n _d17 = 1.80518 ν _d17 = 25.42
r ₃₀ = -118.1096 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = 1.7476 × 10 ^-5
A ₆ = 1.7656 × 10 ^-8
A ₈ = 2.5483 × 10 ^-11
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -7.2819 × 10 ^-6
A ₆ = 1.5490 × 10 ^-8
A ₈ = -1.0251 × 10 ^-10
A ₁₀ = 0.0000
26th face K = 0
A ₄ = -1.2862 × 10 ^-5
A ₆ = -1.1215 × 10 ^-8
A ₈ = 2.6887 × 10 ^-11
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.26000 13.00004 23.30000 41.73010 74.75000
F _NO 2.8000 3.2452 3.5000 3.5000 3.5000
ω (°) 38.43. 13.04. 4.11
d ₆ 1.51813 10.76717 29.84510 47.35892 58.73695
d ₁₄ 43.62221 20.67892 10.31138 5.77694 1.73681
d ₁₇ 19.34970 13.11504 9.54525 5.96595 0.99829
d ₂₂ 2.58148 8.81614 12.38593 15.96522 20.93289
d ₂₅ 8.67490 7.43440 5.56358 5.04338 5.18729
d ₃₀ 4.28215 5.52265 7.39346 7.91366 7.76975
.

Example 9
r ₁ = 125.4804 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 73.9280 d ₂ = 0.6131
r ₃ = 82.0053 d ₃ = 7.1121 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -2731.9228 d ₄ = 0.2000
r ₅ = 73.7403 d ₅ = 6.0707 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 689.0297 d ₆ = (variable)
r ₇ = 327.5056 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 14.2610 d ₈ = 8.5253
r ₉ = -89.4120 d ₉ = 1.3000 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 38.2328 d ₁₀ = 0.2000 n _d6 = 1.53508 ν _d6 = 40.94
r ₁₁ = 28.4986 (aspherical surface) d ₁₁ = 2.5230
r ₁₂ = 47.5033 d ₁₂ = 1.1790 n _d7 = 1.48749 ν _d7 = 70.23
r ₁₃ = 34.1694 d ₁₃ = 3.2934 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₄ = -324.6493 d ₁₄ = (variable)
r ₁₅ = ∞ (aperture) d ₁₅ = (variable)
r ₁₆ = 16.9572 (aspherical surface) d ₁₆ = 7.2692 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₇ = 452.6400 d ₁₇ = 0.1000
r ₁₈ = 136.4678 d ₁₈ = 1.1010 n _d10 = 1.80610 ν _d10 = 40.92
r ₁₉ = 15.7221 d ₁₉ = 5.6961 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₀ = -38.5697 d ₂₀ = (variable)
r ₂₁ = 58.4853 d ₂₁ = 3.0175 n _d12 = 1.84666 ν _d12 = 23.78
r ₂₂ = -202.3168 d ₂₂ = 1.4952 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₃ = 15.1757 d ₂₃ = 8.9786
r ₂₄ = -49.4262 (aspherical surface) d ₂₄ = 5.1311 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₅ = -19.2986 d ₂₅ = 0.1500
r ₂₆ = 18.4543 d ₂₆ = 5.9364 n _d15 = 1.61800 ν _d15 = 63.33
r ₂₇ = -38.6487 d ₂₇ = 1.0000 n _d16 = 1.84666 ν _d16 = 23.78
r ₂₈ = 76.9096 d ₂₈ = (variable)
r ₂₉ = ∞ d ₂₉ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₀ = ∞ d ₃₀ = 1.0000
r ₃₁ = ∞ d ₃₁ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₄ = ∞ d ₃₄ = 1.2400
r ₃₅ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = -2.9080 × 10 ^-5
A ₆ = -4.7003 × 10 ^-8
A ₈ = 1.3039 × 10 ^-11
A ₁₀ = 0.0000
16th surface K = 0
A ₄ = -2.6940 × 10 ^-5
A ₆ = -2.6991 × 10 ^-8
A ₈ = -4.1850 × 10 ^-11
A ₁₀ = 0.0000
24th face K = 0
A ₄ = 4.8837 × 10 ^-6
A ₆ = 4.0251 × 10 ^-8
A ₈ = 5.0375 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.26010 13.00010 23.30000 41.72939 74.74571
F _NO 2.8000 3.2311 3.5000 3.5000 3.5000
ω (°) 38.43. 12.96. 4.12
d ₄ 1.22382 10.57521 30.86112 47.17255 60.33060
d ₁₄ 44.41629 22.39761 12.10735 5.55000 2.52402
d ₁₅ 18.02944 9.25134 6.75230 3.90933 1.06282
d ₂₀ 1.56309 6.26309 10.18795 14.94609 18.74913
d ₂₈ 2.00000 5.88418 8.79568 11.11914 9.89434
.

(Example 10)
r ₁ = 127.5747 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 76.5681 d ₂ = 0.6108
r ₃ = 87.0503 d ₃ = 6.7061 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -906.1216 d ₄ = 0.2000
r ₅ = 65.5756 d ₅ = 5.1656 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 257.9868 d ₆ = (variable)
r ₇ = -841.7430 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 20.7672 d ₈ = 0.1181 n _d5 = 1.53508 ν _d5 = 40.94
r ₉ = 17.4318 (aspherical surface) d ₉ = 8.3674
r ₁₀ = -69.0347 d ₁₀ = 1.3000 n _d6 = 1.77250 ν _d6 = 49.60
r ₁₁ = 50.8067 d ₁₁ = 3.5790
r ₁₂ = -34.9364 d ₁₂ = 1.2000 n _d7 = 1.48749 ν _d7 = 70.23
r ₁₃ = -206.9525 d ₁₃ = 0.7359
r ₁₄ = 131.5379 d ₁₄ = 2.9312 n _d8 = 1.68893 ν _d8 = 31.07
r ₁₅ = -65.1273 d ₁₅ = 0.2838
r ₁₆ = 446.1597 d ₁₆ = 3.4504 n _d9 = 1.84666 ν _d9 = 23.78
r ₁₇ = -111.5214 d ₁₇ = (variable)
r ₁₈ = -89.0223 d ₁₈ = 1.2751 n _d10 = 1.73400 ν _d10 = 51.47
r ₁₉ = -5156.0079 d ₁₉ = 1.0546
r ₂₀ = ∞ (aperture) d ₂₀ = (variable)
r ₂₁ = 20.4978 (aspherical surface) d ₂₁ = 5.4824 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₂ = -55.0155 d ₂₂ = 0.4103
r ₂₃ = 42.1503 d ₂₃ = 1.1010 n _d12 = 1.80610 ν _d12 = 40.92
r ₂₄ = 14.0853 d ₂₄ = 5.1806 n _d13 = 1.49700 ν _d13 = 81.54
r ₂₅ = -75.3872 d ₂₅ = (variable)
r ₂₆ = -29.7893 d ₂₆ = 0.9000 n _d14 = 1.51633 ν _d14 = 64.14
r ₂₇ = 14.3985 d ₂₇ = 3.2881 n _d15 = 1.84666 ν _d15 = 23.78
r ₂₈ = 28.0747 d ₂₈ = (variable)
r ₂₉ = 117.1492 (aspherical surface) d ₂₉ = 4.3053 n _d16 = 1.49700 ν _d16 = 81.54
r ₃₀ = -21.7875 d ₃₀ = 0.1500
r ₃₁ = 78.2931 d ₃₁ = 5.0168 n _d17 = 1.61800 ν _d17 = 63.33
r ₃₂ = -14.1145 d ₃₂ = 1.0000 n _d18 = 1.84666 ν _d18 = 23.78
r ₃₃ = -50.2289 d ₃₃ = (variable)
r ₃₄ = ∞ d ₃₄ = 16.0000 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₅ = ∞ d ₃₅ = 1.0000
r ₃₆ = ∞ d ₃₆ = 2.6000 n _d20 = 1.54771 ν _d20 = 62.84
r ₃₇ = ∞ d ₃₇ = 1.0000
r ₃₈ = ∞ d ₃₈ = 0.7500 n _d21 = 1.51633 ν _d21 = 64.14
r ₃₉ = ∞ d ₃₉ = 1.2400
r ₄₀ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = -1.8060 × 10 ^-5
A ₆ = -1.5653 × 10 ^-8
A ₈ = -3.1402 × 10 ^-10
A ₁₀ = 0.0000
21st surface K = 0
A ₄ = -1.9350 × 10 ^-5
A ₆ = 8.1535 × 10 ^-9
A ₈ = -1.1537 × 10 ^-10
A ₁₀ = 0.0000
No. 29 K = 0
A ₄ = -1.4723 × 10 ^-5
A ₆ = -4.3194 × 10 ^-9
A ₈ = 1.8719 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.26000 13.00000 23.30008 41.73059 74.75291
F _NO 2.8000 3.4512 3.5000 3.5000 3.5000
ω (°) 38.48. 12.85. 4.11
d ₆ 1.64787 10.58883 30.04822 47.11870 58.44456
d ₁₇ 44.72174 22.79418 11.48117 5.95085 3.03382
d ₂₀ 18.91464 11.56777 8.33111 5.33947 1.07479
d ₂₅ 1.84897 8.03143 11.95783 16.13820 22.70498
d ₂₈ 8.28264 8.78214 6.88040 5.85483 5.87377
d ₃₃ 4.71029 5.37520 6.58719 6.42403 4.10299
.

(Example 11)
r ₁ = 89.8312 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 63.9685 d ₂ = 0.0006
r ₃ = 64.1053 d ₃ = 9.1675 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 479.8472 d ₄ = 0.2000
r ₅ = 75.2405 d ₅ = 6.4325 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 342.9922 d ₆ = (variable)
r ₇ = 959.9708 d ₇ = 1.8000 n _d4 = 1.81600 ν _d4 = 46.62
r ₈ = 18.8418 d ₈ = 5.3800
r ₉ = -472.5238 d ₉ = 1.1000 n _d5 = 1.73400 ν _d5 = 51.47
r ₁₀ = 28.9390 d ₁₀ = 5.9081
r ₁₁ = -29.2098 d ₁₁ = 1.2000 n _d6 = 1.71300 ν _d6 = 53.87
r ₁₂ = 100.5460 d ₁₂ = 0.1500
r ₁₃ = 49.3222 d ₁₃ = 7.5695 n _d7 = 1.63980 ν _d7 = 34.46
r ₁₄ = -24.6810 (aspherical surface) d ₁₄ = (variable)
r ₁₅ = 1133.4292 d ₁₅ = 1.2000 n _d8 = 1.78472 ν _d8 = 25.68
r ₁₆ = 106.5968 d ₁₆ = 0.2500
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 20.1552 (aspherical surface) d ₁₈ = 5.1000 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₉ = -94.7419 d ₁₉ = 0.1774
r ₂₀ = 36.0051 d ₂₀ = 1.1410 n _d10 = 1.80440 ν _d10 = 39.59
r ₂₁ = 13.5064 d ₂₁ = 5.5328 n _d11 = 1.60311 ν _d11 = 60.64
r ₂₂ = -1129.4923 d ₂₂ = (variable)
r ₂₃ = -72.5596 d ₂₃ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₄ = 11.8049 d ₂₄ = 2.9338 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₅ = 16.8009 d ₂₅ = (variable)
r ₂₆ = 91.9126 d ₂₆ = 2.9663 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₇ = -29.0231 (aspherical surface) d ₂₇ = 0.1500
r ₂₈ = 48.8627 d ₂₈ = 5.1022 n _d15 = 1.60311 ν _d15 = 60.64
r ₂₉ = -13.3197 d ₂₉ = 0.8500 n _d16 = 1.84666 ν _d16 = 23.78
r ₃₀ = -48.0006 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 14th surface K = 0
A ₄ = -8.9550 × 10 ^-9
A ₆ = 8.4748 × 10 ^-9
A ₈ = 1.6761 × 10 ^-11
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -1.7592 × 10 ^-5
A ₆ = 4.4455 × 10 ^-9
A ₈ = -1.3451 × 10 ^-10
A ₁₀ = 0.0000
Surface 27 K = 0
A ₄ = -1.4716 × 10 ^-6
A ₆ = 1.5442 × 10 ^-9
A ₈ = -2.3629 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.33845 13.10321 23.28940 38.89145 74.68837
F _NO 2.8000 3.1859 3.5000 3.5000 3.5000
ω (°) 38.12. 13.01. 4.08
d ₆ 1.36006 12.64030 31.07482 48.17964 61.33273
d ₁₄ 54.26370 25.04693 11.10499 5.19824 1.70314
d ₁₇ 17.41698 12.14210 8.86214 6.81538 1.02608
d ₂₂ 1.50000 4.14980 6.85803 9.34039 16.90092
d ₂₅ 6.85640 7.47895 6.17972 5.74352 6.81559
d ₃₀ 4.46020 7.59229 8.38310 9.82468 5.35600
.

