Zoom lens and imaging apparatus

Abstract

To provide, for example, a zoom lens advantageous in terms of a wide angle of view, high zoom ratio, small size, and high optical performance over the entire zoom range.SOLUTION: A zoom lens has, in order from an object side to an image side, a first lens group having a positive refractive power that does not move for zooming, one or more lens groups having a negative refractive power that move to the image side in zooming from a wide angle end to a telephoto end, and two or more lens groups having a positive refractive power that move to the object side in zooming from the wide angle end to the telephoto end. In zooming from the wide angle end to the telephoto end, a lens group having the largest amount of movement, of the one or more lens groups having a negative refractive power, is defined as the N-th lens group, and a lens group having the largest amount of movement, of the two or more lens groups having a positive refractive power, as the P-th lens group. The focal length of the first lens group, the focal lengths at the wide angle end and the telephoto end, the difference in the distance from the N-th lens group to an image surface on an optical axis between the wide angle end and the telephoto end, and the difference in the distance from the P-th lens group to the image surface on the optical axis between the wide angle end and the telephoto end, are appropriately set.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a zoom lens and an imaging apparatus. [Background technology]

[0002] A wide angle of view, a high zoom ratio, and a small zoom lens with high optical performance are required for imaging devices such as television cameras, movie cameras, and photo cameras. In addition, a zoom lens is required to have high resolution over the entire imaging area of ​​a high-resolution imaging device in a professional camera.

[0003] The zoom lenses of Patent Documents 1 and 2 are composed of, in order from the object side to the image side, a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power, and a fifth lens group with positive refractive power. In this zoom lens, the second to fourth lens groups move during zooming. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-47380 [Patent Document 2] JP 2014-81464 A Summary of the Invention [Problem to be solved by the invention]

[0005] In order to obtain a zoom ratio exceeding 130 in the zoom lens described above, it becomes difficult to correct chromatic aberration at the telephoto end.

[0006] An object of the present invention is to provide a zoom lens that is advantageous in terms of, for example, a wide angle of view, a high zoom ratio, a small size, and high optical performance over the entire zoom range. [Means for solving the problem]

[0007] In order to achieve the above object, a zoom lens of the present invention has, in order from the object side to the image side, a first lens group with positive refractive power that does not move for zooming, at least one lens group with negative refractive power that moves toward the image side when zooming from the wide-angle end to the telephoto end, and at least two lens groups with positive refractive power that move toward the object side when zooming from the wide-angle end to the telephoto end, wherein a lens group that moves the greatest amount among the at least one lens group with negative refractive power when zooming from the wide-angle end to the telephoto end is designated as an Nth lens group, The lens group having the greatest amount of movement among the at least two lens groups having positive refractive power is the P-th lens group, the focal length of the first lens group is f1, the focal length of the zoom lens at the wide-angle end is fw, the focal length of the zoom lens at the telephoto end is ft, the difference between the optical axial distance from the N-th lens group to the image plane at the wide-angle end and the optical axial distance from the N-th lens group to the image plane at the telephoto end is mn, and the difference between the optical axial distance from the P-th lens group to the image plane at the wide-angle end and the optical axial distance from the P-th lens group to the image plane at the telephoto end is mp, 4.35 <ft / f1<6.00 1.0<|mn / mp|<2.0 0.02 <fw / f1≦0.035 The present invention is characterized in that: Effect of the Invention

[0008] According to the present invention, it is possible to provide a zoom lens that is advantageous in terms of, for example, a wide angle of view, a high zoom ratio, a small size, and high optical performance over the entire zoom range. [Brief description of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view of a lens when focusing on infinity at the wide-angle end in Numerical Example 1. [Diagram 2] Aberration diagrams of Numerical Example 1 at the wide-angle end (a), f=220.03 mm (b), and telephoto end (c) when focusing on infinity [Diagram 3] 1 is a cross-sectional view of a lens when focusing on infinity at the wide-angle end in Numerical Example 2. [Figure 4]Aberration diagrams of Numerical Example 2 when focusing on infinity at the wide-angle end (a), f=208.08 mm (b), and telephoto end (c). [Diagram 5] 13 is a cross-sectional view of a lens when focusing on infinity at the wide-angle end in Numerical Example 3. [Figure 6] Aberration diagrams of Numerical Example 3 at the wide-angle end (a), f=260.97 mm (b), and telephoto end (c) when focusing on infinity [Figure 7] 13 is a cross-sectional view of a lens when focusing on infinity at the wide-angle end in Numerical Example 4. [Figure 8] Aberration diagrams of Numerical Example 4 when focusing on infinity at the wide-angle end (a), f=210.60 mm (b), and telephoto end (c). [Figure 9] 13 is a cross-sectional view of a lens when focusing on infinity at the wide-angle end in Numerical Example 5. [Figure 10] Aberration diagrams of Numerical Example 5 at the wide-angle end (a), f=221.43 mm (b), and telephoto end (c) when focusing on infinity [Figure 11] 13 is a cross-sectional view of a lens when focusing on infinity at the wide-angle end in Numerical Example 6. [Figure 12] Aberration diagrams of Numerical Example 6 when focusing on infinity at the wide-angle end (a), f=251.82 mm (b), and telephoto end (c). [Figure 13] 13 is a cross-sectional view of a lens in a state where the lens is focused on infinity at the wide-angle end in Numerical Example 7. [Figure 14] Aberration diagrams of Numerical Example 7 when focusing on infinity at the wide-angle end (a), 219.95 mm (b), and telephoto end (c). [Figure 15] 1 is a schematic diagram of a main part of an imaging device according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the features of the zoom lens of the present invention will be described in accordance with each conditional expression. In order to achieve a wide angle of view, a high zoom ratio, a small size and light weight, and high optical performance over the entire zoom range, the refractive power of the first lens group and the movement amount of the lens groups that move during zooming are specified for the zoom lens of the present invention.

[0011] The zoom lens of the present invention has, in order from the object side to the image side, a first lens group with positive refractive power that does not move for zooming, at least one lens group with negative refractive power that moves to the image side when zooming from the wide-angle end to the telephoto end, and at least two lens groups with positive refractive power that move to the object side when zooming from the wide-angle end to the telephoto end. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close range side. Among at least one lens group having negative refractive power that moves toward the image side during zooming from the wide-angle end to the telephoto end, the lens group that moves the greatest amount is defined as the Nth lens group, and among at least two lens groups having positive refractive power that move toward the object side, the lens group that moves the greatest amount is defined as the Pth lens group, and the focal length of the first lens group is f1, the focal length at the wide-angle end is fw, the focal length at the telephoto end is ft, and the differences in positions of the Nth lens group and the Pth lens group from the image plane on the optical axis at the wide-angle end and the telephoto end are mn and mp, respectively. 4.35 <ft / f1<6.00 ···(1) 1.0<|mn / mp|<2.0 (2) 0.02 <fw / f1<0.05 ···(3) With this configuration, the zoom lens of the present invention has an angle of view at the wide-angle end of about 60 to 70 degrees, an angle of view at the telephoto end of about 0.4 to 0.7 degrees, a zoom ratio of about 130 to 160, and is small, lightweight, and capable of achieving high optical performance.

[0012] Formula (1) specifies the ratio of the focal length at the telephoto end to the focal length of the first lens group. Formula (2) specifies the ratio of the amount of movement of the lens group with negative refractive power moving toward the image side and the lens group with positive refractive power moving toward the object side when zooming from the wide-angle end to the telephoto end. Formulas (1) and (2) are specified to achieve a high zoom ratio while simultaneously achieving a compact zoom lens and correcting axial chromatic aberration. If the upper limit condition of formula (1) is not satisfied, it is advantageous for the compactness of the zoom lens, but the magnification rate of the aberration generated in the first lens group increases, making it difficult to satisfactorily correct the optical performance at the telephoto end, particularly the axial chromatic aberration. Conversely, if the lower limit condition of formula (1) is not satisfied, the refractive power of the first lens group becomes weak, making it difficult to achieve both a high zoom ratio and a compact zoom lens.

[0013] If the upper limit condition of equation (2) is not met, the amount of movement of the Nth lens group, which has negative refractive power, becomes large, so that the lateral magnification of the Nth lens group at the telephoto end becomes large, and the longitudinal chromatic aberration generated by the Nth lens group becomes large. This makes it difficult to satisfactorily correct the optical performance at the telephoto end, particularly the longitudinal chromatic aberration. Conversely, if the lower limit condition of equation (2) is not met, the amount of movement of the Nth lens group, which is the main zoom group, becomes small, so that the sum of the amounts of movement of the Nth lens group and the Pth lens group becomes large, making it difficult to miniaturize the zoom lens.

[0014] Formula (3) specifies the ratio of the focal length at the wide-angle end to the focal length of the first lens group. The upper and lower limit conditions of formula (3) are specified in order to reduce the size of the zoom lens and to provide good correction for peripheral performance at the wide-angle end. If the upper limit condition of formula (3) is not satisfied, the refractive power of the first lens group will be too strong, making it difficult to correct curvature of field and distortion at the wide-angle end. Conversely, if the lower limit condition of formula (3) is not satisfied, the refractive power of the first lens group will be too weak, making it difficult to achieve both a high zoom ratio and a compact zoom lens. More preferably, the formulas (1), (2), and (3) are set as follows: 4.35 <ft / f1<5.80 ···(1a) 1.40<|mn / mp|<1.98 (2a) 0.025 <fw / f1<0.040 ···(3a)

[0015] In a further aspect of the zoom lens of the present invention, when a lens group that moves toward the image side during zooming from the wide-angle end to the telephoto end is the Vth lens group, and the composite lateral magnifications of the Vth lens group at the wide-angle end and the telephoto end are βvw and βvt, respectively,

[0016] 2.0<(βvt / βvw) 2 ×(fw / ft)<5.0 (4) The conditional expressions are satisfied. Expression (4) specifies the ratio of the composite lateral magnification (zooming contribution) of the Vth lens group at the wide-angle end and the telephoto end to the zooming contribution of the other lens groups, and by satisfying the range of expression (4), a high zoom ratio is achieved while the zoom lens is compact and the axial chromatic aberration is corrected. If the upper limit condition of expression (4) is not satisfied, the composite lateral magnification of the Vth lens group at the telephoto end becomes large, and the axial chromatic aberration generated in the Vth lens group becomes large. This makes it difficult to satisfactorily correct the optical performance at the telephoto end, particularly the axial chromatic aberration. Conversely, if the lower limit condition of expression (4) is not satisfied, the zooming contribution of the Vth lens group becomes small, and the amount of movement of the lens groups other than the Vth lens group becomes large, making it difficult to achieve both a high zoom ratio and a compact zoom lens. More preferably, expression (4) is set as follows. 2.5<(βvt / βvw) 2 ×(fw / ft)<4.2 (4a)

[0017] In a further aspect of the zoom lens of the present invention, the lens group that moves toward the object side during zooming from the wide-angle end to the telephoto end is the C lens group, and the V lens group passes through a point (state) where the composite lateral magnification is -1x during zooming from the wide-angle end to the telephoto end. When the composite lateral magnification of the C lens group at a zoom position fz where the composite lateral magnification of the V lens group is -1x is βcfz, -1.00<βcfz<-0.65 (5) The conditional expressions below are satisfied. Expression (5) is stipulated in order to reduce the size of the Cth lens group and to satisfactorily correct the optical performance at the intermediate zoom position and the telephoto end. If the upper limit condition of expression (5) is not satisfied, the Cth lens group will be located on the object side at the zoom position fz, so that the lens diameter of the Cth lens group will be large, making it difficult to reduce the size of the zoom lens. Conversely, if the lower limit condition of expression (5) is not satisfied, the amount of movement of the Cth lens group from the zoom position fz to the telephoto end will be large, making it difficult to satisfactorily correct the variation in spherical aberration from the intermediate zoom position to the telephoto end. More preferably, expression (5) is set as follows: -0.9<βcfz<-0.7 (5a)

[0018] In a further aspect of the zoom lens of the present invention, when the lens group that moves toward the object side during zooming from the wide-angle end to the telephoto end is the C lens group, the V lens group passes through a point where the composite lateral magnification is -1x during zooming from the wide-angle end to the telephoto end, and at zoom position fz where the composite lateral magnification of the V lens group is -1x, the composite lateral magnification of the C lens group simultaneously becomes -1x.

