ZOOM LENS AND IMAGING APPARATUS
20180259754 ยท 2018-09-13
Assignee
Inventors
Cpc classification
G02B13/02
PHYSICS
G02B27/646
PHYSICS
International classification
G02B15/20
PHYSICS
G02B13/02
PHYSICS
G02B13/00
PHYSICS
Abstract
The zoom lens consisting of, in order from an object side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; a third lens group that has a negative refractive power; an intermediate part; and a final lens group that has a positive refractive power. The first lens group consists of three lenses, and has a cemented lens which is formed by cementing at least one positive lens and at least one negative lens. The second lens group consists of, in order from the object side, a negative meniscus lens, a biconcave lens, and a biconvex lens. The third lens group consists of one lens. The final lens group has a lens, which is convex toward an image side, at a position closest to the image side. Each lens group moves in a predetermined direction during zooming, and only the third lens group moves in the direction of the optical axis during focusing, and predetermined conditional expressions are satisfied.
Claims
1. A zoom lens consisting of, in order from an object side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; a third lens group that has a negative refractive power; an intermediate part that consists of one lens group or a plurality of lens groups; and a final lens group that has a positive refractive power, wherein the first lens group consists of three lenses, and has a cemented lens which is formed by cementing at least one positive lens and at least one negative lens, wherein the second lens group consists of, in order from the object side, a negative meniscus lens, a biconcave lens, and a biconvex lens, wherein the third lens group consists of one lens, wherein the final lens group has a lens, which is convex toward an image side, at a position closest to the image side, wherein during zooming from a wide-angle end to a telephoto end, a distance between the first lens group and the second lens group constantly increases, a distance between the second lens group and the third lens group changes, a distance between the third lens group and the intermediate part constantly decreases, and a distance between the intermediate part and the final lens group constantly increases, wherein during focusing, only the third lens group moves in a direction of an optical axis, and wherein assuming that a focal length of the first lens group is f1 and a focal length of the second lens group is f2, Conditional Expression (1) is satisfied.
3.5<f1/(f2)<5.5(1)
2. The zoom lens according to claim 1, wherein assuming that a focal length of the third lens group is f3, Conditional Expression (2) is satisfied.
1<f3/f2<3(2)
3. The zoom lens according to claim 1, wherein assuming that a total lens length at the wide-angle end is TTLw and a back focal length at the wide-angle end is Bfw, Conditional Expression (3) is satisfied.
4<TTLw/Bfw<7(3)
4. The zoom lens according to claim 1, wherein assuming that a focal length of the whole system during focusing on an object at infinity at the wide-angle end is fw and a focal length of the first lens group is f1, Conditional Expression (4) is satisfied.
0.18<fw/f1<0.3(4)
5. The zoom lens according to claim 1, wherein assuming that a focal length of the whole system during focusing on an object at infinity at the wide-angle end is fw, Conditional Expression (5) is satisfied.
0.5<fw/(f2)<1(5)
6. The zoom lens according to claim 1, wherein assuming that a distance on an optical axis between the second lens group and the third lens group at the wide-angle end is L23 and a focal length of the whole system during focusing on an object at infinity at the wide-angle end is fw, Conditional Expression (6) is satisfied.
0.4<L23/fw<1(6)
7. The zoom lens according to claim 1, wherein the intermediate part has a positive refractive power as a whole, and consists of, in order from the object side, a first positive intermediate part lens group that has a positive refractive power, a second negative intermediate part lens group that has a negative refractive power, and a third positive intermediate part lens group that has a positive refractive power, wherein during a vibration-proof operation, only the second negative intermediate part lens group moves in a direction perpendicular to the optical axis.
8. The zoom lens according to claim 1, wherein the intermediate part has a positive refractive power as a whole, and consists of, in order from the object side, a biconvex lens, a cemented lens that consists of a biconvex lens and a negative meniscus lens, a cemented lens that consists of a positive meniscus lens and a biconcave lens, a positive lens, and a negative meniscus lens, wherein during a vibration-proof operation, only some lenses of the intermediate part move in a direction perpendicular to the optical axis.
9. The zoom lens according to claim 8, wherein the cemented lens, which consists of the positive meniscus lens and the biconcave lens, has a negative refractive power as a whole, and wherein during a vibration-proof operation, only the cemented lens, which consists of the positive meniscus lens and the biconcave lens, moves in the direction perpendicular to the optical axis.
10. The zoom lens according to claim 1, wherein the intermediate part consists of only a fourth lens group which is one lens group.
11. The zoom lens according to claim 1, wherein the intermediate part consists of, in order from the object side, a fourth lens group and a fifth lens group by which a distance between the fifth lens group and the fourth lens group changes during zooming.