(Example 12)
r ₁ = 82.2399 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 60.0259 d ₂ = 0.1000
r ₃ = 60.6829 d ₃ = 7.7500 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 307.4605 d ₄ = 0.2000
r ₅ = 72.7643 d ₅ = 5.8500 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 328.6935 d ₆ = (variable)
r ₇ = 266.6699 d ₇ = 1.8000 n _d4 = 1.81600 ν _d4 = 46.62
r ₈ = 18.3068 d ₈ = 6.0269
r ₉ = -91.9091 d ₉ = 1.1000 n _d5 = 1.73400 ν _d5 = 51.47
r ₁₀ = 31.9296 d ₁₀ = 5.1735
r ₁₁ = -33.4696 (aspherical surface) d ₁₁ = 1.2000 n _d6 = 1.71300 ν _d6 = 53.87
r ₁₂ = 1.387 × 10 ⁴ d ₁₂ = 0.1500
r ₁₃ = 76.1645 d ₁₃ = 6.2143 n _d7 = 1.69895 ν _d7 = 30.13
r ₁₄ = -29.0944 d ₁₄ = (variable)
r ₁₅ = -256.8086 d ₁₅ = 1.0000 n _d8 = 1.78472 ν _d8 = 25.68
r ₁₆ = 217.7610 d ₁₆ = 0.2030
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 19.3410 (aspherical surface) d ₁₈ = 5.5508 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₉ = -61.9647 d ₁₉ = 0.1774
r ₂₀ = 28.8671 d ₂₀ = 1.1410 n _d10 = 1.80440 ν _d10 = 39.59
r ₂₁ = 13.5945 d ₂₁ = 5.8000 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₂ = 5392.6719 d ₂₂ = (variable)
r ₂₃ = -154.6780 d ₂₃ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₄ = 11.7076 d ₂₄ = 3.6031 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₅ = 15.0847 d ₂₅ = (variable)
r ₂₆ = 50.4757 d ₂₆ = 3.2775 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₇ = -50.8313 (aspherical surface) d ₂₇ = 0.1500
r ₂₈ = 45.8348 d ₂₈ = 5.5505 n _d15 = 1.60311 ν _d15 = 60.64
r ₂₉ = -13.2011 d ₂₉ = 0.8500 n _d16 = 1.84666 ν _d16 = 23.78
r ₃₀ = -38.4178 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 2.1955 × 10 ^-6
A ₆ = 7.9776 × 10 ^-10
A ₈ = 4.2465 × 10 ^-12
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -2.2173 × 10 ^-5
A ₆ = -5.2442 × 10 ^-10
A ₈ = -1.3172 × 10 ^-10
A ₁₀ = 0.0000
Surface 27 K = 0
A ₄ = -4.3385 × 10 ^-6
A ₆ = -5.8507 × 10 ^-9
A ₈ = -3.8312 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.35253 13.14155 23.30044 40.58970 74.68803
F _NO 2.8000 3.1943 3.5000 3.5000 3.5000
ω (°) 38.09. 13.06. 4.10
d ₆ 1.36006 12.88245 31.00495 49.05687 59.99418
d ₁₄ 52.40573 25.29926 11.47801 5.29211 1.70314
d ₁₇ 17.47445 12.09215 9.07829 6.89688 1.02608
d ₂₂ 1.50000 3.82243 6.29079 8.72220 16.22424
d ₂₅ 6.18879 6.98900 5.58223 5.34260 5.88322
d ₃₀ 1.19155 7.72421 5.35600 9.52720 3.22100
.

(Example 13)
r ₁ = 128.1845 d ₁ 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 77.8836 d ₂ 0.1422
r ₃ = 79.5351 d ₃ 8.7726 n _d2 = 1.60311 ν _d2 = 60.64
r ₄ = 1.760 × 10 ⁵ d ₄ 0.2000
r ₅ = 60.5207 d ₅ 7.8199 n _d3 = 1.49700 ν _d3 = 81.54
r ₆ = 225.3888 d ₆ = (variable)
r ₇ = 87.0813 d ₇ 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 15.7852 d ₈ 8.9335
r ₉ = -28.4093 d ₉ 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 61.5066 d ₁₀ 2.4804
r ₁₁ = -48.6469 (aspherical surface) d ₁₁ 0.2000 n _d6 = 1.53508 ν _d6 = 40.94
r ₁₂ = -200.0000 d ₁₂ 1.2000 n _d7 = 1.69350 ν _d7 = 53.20
r ₁₃ = 96.2114 d ₁₃ 0.2000
r ₁₄ = 68.6685 d ₁₄ 6.7199 n _d8 = 1.68893 ν _d8 = 31.07
r ₁₅ = -32.7420 d ₁₅ = (variable)
r ₁₆ = ∞ (aperture) d ₁₆ 0.4000
r ₁₇ = 312.4731 d ₁₇ 0.9972 n _d9 = 1.60342 ν _d9 = _38.03
r ₁₈ = -144.3938 d ₁₈ = (variable)
r ₁₉ = 18.9253 (aspherical surface) d ₁₉ 3.6985 n _d10 = 1.49700 ν _d10 = 81.54
r ₂₀ = -1.054 × 10 ⁷ d ₂₀ 0.1774
r ₂₁ = 58.8544 d ₂₁ 1.1208 n _d11 = 1.77250 ν _d11 = 49.60
r ₂₂ = 15.9897 d ₂₂ 4.9136 n _d12 = 1.49700 ν _d12 = 81.54
r ₂₃ = -68.6413 d ₂₃ = (variable)
r ₂₄ = -73.7867 d ₂₄ 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₅ = 17.0943 d ₂₅ 1.8262 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₆ = 22.4714 d ₂₆ = (variable)
r ₂₇ = 37.0884 (aspherical surface) d ₂₇ 4.8733 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₈ = -23.1086 d ₂₈ 0.1500
r ₂₉ = -909.2556 d ₂₉ 3.3951 n _d16 = 1.49700 ν _d16 = 81.54
r ₃₀ = -18.5310 d ₃₀ 1.0265 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₁ = -50.0749 d ₃₁ = (variable)
r ₃₂ = ∞ d ₃₂ 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₃ = ∞ d ₃₃ 1.0000
r ₃₄ = ∞ d ₃₄ 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₅ = ∞ d ₃₅ 1.0000
r ₃₆ = ∞ d ₃₆ 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₇ = ∞ d ₃₇ 1.2400
r ₃₈ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 9.2934 × 10 ^-6
A ₆ = -4.3005 × 10 ^-9
A ₈ = -6.0577 × 10 ^-11
A ₁₀ = 0.0000
19th face K = 0
A ₄ = -1.5515 × 10 ^-5
A ₆ = -1.5901 × 10 ^-9
A ₈ = -1.9683 × 10 ^-10
A ₁₀ = 0.0000
Surface 27 K = 0
A ₄ = -1.7557 × 10 ^-5
A ₆ = -2.2661 × 10 ^-9
A ₈ = 1.2023 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.27699 13.13483 23.30156 41.85838 74.69868
F _NO 2.8000 3.0096 3.5000 3.5000 3.5000
ω (°) 38.47. 13.07. 4.13
d ₆ 1.00000 12.32463 29.12057 47.14255 58.02772
d ₁₅ 6.72043 27.00532 13.69308 7.48255 2.50000
d ₁₈ 20.38443 13.68554 10.29674 7.22603 1.55935
d ₂₃ 0.86734 3.00362 6.20380 8.91257 14.79711
d ₂₆ 7.49819 8.31394 5.77953 5.09499 5.49059
d ₃₁ 5.53190 9.13816 11.98670 8.63592 12.42630
.

(Example 14)
r ₁ = 117.1093 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 78.9815 d ₂ = 0.2900
r ₃ = 83.6308 d ₃ = 7.1360 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 8.136 × 10 ⁴ d ₄ = 0.2000
r ₅ = 64.0026 d ₅ = 7.2854 n _d3 = 1.49700 ν _d3 = 81.54
r ₆ = 406.9074 d ₆ = (variable)
r ₇ = 173.0596 d ₇ = 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 14.7807 d ₈ = 8.6963
r ₉ = -33.4479 d ₉ = 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 82.7642 d ₁₀ = 1.5769
r ₁₁ = -78.1187 (aspherical surface) d ₁₁ = 0.4088 n _d6 = 1.66680 ν _d6 = 33.05
r ₁₂ = 518.9177 d ₁₂ = 1.2000 n _d7 = 1.69350 ν _d7 = 53.20
r ₁₃ = 55.8817 d ₁₃ = 0.0065
r ₁₄ = 43.1420 d ₁₄ = 5.9081 n _d8 = 1.68893 ν _d8 = 31.07
r ₁₅ = -31.8050 d ₁₅ = (variable)
r ₁₆ = ∞ (aperture) d ₁₆ = (variable)
r ₁₇ = 21.9025 (aspherical surface) d ₁₇ = 3.3063 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₈ = -1.082 × 10 ⁶ d ₁₈ = 0.2991
r ₁₉ = 30.2359 d ₁₉ = 1.1208 n _d10 = 1.77250 ν _d10 = 49.60
r ₂₀ = 14.9061 d ₂₀ = 5.0481 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₁ = -81.9434 d ₂₁ = (variable)
r ₂₂ = -101.2030 d ₂₂ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₃ = 15.4168 d ₂₃ = 1.8234 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₄ = 20.2251 d ₂₄ = (variable)
r ₂₅ = 42.9650 (aspherical surface) d ₂₅ = 4.1635 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = -21.2353 d ₂₆ = 0.1500
r ₂₇ = -231.8094 d ₂₇ = 2.6973 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₈ = -16.2244 d ₂₈ = 1.2276 n _d16 = 1.84666 ν _d16 = 23.78
r ₂₉ = -47.0800 d ₂₉ = (variable)
r ₃₀ = ∞ d ₃₀ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₁ = ∞ d ₃₁ = 1.0000
r ₃₂ = ∞ d ₃₂ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₅ = ∞ d ₃₅ = 1.2400
r ₃₆ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 8.8203 × 10 ^-6
A ₆ = 9.5199 × 10 ^-9
A ₈ = -4.6923 × 10 ^-11
A ₁₀ = 0.0000
Surface 17 K = 0
A ₄ = -1.2806 × 10 ^-5
A ₆ = -2.1296 × 10 ^-9
A ₈ = -2.5132 × 10 ^-11
A ₁₀ = 0.0000
25th face K = 0
A ₄ = -1.7844 × 10 ^-5
A ₆ = 8.4598 × 10 ^-10
A ₈ = 1.3070 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.33668 13.24737 23.30078 42.13815 74.69414
F _NO 2.8000 3.0902 3.5000 3.5000 3.5000
ω (°) 38.27 .13.00 .4.12
d ₆ 1.00000 11.42124 30.94061 48.29039 59.30210
d ₁₅ 55.59662 25.85692 13.75365 6.56339 2.50000
d ₁₆ 20.18772 14.53075 11.35844 7.51283 1.55935
d ₂₁ 2.76426 4.80624 7.15711 10.16404 16.30729
d ₂₄ 7.71856 7.83389 6.04720 4.97905 4.27440
d ₂₉ 4.70560 8.31100 10.79320 8.56974 13.14420
.