[0019] In a further embodiment of the zoom lens of the present invention, the Cth lens group is composed of, in order from the object side to the image side, a P1 lens group having a positive refractive power and a P2 lens group having a positive refractive power. When the distances between adjacent optical surfaces on the optical axis of the P1 lens group and the P2 lens group at the wide-angle end and the telephoto end are dw and dt, respectively, 0.1 <dt / dw<2.0 ···(6) The conditional expressions below are satisfied. Here, the distances dw and dt between the P1 lens group and the P2 lens group at the wide-angle end and the telephoto end are the distances on the optical axis between the surface of the P1 lens group closest to the image side and the surface of the P2 lens group closest to the object side at the wide-angle end and the telephoto end, respectively. The expression (6) is stipulated in order to achieve a high zoom ratio while simultaneously making the zoom lens compact and correcting axial chromatic aberration. If the upper limit condition of the expression (6) is not satisfied, the distance between the P1 lens group and the P2 lens group at the telephoto end will be widened, and the zoom load of the V lens group will be increased. Therefore, the total amount of movement of the V lens group and the C lens group will be small, but the lateral magnification of the N lens group at the telephoto end will be large, and the axial chromatic aberration generated by the N lens group will be large. Conversely, if the lower limit condition of expression (6) is not satisfied, the distance between the P1 lens group and the P2 lens group at the wide-angle end becomes large, making it difficult to satisfactorily correct the fluctuation of axial chromatic aberration from the wide-angle end to the intermediate zoom position. 0.1 <dt / dw<1.5 ···(6a)

[0020] In a further aspect of the zoom lens of the present invention, when a lens group that moves toward the image side during zooming from the wide-angle end to the telephoto end is the Vth lens group, and a composite focal length of the Vth lens group at the wide-angle end is fvw, -15.0 <f1 / fvw<-8.0 ···(7) The following conditional expressions are satisfied. Expression (7) is stipulated in order to achieve both compactness of the zoom lens and aberration correction throughout the entire zoom range. If the upper limit condition of expression (7) is not satisfied, the refractive power of the Vth lens group will be weak, making it difficult to compact the zoom lens. Conversely, if the lower limit condition of expression (7) is not satisfied, the refractive power of the Vth lens group will be strong, making it difficult to satisfactorily correct aberrations, particularly from the middle to the telephoto end of zooming. It is more preferable to set expression (7) as follows: -13.0 <f1 / fvw<-9.5 ···(7a)

[0021] In a further aspect of the zoom lens of the present invention, when the lens group that moves toward the image side during zooming from the wide-angle end to the telephoto end is the V lens group, and the lens group that moves toward the object side is the C lens group, and when the composite focal lengths of the V lens group and the C lens group at the wide-angle end are fvw and fcw, respectively, -0.50 <fvw / fcw<-0.15 ···(8) The conditional expressions below are satisfied. Expression (8) is stipulated in order to achieve both compactness of the zoom lens and aberration correction throughout the entire zoom range. If the upper limit condition of expression (8) is not satisfied, the refractive power of the Cth lens group will be weak, so that the amount of movement of the Cth lens group will be large, making it difficult to compact the zoom lens. Conversely, if the lower limit condition of expression (8) is not satisfied, the refractive power of the Cth lens group will be strong, making it difficult to satisfactorily correct aberrations in the middle of zooming. It is more preferable to set expression (8) as follows: -0.4 <fvw / fcw<-0.2 ···(8a)

[0022] In another embodiment of the zoom lens of the present invention, the lens closest to the object side in the first lens group is a biconcave lens. By arranging a biconcave lens closest to the object side in the first lens group, it is possible to push the image side principal point of the first lens group toward the image side. This makes it possible to suppress an increase in the lens diameter of the eleventh lens group that accompanies a wider angle of view, which is advantageous for making the zoom lens more compact.

[0023] In a further aspect of the zoom lens of the present invention, when the focal length of the lens in the first lens group closest to the object side is f1n and the d-line reference Abbe number is ν1n, -1.65 <f1n / f1<-1.10 ···(9) 37<ν1n<48 (10) The following conditional expressions are satisfied. Expression (9) specifies the ratio of the focal length of the 1n lens, which is the lens in the 1st lens group closest to the object, to the 1st lens group. Expression (10) specifies the Abbe number of the 1n lens, which is the lens in the 11th lens group closest to the object. The conditions of expressions (9) and (10) are specified in order to achieve a wide angle of view, a high zoom ratio, and a compact size of the zoom lens while satisfactorily correcting chromatic aberration at the telephoto end. If the upper limit of expression (9) is not satisfied, the refractive power of the 1n lens will be strong relative to the 1st lens group, and the high-order aberration of the spherical aberration at the telephoto end will increase, making it difficult to achieve good optical performance. Conversely, if the lower limit of expression (9) is not satisfied, the refractive power of the 1n lens will be weak relative to the 1st lens group, making it difficult to compact the zoom lens. Furthermore, if the refractive power of the 1n lens is weak, the correction effect of the chromatic aberration occurring in the positive lens constituting the first lens group is weak, and the correction of the chromatic aberration at the telephoto end is insufficient. If the upper limit of the formula (10) is not satisfied, the difference in the Abbe number between the positive lens and the negative lens constituting the first lens group is small, and the refractive power of each lens constituting the first lens group is strong. As a result, the high-order aberration of the spherical aberration at the telephoto end increases, and it becomes difficult to achieve good optical performance. Conversely, if the condition of the lower limit of the formula (10) is not satisfied, the difference in the Abbe number between the positive lens and the negative lens constituting the first lens group is large, and the refractive power of the 1n lens is weak. Therefore, the correction effect of the chromatic aberration occurring in the positive lens constituting the first lens group is weak, and the correction of the chromatic aberration at the telephoto end is insufficient. More preferably, the formula (9) is set as follows. -1.63 <f1n / f1<-1.15 ···(9a)

[0024] In a further aspect of the zoom lens of the present invention, when the average Abbe number based on the d-line of the positive lenses constituting the first lens group is denoted by νpave, 80<νpave<100 (11) The conditional expressions (11) are stipulated in order to achieve correction of axial chromatic aberration at the telephoto end and high optical performance. If the upper limit of the expression (11) is not satisfied, it is difficult to manufacture a low-dispersion glass material. Conversely, if the lower limit of the expression (11) is not satisfied, the difference in Abbe number between the positive lens and the negative lens constituting the first lens group becomes small, and the refractive power of each lens constituting the first lens group becomes strong. As a result, the higher-order aberration of the spherical aberration at the telephoto end increases, making it difficult to achieve good optical performance. More preferably, the expression (11) is set as follows: 87<νpave<97...(11a)

[0025] In a further aspect of the zoom lens of the present invention, when the focal length at the wide-angle end is fw and the focal length at the telephoto end is ft, 125 <ft / fw<200 ···(12) The following conditional expressions are satisfied.

[0026] Furthermore, the image pickup apparatus of the present invention is characterized by having the zoom lens of each embodiment and a solid-state image pickup device having a predetermined effective image pickup range for receiving an image formed by the zoom lens.

[0027] It is also possible to protect the frontmost optical surface of the zoom lens of the present invention by attaching a protective filter and a lens equivalent to the protective filter adjacent to the object side of the zoom lens of the present invention, i.e., the object side of the first lens group. By arranging a biconcave lens closest to the object side of the first lens group, the image side principal point of the first lens group is pushed toward the image side, and the increase in the lens diameter of the 11th lens group due to the widening of the angle of view is suppressed, thereby making the zoom lens more compact. Therefore, when the focal length of the first lens group is f1 and the focal length of the 1nth lens closest to the object side of the first lens group is f1n, |f1 / f1n|>0.05 (13) When the protection filter and a lens equivalent to the protection filter attached adjacent to the object side of the zoom lens are considered to be included in the first lens group and the formula (13) is evaluated, if the formula (13) is not satisfied, the attachment is not considered to be included in the first lens group, i.e., the zoom lens of the present invention.

[0028] The specific configuration of the zoom lens of the present invention will be described below starting from the features of the lens configurations of Numerical Examples 1 to 7 corresponding to Examples 1 to 7. EXAMPLES

[0029] FIG. 1 is a lens cross-sectional view of a zoom lens according to embodiment 1 (numerical embodiment 1) of the present invention, when the lens is focused on infinity at the wide-angle end. In FIG. 2, (a) shows a longitudinal aberration diagram of the wide-angle end of numerical embodiment 1, (b) shows a focal length of 220.03 mm of numerical embodiment 1, and (c) shows a longitudinal aberration diagram of the telephoto end of numerical embodiment 1. All of the aberration diagrams are longitudinal aberration diagrams when the lens is focused on infinity. The focal length values ​​are values ​​when the numerical embodiments described later are expressed in mm. This is the same for all of the numerical embodiments described below.

[0030] In FIG. 1, in order from the object side to the image side, the first lens group L1 has a positive refractive power for focusing. Furthermore, when zooming from the wide-angle end to the telephoto end, the second lens group L2 has a negative refractive power for zooming, which moves toward the image side, and the third lens group L3 has a positive refractive power, which moves toward the object side. Furthermore, the fourth lens group L4 has a positive refractive power, which moves nonlinearly on the optical axis in conjunction with the movement of the second lens group L2 and the third lens group L3, and corrects the image plane fluctuation caused by zooming. Furthermore, the fifth lens group L5 has an imaging function that does not move for zooming. In this embodiment, the Nth lens group corresponds to the second lens group L2, the P lens group corresponds to the fourth lens group L4, the V lens group corresponds to the second lens group L2, and the C lens group corresponds to the third lens group L3 and the fourth lens group L4. The focal length of 220.03 mm is the zoom position where the composite lateral magnification of the Vth lens group is -1x.