12. The zoom lens according to claim 1, wherein the first lens group has a negative meniscus lens, which is concave toward the image side, at a position closest to the object side.
13. The zoom lens according to claim 1, wherein the final lens group consists of one lens.
14. The zoom lens according to claim 1, wherein Conditional Expression (1-1) is satisfied.
4<f1/(f2)<5(1-1)
15. The zoom lens according to claim 2, wherein Conditional Expression (2-1) is satisfied.
1.5<f3/f2<2.5(2-1)
16. The zoom lens according to claim 3, wherein Conditional Expression (3-1) is satisfied.
5<TTLw/Bfw<6.5(3-1)
17. The zoom lens according to claim 4, wherein Conditional Expression (4-1) is satisfied.
0.18<fw/f1<0.28(4-1)
18. The zoom lens according to claim 5, wherein Conditional Expression (5-1) is satisfied.
0.6<fw/(f2)<0.9(5-1)
19. The zoom lens according to claim 6, wherein Conditional Expression (6-1) is satisfied.
0.5<L23/fw<0.8(6-1)
20. An imaging apparatus comprising the zoom lens according to claim 1.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0051] Hereinafter, embodiments of the present invention will be described with reference to drawings.
[0052] In
[0053] As shown in
[0054] In order to apply this zoom lens to an imaging apparatus, according to a configuration of the camera on which the lens is mounted, it is preferable that a cover glass, a prism, and various filters such as an infrared cutoff filter and a lowpass filter are disposed between the optical system and an image plane Sim. Therefore,
[0055] The first lens group G1 consists of three lenses, and has a cemented lens which is formed by cementing at least one positive lens and at least one negative lens. As described above, the positive refractive power is increased using all the positive lenses of the first lens group G1, and a cemented lens is formed by combining at least some of the positive lenses with a negative lens. Thereby, it is possible to suitably correct longitudinal chromatic aberration. In a case where the number of positive lenses is set to four or more, this setting is not preferable in that the thickness in the direction of the optical axis and the effective diameter are increased.
[0056] The second lens group G2 consists, in order from the object side, a negative meniscus lens, a biconcave lens, and a biconvex lens. The second lens group G2 has a major function of zooming. By setting the number of negative lenses in the second lens group G2 to two, there is an effect of suppressing occurrence of various aberrations, particularly, spherical aberration and distortion, generated by the negative lenses. In addition, a positive lens is disposed to be closest to the image side. Thereby, there is an effect of correcting overcorrected spherical aberration and longitudinal chromatic aberration, which are particularly likely to occur on the telephoto side.
[0057] In the configuration, the third lens group G3 consists of one lens, and only the third lens group G3 moves in a direction of an optical axis during focusing. As described above, the third lens group G3 is composed of one lens. Thereby, the third lens group G3, which is a focusing group, can be configured to be lightweight. As a result, this leads to an increase in speed of focusing. Further, although the effect of the increase in speed can be expected regardless of the autofocus method, in a case where wobbling is performed in a contrast autofocus mode, it is necessary to further reduce the weight of the focusing group. As a result, a high effect can be expected. Furthermore, by performing focusing through the third lens group G3 which is at a position where the on-axis marginal ray incident on the lens is gently inclined, there is an effect of suppressing fluctuation in spherical aberration due to the in-focus position.
[0058] The final lens group (the fifth lens group G5 in the present embodiment) has a positive refractive power as described above, and has a lens, which is convex toward an image side, at a position closest to the image side. As described above, by proving a positive refractive power to the final lens group, there is an advantage in minimizing an incident angle of rays on the image plane Sim at the wide-angle end, and suppressing distortion and lateral chromatic aberration at the telephoto end. In addition, the lens convex toward the image side is disposed to be closest to the image side, whereby there is an advantage in suppressing astigmatism.
[0059] In the configuration, during zooming from the wide-angle end to the telephoto end, a distance between the first lens group G1 and the second lens group G2 constantly increases, a distance between the second lens group G2 and the third lens group G3 changes, a distance between the third lens group G3 and the intermediate part IP constantly decreases, and a distance between the intermediate part IP and the final lens group constantly increases. With such a configuration, there is an advantage for high magnification.
[0060] In the configuration, assuming that a focal length of the first lens group G1 is f1 and a focal length of the second lens group G2 is f2, Conditional Expression (1) is satisfied. By not allowing the result of Conditional Expression (1) to be equal to or less than the lower limit, there is an effect of reducing the total length on the telephoto side. Further, by not allowing the power of the first lens group G1 to be equal to or less than the lower limit of Conditional Expression (1), it is possible to suppress occurrence of coma aberration. By not allowing the result of Conditional Expression (1) to be equal to or greater than the upper limit, there is an effect of achieving an increase in magnification. In addition, in a case where Conditional Expression (1-1) is satisfied, it is possible to obtain more favorable characteristics.