(Example 15)
r ₁ = 132.6548 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 79.4364 d ₂ = 0.4361
r ₃ = 85.8501 d ₃ = 6.6634 n _d2 = 1.60311 ν _d2 = 60.64
r ₄ = 4.060 × 10 ⁴ d ₄ = 0.2000
r ₅ = 59.6705 d ₅ = 6.1756 n _d3 = 1.49700 ν _d3 = 81.54
r ₆ = 294.2591 d ₆ = (variable)
r ₇ = 98.7402 d ₇ = 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 14.8930 d ₈ = 9.4296
r ₉ = -32.3971 d ₉ = 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 70.8620 d ₁₀ = 2.0091
r ₁₁ = -72.3210 (aspherical surface) d ₁₁ = 0.2000 n _d6 = 1.53508 ν _d6 = 40.94
r ₁₂ = -200.0000 d ₁₂ = 1.2000 n _d7 = 1.69350 ν _d7 = 53.20
r ₁₃ = 67.0853 d ₁₃ = 0.2000
r ₁₄ = 44.8428 d ₁₄ = 6.9613 n _d8 = 1.68893 ν _d8 = 31.07
r ₁₅ = -35.6841 d ₁₅ = (variable)
r ₁₆ = ∞ (aperture) d ₁₆ = (variable)
r ₁₇ = 21.0081 (aspherical surface) d ₁₇ = 2.9255 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₈ = -9.840 × 10 ⁵ d ₁₈ = 0.1774
r ₁₉ = 34.1654 d ₁₉ = 1.1208 n _d10 = 1.77250 ν _d10 = 49.60
r ₂₀ = 14.0687 d ₂₀ = 4.9352 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₁ = -74.9646 d ₂₁ = (variable)
r ₂₂ = -61.8007 d ₂₂ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₃ = 16.0108 d ₂₃ = 1.8375 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₄ = 22.5570 d ₂₄ = (variable)
r ₂₅ = 32.5943 (aspherical surface) d ₂₅ = 4.3313 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = -33.8655 d ₂₆ = 0.1500
r ₂₇ = 53.1963 d ₂₇ = 1.1524 n _d15 = 1.84666 ν _d15 = 23.78
r ₂₈ = 18.3125 d ₂₈ = 3.6734 n _d16 = 1.49700 ν _d16 = 81.54
r ₂₉ = -121.7913 d ₂₉ = (variable)
r ₃₀ = ∞ d ₃₀ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₁ = ∞ d ₃₁ = 1.0000
r ₃₂ = ∞ d ₃₂ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₅ = ∞ d ₃₅ = 1.2400
r ₃₆ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 5.6253 × 10 ^-6
A ₆ = 8.1204 × 10 ^-9
A ₈ = -1.5465 × 10 ^-10
A ₁₀ = 0.0000
Surface 17 K = 0
A ₄ = -1.0911 × 10 ^-5
A ₆ = -8.6347 × 10 ^-10
A ₈ = -3.2657 × 10 ^-11
A ₁₀ = 0.0000
25th face K = 0
A ₄ = -1.8333 × 10 ^-5
A ₆ = -3.1998 × 10 ^-9
A ₈ = 1.0415 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W WS S ST T
f (mm) 7.28638 13.09183 23.29942 41.55110 74.69787
F _NO 2.8000 3.0933 3.5000 3.5000 3.5000
ω (°) 38.41. 13.04. 4.13
d ₆ 1.00000 12.01687 29.52891 47.09799 58.40761
d ₁₅ 56.60227 27.25102 13.50469 7.09969 2.50000
d ₁₆ 20.20946 14.09927 10.84298 7.36903 1.55935
d ₂₁ 2.22975 4.07145 6.73846 9.29928 14.66227
d ₂₄ 8.05739 8.70338 6.54360 6.01591 6.08811
d ₂₉ 6.19420 9.22330 12.55330 8.60639 14.38620
.

(Example 16)
r ₁ = 80.0460 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 57.3690 d ₂ = 0.0798
r ₃ = 56.8758 d ₃ = 6.9751 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 362.0517 d ₄ = 0.2000
r ₅ = 73.3775 d ₅ = 4.4654 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 289.7112 d ₆ = (variable)
r ₇ = 177.0825 d ₇ = 1.5000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 16.8427 d ₈ = 7.9000
r ₉ = -29.2679 (aspherical surface) d ₉ = 1.3643 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 67.6142 d ₁₀ = 3.5642
r ₁₁ = 117.8157 d ₁₁ = 4.8943 n _d6 = 1.72825 ν _d6 = 28.46
r ₁₂ = -31.3298 d ₁₂ = 0.5000
r ₁₃ = -63.4774 d ₁₃ = 1.0000 n _d7 = 1.74400 ν _d7 = 44.78
r ₁₄ = -239.8825 d ₁₄ = (variable)
r ₁₅ = -435.4231 d ₁₅ = 1.2680 n _d8 = 1.72825 ν _d8 = 28.46
r ₁₆ = 514.6994 d ₁₆ = 1.3139
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 20.0387 (aspherical surface) d ₁₈ = 5.6776 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₉ = -73.1240 d ₁₉ = 0.1774
r ₂₀ = 46.3298 d ₂₀ = 1.1410 n _d10 = 1.80440 ν _d10 = 39.59
r ₂₁ = 13.8759 d ₂₁ = 5.4223 n _d11 = 1.60311 ν _d11 = 60.64
r ₂₂ = -120.0020 d ₂₂ = (variable)
r ₂₃ = -55.7471 d ₂₃ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₄ = 11.2108 d ₂₄ = 1.8651 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₅ = 15.9872 d ₂₅ = (variable)
r ₂₆ = 55.1052 d ₂₆ = 2.9459 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₇ = -28.6459 (aspherical surface) d ₂₇ = 0.1500
r ₂₈ = 69.1964 d ₂₈ = 4.5501 n _d15 = 1.60311 ν _d15 = 60.64
r ₂₉ = -13.8791 d ₂₉ = 1.0000 n _d16 = 1.84666 ν _d16 = 23.78
r ₃₀ = -46.4615 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = 8.8395 × 10 ^-6
A ₆ = 5.0711 × 10 ^-9
A ₈ = -1.9545 × 10 ^-11
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -2.0678 × 10 ^-5
A ₆ = -6.4243 × 10 ^-9
A ₈ = 2.3028 × 10 ^-11
A ₁₀ = 0.0000
Surface 27 K = 0
A ₄ = -3.0971 × 10 ^-6
A ₆ = -9.4407 × 10 ^-9
A ₈ = 1.9644 × 10 ^-11
A ₁₀ = 0.0000
Zoom data (∞)
W S T
f (mm) 7.27185 23.29749 74.69992
F _NO 2.8000 3.5000 3.5000
ω (°) 40.17 13.97 4.40
d ₆ 1.36006 30.12912 58.31748
d ₁₄ 54.70456 12.24625 1.70314
d ₁₇ 17.26301 9.52391 1.02608
d ₂₂ 1.50000 6.53585 16.09191
d ₂₅ 7.85799 6.35824 6.81641
d ₃₀ 4.64000 8.84600 7.32400
.

(Example 17)
r ₁ = 84.5614 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 60.9235 d ₂ = 0.1000
r ₃ = 60.9993 d ₃ = 7.7500 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 411.3180 d ₄ = 0.2000
r ₅ = 69.8137 d ₅ = 5.8500 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 273.9185 d ₆ = (variable)
r ₇ = 326.8029 d ₇ = 1.8000 n _d4 = 1.81600 ν _d4 = 46.62
r ₈ = 18.4614 d ₈ = 5.8823
r ₉ = -86.8945 d ₉ = 1.1000 n _d5 = 1.73400 ν _d5 = 51.47
r ₁₀ = 32.9914 d ₁₀ = 5.2210
r ₁₁ = -30.1936 (aspherical surface) d ₁₁ = 1.2000 n _d6 = 1.71300 ν _d6 = 53.87
r ₁₂ = 3.111 × 10 ⁴ d ₁₂ = 0.1500
r ₁₃ = 94.9186 d ₁₃ = 6.1767 n _d7 = 1.69895 ν _d7 = 30.13
r ₁₄ = -27.0373 d ₁₄ = (variable)
r ₁₅ = -754.3167 d ₁₅ = 0.8000 n _d8 = 1.78472 ν _d8 = 25.68
r ₁₆ = 50.7584 d ₁₆ = 2.0000 n _d9 = 1.68893 ν _d9 = 31.07
r ₁₇ = 699.9122 d ₁₇ = 0.7000
r ₁₈ = ∞ (aperture) d ₁₈ = (variable)
r ₁₉ = 19.3389 (aspherical surface) d ₁₉ = 5.5976 n _d10 = 1.49700 ν _d10 = 81.54
r ₂₀ = -64.3089 d ₂₀ = 0.1774
r ₂₁ = 36.8090 d ₂₁ = 1.1410 n _d11 = 1.80440 ν _d11 = 39.59
r ₂₂ = 15.7560 d ₂₂ = 4.3000 n _d12 = 1.49700 ν _d12 = 81.54
r ₂₃ = 6909.3107 d ₂₃ = (variable)
r ₂₄ = -213.9678 d ₂₄ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₅ = 11.9504 d ₂₅ = 3.6757 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₆ = 15.7330 d ₂₆ = (variable)
r ₂₇ = 56.9085 d ₂₇ = 3.2663 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₈ = -49.9335 (aspherical surface) d ₂₈ = 0.1500
r ₂₉ = 48.3454 d ₂₉ = 5.3103 n _d16 = 1.60311 ν _d16 = _60.64
r ₃₀ = -12.9112 d ₃₀ = 0.8500 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₁ = -36.0617 d ₃₁ = (variable)
r ₃₂ = ∞ d ₃₂ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₅ = ∞ d ₃₅ = 1.0000
r ₃₆ = ∞ d ₃₆ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₇ = ∞ d ₃₇ = 1.2400
r ₃₈ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 3.5442 × 10 ^-6
A ₆ = -1.0145 × 10 ^-8
A ₈ = 4.1292 × 10 ^-11
A ₁₀ = 0.0000
19th face K = 0
A ₄ = -2.3122 × 10 ^-5
A ₆ = -1.0925 × 10 ^-9
A ₈ = -1.2640 × 10 ^-10
A ₁₀ = 0.0000
Surface 28 K = 0
A ₄ = -2.8818 × 10 ^-6
A ₆ = -5.4227 × 10 ^-9
A ₈ = -2.8339 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W S T
f (mm) 7.27212 23.29915 74.69940
F _NO 2.8000 3.5000 3.5000
ω (°) 38.44 13.06 4.09
d ₆ 1.36006 31.23645 59.54246
d ₁₄ 52.32231 11.30384 1.70314
d ₁₈ 17.20275 8.82296 1.02608
d ₂₃ 1.50000 6.61710 16.48589
d ₂₆ 6.17485 5.37142 6.39230
d ₃₁ 2.40000 6.46400 3.36900
.

(Example 18)
r ₁ = 85.6717 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 61.4682 d ₂ = 0.1000
r ₃ = 61.7093 d ₃ = 7.7500 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 391.3879 d ₄ = 0.2000
r ₅ = 71.8120 d ₅ = 5.8500 n _d3 = 1.60311 ν _d3 = 60.64
r ₆ = 318.2499 d ₆ = (variable)
r ₇ = 360.3572 d ₇ = 1.8000 n _d4 = 1.81600 ν _d4 = 46.62
r ₈ = 18.8770 d ₈ = 5.9565
r ₉ = -91.8447 d ₉ = 1.1000 n _d5 = 1.73400 ν _d5 = 51.47
r ₁₀ = 33.5783 d ₁₀ = 5.2551
r ₁₁ = -31.3548 (aspherical surface) d ₁₁ = 1.2000 n _d6 = 1.71300 ν _d6 = 53.87
r ₁₂ = 4.805 × 10 ⁴ d ₁₂ = 0.1500
r ₁₃ = 97.5840 d ₁₃ = 6.2516 n _d7 = 1.69895 ν _d7 = 30.13
r ₁₄ = -27.8035 d ₁₄ = (variable)
r ₁₅ = ∞ d ₁₅ = 1.8000 n _d8 = 1.78472 ν _d8 = 25.68
r ₁₆ = 268.7641 (aspherical surface) d ₁₆ = 1.0000
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 18.6304 (aspherical surface) d ₁₈ = 5.6253 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₉ = -57.6238 d ₁₉ = 0.1774
r ₂₀ = 34.9774 d ₂₀ = 1.1410 n _d10 = 1.80440 ν _d10 = 39.59
r ₂₁ = 14.9385 d ₂₁ = 4.3000 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₂ = 4295.3319 d ₂₂ = (variable)
r ₂₃ = -226.3830 d ₂₃ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₄ = 11.9132 d ₂₄ = 3.6481 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₅ = 15.2759 d ₂₅ = (variable)
r ₂₆ = 54.3162 d ₂₆ = 3.3130 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₇ = -51.5747 (aspherical surface) d ₂₇ = 0.1500
r ₂₈ = 49.4131 d ₂₈ = 5.2625 n _d15 = 1.60311 ν _d15 = 60.64
r ₂₉ = -13.1129 d ₂₉ = 0.8500 n _d16 = 1.84666 ν _d16 = 23.78
r ₃₀ = -36.5139 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 11th surface K = 0
A ₄ = 3.5400 × 10 ^-6
A ₆ = -7.6377 × 10 ^-9
A ₈ = 4.0209 × 10 ^-11
A ₁₀ = 0.0000
16th surface K = 0
A ₄ = -4.0343 × 10 ^-7
A ₆ = 2.7672 × 10 ^-8
A ₈ = -2.5380 × 10 ^-10
A ₁₀ = 0.0000
18th face K = 0
A ₄ = -2.6388 × 10 ^-5
A ₆ = -1.7329 × 10 ^-9
A ₈ = -1.6305 × 10 ^-10
A ₁₀ = 0.0000
Surface 27 K = 0
A ₄ = -3.4938 × 10 ^-6
A ₆ = -5.9935 × 10 ^-9
A ₈ = -2.8356 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W S T
f (mm) 7.27244 23.30032 74.70039
F _NO 2.8000 3.5000 3.5000
ω (°) 38.45 13.05 4.09
d ₆ 1.36006 31.15403 59.61613
d ₁₄ 52.28998 11.32834 1.70314
d ₁₇ 17.27794 8.92919 1.02608
d ₂₂ 1.50000 6.44912 16.47111
d ₂₅ 6.18489 5.46432 6.07561
d ₃₀ 2.39700 6.50900 3.82700
.