[0031] In this embodiment, the second lens group L2, the third lens group L3, and the fourth lens group L4 constitute a variable magnification system. SP is an aperture stop, which is disposed between the fourth lens group L4 and the fifth lens group L5. The aperture stop does not move in the optical axis direction during zooming. P is a glass block representing a color separation prism or an optical filter. I is an image plane, which corresponds to the imaging plane of a solid-state imaging element (photoelectric conversion element) that receives and photoelectrically converts an image formed by the zoom lens when used as an imaging optical system for a broadcast television camera, a video camera, or a digital still camera. When used as an imaging optical system for a film camera, it corresponds to the film surface to which the image formed by the zoom lens is exposed.

[0032] In the longitudinal aberration diagrams, the solid and two-dot chain lines in the spherical aberration are the e-line and g-line, respectively. In the astigmatism diagrams, the dotted and solid lines are the meridional and sagittal image planes, respectively, and in the lateral chromatic aberration, the two-dot chain line, the one-dot chain line, and the dotted lines are the g-line, C-line, and F-line, respectively. ω is the half angle of view, and Fno is the F-number. In the longitudinal aberration diagrams, the spherical aberration is drawn on a scale of 0.4 mm, the astigmatism is drawn on a scale of 0.4 mm, the distortion is drawn on a scale of 10%, and the lateral chromatic aberration is drawn on a scale of 0.1 mm. In the following examples, the wide-angle end and the telephoto end refer to the zoom positions when the second lens group L2 for zooming is located at both ends of the range in which it can move on the optical axis relative to the mechanism.

[0033] The first lens group L1 corresponds to surfaces 1 to 12. The second lens group L2 corresponds to surfaces 13 to 19, the third lens group L3 corresponds to surfaces 20 to 25, and the fourth lens group L4 corresponds to surfaces 26 to 30. The fifth lens group L5 corresponds to surfaces 31 to 53. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close-up side. The eleventh lens group L11 corresponds to surfaces 1 to 6, and the twelfth lens group L12 corresponds to surfaces 7 to 12. The first lens group L1 is composed of six lenses, in order from the object side, a biconcave lens, a biconvex lens, a biconvex lens, a meniscus convex lens concave on the image side, and a meniscus convex lens concave on the image side.

[0034] Numerical Example 1 corresponding to the above-mentioned Example 1 will be described. In all the numerical examples, not just Numerical Example 1, i indicates the order of the surface (optical surface) from the object side, ri indicates the radius of curvature of the i-th surface from the object side, and di indicates the distance (on the optical axis) between the i-th surface and the i+1-th surface from the object side. Also, ndi, νdi, and θgFi indicate the refractive index, Abbe number, and partial dispersion ratio of the medium (optical member) between the i-th surface and the i+1-th surface, and BF indicates the back focus in air equivalent. The aspheric shape is expressed by the following formula, where the X-axis is in the optical axis direction, the H-axis is perpendicular to the optical axis, the light traveling direction is positive, R is the paraxial radius of curvature, k is the cone constant, and A3 to A16 are the aspheric coefficients. Also, "eZ" is "×10 -Z " means.

number

[0035] FIG. 15 is a schematic diagram of an imaging device (television camera system) using the zoom lens of each embodiment as an imaging optical system. In FIG. 15, 101 is a zoom lens of any of the embodiments 1 to 7. 124 is a camera. The zoom lens 101 is detachable from the camera 124. 125 is an imaging device configured by mounting the zoom lens 101 to the camera 124. The zoom lens 101 has a first lens group F, a zoom section LZ, and a rear group R for imaging. The first lens group F includes a focusing lens group. The zoom section LZ includes a second lens group, a third lens group, which move on the optical axis during zooming, and a fourth lens group, which moves on the optical axis to correct image plane fluctuations associated with zooming. SP is an aperture stop. 114 and 115 are driving mechanisms such as helicoids and cams that drive the first lens group F and the zoom section LZ in the optical axis direction, respectively. Reference numerals 116 to 118 denote motors (driving means) that electrically drive the driving mechanisms 114 and 115 and the aperture stop SP. Reference numerals 119 to 121 denote detectors such as encoders, potentiometers, or photosensors for detecting the positions on the optical axis of the first lens group F and the zoom section LZ and the aperture diameter of the aperture stop SP. In the camera 124, reference numeral 109 denotes a glass block corresponding to an optical filter or color separation optical system in the camera 124, and reference numeral 110 denotes a solid-state imaging element (photoelectric conversion element) such as a CCD sensor or CMOS sensor that receives a subject image formed by the zoom lens 101. Reference numerals 111 and 122 denote CPUs that control various drives of the camera 124 and the zoom lens 101.

[0036] In this way, by applying the zoom lens of the present invention to a television camera, an image pickup apparatus having high optical performance is realized. EXAMPLES

[0037] Fig. 3 is a lens cross-sectional view of a zoom lens according to embodiment 2 (numerical embodiment 2) of the present invention when the lens is focused at infinity at the wide-angle end. In Fig. 4, (a) shows longitudinal aberration diagrams of the wide-angle end of numerical embodiment 2, (b) shows longitudinal aberration diagrams of the focal length of 208.08 mm of numerical embodiment 2, and (c) shows longitudinal aberration diagrams of the telephoto end of numerical embodiment 2. All of the aberration diagrams are longitudinal aberration diagrams when the lens is focused at infinity.

[0038] In FIG. 3, from the object side, the lens has a first lens group L1 with positive refractive power for focusing. Furthermore, when zooming from the wide-angle end to the telephoto end, the lens has a second lens group L2 with negative refractive power for zooming that moves toward the image side, and a third lens group L3 with positive refractive power that moves toward the object side. Furthermore, the lens has a fourth lens group L4 with positive refractive power that moves nonlinearly on the optical axis in conjunction with the movement of the second lens group L2 and the third lens group L3 to correct the image plane fluctuation caused by zooming. Furthermore, the lens has a fifth lens group L5 with an imaging function that does not move for zooming. In this embodiment, the N lens group corresponds to the second lens group L2, the P lens group corresponds to the fourth lens group L4, the V lens group corresponds to the second lens group L2, and the C lens group corresponds to the third lens group L3 and the fourth lens group L4. The focal length of 208.08 mm is the zoom position where the composite lateral magnification of the V lens group is -1x.

[0039] In this embodiment, the second lens group L2, the third lens group L3, and the fourth lens group L4 constitute a variable power system. SP denotes an aperture stop, and is disposed between the fourth lens group L4 and the fifth lens group L5. The aperture stop SP does not move in the optical axis direction during zooming.

[0040] The first lens group L1 corresponds to surfaces 1 to 12. The second lens group L2 corresponds to surfaces 13 to 19, the third lens group L3 corresponds to surfaces 20 to 25, and the fourth lens group L4 corresponds to surfaces 26 to 30. The fifth lens group L5 corresponds to surfaces 31 to 53. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close-up side. The eleventh lens group L11 corresponds to surfaces 1 to 6, and the twelfth lens group L12 corresponds to surfaces 7 to 12. The first lens group L1 is composed of six lenses, in order from the object side, a biconcave lens, a biconvex lens, a biconvex lens, a meniscus convex lens concave on the image side, and a meniscus convex lens concave on the image side.

[0041] Values ​​corresponding to each conditional expression in this embodiment are shown in Table 1. This embodiment satisfies expressions (1) to (13), and by appropriately setting the refractive power of the first lens group and the amount of movement of the lens groups that move during zooming, a zoom lens that has a wide angle of view, a high zoom ratio, is compact and lightweight, and has high optical performance over the entire zoom range is achieved. EXAMPLES

[0042] Fig. 5 is a lens cross-sectional view of a zoom lens according to embodiment 3 (numerical embodiment 3) of the present invention when the lens is focused at infinity at the wide-angle end. In Fig. 6, (a) shows longitudinal aberration diagrams of the wide-angle end of numerical embodiment 3, (b) shows longitudinal aberration diagrams of the focal length of 260.97 mm of numerical embodiment 3, and (c) shows longitudinal aberration diagrams of the telephoto end of numerical embodiment 3. All of the aberration diagrams are longitudinal aberration diagrams when the lens is focused at infinity.

[0043] In FIG. 5, from the object side, the first lens group L1 has a positive refractive power for focusing. Furthermore, when zooming from the wide-angle end to the telephoto end, the second lens group L2 has a negative refractive power for zooming, which moves toward the image side, and the third lens group L3 has a positive refractive power, which moves toward the object side. Furthermore, the fourth lens group L4 has a positive refractive power, which moves nonlinearly on the optical axis in conjunction with the movement of the second lens group L2 and the third lens group L3, and corrects the image plane fluctuation caused by zooming. Furthermore, the fifth lens group L5 has an imaging function that does not move for zooming. In this embodiment, the N lens group corresponds to the second lens group L2, the P lens group corresponds to the fourth lens group L4, the V lens group corresponds to the second lens group L2, and the C lens group corresponds to the third lens group L3 and the fourth lens group L4. The focal length of 260.97 mm is the zoom position where the composite lateral magnification of the V lens group is -1x.

[0044] In this embodiment, the second lens group L2, the third lens group L3, and the fourth lens group L4 constitute a variable power system. SP denotes an aperture stop, and is disposed between the fourth lens group L4 and the fifth lens group L5. The aperture stop SP does not move in the optical axis direction during zooming.

[0045] The first lens group L1 corresponds to surfaces 1 to 12. The second lens group L2 corresponds to surfaces 13 to 19, the third lens group L3 corresponds to surfaces 20 to 25, and the fourth lens group L4 corresponds to surfaces 26 to 30. The fifth lens group L5 corresponds to surfaces 31 to 53. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close-up side. The eleventh lens group L11 corresponds to surfaces 1 to 6, and the twelfth lens group L12 corresponds to surfaces 7 to 12. The first lens group L1 is composed of six lenses, in order from the object side, a biconcave lens, a biconvex lens, a biconvex lens, a meniscus convex lens concave on the image side, and a meniscus convex lens concave on the image side.

[0046] Values ​​corresponding to each conditional expression in this embodiment are shown in Table 1. This embodiment satisfies expressions (1) to (13), and by appropriately setting the refractive power of the first lens group and the amount of movement of the lens groups that move during zooming, a zoom lens that has a wide angle of view, a high zoom ratio, is compact and lightweight, and has high optical performance over the entire zoom range is achieved. EXAMPLES

[0047] Fig. 7 is a lens cross-sectional view of a zoom lens according to embodiment 4 (numerical embodiment 4) of the present invention when the lens is focused at infinity at the wide-angle end. In Fig. 8, (a) shows longitudinal aberration diagrams of the wide-angle end of numerical embodiment 4, (b) shows longitudinal aberration diagrams of the focal length of 210.60 mm of numerical embodiment 4, and (c) shows longitudinal aberration diagrams of the telephoto end of numerical embodiment 4. All of the aberration diagrams are longitudinal aberration diagrams when the lens is focused at infinity.