3.5<f1/(f2)<5.5(1)
4<f1/(f2)<5(1-1)
[0061] In the zoom lens of the present embodiment, assuming that a focal length of the third lens group G3 is f3 and a focal length of the second lens group G2 is f2, it is preferable that Conditional Expression (2) is satisfied. By not allowing the result of Conditional Expression (2) to be equal to or less than the lower limit, there is an effect of reducing the total length on the wide-angle side. By not allowing the result of Conditional Expression (2) to be equal to or greater than the upper limit, there is an effect of achieving an increase in magnification. In addition, in a case where Conditional Expression (2-1) is satisfied, it is possible to obtain more favorable characteristics.
1<f3/f2<3(2)
1.5<f3/f2<2.5(2-1)
[0062] Assuming that a total lens length at the wide-angle end is TTLw and a back focal length at the wide-angle end is Bfw, it is preferable that Conditional Expression (3) is satisfied. By not allowing the result of Conditional Expression (3) to be equal to or less than the lower limit, it is possible to minimize the incident angle of rays incident onto the image plane Sim. By not allowing the result of Conditional Expression (3) to be equal to or greater than the upper limit, there is an effect of reducing the total length on the wide-angle side. In addition, in a case where Conditional Expression (3-1) is satisfied, it is possible to obtain more favorable characteristics.
4<TTLw/Bfw<7(3)
5<TTLw/Bfw<6.5(3-1)
[0063] Assuming that a focal length of the whole system during focusing on an object at infinity at the wide-angle end is fw and a focal length of the first lens group G1 is f1, it is preferable that Conditional Expression (4) is satisfied. By not allowing the result of Conditional Expression (4) to be equal to or less than the lower limit, it is effective to suppress an increase in outer diameter of the lens. By not allowing the result of Conditional Expression (4) to be equal to or greater than the upper limit, there is an effect of reducing the total length on the wide-angle side. In addition, in a case where Conditional Expression (4-1) is satisfied, it is possible to obtain more favorable characteristics.
0.18<fw/f1<0.3(4)
0.18<fw/f1<0.28(4-1)
[0064] Assuming that a focal length of the whole system during focusing on an object at infinity at the wide-angle end is fw and a focal length of the second lens group G2 is f2, it is preferable that Conditional Expression (5) is satisfied. By not allowing the result of Conditional Expression (5) to be equal to or less than the lower limit, there is an effect of reducing the total length on the telephoto side. By not allowing the result of Conditional Expression (5) to be equal to or greater than the upper limit, there is an effect of reducing the total length on the wide-angle side. In addition, in a case where Conditional Expression (5-1) is satisfied, it is possible to obtain more favorable characteristics.
0.5<fw/(f2)<1(5)
0.6<fw/(f2)<0.9(5-1)
[0065] Assuming that a distance on an optical axis between the second lens group G2 and the third lens group G3 at the wide-angle end is L23 and a focal length of the whole system during focusing on an object at infinity at the wide-angle end is fw, it is preferable that Conditional Expression (6) is satisfied. By not allowing the result of Conditional Expression (6) to be equal to or less than the lower limit, there are effects of achieving a wide angle and for focusing. By not allowing the result of Conditional Expression (6) to be equal to or greater than the upper limit, there is an effect of achieving an increase in magnification while minimizing the total length. In addition, in a case where Conditional Expression (6-1) is satisfied, it is possible to obtain more favorable characteristics.
0.4<L23/fw<1(6)
0.5<L23/fw<0.8(6-1)
[0066] It is preferable that the intermediate part IP has a positive refractive power as a whole, and consists of, in order from the object side, a first positive intermediate part lens group IG1 that has a positive refractive power, a second negative intermediate part lens group IG2 that has a negative refractive power, and a third positive intermediate part lens group IG3 that has a positive refractive power. In addition, it is preferable that during a vibration-proof operation, only the second negative intermediate part lens group IG2 moves in a direction perpendicular to the optical axis Z. As described above, by adopting a configuration in which refractive powers in the intermediate part IP are set to be positive, negative, and positive refractive powers in order from the object side, it is possible to effectively improve a vibration-proof sensitivity while reducing the total length.
[0067] It is preferable that the intermediate part IP has a positive refractive power as a whole, and consists of, in order from the object side, a biconvex lens, a cemented lens that consists of a biconvex lens and a negative meniscus lens, a cemented lens that consists of a positive meniscus lens and a biconcave lens, a positive lens, and a negative meniscus lens. In addition, it is preferable that during a vibration-proof operation, only some lenses of the intermediate part IP moves in a direction perpendicular to the optical axis Z. With such a configuration, it becomes easy to suppress occurrence of astigmatism and distortion while reducing the total length.