(Example 19)
r ₁ = 102.8951 d ₁ = 2.2000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 61.5389 d ₂ = 11.0000 n _d2 = 1.49700 ν _d2 = 81.54
r ₃ = -641.2805 d ₃ = 0.2750
r ₄ = 51.4180 d ₄ = 6.1875 n _d3 = 1.69680 ν _d3 = 55.53
r ₅ = 146.6226 d ₅ = (variable)
r ₆ = 148.7220 d ₆ = 1.9010 n _d4 = 1.83400 ν _d4 = 37.16
r ₇ = 15.1960 d ₇ = 8.2500
r ₈ = -17.1556 d ₈ = 1.6500 n _d5 = 1.80610 ν _d5 = 40.92
r ₉ = 15.0399 (aspherical surface) d ₉ = 2.0625
r ₁₀ = 58.8129 d ₁₀ = 3.4375 n _d6 = 1.68893 ν _d6 = 31.07
r ₁₁ = -74.3150 d ₁₁ = 0.2062
r ₁₂ = 241.0544 d ₁₂ = 4.8125 n _d7 = 1.68893 ν _d7 = 31.07
r ₁₃ = -21.3830 d ₁₃ = (variable)
r ₁₄ = ∞ (aperture) d ₁₄ = (variable)
r ₁₅ = 37.4279 (aspherical surface) d ₁₅ = 3.4375 n _d8 = 1.49700 ν _d8 = 81.54
r ₁₆ = -462.8778 d ₁₆ = 0.2062
r ₁₇ = 15.8702 d ₁₇ = 5.5000 n _d9 = 1.59551 ν _d9 = 39.24
r ₁₈ = 79.4628 d ₁₈ = 1.3750 n _d10 = 1.80610 ν _d10 = 40.92
r ₁₉ = 14.4884 d ₁₉ = (variable)
r ₂₀ = 26.6553 d ₂₀ = 4.1250 n _d11 = 1.83400 ν _d11 = 37.16
r ₂₁ = 147.2888 d ₂₁ = 0.4125
r ₂₂ = 142.7176 d ₂₂ = 1.3750 n _d12 = 1.84666 ν _d12 = 23.78
r ₂₃ = 17.8989 d ₂₃ = 6.1875 n _d13 = 1.49700 ν _d13 = 81.54
r ₂₄ = -22.9886 (aspherical surface) d ₂₄ = (variable)
r ₂₅ = ∞ d ₂₅ = 23.3750 n _d14 = 1.51633 ν _d14 = 64.14
r ₂₆ = ∞ d ₂₆ = 1.3750
r ₂₇ = ∞ d ₂₇ = 2.2000 n _d15 = 1.54771 ν _d15 = 62.84
r ₂₈ = ∞ d ₂₈ = 1.3750
r ₂₉ = ∞ d ₂₉ = 1.0313 n _d16 = 1.52300 ν _d16 = 55.00
r ₃₀ = ∞ d ₃₀ = 3.2468
r ₃₁ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = -1.4335 × 10 ^-4
A ₆ = 3.6008 × 10 ^-7
A ₈ = -1.5707 × 10 ^-9
A ₁₀ = 0.0000
15th surface K = 0
A ₄ = -8.3514 × 10 ^-6
A ₆ = -6.4776 × 10 ^-10
A ₈ = -1.3217 × 10 ^-11
A ₁₀ = 0.0000
24th face K = 0
A ₄ = 2.1082 × 10 ^-5
A ₆ = 9.2526 × 10 ^-8
A ₈ = -1.4509 × 10 ^-9
A ₁₀ = 6.8600 × 10 ^-12
Zoom data (∞)
W S T
f (mm) 7.15436 18.83672 50.05002
F _NO 2.0482 2.3536 2.5012
ω (°) 38.38 15.78 6.16
d ₅ 1.37500 23.10024 44.56543
d ₁₃ 53.62605 19.09389 6.13762
d ₁₄ 23.19509 10.31787 3.56923
d ₁₉ 7.00580 12.70882 18.49477
d ₂₄ 1.19821 7.55450 9.33878
.

(Example 20)
r ₁ = 155.9824 d ₁ = 1.7875 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 61.8424 d ₂ = 11.0000 n _d2 = 1.61800 ν _d2 = 63.33
r ₃ = -600.9530 d ₃ = 0.2750
r ₄ = 47.5178 d ₄ = 6.1875 n _d3 = 1.69680 ν _d3 = 55.53
r ₅ = 121.5999 d ₅ = (variable)
r ₆ = 119.2914 d ₆ = 1.3750 n _d4 = 1.80610 ν _d4 = 40.92
r ₇ = 13.2227 (aspherical surface) d ₇ = 8.2500
r ₈ = -32.4710 d ₈ = 1.6500 n _d5 = 1.83400 ν _d5 = 37.16
r ₉ = 39.0123 d ₉ = 1.3750
r ₁₀ = 165.6443 d ₁₀ = 1.3750 n _d6 = 1.57501 ν _d6 = 41.50
r ₁₁ = 20.0406 d ₁₁ = 7.1500 n _d7 = 1.75520 ν _d7 = 27.51
r ₁₂ = -48.8507 d ₁₂ = (variable)
r ₁₃ = ∞ (aperture) d ₁₃ = (variable)
r ₁₄ = 30.8548 d ₁₄ = 3.4375 n _d8 = 1.80518 ν _d8 = 25.42
r ₁₅ = -89.0085 d ₁₅ = 0.2062
r ₁₆ = 38.9337 (aspherical surface) d ₁₆ = 4.4000 n _d9 = 1.80610 ν _d9 = 40.92
r ₁₇ = -94.3851 d ₁₇ = 1.3750 n _d10 = 1.84666 ν _d10 = 23.78
r ₁₈ = 32.5308 d ₁₈ = (variable)
r ₁₉ = -57.6645 d ₁₉ = 2.7500 n _d11 = 1.77250 ν _d11 = 49.60
r ₂₀ = -47.1601 d ₂₀ = 1.3750 n _d12 = 1.60342 ν _d12 = 38.03
r ₂₁ = 30.6668 d ₂₁ = (variable)
r ₂₂ = -228.3337 d ₂₂ = 1.3750 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₃ = 19.0716 d ₂₃ = 6.1875 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₄ = -31.2823 (aspherical surface) d ₂₄ = 0.2062
r ₂₅ = 36.1622 d ₂₅ = 6.1875 n _d15 = 1.69350 ν _d15 = 53.21
r ₂₆ = -35.8359 d ₂₆ = (variable)
r ₂₇ = ∞ d ₂₇ = 23.3750 n _d16 = 1.51633 ν _d16 = 64.14
r ₂₈ = ∞ d ₂₈ = 1.3750
r ₂₉ = ∞ d ₂₉ = 2.2000 n _d17 = 1.54771 ν _d17 = 62.84
r ₃₀ = ∞ d ₃₀ = 1.3750
r ₃₁ = ∞ d ₃₁ = 1.0313 n _d18 = 1.52300 ν _d18 = 55.00
r ₃₂ = ∞ d ₃₂ = 3.2377
r ₃₃ = ∞
Aspheric coefficient 7th surface K = 0
A ₄ = -2.0811 × 10 ^-5
A ₆ = -9.3584 × 10 ^-10
A ₈ = -9.2039 × 10 ^-10
A ₁₀ = 0.0000
16th surface K = 0
A ₄ = -9.0277 × 10 ^-6
A ₆ = 2.1013 × 10 ^-8
A ₈ = -5.4554 × 10 ^-10
A ₁₀ = 2.6012 × 10 ^-12
24th face K = 0
A ₄ = -1.8657 × 10 ^-6
A ₆ = 2.3003 × 10 ^-8
A ₈ = -5.0119 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W S T
f (mm) 7.16206 18.83631 50.04733
F _NO 2.0290 2.3673 2.8226
ω (°) 38.34 15.98 6.16
d ₅ 1.37500 20.39279 42.36136
d ₁₂ 49.98780 14.95968 7.89768
d ₁₃ 20.74150 12.47266 4.81483
d ₁₈ 2.75692 5.61404 10.58915
d ₂₁ 7.73772 5.38351 6.87877
d ₂₆ 2.75000 9.90480 11.70852
.

(Example 21)
r ₁ = 104.3405 d ₁ = 2.2000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 59.5725 d ₂ = 11.0000 n _d2 = 1.49700 ν _d2 = 81.54
r ₃ = -1321.3547 d ₃ = 0.2750
r ₄ = 47.5960 d ₄ = 6.1875 n _d3 = 1.69680 ν _d3 = 55.53
r ₅ = 136.8909 d ₅ = (variable)
r ₆ = 140.6680 d ₆ = 1.9010 n _d4 = 1.80610 ν _d4 = 40.92
r ₇ = 13.7491 (aspherical surface) d ₇ = 6.1875
r ₈ = -60.0958 d ₈ = 1.6500 n _d5 = 1.83400 ν _d5 = 37.16
r ₉ = 61.9207 d ₉ = 4.1250
r ₁₀ = -21.5206 d ₁₀ = 1.3750 n _d6 = 1.63930 ν _d6 = 44.87
r ₁₁ = 56.5075 d ₁₁ = 3.4375
r ₁₂ = 96.6074 d ₁₂ = 5.5000 n _d7 = 1.80100 ν _d7 = 34.97
r ₁₃ = -25.9673 d ₁₃ = (variable)
r ₁₄ = ∞ (aperture) d ₁₄ = 2.7500
r ₁₅ = -40.0734 d ₁₅ = 1.2375 n _d8 = 1.60311 ν _d8 = 60.64
r ₁₆ = -78.4453 d ₁₆ = (variable)
r ₁₇ = 34.7554 d ₁₇ = 4.8125 n _d9 = 1.80809 ν _d9 = _22.76
r ₁₈ = 1028.4306 d ₁₈ = 0.2062
r ₁₉ = 60.9355 (aspheric surface) d ₁₉ = 4.4000 n _d10 = 1.80610 ν _d10 = 40.92
r ₂₀ = -29.1117 d ₂₀ = 1.3750 n _d11 = 1.84666 ν _d11 = 23.78
r ₂₁ = 127.3373 d ₂₁ = (variable)
r ₂₂ = 32.2756 d ₂₂ = 2.7500 n _d12 = 1.60342 ν _d12 = 38.03
r ₂₃ = 145.1897 d ₂₃ = 1.3750 n _d13 = 1.77250 ν _d13 = 49.60
r ₂₄ = 16.7202 d ₂₄ = (variable)
r ₂₅ = 33.5170 d ₂₅ = 7.5625 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = -27.9038 (aspherical surface) d ₂₆ = 0.2062
r ₂₇ = 69.1174 d ₂₇ = 1.3750 n _d15 = 1.84666 ν _d15 = 23.78
r ₂₈ = 19.6221 d ₂₈ = 6.1875 n _d16 = 1.49700 ν _d16 = 81.54
r ₂₉ = -57.6668 d ₂₉ = (variable)
r ₃₀ = ∞ d ₃₀ = 23.3750 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₁ = ∞ d ₃₁ = 1.3750
r ₃₂ = ∞ d ₃₂ = 2.2000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₃ = ∞ d ₃₃ = 1.3750
r ₃₄ = ∞ d ₃₄ = 1.0313 n _d19 = 1.52300 ν _d19 = 55.00
r ₃₅ = ∞ d ₃₅ = 3.2477
r ₃₆ = ∞
Aspheric coefficient 7th surface K = 0
A ₄ = -9.7269 × 10 ^-6
A ₆ = -1.1309 × 10 ^-7
A ₈ = 6.4969 × 10 ^-10
A ₁₀ = 0.0000
19th face K = 0
A ₄ = -7.1713 × 10 ^-6
A ₆ = -1.9289 × 10 ^-9
A ₈ = -3.9414 × 10 ^-11
A ₁₀ = 2.4197 × 10 ^-13
26th face K = 0
A ₄ = -5.4190 × 10 ^-7
A ₆ = -2.7019 × 10 ^-8
A ₈ = -3.8924 × 10 ^-11
A ₁₀ = 0.0000
Zoom data (∞)
W S T
f (mm) 7.14571 18.85522 50.04974
F _NO 2.0047 2.3661 2.8509
ω (°) 38.44 15.98 6.16
d ₅ 1.37500 21.94583 42.47373
d ₁₃ 50.65754 14.25486 5.45806
d ₁₆ 21.33520 12.38223 5.88901
d ₂₁ 2.74731 5.18781 10.57000
d ₂₄ 7.02907 7.05019 6.86418
d ₂₉ 2.75000 9.01050 10.53508
.