[0048] In FIG. 7, from the object side, the first lens group L1 has a positive refractive power for focusing. In addition, when zooming from the wide-angle end to the telephoto end, the second lens group L2 has a negative refractive power for zooming, which moves toward the image side, and the third lens group L3 and the fourth lens group L4 have a positive refractive power and move toward the object side. In addition, the fifth lens group L5 has a positive refractive power and moves nonlinearly on the optical axis in conjunction with the movement of the second lens group L2, the third lens group L3, and the fourth lens group L4 to correct the image plane fluctuation caused by zooming. In addition, the sixth lens group L6 has an imaging function that does not move for zooming. In this embodiment, the N lens group corresponds to the second lens group L2, the P lens group corresponds to the fifth lens group L5, the V lens group corresponds to the second lens group L2, and the C lens group corresponds to the third lens group L3, the fourth lens group L4, and the fifth lens group L5. Incidentally, the focal length of 210.60 mm is the zoom position where the composite lateral magnification of the Vth lens group is −1x.

[0049] In this embodiment, the magnification variable system is made up of the second lens group L2, the third lens group L3, the fourth lens group L4, and the fifth lens group L5. SP is an aperture stop, and is disposed between the fifth lens group L5 and the sixth lens group L6. The aperture stop SP does not move in the optical axis direction during zooming.

[0050] The first lens group L1 corresponds to surfaces 1 to 12. The second lens group L2 corresponds to surfaces 13 to 19, the third lens group L3 corresponds to surfaces 20 to 21, and the fourth lens group L4 corresponds to surfaces 22 to 26. The fifth lens group L5 corresponds to surfaces 27 to 31, and the sixth lens group L6 corresponds to surfaces 32 to 54. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close-up side. The eleventh lens group L11 corresponds to surfaces 1 to 6, and the twelfth lens group L12 corresponds to surfaces 7 to 12. The first lens group L1 is made up of six lenses: a biconcave lens, a biconvex lens, a biconvex lens, a biconvex lens, a meniscus convex lens with a concave surface facing the image side, and a meniscus convex lens with a concave surface facing the image side. Values ​​corresponding to each conditional expression in this embodiment are shown in Table 1. This embodiment satisfies expressions (1) to (5) and (7) to (13), and by appropriately setting the refractive power of the first lens group and the amount of movement of the lens groups that move during zooming, a zoom lens that has a wide angle of view, a high zoom ratio, is compact and lightweight, and has high optical performance over the entire zoom range is achieved. EXAMPLES

[0051] Fig. 9 is a lens cross-sectional view of a zoom lens according to embodiment 5 (numerical embodiment 5) of the present invention when the lens is focused at infinity at the wide-angle end. In Fig. 10, (a) shows longitudinal aberration diagrams of Numerical embodiment 5 at the wide-angle end, (b) shows longitudinal aberration diagrams of Numerical embodiment 5 at a focal length of 221.43 mm, and (c) shows longitudinal aberration diagrams of Numerical embodiment 5 at the telephoto end. All of the aberration diagrams are longitudinal aberration diagrams when the lens is focused at infinity.

[0052] In FIG. 9, from the object side, the first lens group L1 has a positive refractive power for focusing. Furthermore, when zooming from the wide-angle end to the telephoto end, the second lens group L2 has a negative refractive power for zooming, which moves toward the image side, the third lens group L3 has a negative refractive power that moves toward the image side, and the fourth lens group L4 has a positive refractive power that moves toward the object side. Furthermore, the fifth lens group L5 has a positive refractive power that moves nonlinearly on the optical axis in conjunction with the movement of the second lens group L2, the third lens group L3, and the fourth lens group L4, and corrects the image plane fluctuation caused by zooming. Furthermore, the sixth lens group L6 has an imaging function that does not move for zooming. In this embodiment, the N lens group corresponds to the third lens group L3, the P lens group corresponds to the fourth lens group L4, the V lens group corresponds to the second lens group L2 and the third lens group L3, and the C lens group corresponds to the fourth lens group L4 and the fifth lens group L5. Incidentally, the focal length of 221.43 mm is the zoom position where the composite lateral magnification of the Vth lens group is -1x.

[0053] In this embodiment, the magnification variable system is made up of the second lens group L2, the third lens group L3, the fourth lens group L4, and the fifth lens group L5. SP is an aperture stop, and is disposed between the fifth lens group L5 and the sixth lens group L6. The aperture stop SP does not move in the optical axis direction during zooming.

[0054] The first lens group L1 corresponds to surfaces 1 to 12. The second lens group L2 corresponds to surfaces 13 to 17, the third lens group L3 corresponds to surfaces 18 to 20, the fourth lens group L4 corresponds to surfaces 21 to 26, and the fifth lens group L5 corresponds to surfaces 27 to 31. The sixth lens group L6 corresponds to surfaces 32 to 54. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close-up side. The eleventh lens group L11 corresponds to surfaces 1 to 6, and the twelfth lens group L12 corresponds to surfaces 7 to 12. The first lens group L1 is made up of six lenses: a biconcave lens, a biconvex lens, a biconvex lens, a biconvex lens, a meniscus convex lens with a concave surface facing the image side, and a meniscus convex lens with a concave surface facing the image side.

[0055] Values ​​corresponding to each conditional expression in this embodiment are shown in Table 1. This embodiment satisfies expressions (1) to (13), and by appropriately setting the refractive power of the first lens group and the amount of movement of the lens groups that move during zooming, a zoom lens that has a wide angle of view, a high zoom ratio, is compact and lightweight, and has high optical performance over the entire zoom range is achieved. EXAMPLES

[0056] Fig. 11 is a lens cross-sectional view of a zoom lens according to embodiment 6 (numerical embodiment 6) of the present invention when the lens is focused at infinity at the wide-angle end. In Fig. 12, (a) shows longitudinal aberration diagrams of Numerical embodiment 6 at the wide-angle end, (b) shows longitudinal aberration diagrams of Numerical embodiment 6 at a focal length of 251.82 mm, and (c) shows longitudinal aberration diagrams of Numerical embodiment 6 at the telephoto end. All of the aberration diagrams are longitudinal aberration diagrams when the lens is focused at infinity.

[0057] In FIG. 12, from the object side, the first lens group L1 has a positive refractive power for focusing. Furthermore, when zooming from the wide-angle end to the telephoto end, the second lens group L2 has a negative refractive power for zooming, which moves toward the image side, and the third lens group L3 has a positive refractive power, which moves toward the object side. Furthermore, the fourth lens group L4 has a positive refractive power, which moves nonlinearly on the optical axis in conjunction with the movement of the second lens group L2 and the third lens group L3, and corrects the image plane fluctuation caused by zooming. Furthermore, the fifth lens group L5 has an imaging function that does not move for zooming. In this embodiment, the N lens group corresponds to the second lens group L2, the P lens group corresponds to the fourth lens group L4, the V lens group corresponds to the second lens group L2, and the C lens group corresponds to the third lens group L3 and the fourth lens group L4. The focal length of 208.08 mm is a zoom position where the composite lateral magnification of the V lens group and the composite lateral magnification of the C lens group are simultaneously -1x.

[0058] In this embodiment, the second lens group L2, the third lens group L3, and the fourth lens group L4 constitute a variable power system. SP denotes an aperture stop, and is disposed between the fourth lens group L4 and the fifth lens group L5. The aperture stop SP does not move in the optical axis direction during zooming.

[0059] The first lens group L1 corresponds to the first to twelfth surfaces. The second lens group L2 corresponds to the thirteenth to twenty-third surfaces, the third lens group L3 corresponds to the twenty-fourth to twenty-eighth surfaces, and the fourth lens group L4 corresponds to the twenty-ninth to thirty-fifth surfaces. The fifth lens group L5 corresponds to the thirty-sixth to fifty-ninth surfaces. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close-up side. The eleventh lens group L11 corresponds to the first to sixth surfaces, and the twelfth lens group L12 corresponds to the seventh to twelfth surfaces. The first lens group L1 is composed of six lenses, in order from the object side, a biconcave lens, a biconvex lens, a biconvex lens, a meniscus convex lens concave on the image side, and a meniscus convex lens concave on the image side.

[0060] Values ​​corresponding to each conditional expression in this embodiment are shown in Table 1. This embodiment satisfies expressions (1) to (13), and by appropriately setting the refractive power of the first lens group and the amount of movement of the lens groups that move during zooming, a zoom lens that has a wide angle of view, a high zoom ratio, is compact and lightweight, and has high optical performance over the entire zoom range is achieved. EXAMPLES

[0061] Fig. 13 is a lens cross-sectional view of a zoom lens according to embodiment 7 (numerical embodiment 7) of the present invention when the lens is focused at infinity at the wide-angle end. In Fig. 14, (a) shows longitudinal aberration diagrams of the wide-angle end of numerical embodiment 7, (b) shows longitudinal aberration diagrams of the focal length of 219.95 mm of numerical embodiment 7, and (c) shows longitudinal aberration diagrams of the telephoto end of numerical embodiment 7. All of the aberration diagrams are longitudinal aberration diagrams when the lens is focused at infinity.

[0062] In FIG. 13, from the object side, the first lens group L1 has a positive refractive power for focusing. Furthermore, when zooming from the wide-angle end to the telephoto end, the second lens group L2 has a negative refractive power for zooming, which moves toward the image side, the third lens group L3 has a positive refractive power, which moves toward the image side, and the fourth lens group L4 has a positive refractive power, which moves toward the object side. Furthermore, the fifth lens group L5 has a positive refractive power, which moves nonlinearly on the optical axis in conjunction with the movement of the second lens group L2, the third lens group L3, and the fourth lens group L4, and corrects the image plane fluctuation caused by zooming. Furthermore, the sixth lens group L6 has an imaging function that does not move for zooming. In this embodiment, the N lens group corresponds to the second lens group L2, the P lens group corresponds to the fourth lens group L4, the V lens group corresponds to the second lens group L2 and the third lens group L3, and the C lens group corresponds to the fourth lens group L4 and the fifth lens group L5. Incidentally, the focal length of 219.95 mm is the zoom position where the composite lateral magnification of the Vth lens group is -1x.

[0063] In this embodiment, the magnification variable system is made up of the second lens group L2, the third lens group L3, the fourth lens group L4, and the fifth lens group L5. SP is an aperture stop, and is disposed between the fifth lens group L5 and the sixth lens group L6. The aperture stop SP does not move in the optical axis direction during zooming.