(Example 22)
r ₁ = 131.8770 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 77.6142 d ₂ = 0.2000
r ₃ = 80.8510 d ₃ = 6.3796 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -2977.8302 d ₄ = 0.2000
r ₅ = 67.0321 d ₅ = 5.0727 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 266.3144 d ₆ = (variable)
r ₇ = 1181.5043 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 17.1175 d ₈ = 8.6482
r ₉ = -77.8867 (aspherical surface) d ₉ = 0.2000 n _d5 = 1.53508 ν _d5 = 40.94
r ₁₀ = -246.1158 d ₁₀ = 1.3000 n _d6 = 1.77250 ν _d6 = 49.60
r ₁₁ = 430.0786 d ₁₁ = 4.1745
r ₁₂ = -24.0715 d ₁₂ = 1.1790 n _d7 = 1.48749 ν _d7 = 70.23
r ₁₃ = -346.5320 d ₁₃ = 4.4844 n _d8 = 1.84666 ν _d8 = 23.78
r ₁₄ = -42.2965 d ₁₄ = (variable)
r ₁₅ = -13.2198 d ₁₅ = 1.3000 n _d9 = 1.77250 ν _d9 = 49.60
r ₁₆ = -14.9920 d ₁₆ = 1.0969
r ₁₇ = ∞ (aperture) d ₁₇ = (variable)
r ₁₈ = 23.9865 (aspherical surface) d ₁₈ = 5.3859 n _d10 = 1.49700 ν _d10 = 81.54
r ₁₉ = -62.7302 d ₁₉ = 0.4217
r ₂₀ = 65.9532 d ₂₀ = 1.1010 n _d11 = 1.80610 ν _d11 = 40.92
r ₂₁ = 18.5852 d ₂₁ = 5.1465 n _d12 = 1.49700 ν _d12 = 81.54
r ₂₂ = -44.8828 d ₂₂ = (variable)
r ₂₃ = -97.1974 d ₂₃ = 0.9000 n _d13 = 1.51633 ν _d13 = 64.14
r ₂₄ = 13.4425 d ₂₄ = 3.0840 n _d14 = 1.84666 ν _d14 = 23.78
r ₂₅ = 18.2242 d ₂₅ = (variable)
r ₂₆ = 22.8739 (aspherical surface) d ₂₆ = 4.4524 n _d15 = 1.49700 ν _d15 = 81.54
r ₂₇ = -32.9476 d ₂₇ = 0.1500
r ₂₈ = 111.9927 d ₂₈ = 3.9237 n _d16 = 1.61800 ν _d16 = 63.33
r ₂₉ = -19.6931 d ₂₉ = 1.0000 n _d17 = 1.84666 ν _d17 = 23.78
r ₃₀ = -150.1546 d ₃₀ = (variable)
r ₃₁ = ∞ d ₃₁ = 16.0000 n _d18 = 1.51633 ν _d18 = 64.14
r ₃₂ = ∞ d ₃₂ = 1.0000
r ₃₃ = ∞ d ₃₃ = 2.6000 n _d19 = 1.54771 ν _d19 = 62.84
r ₃₄ = ∞ d ₃₄ = 1.0000
r ₃₅ = ∞ d ₃₅ = 0.7500 n _d20 = 1.51633 ν _d20 = 64.14
r ₃₆ = ∞ d ₃₆ = 1.2400
r ₃₇ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = 2.1755 × 10 ^-5
A ₆ = 7.8908 × 10 ^-8
A ₈ = -3.9978 × 10 ^-10
A ₁₀ = 1.3455 × 10 ^-12
18th face K = 0
A ₄ = -1.6485 × 10 ^-5
A ₆ = 1.0262 × 10 ^-8
A ₈ = -3.9805 × 10 ^-10
A ₁₀ = 3.5368 × 10 ^-12
26th face K = 0
A ₄ = -1.4825 × 10 ^-5
A ₆ = -5.9281 × 10 ^-8
A ₈ = 7.7542 × 10 ^-10
A ₁₀ = -4.4522 × 10 ^-12
Zoom data (∞)
W WS S ST T
f (mm) 7.25994 12.99981 23.29962 41.72909 74.74765
F _NO 2.8000 3.3689 3.5000 3.5000 3.5000
ω (°) 38.50. 13.16. 4.16
d ₆ 1.61417 10.64862 30.77400 47.23205 58.71613
d ₁₄ 44.70529 23.26327 13.31755 6.20175 2.00079
d ₁₇ 17.54504 10.44417 7.81832 5.52178 1.09606
d ₂₂ 1.50000 7.82981 12.51540 16.74044 22.56134
d ₂₅ 10.82401 10.71984 7.99123 5.55224 4.75986
d ₃₀ 4.54790 5.42312 6.09200 6.60249 5.99969
.

(Example 23)
r ₁ = 120.4727 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 73.3708 d ₂ = 0.2000
r ₃ = 76.1454 d ₃ = 6.5370 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = 2489.4366 d ₄ = 0.2000
r ₅ = 67.2263 d ₅ = 5.1710 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 274.6988 d ₆ = (variable)
r ₇ = 714.7087 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 16.1327 d ₈ = 8.7770
r ₉ = -81.5087 (aspherical surface) d ₉ = 1.5000 n _d5 = 1.69350 ν _d5 = 53.20
r ₁₀ = -1305.7058 d ₁₀ = 4.0368
r ₁₁ = -20.2734 d ₁₁ = 1.1790 n _d6 = 1.48749 ν _d6 = 70.23
r ₁₂ = -62.9405 d ₁₂ = 4.8993 n _d7 = 1.84666 ν _d7 = 23.78
r ₁₃ = -30.8273 d ₁₃ = (variable)
r ₁₄ = -15.4268 d ₁₄ = 1.3000 n _d8 = 1.77250 ν _d8 = 49.60
r ₁₅ = -18.4448 d ₁₅ = 1.1025
r ₁₆ = ∞ (aperture) d ₁₆ = (variable)
r ₁₇ = 25.1535 (aspherical surface) d ₁₇ = 5.5136 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₈ = -55.2846 d ₁₈ = 1.5487
r ₁₉ = 64.5304 d ₁₉ = 1.1010 n _d10 = 1.80610 ν _d10 = 40.92
r ₂₀ = 18.9507 d ₂₀ = 5.1163 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₁ = -43.1776 d ₂₁ = (variable)
r ₂₂ = -77.9341 d ₂₂ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₃ = 13.4277 d ₂₃ = 3.4850 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₄ = 17.9962 d ₂₄ = (variable)
r ₂₅ = 21.5792 (aspherical surface) d ₂₅ = 4.5936 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = -34.1855 d ₂₆ = 0.1500
r ₂₇ = 300.7621 d ₂₇ = 4.4791 n _d15 = 1.61800 ν _d15 = 63.33
r ₂₈ = -17.4341 d ₂₈ = 1.0000 n _d16 = 1.84666 ν _d16 = 23.78
r ₂₉ = -75.6852 d ₂₉ = (variable)
r ₃₀ = ∞ d ₃₀ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₁ = ∞ d ₃₁ = 1.0000
r ₃₂ = ∞ d ₃₂ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₅ = ∞ d ₃₅ = 1.2400
r ₃₆ = ∞
Aspheric coefficient 9th surface K = 0
A ₄ = 1.8629 × 10 ^-5
A ₆ = 6.9168 × 10 ^-8
A ₈ = -2.7327 × 10 ^-10
A ₁₀ = 1.2121 × 10 ^-12
Surface 17 K = 0
A ₄ = -1.6089 × 10 ^-5
A ₆ = -2.0073 × 10 ^-8
A ₈ = 3.8142 × 10 ^-10
A ₁₀ = -2.1082 × 10 ^-12
25th face K = 0
A ₄ = -1.5463 × 10 ^-5
A ₆ = -2.6231 × 10 ^-8
A ₈ = 2.4043 × 10 ^-10
A ₁₀ = -9.6547 × 10 ^-13
Zoom data (∞)
W S T
f (mm) 7.25982 23.29910 74.74396
F _NO 2.8000 3.5000 3.5000
ω (°) 40.41 14.08 4.46
d ₆ 1.59627 31.97645 59.22440
d ₁₃ 44.75692 12.18599 2.03777
d ₁₆ 17.39564 8.62546 1.04694
d ₂₁ 1.58062 11.29335 21.65579
d ₂₄ 9.55837 6.83300 4.68713
d ₂₉ 4.66609 6.44892 5.81086
.

(Example 24)
r ₁ = 128.7222 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 76.5762 d ₂ = 0.1990
r ₃ = 79.6940 d ₃ = 6.4626 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -2955.9452 d ₄ = 0.2000
r ₅ = 67.1272 d ₅ = 5.0669 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 263.8928 d ₆ = (variable)
r ₇ = 380.2582 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 15.9616 d ₈ = 8.7181
r ₉ = -59.9828 d ₉ = 1.5000 n _d5 = 1.69350 ν _d5 = 53.20
r ₁₀ = -301.9443 (aspherical surface) d ₁₀ = 3.8167
r ₁₁ = -20.5627 d ₁₁ = 1.1790 n _d6 = 1.48749 ν _d6 = 70.23
r ₁₂ = -59.0207 d ₁₂ = 5.1126 n _d7 = 1.84666 ν _d7 = 23.78
r ₁₃ = -30.2745 d ₁₃ = (variable)
r ₁₄ = -15.4364 d ₁₄ = 1.3000 n _d8 = 1.77250 ν _d8 = 49.60
r ₁₅ = -18.6107 d ₁₅ = 1.1009
r ₁₆ = ∞ (aperture) d ₁₆ = (variable)
r ₁₇ = 25.8357 (aspherical surface) d ₁₇ = 5.4824 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₈ = -58.3524 d ₁₈ = 1.9683
r ₁₉ = 67.3450 d ₁₉ = 1.1010 n _d10 = 1.80610 ν _d10 = 40.92
r ₂₀ = 19.5738 d ₂₀ = 5.1220 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₁ = -40.5031 d ₂₁ = (variable)
r ₂₂ = -94.9007 d ₂₂ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₃ = 13.4666 d ₂₃ = 3.4715 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₄ = 17.9806 d ₂₄ = (variable)
r ₂₅ = 20.7610 (aspherical surface) d ₂₅ = 4.5646 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = -34.2142 d ₂₆ = 0.1500
r ₂₇ = 513.7109 d ₂₇ = 4.4703 n _d15 = 1.61800 ν _d15 = 63.33
r ₂₈ = -17.8110 d ₂₈ = 1.0000 n _d16 = 1.84666 ν _d16 = 23.78
r ₂₉ = -83.6823 d ₂₉ = (variable)
r ₃₀ = ∞ d ₃₀ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₁ = ∞ d ₃₁ = 1.0000
r ₃₂ = ∞ d ₃₂ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₅ = ∞ d ₃₅ = 1.2400
r ₃₆ = ∞
Aspheric coefficient 10th surface K = 0
A ₄ = -1.7426 × 10 ^-5
A ₆ = -6.5228 × 10 ^-8
A ₈ = 2.7392 × 10 ^-10
A ₁₀ = -7.9412 × 10 ^-13
Surface 17 K = 0
A ₄ = -1.6148 × 10 ^-5
A ₆ = 6.2346 × 10 ^-9
A ₈ = -1.2987 × 10 ^-10
A ₁₀ = 1.1435 × 10 ^-12
25th face K = 0
A ₄ = -1.7043 × 10 ^-5
A ₆ = -3.2560 × 10 ^-8
A ₈ = 2.8184 × 10 ^-10
A ₁₀ = -1.6473 × 10 ^-12
Zoom data (∞)
W S T
f (mm) 7.25999 23.30005 74.75174
F _NO 2.8000 3.5000 3.5000
ω (°) 38.46 13.17 4.17
d ₆ 1.60767 32.04855 59.57895
d ₁₃ 44.71134 12.27559 2.02865
d ₁₆ 17.18153 8.38526 1.03922
d ₂₁ 1.50000 11.41739 21.29066
d ₂₄ 9.89355 6.80745 4.59258
d ₂₉ 4.61028 6.57526 6.26289
.

(Example 25)
r ₁ = 125.0583 d ₁ = 2.6000 n _d1 = 1.84666 ν _d1 = 23.78
r ₂ = 75.8265 d ₂ = 0.2052
r ₃ = 78.8734 d ₃ = 6.6854 n _d2 = 1.49700 ν _d2 = 81.54
r ₄ = -1567.5318 d ₄ = 0.2000
r ₅ = 66.2728 d ₅ = 5.0118 n _d3 = 1.69680 ν _d3 = 55.53
r ₆ = 235.6712 d ₆ = (variable)
r ₇ = 304.4445 d ₇ = 1.7000 n _d4 = 1.77250 ν _d4 = 49.60
r ₈ = 16.9298 d ₈ = 8.3012
r ₉ = -67.4212 d ₉ = 1.5000 n _d5 = 1.77250 ν _d5 = 49.60
r ₁₀ = 58.4741 d ₁₀ = 4.0559
r ₁₁ = -33.1641 d ₁₁ = 1.1790 n _d6 = 1.48749 ν _d6 = 70.23
r ₁₂ = 123.4460 d ₁₂ = 4.7343 n _d7 = 1.68893 ν _d7 = 31.07
r ₁₃ = -32.8044 (aspherical surface) d ₁₃ = (variable)
r ₁₄ = -13.3788 d ₁₄ = 1.3000 n _d8 = 1.77250 ν _d8 = 49.60
r ₁₅ = -14.1982 d ₁₅ = 0.9997
r ₁₆ = ∞ (aperture) d ₁₆ = (variable)
r ₁₇ = 21.1913 (aspherical surface) d ₁₇ = 5.3343 n _d9 = 1.49700 ν _d9 = 81.54
r ₁₈ = -53.8005 d ₁₈ = 0.3147
r ₁₉ = 53.6050 d ₁₉ = 1.1010 n _d10 = 1.80610 ν _d10 = 40.92
r ₂₀ = 16.0840 d ₂₀ = 5.1135 n _d11 = 1.49700 ν _d11 = 81.54
r ₂₁ = -142.9938 d ₂₁ = (variable)
r ₂₂ = -42.8783 d ₂₂ = 0.9000 n _d12 = 1.51633 ν _d12 = 64.14
r ₂₃ = 13.9697 d ₂₃ = 3.3288 n _d13 = 1.84666 ν _d13 = 23.78
r ₂₄ = 21.2945 d ₂₄ = (variable)
r ₂₅ = 31.1501 (aspherical surface) d ₂₅ = 4.3266 n _d14 = 1.49700 ν _d14 = 81.54
r ₂₆ = -23.5905 d ₂₆ = 0.1500
r ₂₇ = 911.4978 d ₂₇ = 4.2792 n _d15 = 1.61800 ν _d15 = 63.33
r ₂₈ = -15.3539 d ₂₈ = 1.0000 n _d16 = 1.84666 ν _d16 = 23.78
r ₂₉ = -50.5690 d ₂₉ = (variable)
r ₃₀ = ∞ d ₃₀ = 16.0000 n _d17 = 1.51633 ν _d17 = 64.14
r ₃₁ = ∞ d ₃₁ = 1.0000
r ₃₂ = ∞ d ₃₂ = 2.6000 n _d18 = 1.54771 ν _d18 = 62.84
r ₃₃ = ∞ d ₃₃ = 1.0000
r ₃₄ = ∞ d ₃₄ = 0.7500 n _d19 = 1.51633 ν _d19 = 64.14
r ₃₅ = ∞ d ₃₅ = 1.2400
r ₃₆ = ∞
Aspheric coefficient 13th surface K = 0
A ₄ = -7.0043 × 10 ^-6
A ₆ = -5.4249 × 10 ^-9
A ₈ = 3.0262 × 10 ^-12
A ₁₀ = 0.0000
Surface 17 K = 0
A ₄ = -1.8414 × 10 ^-5
A ₆ = -1.4788 × 10 ^-8
A ₈ = 5.9114 × 10 ^-11
A ₁₀ = 0.0000
25th face K = 0
A ₄ = -2.1192 × 10 ^-5
A ₆ = -1.3690 × 10 ^-8
A ₈ = 1.3573 × 10 ^-10
A ₁₀ = 0.0000
Zoom data (∞)
W S T
f (mm) 2.8000 3.5000 3.5000
F _NO 7.26001 23.29997 74.74863
ω (°) 38.37 13.00 4.12
d ₆ 1.71542 30.14291 58.15917
d ₁₃ 44.90072 12.40034 2.55088
d ₁₆ 19.05859 8.36633 0.99888
d ₂₁ 1.50000 12.21200 22.72088
d ₂₄ 8.15011 6.36382 5.19171
d ₂₉ 4.65995 6.42650 4.45718
.

  FIGS. 26 to 50 show aberration diagrams of the above Examples 1 to 25 when focusing on an object point at infinity. In these aberration diagrams, (a) shows the wide-angle end, (b) the intermediate state, and (c) spherical aberration SA, astigmatism AS, distortion DT, and lateral chromatic aberration CC at the telephoto end. In the figure, “FIY” represents the image height.

Next, the values of conditional expressions (1) to (14) in the above-described embodiments are shown below.
Conditional Example Example 1 Example 2 Example 3 Example 4 Example 5
(1) 9.303 9.549 9.718 9.690 9.615
(2) 0.0280 0.0280 0.0280 -0.0019 -0.0019
(3) 5.104 5.097 5.172 5.302 5.296
(4) -0.331 -0.122 -0.068 -0.171 -0.175
(5) 0.581 0.570 0.557 0.594 0.610
(6) 10.296 10.296 10.296 10.296 10.296
(7) -0.287 -0.288 -0.269 -0.285 -0.281
(8) 0.058 0.182 0.151 0.068 -0.039
(9) -0.010 0.085 0.159 0.235 0.257
(10) 1.637 1.349 1.465 1.724 1.691
(11) 0.306 0.069 -0.139 -0.618 -0.545
(12) 2.846 2.846 2.891 2.846 2.956
(13) 2.800 2.800 2.800 2.800 2.800
(14) 2.984 3.206 3.124 3.060 3.066
.

Conditional Example Example 6 Example 7 Example 8 Example 9 Example 10
(1) 9.257 9.346 9.311 9.123 9.260
(2) 0.0280 0.0280 0.0280 0.0280 0.0280
(3) 5.096 5.073 5.202 5.373 5.163
(4) -0.366 -0.508 -0.366 -0.750 -0.362
(5) 0.592 0.566 0.610 0.643 0.610
(6) 10.297 10.296 10.296 10.295 10.297
(7) -0.274 -0.297 -0.275 -0.326 -0.257
(8) 0.075 0.264 0.034 0.524 0.143
(9) 0.015 0.057 0.190 0.315 -0.034
(10) 1.744 2.059 1.668 2.280 1.622
(11) 0.223 -0.117 0.000 ---- 0.274
(12) 2.834 2.798 2.789 2.475 2.848
(13) 2.800 2.800 2.800 2.800 2.800
(14) 2.940 2.982 3.003 2.839 3.014
.

Conditional Example 11 Example 12 Example 13 Example 14 Example 15
(1) 9.978 9.887 9.754 10.142 9.704
(2) 0.0280 0.0280 0.0280 0.0280 0.0280
(3) 5.452 5.330 5.184 5.300 5.219
(4) -0.138 -0.156 -0.052 -0.096 -0.061
(5) 0.591 0.576 0.547 0.502 0.539
(6) 10.178 10.158 10.265 10.191 10.252
(7) -0.255 -0.261 -0.334 -0.315 -0.306
(8) 0.177 0.253 0.187 0.302 0.187
(9) 0.055 0.123 0.366 0.455 0.439
(10) 1.478 1.495 1.711 1.685 1.696
(11) -0.078 -0.157 -0.444 -0.454 -0.566
(12) 2.784 2.334 2.954 2.818 3.041
(13) 2.800 2.800 2.800 2.800 2.800
(14) 3.225 3.122 3.289 3.030 2.986
.

Conditional Example Example 16 Example 17 Example 18 Example 19 Example 20
(1) 9.110 9.595 9.707 7.465 7.644
(2) 0.0280 0.0280 0.0280 0.0280 0.0051
(3) 4.827 5.289 5.296 3.927 3.727
(4) -0.075 -0.149 -0.153 0.090 0.026
(5) 0.542 0.603 0.589 0.704 0.584
(6) 10.273 10.272 10.272 6.996 6.988
(7) -0.286 -0.270 -0.264 -0.294 -0.346
(8) 0.149 0.235 0.238 0.045 0.606
(9) 0.165 0.060 0.088 0.415 0.562
(10) 1.376 1.470 1.481 1.784 1.448
(11) -0.139 -0.108 -0.120 ---- -0.736
(12) 2.834 2.525 2.525 3.454 3.665
(13) 2.800 2.800 2.800 2.048 2.029
(14) 2.817 3.103 3.122 3.078 2.989
.

Conditional Example 21 Example 22 Example 23 Example 24 Example 25
(1) 7.409 9.448 8.780 9.391 9.275
(2) 0.0280 0.0280 0.0280 0.0280 0.0280
(3) 3.736 5.191 4.884 5.270 5.131
(4) 0.091 -0.337 -0.349 -0.358 -0.333
(5) 0.656 0.578 0.596 0.605 0.585
(6) 7.004 10.296 10.296 10.296 10.296
(7) -0.490 -0.291 -0.281 -0.280 -0.301
(8) -0.102 0.077 0.045 0.056 0.054
(9) 0.504 0.088 0.070 0.102 -0.011
(10) 1.404 1.495 1.386 1.467 1.642
(11) -0.693 0.419 0.316 0.332 0.287
(12) 3.675 2.826 2.842 2.834 2.841
(13) 2.005 2.800 2.800 2.800 2.800
(14) 3.085 2.967 2.748 2.922 2.938
.

  The electronic image pickup apparatus of the present invention as described above is an image pickup apparatus that forms an object image with a zoom lens and receives the image on an image pickup device such as a CCD or a silver salt film to take a picture, particularly a digital camera or video camera, The present invention can be used for personal computers and telephones, which are examples of information processing apparatuses, particularly mobile phones that are convenient to carry. The embodiment is illustrated below.

  51 to 53 are conceptual diagrams of a configuration in which the zoom lens according to the present invention is incorporated in the photographing optical system 41 of the digital camera. 51 is a front perspective view showing the appearance of the digital camera 40, FIG. 52 is a rear perspective view thereof, and FIG. 53 is a cross-sectional view showing the configuration of the digital camera 40. In this example, the digital camera 40 includes a photographing optical system 41 having a photographing optical path 42, a finder optical system 43 having a finder optical path 44, a shutter 45, a flash 46, a liquid crystal display monitor 47, and the like. When the shutter 45 disposed in the position is pressed, photographing is performed through the photographing optical system 41 including the zoom lens (abbreviated in the drawing) of the present invention, for example, the zoom lens of the first embodiment. An object image formed by the photographing optical system 41 is formed on the imaging surface of the CCD 49 through an optical low-pass filter provided with a near-infrared cut coat. The object image received by the CCD 49 is displayed as an electronic image on the liquid crystal display monitor 47 provided on the back of the camera via the processing means 51. Further, the processing means 51 is connected to a recording means 52 so that a photographed electronic image can be recorded. The recording means 52 may be provided separately from the processing means 51, or may be configured to perform recording / writing electronically using a floppy disk, memory card, MO, or the like. Further, it may be configured as a silver salt camera in which a silver salt film is arranged in place of the CCD 49.

Further, a finder objective optical system 53 is disposed on the finder optical path 44. The object image formed by the finder objective optical system 53 is formed on the field frame 57 of the Porro prism 55 which is an image erecting member. Behind this polyprism 55 is an eyepiece optical system 59 that guides the erect image to the observer eyeball E. Note that cover members 50 are disposed on the incident side of the photographing optical system 41 and the finder objective optical system 53 and on the exit side of the eyepiece optical system 59, respectively.

  The digital camera 40 configured in this manner is a zoom lens with a large back focus, a photographing optical system 41 having a wide angle of view and a high zoom ratio, good aberration, bright, and a filter that can be arranged with a high back focus. Performance and cost reduction can be realized.

  In the example of FIG. 53, a plane parallel plate is disposed as the cover member 50, but a lens having power may be used.

  In the example of FIG. 53, the example is a digital camera in which the photographing optical path 42 and the finder optical path 44 are provided in parallel. However, the finder optical path is between the imaging surface of the zoom lens of the photographing optical system 41. When a TTL is provided by providing a splitting prism, the finder objective optical system 53 and the polyprism 55 are omitted, and instead a pentaprism is arranged to guide the subject image to the observer eyeball E through the photographing optical system 41. .