[0064] The first lens group L1 corresponds to surfaces 1 to 12. The second lens group L2 corresponds to surfaces 13 to 17, the third lens group L3 corresponds to surfaces 18 to 21, the fourth lens group L4 corresponds to surfaces 22 to 27, and the fifth lens group L5 corresponds to surfaces 28 to 32. The sixth lens group L6 corresponds to surfaces 33 to 55. The first lens group L1 is composed of an eleventh lens group L11 that does not move during focusing, and a twelfth lens group L12 with positive refractive power that moves during focusing from the infinity side to the close-up side. The eleventh lens group L11 corresponds to surfaces 1 to 6, and the twelfth lens group L12 corresponds to surfaces 7 to 12. The first lens group L1 is made up of six lenses: a biconcave lens, a biconvex lens, a biconvex lens, a biconvex lens, a meniscus convex lens with a concave surface facing the image side, and a meniscus convex lens with a concave surface facing the image side.

[0065] Values ​​corresponding to each conditional expression in this embodiment are shown in Table 1. This embodiment satisfies expressions (1) to (13), and by appropriately setting the refractive power of the first lens group and the amount of movement of the lens groups that move during zooming, a zoom lens that has a wide angle of view, a high zoom ratio, is compact and lightweight, and has high optical performance over the entire zoom range is achieved.

[0066] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. The present invention is characterized in that the lens configuration, refractive power, and glass material of the first lens group are appropriately set, and the effects of the present invention can be achieved even if the rear group, which is the lens group closer to the image side than the second lens group, has a configuration other than those of Numerical Examples 1 to 7.

[0067] <Numerical Example 1> Unit: mm Surface Data Surface number rd nd vd Effective diameter 1 -2221.349 6.00 1.83481 42.7 218.21 2 342.333 1.50 205.55 3 340.133 24.31 1.43387 95.1 204.91 4 -911.250 0.20 203.54 5 565.719 14.49 1.43387 95.1 198.63 6 -1543.644 24.80 198.74 7 376.540 17.36 1.43387 95.1 198.96 8 -3838.033 0.25 198.53 9 295.848 17.80 1.43387 95.1 193.97 10 3814.344 1.60 192.94 11 192.957 15.11 1.43387 95.1 180.65 12 420.467 (variable) 179.06 13* -238.965 2.20 2.00330 28.3 45.54 14 36.896 10.74 38.74 15 -52.546 1.45 1.80610 40.9 37.98 16 47.404 11.69 1.89286 20.4 39.04 17 -48.436 3.85 39.26 18 -38.895 2.00 1.83481 42.7 36.51 19 -128.592 (variable) 38.68 20 120.021 10.14 1.78800 47.4 82.48 21* -749.646 2.46 82.39 22 119.605 16.42 1.43875 94.7 82.54 23 -148.456 0.50 81.84 24 181.335 2.50 1.85478 24.8 75.70 25 74.456 (variable) 71.70 26 88.360 13.64 1.49700 81.5 71.29 27 -302.319 2.60 1.84666 23.8 69.97 28 10294.031 0.20 68.98 29* 293.116 6.81 1.53775 74.7 68.28 30 -219.650 (variable) 67.50 31(Aperture) ∞ 2.74 34.39 32 -607.740 1.40 1.88300 40.8 32.67 33 41.820 0.70 31.19 34 33.865 4.29 1.80810 22.8 31.34 35 91.433 4.58 30.64 36 -66.359 1.50 1.88300 40.8 29.92 37 -286.035 8.19 29.89 38 -149.141 1.50 1.89190 37.1 28.99 39 45.053 6.01 1.84666 23.8 29.14 40 -128.089 3.18 29.28 41 -43.757 1.50 1.88300 40.8 29.12 42 116.859 8.22 1.51742 52.4 30.48 43 -29.469 10.21 31.56 44 79.819 4.96 1.53172 48.8 31.41 45 -88.967 1.40 31.11 46 -82.335 1.50 1.89190 37.1 30.54 47 34.621 7.78 1.48749 70.2 30.30 48 -73.557 0.20 30.90 49 130.522 7.48 1.51633 64.1 31.25 50 -32.217 1.50 1.88300 40.8 31.26 51 -85.050 0.20 32.12 52 90.792 7.25 1.54814 45.8 32.32 53 -46.746 10.00 32.06 54 ∞ 33.00 1.60859 46.4 60.00 55 ∞ 13.20 1.51633 64.2 60.00 56∞ 13.00 60.00 Image plane ∞ Aspheric Data Page 13 K =-1.93181e+00 A 4= 2.22919e-06 A 6= 2.38151e-08 A 8= 7.72743e-10 A10= 2.13595e-12 A12=-3.64187e-15 A14=-4.78958e-18 A16=-3.47247e-22 A 3= 2.52939e-07 A 5=-4.19447e-08 A 7=-5.95656e-09 A 9=-5.68561e-11 A11=-4.13651e-15 A13= 1.87641e-16 A15= 6.43023e-20 Page 21 K = 1.95058e+00 A 4= 3.74052e-07 A 6= 1.99549e-10 A 8= 2.51258e-13 A10=-2.73849e-17 A12=-1.59352e-19 A14=-1.48582e-23 A16=-5.53240e-27 A 3=-1.37836e-07 A 5=-2.64991e-09 A 7=-9.23121e-12 A 9=-3.74119e-15 A11= 5.03388e-18 A13= 1.89531e-21 A15= 4.46991e-25 Page 29 K =-2.00000e+00 A 4= 1.60386e-07 A 6= 1.28452e-08 A 8= 5.45892e-11 A10=-6.18393e-15 A12= 3.22244e-18 A14= 3.40708e-20 A16= 1.98023e-24 A 3=-1.02506e-06 A 5=-8.91670e-08 A 7=-1.10781e-09 A 9=-1.25958e-12 A11= 8.63627e-16 A13=-1.17716e-18 A15=-4.20681e-22 Various data Zoom ratio 144.44 Wide Angle Mid-Telephoto Focal length 8.10 220.03 1169.95 F-number 1.76 1.76 6.08 Half angle of view 34.18 1.43 0.27 Image height 5.50 5.50 5.50 Lens total length 680.44 680.44 680.44 BF 13.00 13.00 13.00 d12 4.04 184.81 197.98 d19 297.46 85.16 2.00 d25 9.84 4.30 8.70 d30 2.98 40.05 105.65 d56 13.00 13.00 13.00 Entrance pupil position 129.66 2638.84 17486.29 Exit pupil position 237.07 237.07 237.07 Front principal point position 138.06 3074.94 24765.04 Back principal point position 4.90 -207.03 -1156.95 Zoom lens group data Group Starting plane Focal length Lens length Front principal point position Rear principal point position 1 1 251.69 123.43 71.51 -18.33 2 13 -22.51 31.93 3.51 -18.59 3 20 121.34 32.01 -6.54 -25.79 4 26 118.74 23.25 5.37 -10.20 5 31 46.47 142.50 59.14 20.10

[0068] <Numerical Example 2> Unit: mm Surface Data Surface number rd nd vd Effective diameter 1 -1043.825 5.50 1.83481 42.7 220.03 2 366.721 1.50 207.67 3 364.032 28.91 1.43387 95.1 207.11 4 -609.037 0.20 204.84 5 646.639 15.07 1.43387 95.1 201.33 6 -1086.757 21.44 201.51 7 372.369 19.69 1.43387 95.1 202.24 8 -1701.210 0.25 201.82 9 266.948 18.73 1.43387 95.1 195.72 10 1888.740 1.60 194.58 11 179.319 16.25 1.43875 94.7 180.92 12 387.193 (variable) 179.22 13* -218.239 2.20 2.00330 28.3 42.44 14 32.360 11.03 35.55 15 -40.060 1.45 1.80610 40.9 34.75 16 49.409 12.39 1.89286 20.4 36.48 17 -44.678 3.76 37.64 18 -35.178 2.00 1.83481 42.7 37.82 19 -70.135 (variable) 40.50 20 152.043 9.44 1.78800 47.4 79.79 21* -1353.842 6.22 80.05 22 107.185 17.31 1.43875 94.7 82.57 23 -156.466 0.50 82.09 24 152.341 2.50 1.85478 24.8 77.10 25 75.362 (variable) 73.63 26 80.922 14.65 1.49700 81.5 73.82 27 -299.009 0.50 72.71 28 415.877 2.50 1.84666 23.8 70.09 29 155.921 6.43 1.59522 67.7 68.14 30* -946.891 (variable) 67.14 31(Aperture) ∞ 2.65 34.39 32 -964.271 1.40 1.88300 40.8 32.78 33 42.981 0.58 31.38 34 33.712 4.47 1.80810 22.8 31.53 35 100.338 4.51 30.82 36 -66.006 1.50 1.88300 40.8 30.04 37 -836.881 8.65 29.96 38 -357.842 1.50 1.89190 37.1 29.29 39 40.193 6.16 1.84666 23.8 29.28 40 -272.917 2.91 29.32 41 -60.533 1.50 1.88300 40.8 29.23 42 67.074 10.21 1.51742 52.4 30.22 43 -29.932 8.33 31.68 44 55.256 5.15 1.53172 48.8 30.68 45 -121.213 1.40 30.19 46 -67.916 1.50 1.89190 37.1 29.83 47 30.576 7.87 1.48749 70.2 29.50 48 -82.637 0.20 30.18 49 186.024 7.44 1.51633 64.1 30.61 50 -29.654 1.50 1.88300 40.8 30.78 51 -73.503 0.20 31.94 52 90.956 6.92 1.54814 45.8 32.44 53 -40.757 10.00 32.36 54 ∞ 33.00 1.60859 46.4 60.00 55 ∞ 13.20 1.51633 64.2 60.00 56∞ 13.00 60.00 Image plane ∞ Aspheric Data Page 13 K =-2.00000e+00 A 4= 3.44369e-06 A 6= 1.75215e-08 A 8= 7.54946e-10 A10= 2.14912e-12 A12=-3.63493e-15 A14=-4.81730e-18 A16=-2.42956e-22 A 3= 2.85376e-07 A 5=-2.62114e-08 A 7=-5.36345e-09 A 9=-5.75280e-11 A11=-2.11882e-15 A13= 1.84793e-16 A15= 6.35958e-20 Page 21 K = 2.00000e+00 A 4= 2.64491e-07 A 6= 1.64486e-10 A 8= 2.81450e-13 A10=-1.53239e-17 A12=-1.64838e-19 A14=-1.42788e-23 A16=-8.46539e-27 A 3=-1.58738e-07 A 5=-1.55150e-09 A 7=-9.40854e-12 A 9=-4.09584e-15 A11= 4.65152e-18 A13= 1.98486e-21 A15= 6.05850e-25 Page 30 K =-2.38519e+02 A 4= 2.47257e-07 A 6= 3.38998e-10 A 8= 4.88176e-14 A10=-2.01015e-16 A12= 2.29490e-19 A14=-2.08445e-22 A16= 2.48948e-26 A 3= 4.99600e-07 A 5=-1.93641e-09 A 7=-1.30855e-11 A 9= 1.12625e-14 A11=-8.21095e-18 A13= 5.19906e-21 A15= 5.36432e-25 Various data Zoom ratio 130.00 Wide Angle Mid-Telephoto Focal length 7.90 208.08 1026.97 F-number 1.76 1.76 5.34 Half angle of view 34.85 1.51 0.31 Image height 5.50 5.50 5.50 Lens total length 673.04 673.04 673.04 BF 13.00 13.00 13.00 d12 3.91 170.96 183.51 d19 278.18 77.24 2.00 d25 10.20 3.45 3.75 d30 2.96 43.61 106.00 d56 13.00 13.00 13.00 Entrance pupil position 127.37 2394.75 14430.30 Exit pupil position 232.15 232.15 232.15 Front principal point position 135.56 2800.39 20269.74 Back principal point position 5.10 -195.08 -1013.97 Zoom lens group data Group starting plane Focal length Lens length Front principal point position Rear principal point position 1 1 233.00 129.14 74.15 -16.84 2 13 -21.53 32.82 2.14 -22.04 3 20 133.90 35.97 -4.30 -27.75 4 26 115.12 24.09 3.23 -12.64 5 31 46.80 142.77 59.82 17.22

[0069] <Numerical Example 3> Unit: mm Surface Data Surface number rd nd vd Effective diameter 1 -2640.787 6.00 1.83481 42.7 217.94 2 336.021 1.50 205.56 3 333.782 24.22 1.43387 95.1 205.20 4 -982.483 0.20 204.25 5 572.375 14.77 1.43387 95.1 203.94 6 -1669.583 24.51 204.06 7 366.303 19.18 1.43387 95.1 204.59 8 -2715.734 0.25 204.15 9 294.365 18.26 1.43387 95.1 198.83 10 2906.754 1.60 197.76 11 189.946 15.80 1.43387 95.1 184.45 12 408.286 (variable) 182.82 13* -341.785 2.20 2.00330 28.3 42.45 14 34.515 10.27 36.00 15 -46.098 1.45 1.80610 40.9 35.09 16 48.098 11.91 1.89286 20.4 35.96 17 -45.986 1.41 37.56 18 -37.502 2.00 1.83481 42.7 37.56 19 -115.875 (variable) 40.26 20 101.863 12.07 1.76385 48.5 84.37 21* -775.375 3.25 84.15 22 195.252 13.40 1.43875 94.7 83.98 23 -146.652 0.85 83.57 24 253.827 2.50 1.85478 24.8 78.51 25 81.675 (variable) 74.95 26 79.787 14.31 1.49700 81.5 76.40 27 -369.567 2.60 1.84666 23.8 75.63 28 1334.585 0.20 74.64 29* 223.959 9.17 1.53775 74.7 74.08 30 -153.782 (variable) 73.44 31(Aperture) ∞ 2.87 33.68 32 -377.940 1.40 1.88300 40.8 31.89 33 36.203 0.78 30.30 34 30.540 5.35 1.80810 22.8 30.65 35 204.910 3.50 29.95 36 -77.957 1.50 1.88300 40.8 28.99 37 193.909 9.11 28.59 38 -301.472 1.50 1.89190 37.1 27.80 39 39.221 3.85 1.84666 23.8 27.77 40 138.609 5.30 27.79 41 -80.184 1.50 1.88300 40.8 28.44 42 137.813 8.33 1.51742 52.4 29.41 43 -29.801 10.33 30.71 44 59.065 5.04 1.53172 48.8 30.72 45 -116.981 1.40 30.34 46 -68.241 1.50 1.89190 37.1 30.03 47 36.062 7.24 1.48749 70.2 29.98 48 -89.814 0.20 30.65 49 104.175 7.19 1.51633 64.1 31.20 50 -36.575 1.50 1.88300 40.8 31.28 51 -82.065 0.20 31.99 52 78.404 6.28 1.54814 45.8 32.11 53 -52.540 10.00 32.09 54 ∞ 33.00 1.60859 46.4 60.00 55 ∞ 13.20 1.51633 64.2 60.00 56∞12.99 60.00 Image plane ∞ Aspheric Data Page 13 K =-1.98003e+00 A 4= 2.20198e-06 A 6= 2.51518e-08 A 8= 8.03825e-10 A10= 1.57670e-12 A12=-4.66646e-15 A14=-2.78721e-18 A16= 1.80718e-22 A 3= 2.41302e-07 A 5=-3.66593e-08 A 7=-6.34925e-09 A 9=-5.47960e-11 A11= 3.59373e-14 A13= 1.67667e-16 A15= 1.19221e-20 Page 21 K = 7.94738e-01 A 4= 3.90977e-07 A 6=-1.66736e-09 A 8=-7.36421e-12 A10= 6.31669e-15 A12= 1.52958e-17 A14= 2.58533e-21 A16=-3.23171e-28 A 3=-9.36022e-08 A 5= 9.57405e-09 A 7= 1.50044e-10 A 9= 1.28810e-13 A11=-4.88837e-16 A13=-2.68027e-19 A15=-1.07510e-23 Page 29 K =-1.86470e+00 A 4=-1.88288e-07 A 6= 1.02042e-08 A 8= 5.62942e-11 A10= 5.40989e-14 A12= 6.52653e-17 A14= 3.92509e-20 A16= 1.70284e-24 A 3=-5.92818e-07 A 5=-6.42825e-08 A 7=-9.73542e-10 A 9=-2.05372e-12 A11=-1.63236e-15 A13=-2.05465e-18 A15=-4.02843e-22 Various data Zoom ratio 140.00 Wide Angle Mid-Telephoto Focal length 8.20 260.97 1147.98 F-number 1.77 1.76 5.80 Half angle of view 33.85 1.21 0.27 Image height 5.50 5.50 5.50 Lens total length 680.06 680.06 680.06 BF 12.99 12.99 12.99 d12 3.67 183.40 195.07 d19 289.44 65.94 2.00 d25 15.11 13.50 2.71 d30 2.90 48.27 111.34 d56 12.99 12.99 12.99 Entrance pupil position 130.21 2865.72 16950.50 Exit pupil position 181.90 181.90 181.90 Front principal point position 138.80 3529.93 25900.81 Back principal point position 4.79 -247.98 -1134.98 Zoom lens group data Group Starting plane Focal length Lens length Front principal point position Rear principal point position 1 1 250.00 126.29 71.99 -19.77 2 13 -22.00 29.24 2.85 -17.70 3 20 134.69 32.07 -9.12 -28.21 4 26 98.91 26.28 6.97 -10.85 5 31 41.99 142.06 56.80 20.82

[0070] <Numerical Example 4> Unit: mm Surface Data Surface number rd nd vd Effective diameter 1 -1555.043 5.00 1.83481 42.7 214.10 2 353.750 1.50 202.74 3 351.223 24.01 1.43387 95.1 202.15 4 -794.951 0.20 200.89 5 517.913 16.02 1.43387 95.1 201.35 6 -1396.076 23.31 201.45 7 389.370 19.31 1.43387 95.1 202.46 8 -1592.411 0.25 202.12 9 312.362 16.50 1.43387 95.1 197.53 10 2189.440 1.65 196.55 11 178.724 16.99 1.43387 95.1 184.19 12 389.334 (variable) 182.60 13* -221.493 2.20 2.00330 28.3 45.55 14 41.464 9.65 39.35 15 -63.287 1.45 1.80610 40.9 38.48 16 43.505 11.97 1.89286 20.4 38.69 17 -50.745 3.45 38.60 18 -39.588 2.00 1.83481 42.7 35.67 19 -377.493 (variable) 35.90 20 121.892 10.03 1.76385 48.5 82.90 21* -726.216 (variable) 82.81 22 113.831 16.58 1.43875 94.7 83.01 23 -155.147 0.68 82.30 24 189.566 2.20 1.85025 30.1 76.16 25 67.579 4.50 1.48749 70.2 71.71 26 84.449 (variable) 71.00 27 91.763 12.23 1.49700 81.5 70.35 28 -492.764 2.20 1.84666 23.8 69.05 29 735.845 0.15 68.08 30* 206.961 7.67 1.53775 74.7 67.46 31 -207.052 (variable) 66.66 32 (Aperture) ∞ 4.46 35.77 33 -225.885 1.40 1.88300 40.8 33.05 34 38.662 0.88 31.53 35 33.392 4.14 1.80810 22.8 31.94 36 74.832 4.95 31.35 37 -69.438 1.50 1.88300 40.8 30.92 38 -113.828 7.51 31.08 39 -98.347 1.50 1.89190 37.1 30.28 40 69.830 5.65 1.84666 23.8 30.68 41 -132.325 1.10 30.99 42 -237.028 1.50 1.88300 40.8 30.97 43 55.024 13.41 1.51742 52.4 31.21 44 -48.886 7.46 33.02 45 188.178 4.26 1.53172 48.8 32.60 46 -86.116 1.40 32.43 47 -55.004 1.50 1.89190 37.1 32.25 48 136.879 7.29 1.48749 70.2 32.81 49 -38.771 0.20 33.35 50 97.451 7.09 1.51633 64.1 32.58 51 -42.844 1.50 1.88300 40.8 32.04 52 -230.030 0.20 32.01 53 93.901 5.11 1.54814 45.8 31.72 54 -76.659 10.00 31.27 55 ∞ 33.00 1.60859 46.4 60.00 56 ∞ 13.20 1.51633 64.2 60.00 57∞ 12.90 60.00 Image plane ∞ Aspheric Data Page 13 K = 2.57263e-02 A 4= 2.06021e-06 A 6= 2.95254e-08 A 8= 8.51538e-10 A10= 3.03005e-12 A12=-4.03732e-15 A14=-3.74363e-18 A16= 5.40859e-22 A 3=-1.28433e-07 A 5=-8.75942e-08 A 7=-6.44264e-09 A 9=-6.86019e-11 A11=-2.96767e-14 A13= 2.11032e-16 A15=-6.68244e-22 Page 21 K =-1.16140e+00 A 4= 4.16737e-07 A 6= 3.33199e-10 A 8= 2.60425e-13 A10=-6.05661e-18 A12=-1.66061e-19 A14=-1.22475e-23 A16=-3.80232e-27 A 3=-2.58118e-07 A 5=-6.24072e-09 A 7=-1.08703e-11 A 9=-5.03203e-15 A11= 5.50700e-18 A13= 1.82229e-21 A15= 3.22254e-25 Page 30 K = 1.90377e+00 A 4= 4.01683e-08 A 6= 1.21219e-08 A 8= 5.42643e-11 A10=-5.92002e-15 A12= 3.32588e-18 A14= 3.39734e-20 A16= 1.89067e-24 A 3=-7.63348e-07 A 5=-7.89396e-08 A 7=-1.08224e-09 A 9=-1.26694e-12 A11= 8.61788e-16 A13=-1.18177e-18 A15=-4.13522e-22 Various data Zoom ratio 160.00 Wide Angle Mid-Telephoto Focal length 8.50 210.60 1359.98 F-number 1.77 1.76 7.00 Half angle of view 32.91 1.50 0.23 Image height 5.50 5.50 5.50 Lens total length 681.11 681.11 681.11 BF 12.90 12.90 12.90 d12 4.27 175.40 188.47 d19 297.58 94.87 2.00 d21 6.63 4.69 1.46 d26 4.79 4.05 3.64 d31 3.03 37.29 120.75 d57 12.90 12.90 12.90 Entrance pupil position 132.87 2525.33 21522.41 Exit pupil position 573.56 573.56 573.56 Front principal point position 141.50 2815.04 26181.25 Back principal point position 4.40 -197.70 -1347.08 Zoom lens group data Group starting plane Focal length Lens length Front principal point position Rear principal point position 1 1 243.98 124.75 70.39 -19.87 2 13 -22.00 30.71 4.71 -15.27 3 20 136.68 10.03 0.82 -4.88 4 22 2306.66 23.96 -181.00 -182.88 5 27 117.56 22.25 5.37 -9.52 6 32 55.43 140.21 61.65 23.46