  Next, a personal computer which is an example of an information processing apparatus in which the zoom lens of the present invention is incorporated as an objective optical system is shown in FIGS. 54 is a front perspective view with the cover of the personal computer 300 opened, FIG. 55 is a sectional view of the photographing optical system 303 of the personal computer 300, and FIG. 56 is a side view of the state of FIG. As shown in FIGS. 54 to 56, a personal computer 300 includes a keyboard 301 for a writer to input information from outside, information processing means and recording means not shown, and a monitor for displaying information to the operator. 302 and a photographing optical system 303 for photographing the operator himself and surrounding images. Here, the monitor 302 may be a transmissive liquid crystal display element that is illuminated from the back by a backlight (not shown), a reflective liquid crystal display element that reflects and displays light from the front, a CRT display, or the like. Further, in the drawing, the photographing optical system 303 is built in the upper right of the monitor 302. However, the imaging optical system 303 is not limited to the place, and may be anywhere around the monitor 302 or the keyboard 301.

  The photographic optical system 303 includes an objective lens 112 including a zoom lens (abbreviated in the drawing) according to the present invention and an image sensor chip 162 that receives an image on a photographic optical path 304. These are built in the personal computer 300.

  Here, an optical low-pass filter is additionally affixed on the image sensor chip 162 to be integrally formed as an image pickup unit 160, and can be fitted and attached to the rear end of the lens frame 113 of the objective lens 112 with one touch. Therefore, the centering of the objective lens 112 and the image sensor chip 162 and the adjustment of the surface interval are unnecessary, and the assembly is simplified. A cover glass 114 for protecting the objective lens 112 is disposed at the tip of the lens frame 113. The zoom lens driving mechanism in the lens frame 113 is not shown.

  The object image received by the image sensor chip 162 is input to the processing means of the personal computer 300 through the terminal 166 and displayed on the monitor 302 as an electronic image. FIG. A rendered image 305 is shown. The image 305 can also be displayed on the personal computer of the communication partner from a remote location via the processing means, the Internet, or the telephone.

Next, FIG. 57 shows a telephone, which is an example of an information processing apparatus in which the zoom lens of the present invention is incorporated as a photographing optical system, particularly a portable telephone that is convenient to carry. 57A is a front view of the mobile phone 400, FIG. 57B is a side view, and FIG. 57C is a cross-sectional view of the photographing optical system 405. As shown in FIGS. 57A to 57C, the mobile phone 400 includes a microphone unit 401 that inputs an operator's voice as information, a speaker unit 402 that outputs a voice of a call partner, and an operator who receives information. An input dial 403 for inputting information, a monitor 404 for displaying information such as a photographed image and a telephone number of the operator and the other party, a photographing optical system 405, an antenna 406 for transmitting and receiving communication radio waves, and an image And processing means (not shown) for processing information, communication information, input signals, and the like. Here, the monitor 404 is a liquid crystal display element. In the drawing, the arrangement positions of the respective components are not particularly limited to these. The photographing optical system 405 includes an objective lens 112 including a zoom lens (abbreviated in the drawing) according to the present invention disposed on a photographing optical path 407, and an image sensor chip 162 that receives an object image. These are built in the mobile phone 400.

  Here, an optical low-pass filter is additionally affixed on the image sensor chip 162 to be integrally formed as an image pickup unit 160, and can be fitted and attached to the rear end of the lens frame 113 of the objective lens 112 with one touch. Therefore, the centering of the objective lens 112 and the image sensor chip 162 and the adjustment of the surface interval are unnecessary, and the assembly is simplified. A cover glass 114 for protecting the objective lens 112 is disposed at the tip of the lens frame 113. The zoom lens driving mechanism in the lens frame 113 is not shown.

  The object image received by the imaging element chip 162 is input to the processing means (not shown) via the terminal 166 and displayed as an electronic image on the monitor 404, the monitor of the communication partner, or both. . Further, when transmitting an image to a communication partner, the processing means includes a signal processing function for converting information of an object image received by the image sensor chip 162 into a signal that can be transmitted.

  The above zoom lens of the present invention can be configured as follows, for example.

[1] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. The second group having a negative refractive power and the rear group having at least two movable subgroups, the focal length f ₁ of the first group and the anomalous dispersion of the medium of at least one positive lens of the first group A zoom lens characterized in that Δθ _gF satisfies the following conditions.

(1) 6 <f ₁ / L <20
(2) 0.015 <Δθ _gF <0.1
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface. In addition, the definition of the anomalous dispersion Δθ _gF of each medium (glass material) is
θ _gF = A _gF + B _gF · ν _d + Δθ _gF
However,
θ _gF = ( _ng −n _F ) / (n _F −n _C )
ν _d = (n _d −1) / (n _F −n _C )
n _d , n _F , n _C , and _ng are refractive indexes for d line, F line, C line, and g line, A _gF , and B _gF are glass cord 511605 (trade name NSL7 at OHARA INC.)
is a coefficient of a straight line determined by two glass type of _{θ gF = 0.5436 ν d = 60.49} ) and the glass cord 620363 (trade name _{PBM2 θ gF = 0.5828 ν d =} 36.26 at OHARA INC), A _gF is .641462485, B _gF is -0.001617.
829,
It is.

[2] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. A rear group having at least 11 lenses but a movement amount Δz ₁ from the wide-angle end to the telephoto end of the first group when focusing on an object point at infinity, and a second group when focusing on an object point at infinity A zoom lens characterized by satisfying the following condition with respect to the movement amount Δz ₂ from the wide-angle end to the telephoto end of

(3) 3 <(Δz ₂ −Δz ₁ ) / L <9
However, the movement toward the image side is positive. L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

[3] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. A rear group having at least 11 lenses but a movement amount Δz ₁ from the wide-angle end to the telephoto end of the first group when focusing on an object point at infinity, and a second group when focusing on an object point at infinity A zoom lens characterized by satisfying the following condition with respect to the movement amount Δz ₂ from the wide-angle end to the telephoto end of

(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive.

[4] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having negative refractive power and a rear group having at least two movable subgroups. The first group moves while drawing a convex reciprocating locus toward the image side, and is focused at an object point at infinity. A zoom lens characterized in that the amount of movement Δz _1WM from the wide-angle end of the first group to the intermediate focal length f _M (= √ (f _W · f _T )) is positive. However, the movement toward the image side is positive. Note that f _W is the total focal length when the infinite object point is in focus at the wide-angle end, and f _T is the total focal length when the infinite object point is in focus at the telephoto end.

[5] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having negative refractive power and a rear group having at least two movable subgroups. The first group moves while drawing a convex reciprocating locus toward the image side, and is focused at an object point at infinity. the first group moving amount Delta] z ₁ from the wide-angle end to the telephoto end, and wherein a satisfies the following with respect to the movement amount Delta] z ₂ to the telephoto end from the wide-angle end of the second group at the time of infinite object point focusing of the Zoom lens to be used.

(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive.

[6] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having negative refractive power and a rear group having at least two movable subgroups. The first group moves while drawing a convex reciprocating locus toward the image side, and is focused at an object point at infinity. the first group moving amount Delta] z ₁ from the wide-angle end to the telephoto end, and wherein a satisfies the following with respect to the movement amount Delta] z ₂ to the telephoto end from the wide-angle end of the second group at the time of infinite object point focusing of the Zoom lens to be used.

(3) 3 <(Δz ₂ −Δz ₁ ) / L <9
(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive. L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

[7] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. A rear group having at least 11 lenses but no more than 11 lenses, and a ratio Δβ ₂ (= β _2T / β) of the magnification at the wide angle end β _2W and the magnification at the telephoto end β _2T of the second group when focusing on an object point at infinity _2W ) and a zoom lens satisfying the following conditions regarding the zoom ratio γ from the wide-angle end to the telephoto end of the entire system.

(5) 0.3 <log (Δβ ₂ ) / log (γ) <0.8
(6) 5 <γ <15
[8] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. A zoom lens comprising a rear group having at least 11 and no more than 11 lenses, and satisfying the following conditions with respect to the composite magnification β _rW of the rear group at the time of focusing on an infinite object point at the wide angle end.

(7) −0.6 <β _rW <−0.1
[9] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. Each of the movable sub-groups in the rear group has at least one cemented lens component, and the rear group at the time of focusing on an infinite object point at the wide angle end. A zoom lens characterized by satisfying the following condition with respect to the composite magnification β _rW .

(7) −0.6 <β _rW <−0.1
[10] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. A rear group having no less than 11 lenses, and any subgroup on the image side of a positive subgroup closest to the object among the subgroups having a negative magnification in the rear group Focusing on the wide-angle end infinite object point in the positive subgroup closest to the image side, β _RRW Zoom lens to be used.

(8) −0.4 <β _RRW <0.9
[11] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and a configuration including a positive lens on the image side, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. A rear group having no less than 11 lenses, and among the subgroups of the rear group, from the wide-angle end to the telephoto end during focusing on an object point at infinity of the subgroup on the most object side having positive refractive power movement amount Delta] z _RF up relates the movement amount Delta] z _RR from the wide-angle end at the time of infinite object point focusing of the positive sub group of the most image side to the telephoto end, the following conditions Zoom lens and satisfies the.

(9) −0.4 <Δz _RR / Δz _RF <0.8
(10) 0.3 <| Δz _RF | / L <4.0
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

    [12] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or 2 lenses including the negative lens, the two closest to the image side are positive lenses, and any one of the surfaces in the group is an aspherical surface, and at least two movable subgroups. A rear group having at least 11 lenses but no more than 11 lenses, the rear group having a positive refractive power and negative magnification and a most image-side positive subgroup, The relative positions of each change at the time of zooming, and the two positive subgroups are a cemented lens component, an aspheric surface, and a glass material with ν> 80 (ν: Abbe number) or more. Zoom lens characterized by a lens using comprising one at least, respectively.

    [13] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or Including a negative lens, the most image-side two lenses having a positive lens configuration, and a second group in which any surface in the group is an aspherical surface, and at least two positive movable subgroups. And a rear group having 7 or more and 11 or less lenses, and a sub-group closest to the object side of the rear group has a negative refractive power.

    [14] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or Including a negative lens, the most image-side two lenses having a positive lens configuration, and a second group in which any surface in the group is an aspherical surface, and at least two positive movable subgroups. A zoom lens comprising: a rear group having 7 to 11 lenses, wherein the most object side sub-group of the rear group is composed of one negative lens component.

    [15] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Having negative refractive power and including at least three negative lenses, the most image side being a positive lens configuration, or the most object side three being a negative lens and the image side including a positive lens, or Including a negative lens, the most image-side two lenses having a positive lens configuration, and a second group in which any surface in the group is an aspherical surface, and at least two positive movable subgroups. A zoom lens comprising: a rear group having 7 to 11 lenses, wherein the sub-group closest to the object side of the rear group is always fixed in the vicinity of the aperture stop and is composed of one negative lens component. .

[16] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A zoom lens comprising a second group having negative refractive power and a rear group having a variable interval at the time of zooming, and the focal length f ₁ of the first group satisfies the following condition: lens.

(1) 6 <f ₁ / L <20
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

[17] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A second group having a negative refractive power and a rear group having a variable interval at the time of zooming, and a medium of a focal length f ₁ of the first group and at least one positive lens of the first group A zoom lens characterized in that the anomalous dispersion Δθ _gF of the lens satisfies the following condition.

(1) 6 <f ₁ / L <20
(2) 0.015 <Δθ _gF <0.1
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface. In addition, the definition of the anomalous dispersion Δθ _gF of each medium (glass material) is
θ _gF = A _gF + B _gF · ν _d + Δθ _gF
However,
θ _gF = ( _ng −n _F ) / (n _F −n _C )
ν _d = (n _d −1) / (n _F −n _C )
n _d , n _F , n _C , and _ng are refractive indexes for d line, F line, C line, and g line, A _gF , and B _gF are glass cord 511605 (trade name NSL7 at OHARA INC.)
is a coefficient of a straight line determined by two glass type of _{θ gF = 0.5436 ν d = 60.49} ) and the glass cord 620363 (trade name _{PBM2 θ gF = 0.5828 ν d =} 36.26 at OHARA INC), A _gF is .641462485, B _gF is -0.001617.
829,
It is.

[18] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A second group having negative refractive power and a rear group having a variable interval at the time of at least two zooms, and moving from the wide-angle end to the telephoto end of the first group when focusing on an object point at infinity the amount Delta] z _1, zoom from the second group at the wide angle end of the focal point at infinity, wherein the following condition is satisfied with respect to the movement amount Delta] z ₂ to the telephoto end lens.