[0071] <Numerical Example 5> Unit: mm Surface Data Surface number rd nd vd Effective diameter 1 -2101.929 6.00 1.83481 42.7 218.34 2 342.328 1.50 205.58 3 340.607 24.50 1.43387 95.1 204.94 4 -875.684 0.20 203.59 5 560.163 14.62 1.43387 95.1 198.75 6 -1533.335 24.57 198.85 7 377.116 17.19 1.43387 95.1 199.03 8 -4384.450 0.25 198.59 9 293.129 18.00 1.43387 95.1 194.06 10 3866.415 1.60 193.03 11 190.528 15.23 1.43387 95.1 180.54 12 412.617 (variable) 178.94 13* -535.729 2.20 2.00330 28.3 44.50 14 32.743 10.74 37.34 15 -53.839 1.45 1.80610 40.9 36.62 16 43.546 11.58 1.89286 20.4 37.52 17 -54.689 (variable) 37.71 18 -41.384 2.50 1.80518 25.4 36.31 19 -37.207 1.50 1.83481 42.7 37.11 20* -118.415 (variable) 39.36 21 118.835 11.27 1.78800 47.4 82.81 22* -1393.025 3.88 82.66 23 119.092 16.81 1.43875 94.7 83.12 24 -151.232 0.50 82.42 25 174.513 2.50 1.85478 24.8 76.46 26 73.619 (variable) 72.46 27 83.987 14.33 1.49700 81.5 72.35 28 -287.336 2.60 1.84666 23.8 71.08 29 -7693.666 0.20 70.10 30* 307.100 6.85 1.53775 74.7 69.38 31 -215.218 (variable) 68.61 32 (Aperture) ∞ 2.61 34.92 33 -1437.318 1.40 1.88300 40.8 33.21 34 38.725 0.77 31.58 35 32.559 5.07 1.80810 22.8 31.80 36 99.727 4.62 30.93 37 -63.305 1.50 1.88300 40.8 30.15 38 -315.783 8.22 30.11 39 -173.845 1.50 1.89190 37.1 29.23 40 42.468 4.87 1.84666 23.8 29.34 41 -447.471 2.98 29.42 42 -67.619 1.50 1.88300 40.8 29.44 43 86.019 10.10 1.51742 52.4 30.42 44 -31.109 9.67 31.99 45 63.074 4.92 1.53172 48.8 31.21 46 -127.855 1.40 30.79 47 -77.173 1.50 1.89190 37.1 30.41 48 34.257 7.50 1.48749 70.2 30.14 49 -87.239 0.20 30.73 50 127.064 7.31 1.51633 64.1 31.12 51 -33.484 1.50 1.88300 40.8 31.16 52 -84.848 0.20 31.99 53 82.918 6.46 1.54814 45.8 32.21 54 -48.094 10.00 32.00 55 ∞ 33.00 1.60859 46.4 60.00 56 ∞ 13.20 1.51633 64.2 60.00 57∞12.99 60.00 Image plane ∞ Aspheric Data Page 13 K = 3.58921e-01 A 4= 1.88098e-06 A 6= 2.39834e-08 A 8= 7.59027e-10 A10= 2.14113e-12 A12=-3.65983e-15 A14=-4.82700e-18 A16=-3.60162e-22 A 3=-1.47106e-07 A 5=-4.52292e-08 A 7=-5.85496e-09 A 9=-5.62715e-11 A11=-4.81713e-15 A13= 1.89219e-16 A15= 6.51550e-20 Page 20 K = 0.00000e+00 A 4=-2.38299e-07 A 6=-1.23927e-11 A 8=-7.52279e-14 Page 22 K = 2.00000e+00 A 4= 3.49606e-07 A 6= 2.24134e-10 A 8= 3.17632e-13 A10=-5.86994e-17 A12=-1.49856e-19 A14=-1.31141e-23 A16=-5.48418e-27 A 3=-9.98745e-08 A 5=-2.69982e-09 A 7=-1.11064e-11 A 9=-4.22950e-15 A11= 5.60505e-18 A13= 1.58601e-21 A15= 4.49484e-25 Page 30 K =-2.00000e+00 A 4= 7.24426e-08 A 6= 1.28878e-08 A 8= 5.47702e-11 A10=-6.17749e-15 A12= 2.87589e-18 A14= 3.38425e-20 A16= 1.96588e-24 A 3=-6.71400e-07 A 5=-8.77572e-08 A 7=-1.11210e-09 A 9=-1.26532e-12 A11= 8.72399e-16 A13=-1.16818e-18 A15=-4.17308e-22 Various data Zoom ratio 140.00 Wide Angle Mid-Telephoto Focal length 8.00 221.43 1119.99 F-number 1.77 1.77 5.82 Half angle of view 34.51 1.42 0.28 Image height 5.50 5.50 5.50 Lens total length 682.98 682.98 682.98 BF 12.99 12.99 12.99 d12 3.49 184.35 197.45 d17 3.19 3.03 3.99 d20 297.48 83.42 2.00 d26 8.29 4.01 10.54 d31 3.00 40.65 101.47 d57 12.99 12.99 12.99 Entrance pupil position 128.08 2647.44 16280.31 Exit pupil position 258.47 258.47 258.47 Front principal point position 136.34 3068.60 22510.09 Back principal point position 4.99 -208.44 -1107.00 Zoom lens group data Group Starting plane Focal length Lens length Front principal point position Rear principal point position 1 1 250.49 123.64 71.44 -18.42 2 13 -45.13 25.97 -6.66 -31.75 3 18 -77.05 4.00 -1.12 -3.37 4 21 127.59 34.96 -7.27 -28.50 5 27 113.84 23.98 5.47 -10.63 6 32 47.88 141.99 59.92 20.37

[0072] <Numerical Example 6> Unit: mm Surface Data Surface number rd nd vd Effective diameter 1 -1979.490 6.00 1.83481 42.7 216.00 2 356.735 1.60 203.78 3 355.588 24.20 1.43387 95.1 203.09 4 -773.722 0.20 201.73 5 556.581 14.23 1.43387 95.1 198.42 6 -1751.765 24.14 198.49 7 403.411 15.77 1.43387 95.1 198.20 8 -6837.871 0.25 197.78 9 286.795 18.64 1.43387 95.1 193.51 10 5493.466 1.60 192.50 11 190.061 15.47 1.43387 95.1 179.87 12 424.696 (variable) 178.28 13* 487.277 1.80 1.90366 31.3 44.35 14 43.289 7.54 38.60 15 -128.946 1.80 1.88300 40.8 36.92 16 43.897 4.92 1.43875 94.7 34.69 17 110.906 4.45 34.23 18 -54.799 1.80 1.90525 35.0 34.18 19 87.973 5.16 1.89286 20.4 37.20 20 -117.643 0.14 38.22 21 267.405 8.16 1.80518 25.4 40.56 22 -39.052 1.82 1.80400 46.5 41.18 23 -289.280 (variable) 43.96 24 266.014 13.34 1.49700 81.5 86.51 25* -128.569 0.20 87.24 26 231.088 11.04 1.43875 94.7 88.47 27 -242.563 2.52 1.59270 35.3 88.35 28 401.146 (variable) 88.30 29 118.659 13.66 1.43875 94.7 89.53 30 -347.072 0.12 89.20 31* 417.397 4.97 1.43875 94.7 87.72 32 -485.991 0.23 87.28 33 443.462 2.41 1.85025 30.1 85.40 34 136.534 14.00 1.43875 94.7 83.17 35 -175.018 (variable) 82.56 36 (Aperture) ∞ 5.74 40.56 37 -132.613 1.30 1.80100 35.0 37.96 38 78.613 0.12 37.07 39 44.330 4.61 1.84666 23.8 37.19 40 164.209 2.50 36.60 41 -130.313 1.30 1.64000 60.1 36.50 42 103.456 8.00 35.69 43 -446.160 2.45 1.80100 35.0 35.11 44 49.371 16.95 1.80518 25.4 35.00 45 -57.577 1.65 34.78 46 -39.653 1.80 1.77250 49.6 34.55 47 41.027 8.70 1.53172 48.8 35.72 48 -55.585 0.12 36.20 49 -242.138 3.16 1.56732 42.8 36.45 50 -91.852 8.51 36.69 51 -59.298 4.28 1.54814 45.8 36.36 52 -33.892 0.58 36.70 53 -100.095 9.19 2.00069 25.5 34.77 54 55.943 1.22 34.38 55 49.611 11.26 1.53172 48.8 35.58 56 -45.485 0.12 36.07 57 55.692 7.68 1.59551 39.2 34.16 58 -40.526 2.10 2.00069 25.5 33.59 59 -113.434 13.00 33.00 60 ∞ 33.00 1.60859 46.4 60.00 61 ∞ 13.20 1.51633 64.2 60.00 62∞13.25 60.00 Image plane ∞ Aspheric Data Page 13 K = 0.00000e+00 A 4= 1.71364e-07 A 6=-4.86825e-08 A 8=-8.88400e-10 A10=-2.96153e-12 A12=-4.72336e-15 A14= 2.75739e-18 A16= 1.70315e-21 A 3= 1.87120e-07 A 5= 1.38289e-07 A 7= 8.66794e-09 A 9= 5.88775e-11 A11= 1.33121e-13 A13= 6.57385e-17 A15=-1.34271e-19 Page 25 K = 0.00000e+00 A 4= 1.74550e-07 A 6=-4.97174e-10 A 8=-3.23403e-12 A10=-2.49644e-15 A12= 5.29486e-19 A14= 2.55506e-22 A16=-2.59288e-26 A 3=-5.72878e-07 A 5=-1.20232e-09 A 7= 5.78346e-11 A 9= 1.11014e-13 A11= 2.65894e-17 A13=-2.41331e-20 A15= 1.14297e-24 Page 31 K = 0.00000e+00 A 4=-1.48026e-07 A 6= 1.53986e-10 A 8=-2.35867e-12 A10=-1.18763e-15 A12= 4.70615e-19 A14=-1.15016e-22 A16=-2.67386e-26 A 3=-8.82590e-07 A 5=-9.69861e-09 A 7= 2.75235e-11 A 9= 8.16021e-14 A11=-5.17598e-18 A13=-4.78599e-21 A15= 3.49613e-24 Various data Zoom ratio 144.44 Wide Angle Mid-Telephoto Focal length 8.10 251.82 1169.94 F-number 1.76 1.77 6.08 Half angle of view 34.18 1.25 0.27 Image height 5.50 5.50 5.50 Lens total length 715.83 715.83 715.83 BF 13.25 13.25 13.25 d12 2.70 180.00 194.11 d23 301.19 73.33 1.50 d28 11.02 2.65 1.50 d35 2.98 61.91 120.78 d62 13.25 13.25 13.25 Entrance pupil position 128.50 2659.69 16159.86 Exit pupil position 508.91 508.91 508.91 Front principal point position 136.73 3039.45 20091.29 Back principal point position 5.15 -238.57 -1156.69 Zoom lens group data Group Starting plane Focal length Lens length Front principal point position Rear principal point position 1 1 248.34 122.09 69.94 -19.01 2 13 -22.50 37.58 4.34 -23.27 3 24 178.58 27.10 2.62 -15.49 4 29 125.39 35.38 9.48 -15.69 5 36 63.45 162.54 72.79 14.14