(3) 3 <(Δz ₂ −Δz ₁ ) / L <9
However, the movement toward the image side is positive. L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

[19] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A second group having negative refractive power and a rear group having a variable interval at the time of at least two zooms, and moving from the wide-angle end to the telephoto end of the first group when focusing on an object point at infinity the amount Delta] z _1, zoom from the second group at the wide angle end of the focal point at infinity, wherein the following condition is satisfied with respect to the movement amount Delta] z ₂ to the telephoto end lens.

(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive.

[20] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having negative refractive power and a rear group having a variable interval at the time of zooming, and the first group moves while drawing a convex reciprocating locus on the image side, and is an object at infinity. A zoom lens characterized in that the amount of movement Δz _1WM from the wide-angle end of the first lens group to the intermediate focal length f _M (= √ (f _W · f _T )) during point _focusing is positive. However, the movement toward the image side is positive. Note that f _W is the total focal length when the infinite object point is in focus at the wide-angle end, and f _T is the total focal length when the infinite object point is in focus at the telephoto end.

[21] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having negative refractive power and a rear group having a variable interval at the time of zooming, and the first group moves while drawing a convex reciprocating locus on the image side, and is an object at infinity. The following condition is satisfied with respect to the movement amount Δz ₁ from the wide-angle end to the telephoto end of the first group at the point focusing, and the movement amount Δz ₂ from the wide-angle end to the telephoto end of the second group at the infinite object point focusing. A zoom lens characterized by that.

(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive.

[22] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having a negative refractive power and a rear group having a variable interval at the time of zooming, and the first group moves while drawing a convex reciprocating locus on the image side, and is at infinity. The following condition is satisfied with respect to the movement amount Δz ₁ from the wide-angle end to the telephoto end of the first group at the point focusing, and the movement amount Δz ₂ from the wide-angle end to the telephoto end of the second group at the infinite object point focusing. A zoom lens characterized by that.

(3) 3 <(Δz ₂ −Δz ₁ ) / L <9
(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive. L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

[23] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. Consists of a second group having negative refractive power and a rear group having a variable interval at the time of zooming, and the second group includes at least three negative lenses, and the most image side is a positive lens. Or three lenses closest to the object side are negative lenses and a positive lens is included on the image side, or two lenses closest to the image side including a negative lens are positive lens configurations. Any surface in the second lens group is aspheric, and the ratio Δβ ₂ (= β _2T / β _2W) of the second lens group wide-angle end magnification β _2W and telephoto end magnification β _2T when focusing on an object point at infinity ) And the zoom ratio γ from the wide-angle end to the telephoto end of the entire system, the following condition is satisfied:

(5) 0.3 <log (Δβ ₂ ) / log (γ) <0.8
(6) 5 <γ <15
[24] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having a negative refractive power and a rear group having a variable interval at the time of _{zooming, and the} following conditions regarding the composite magnification β _rW of the rear group when focusing on an infinite object point at the wide angle end A zoom lens characterized by satisfying

(7) −0.6 <β _rW <−0.1
[25] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. The second group having a negative refractive power and the subsequent rear group having a variable interval at the time of zooming, and each of the movable subgroups in the rear group has at least one cemented lens component. And a zoom lens characterized by satisfying the following condition with respect to the composite magnification β _rW of the rear group at the time of focusing on an infinite object point at the wide angle end.

(7) −0.6 <β _rW <−0.1
[26] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A second group having a negative refractive power and a rear group having a variable interval at the time of at least two magnifications, and being the closest to the object side among subgroups having a negative magnification in the rear group. Focus on any subgroup on the image side of a certain positive subgroup, and satisfy the following condition with respect to the magnification β _RRW at the wide-angle end infinite object point of the most positive subgroup on the image side. A featured zoom lens.

(8) −0.4 <β _RRW <0.9
[27] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. The second group having negative refractive power and the rear group having a plurality of subgroups, and among the subgroups of the rear group, the infinite object point of the subgroup on the most object side having the positive refractive power Regarding the amount of movement Δz _RF from the wide-angle end to the telephoto end at the time of focusing, and the amount of movement Δz _RR from the wide-angle end to the telephoto end at the time of focusing on an object point at infinity of the positive subgroup on the most image side, the following conditions are satisfied. A zoom lens comprising: a sub-group satisfying and having a sub-group whose relative position changes between the two positive sub-groups upon zooming.

(9) −0.4 <Δz _RR / Δz _RF <0.8
(10) 0.3 <| Δz _RF | / L <4.0
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

    [28] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. The second group has a negative refractive power and a rear group having a plurality of subgroups. The rear group includes a subgroup having a positive refractive power and a negative magnification and a positive group closest to the image side. And a negative subgroup between the two positive subgroups, and their relative positions change during zooming, and the two positive subgroups include a cemented lens component and an aspherical surface. A zoom lens comprising at least one lens using a glass material with ν> 80 (ν: Abbe number) or more.

[29] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A second group having a negative refractive power and a rear group having a plurality of subgroups, and the subgroup on the most object side having a positive refractive power and a negative magnification among the subgroups of the rear group. The amount of movement Δz _RF from the wide-angle end to the telephoto end when focusing on an object point at infinity, and the amount of movement Δz _RR from the wide-angle end to the telephoto end when focusing on an object point at infinity of the positive subgroup on the most image side The negative subgroup satisfying the following condition and having a negative subgroup whose relative position changes between the two positive subgroups upon zooming, and at the time of focusing on an object point at infinity A zoom lens characterized by satisfying the following condition with respect to the movement amount Δz _RN from the wide-angle end to the telephoto end:

(9) −0.4 <Δz _RR / Δz _RF <0.8
(10) 0.3 <| Δz _RF | / L <4.0
(11) -2 <Δz _RN / L <1
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

    [30] Moving from the object side to the image side along the optical axis when zooming from the wide-angle end to the telephoto end, and the first lens group having a positive refractive power movable along the optical axis at the time of zooming A second group having a negative refractive power and a rear group having a variable interval at the time of at least three magnifications, and a subgroup on the most object side of the rear group has a negative refractive power. Zoom lens to be used.

    [31] In order from the object side, the first lens group having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A second group having a negative refractive power and a rear group having a variable interval at the time of at least three zooms, and a sub group closest to the object side of the rear group is composed of one negative lens component. Zoom lens.

    [32] In order from the object side, the first lens unit having a positive refractive power movable along the optical axis at the time of zooming, and moving toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. It consists of a second group having negative refractive power and a rear group having a variable interval at the time of at least three subsequent magnifications. The most object side subgroup of the rear group is always fixed in the vicinity of the aperture stop. A zoom lens comprising two negative lens components.

    [33] Any one of [1] to [12] or [16] to [29] above, wherein the sub-group of positive refractive power closest to the object side in the rear group has a negative magnification. The described zoom lens.

    [34] The zoom lens according to any one of [1] to [32], wherein the zooming range includes a shootable field angle 2ω = 70 °.

[35] The zoom lens according to any one of [1] to [32], wherein the following condition is satisfied with respect to the back focus (air conversion length) F _BW when focusing on an infinite object point at the wide angle end.

(12) 2.0 <F _BW / f _W <5.0
However, f _W is the total focal length of the entire system when focusing on an infinite object point at the wide angle end.

[36] The zoom lens as described in any one of [1] to [32] above, wherein the following condition is satisfied with respect to the minimum F value F _W when focusing on an infinite object point at the wide angle end.

(13) 1.4 <F _W <3.5
[37] The zoom lens according to any one of [1] to [32], wherein the following condition is satisfied with respect to the entrance pupil position ENP at the wide-angle end.

(14) 2 <ENP / L <5
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

[38] The pixel interval a is
1.0 × 10 ⁻⁴ × L <a <6.0 × 10 ⁻⁴ × L (mm)
The zoom lens according to any one of [1] to [32], wherein the zoom lens is used as an imaging optical system of a photographing apparatus (camera, video movie, or the like) having an image pickup device. However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface.

    [39] A zoom lens that simultaneously satisfies any two or more of the above [1] to [38].

    [40] An image pickup apparatus characterized in that an image pickup device is disposed in the vicinity of the image forming surface of the zoom lens according to any one of [1] to [39].

    [41] The image pickup apparatus according to [40], wherein the image pickup device is an electronic image pickup device, and a low-pass filter is disposed between the zoom lens and the electronic image pickup device.

    [42] The imaging apparatus according to [40] or [41], wherein an optical element that divides an optical path for observation is disposed between the zoom lens and the electronic imaging element.

  As is apparent from the above description, according to the present invention, the TTL optical system is used for a camera having a small effective image pickup surface size such as a digital camera and having a diagonal field angle of 70 ° or more at the wide angle end of about 7 to 10 times. A bright wide-angle high-magnification zoom lens compatible with the finder and having an F value of about 2.0 to 2.8 at the wide-angle end can be realized.

G1 ... 1st group G2 ... 2nd group G3 ... 3rd group G4 ... 4th group G5 ... 5th group G6 ... 6th group P ... Optical path dividing prism (parallel plate) for viewfinder, near infrared cut coat is provided. Parallel plate group I ... image plane E ... observer eyeball 40 ... digital camera 41 ... shooting optical system 42 ... shooting optical path 43 ... finder optical system 44 ... Optical path 45 for viewfinder ... Shutter 46 ... Flash 47 ... Liquid crystal display monitor 49 ... CCD
DESCRIPTION OF SYMBOLS 50 ... Cover member 51 ... Processing means 52 ... Recording means 53 ... Finder objective optical system 55 ... Porro prism 57 ... Field frame 59 ... Eyepiece optical system 112 ... Objective lens 113 ... Lens frame 114 ... Cover glass 160 ... Imaging unit 162 ... Image sensor chip 166 ... Terminal 300 ... Personal computer 301 ... Keyboard 302 ... Monitor 303 ... Shooting optical system 304 ... Shooting optical path 305 ... Image 400 ... Mobile phone 401 ... Microphone unit 402 ... Speaker unit 403 ... Input dial 404 ... Monitor 405 ... Shooting optics System 406 ... Antenna 407 ... Imaging optical path

Claims (11)

In order from the object side, a first lens unit having a positive refractive power that is movable along the optical axis at the time of zooming, and negative refraction that moves toward the image side along the optical axis when zooming from the wide-angle end to the telephoto end. A second group having a force and a rear group having a variable interval at the time of zooming, and the first group moves while drawing a convex reciprocating locus toward the image side, and focuses on an object point at infinity. The movement amount Δz ₁ from the wide-angle end to the telephoto end of the first group at the time and the movement amount Δz ₂ from the wide-angle end to the telephoto end of the second group at the time of focusing on an infinite object point satisfy the following conditions: Zoom lens.
(3) 3 <(Δz ₂ −Δz ₁ ) / L <9
(4) −1.0 <Δz ₁ / Δz ₂ <0.5 (Δz ₂ > 0)
However, the image side movement is positive. L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface. 2. The zoom lens according to claim 1, wherein a sub-group of positive refractive power closest to the object side in the rear group has a negative magnification. The zoom lens according to claim 1, wherein the zoomable range includes a shootable field angle of 2ω = 70 °. 2. The zoom lens according to claim 1, wherein the following condition is satisfied with respect to the back focus (air conversion length) F _BW at the time of focusing on an infinite object point at the wide angle end.
(12) 2.0 <F _BW / f _W <5.0
However, f _W is the total focal length of the entire system when focusing on an infinite object point at the wide angle end. The zoom lens according to claim 1, wherein the following condition is satisfied with respect to the minimum F value F _W when focusing on an infinite object point at the wide angle end.
(13) 1.4 <F _W <3.5 2. The zoom lens according to claim 1, wherein the following condition is satisfied with respect to the entrance pupil position ENP at the wide angle end.
(14) 2 <ENP / L <5
However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface. The pixel interval a is
1.0 × 10 ⁻⁴ × L <a <6.0 × 10 ⁻⁴ × L (mm)
The zoom lens according to claim 1, wherein the zoom lens is used as an imaging optical system of an imaging apparatus having an imaging element. However, L is the diagonal length of the effective imaging surface disposed in the vicinity of the imaging surface. A zoom lens that satisfies at least two of claims 1 to 7 at the same time. An image pickup apparatus comprising an image pickup device in the vicinity of an image plane of the zoom lens according to claim 1. The imaging apparatus according to claim 9, wherein the imaging element is an electronic imaging element, and a low-pass filter is disposed between the zoom lens and the electronic imaging element. The image pickup apparatus according to claim 9, wherein an optical element that divides an optical path for observation is disposed between the zoom lens and the electronic image pickup element.

Images