[0073] <Numerical Example 7> Unit: mm Surface Data Surface number rd nd vd Effective diameter 1 -2209.695 6.00 1.83481 42.7 218.26 2 341.889 1.50 205.58 3 339.919 24.40 1.43387 95.1 204.95 4 -889.124 0.20 203.62 5 559.308 14.37 1.43387 95.1 198.48 6 -1638.781 24.63 198.58 7 382.453 17.03 1.43387 95.1 198.80 8 -4097.047 0.25 198.38 9 294.905 18.08 1.43387 95.1 193.93 10 4765.116 1.60 192.91 11 191.673 15.16 1.43387 95.1 181.00 12 419.037 (variable) 179.59 13* -289.959 2.20 2.00330 28.3 45.81 14 37.660 10.53 38.99 15 -55.227 1.45 1.80610 40.9 38.11 16 45.332 6.03 1.89286 20.4 38.72 17 -840.505 (variable) 38.75 18 -526.771 5.06 1.89286 20.4 38.74 19 -49.365 3.33 38.78 20 -38.563 2.00 1.83481 42.7 36.79 21 -141.380 (variable) 39.10 22 120.942 10.34 1.78800 47.4 83.55 23* -694.900 2.79 83.45 24 121.227 16.19 1.43875 94.7 83.53 25 -150.560 0.48 82.90 26 179.392 2.50 1.85478 24.8 76.56 27 74.396 (variable) 72.46 28 90.094 13.43 1.49700 81.5 72.06 29 -300.995 2.60 1.84666 23.8 70.84 30 6830.305 0.20 69.83 31* 290.609 6.90 1.53775 74.7 69.12 32 -225.074 (variable) 68.34 33(Aperture) ∞ 3.22 35.10 34 -1087.040 1.40 1.88300 40.8 33.00 35 41.815 0.71 31.48 36 34.073 4.37 1.80810 22.8 31.61 37 95.174 4.66 30.90 38 -63.843 1.50 1.88300 40.8 30.14 39 -203.028 8.14 30.10 40 -128.165 1.50 1.89190 37.1 28.89 41 42.391 5.22 1.84666 23.8 29.02 42 -164.006 3.28 29.11 43 -44.925 1.50 1.88300 40.8 29.01 44 133.399 8.33 1.51742 52.4 30.34 45 -29.390 10.79 31.52 46 82.663 4.80 1.53172 48.8 31.35 47 -94.767 1.40 31.06 48 -89.200 1.50 1.89190 37.1 30.51 49 34.307 8.58 1.48749 70.2 30.24 50 -69.136 0.20 30.98 51 125.204 7.61 1.51633 64.1 31.30 52 -32.816 1.50 1.88300 40.8 31.26 53 -93.692 0.20 32.06 54 89.512 6.60 1.54814 45.8 32.25 55 -46.999 10.00 32.05 56 ∞ 33.00 1.60859 46.4 60.00 57 ∞ 13.20 1.51633 64.2 60.00 58∞ 13.00 60.00 Image plane ∞ Aspheric Data Page 13 K =-1.15600e+00 A 4= 2.06167e-06 A 6= 2.37163e-08 A 8= 7.71464e-10 A10= 2.13881e-12 A12=-3.64738e-15 A14=-4.78375e-18 A16=-3.39020e-22 A 3= 2.47197e-07 A 5=-3.95002e-08 A 7=-5.93337e-09 A 9=-5.68527e-11 A11=-4.22622e-15 A13= 1.87969e-16 A15= 6.37161e-20 Page 23 K =-1.99999e+00 A 4= 3.67612e-07 A 6= 2.05049e-10 A 8= 2.53553e-13 A10=-2.49940e-17 A12=-1.58306e-19 A14=-1.48454e-23 A16=-5.38308e-27 A 3=-1.09998e-07 A 5=-2.77004e-09 A 7=-9.40643e-12 A 9=-3.75874e-15 A11= 4.92123e-18 A13= 1.91359e-21 A15= 4.34738e-25 Page 31 K =-1.30139e+00 A 4= 1.82753e-07 A 6= 1.28586e-08 A 8= 5.44389e-11 A10=-6.62904e-15 A12= 3.45636e-18 A14= 3.39906e-20 A16= 1.94990e-24 A 3=-9.50776e-07 A 5=-8.91812e-08 A 7=-1.10762e-09 A 9=-1.24702e-12 A11= 8.66524e-16 A13=-1.18162e-18 A15=-4.17343e-22 Various data Zoom ratio 144.43 Wide Angle Mid-Telephoto Focal length 8.10 219.95 1169.92 F-number 1.76 1.76 6.08 Half angle of view 34.18 1.43 0.27 Image height 5.50 5.50 5.50 Lens total length 681.21 681.21 681.21 BF 13.00 13.00 13.00 d12 3.85 183.66 196.76 d17 0.99 1.95 2.02 d21 299.35 86.05 2.99 d27 8.67 3.73 6.93 d32 2.88 40.36 107.05 d58 13.00 13.00 13.00 Entrance pupil position 129.68 2617.63 17135.57 Exit pupil position 223.58 223.58 223.58 Front principal point position 138.09 3067.31 24805.18 Back principal point position 4.90 -206.95 -1156.92 Zoom lens group data Group starting plane Focal length Lens length Front principal point position Rear principal point position 1 1 250.77 123.22 71.35 -18.31 2 13 -21.98 20.21 3.53 -11.30 3 18 600.00 10.40 -22.01 -27.99 4 22 121.73 32.30 -6.44 -25.95 5 28 121.42 23.12 5.31 -10.16 6 33 46.53 143.21 60.30 19.95

[0074] [Table 1] [Explanation of symbols]

[0075] L1 First lens group L2 Second lens group L3: Third lens group L4 4th lens group L5 Fifth lens group SP aperture stop

Claims

1. A zoom lens having, in order from an object side to an image side, a first lens group having positive refractive power that does not move for zooming, at least one lens group having negative refractive power that moves toward the image side when zooming from a wide-angle end to a telephoto end, and at least two lens groups having positive refractive power that move toward the object side when zooming from the wide-angle end to the telephoto end, During zooming from the wide-angle end to the telephoto end, a lens group having the largest amount of movement among the at least one lens group having negative refractive power is designated as an N-th lens group, and a lens group having the largest amount of movement among the at least two lens groups having positive refractive power is designated as a P-th lens group, When the focal length of the first lens group is f1, the focal length of the zoom lens at the wide-angle end is fw, the focal length of the zoom lens at the telephoto end is ft, the difference between the optical axial distance from the N lens group to the image plane at the wide-angle end and the optical axial distance from the N lens group to the image plane at the telephoto end is mn, the difference between the optical axial distance from the P lens group to the image plane at the wide-angle end and the optical axial distance from the P lens group to the image plane at the telephoto end is mp, the lens group that moves toward the image side during zooming from the wide-angle end to the telephoto end is a V lens group, and the composite focal length of the V lens group at the wide-angle end is fvw, 4.35<ft / f1<6.00 1.0<|mn / mp|<2.0 0.02<fw / f1<0.05 -15.0<f1 / fvw≦-10.822 A zoom lens characterized by satisfying the following conditional expression.

2. When the composite lateral magnification of the V lens group at the wide-angle end is βvw and the composite lateral magnification of the V lens group at the telephoto end is βvt, 2.0<(βvt / βvw)2×(fw / ft)<5.0 2. The zoom lens according to claim 1, which satisfies the following condition:

3. the V lens group has a state in which a composite lateral magnification is −1x, When the lens group that moves toward the object side during zooming from the wide-angle end to the telephoto end is the C lens group, and the composite lateral magnification of the C lens group in a state in which the composite lateral magnification of the V lens group becomes −1 is βcfz, -1.00<βcfz<-0.65 3. The zoom lens according to claim 2, which satisfies the following condition:

4. the V lens group has a state in which a composite lateral magnification is −1x, 3. The zoom lens according to claim 2, wherein a lens group that moves toward the object side during zooming from the wide-angle end to the telephoto end is a C lens group, and a composite lateral magnification of the C lens group becomes -1x when a composite lateral magnification of the V lens group becomes -1x.

5. The C lens group is composed of a P1 lens group having positive refractive power and a P2 lens group having positive refractive power, and the distance on the optical axis between adjacent surfaces of the P1 lens group and the P2 lens group at the wide-angle end is dw, and the distance on the optical axis between adjacent surfaces of the P1 lens group and the P2 lens group at the telephoto end is dt, 0.1<dt / dw<2.0 4. The zoom lens according to claim 3, which satisfies the following condition:

6. When the lens group that moves toward the object side during zooming from the wide-angle end to the telephoto end is the C lens group, the composite focal length of the V lens group at the wide-angle end is fvw, and the composite focal length of the C lens group at the wide-angle end is fcw, -0.50<fvw / fcw<-0.15 6. The zoom lens according to claim 1, wherein the following condition is satisfied:

7. 7. The zoom lens according to claim 1, wherein the lens closest to the object side in the first lens group is a biconcave lens.

8. When the focal length of the biconcave lens is f1n and the d-line reference Abbe number of the biconcave lens is ν1n, -1.65<f1n / f1<-1.10 37<v1n<48 8. The zoom lens according to claim 7, which satisfies the following condition:

9. When the average of the d-line reference Abbe numbers of the positive lenses included in the first lens group is ν, 80<νpave<100 9. The zoom lens according to claim 1, wherein the following condition is satisfied:

10. 125<ft / fw<200 10. The zoom lens according to claim 1, wherein the following condition is satisfied:

11. 11. An imaging device comprising: the zoom lens according to claim 1; and an imaging element for capturing an image formed by the zoom lens.

Images