[0068] In this case, it is preferable that the cemented lens, which consists of the positive meniscus lens and the biconcave lens, has a negative refractive power as a whole. In addition, it is preferable that during a vibration-proof operation, only the cemented lens, which consists of the positive meniscus lens and the biconcave lens, moves in the direction perpendicular to the optical axis Z. With such a configuration, it is possible to suppress chromatic aberration generated during the vibration-proof operation and suppress fluctuation in astigmatism.
[0069] In a similar manner to those of the configurations of Examples 1 to 4 shown in
[0070] In a similar manner to that of the configuration of Example 5 shown in
[0071] It is preferable that the first lens group G1 has a negative meniscus lens, which is concave toward the image side, at a position closest to the object side. With such a configuration, it is possible to prevent lateral chromatic aberration of the peripheral portion from being overcorrected on the wide-angle side.
[0072] It is preferable that the final lens group consists of one lens. With such a configuration, there is an advantage in reducing the total length of the lens.
[0073] It is preferable that the third lens group G3 consists of a double-sided aspheric lens. With such a configuration, it is possible to suppress fluctuations in spherical aberration and astigmatism during focusing.
[0074] In a case of using the zoom lens under severe environment, it is preferable to perform protective multilayer film coating. Not only the protective coating but also antireflective coating for reducing ghost light in use may be performed.
[0075] In the example shown in
[0076] Next, numerical examples of the zoom lens of the present invention will be described.
[0077] First, a zoom lens of Example 1 will be described.
[0078] In
[0079] The zoom lens of Example 1 consists of five lens groups as a whole. The first lens group G1 is composed of three lenses L1a to L1c, the second lens group G2 is composed of three lenses L2a to L2c, the third lens group G3 is composed of only one lens L3a, the fourth lens group G4 is composed of seven lenses L4a to L4g, and the fifth lens group G5 is composed of only one lens L5a. The fourth lens group G4 corresponds to the intermediate part IP, and the fifth lens group G5 corresponds to the final lens group.
[0080] Table 1 shows lens data of the zoom lens of Example 1, Table 2 shows data about specification, Table 3 shows surface distances which are variable during zooming, and Table 4 shows data about aspheric coefficients thereof. Hereinafter, meanings of the reference signs in the tables are, for example, as described in Example 1, and are basically the same as those in Examples 2 to 5.
[0081] In the lens data of Table 1, the column of the surface number shows surface numbers. The surface of the elements closest to the object side is the first surface, and the surface numbers sequentially increase toward the image side. The column of the radius of curvature shows radii of curvature of the respective surfaces. The column of the on-axis surface distance shows spacings on the optical axis Z between the respective surfaces and the subsequent surfaces. Further, the column of n shows a refractive index of each optical element at the d line (a wavelength of 587.6 nm (nanometers)), and the column of d shows an Abbe number of each optical element at the d line (a wavelength of 587.6 nm (nanometers)). Here, the sign of the radius of curvature is positive in a case where a surface has a shape convex toward the object side, and is negative in a case where a surface has a shape convex toward the image side. The lens data additionally shows the optical members PP1 and PP2. Further, in the lens data, in each place of the surface distance which is variable during focusing, DD[surface number] is noted. Numerical values each corresponding to the DD[surface number] are shown in Table 3.
[0082] The data about specification of Table 2 shows values of the zoom ratio at each of the wide-angle end (WIDE), the middle position (MIDDLE), and the telephoto end (TELE), the focal length f of the whole system, the back focal length Bf, the F number FNo, and the total angle of view 2.
[0083] In the lens data of Table 1, the reference sign * is attached to surface numbers of aspheric surfaces, and radii of curvature of the aspheric surfaces are represented by numerical values of paraxial radii of curvature. The data about aspheric coefficients of Table 4 shows the surface numbers of the aspheric surfaces and aspheric coefficients of the aspheric surfaces. The En (n: an integer) in numerical values of the aspheric coefficients of Table 4 indicates 10.sup.n. The aspheric coefficients are values of the coefficients KA and Am (m=3 . . . 20) in aspheric surface expression represented as the following expression.
Zd=C.Math.h.sup.2/{1+(1KA.Math.C.sup.2h.sup.2).sup.1/2}Am.Math.h.sup.m
[0084] Here, Zd is an aspheric surface depth (a length of a perpendicular from a point on an aspheric surface at height h to a plane that is perpendicular to the optical axis and contacts with the vertex of the aspheric surface),
[0085] h is a height (a distance from the optical axis),
[0086] C is an inverse of a paraxial radius of curvature, and
[0087] KA and Am are aspheric coefficients.
[0088] In the basic lens data, the data about specification, the data about surface distances variable during zooming, and the data about aspheric coefficients, a degree is used as a unit of an angle, and mm is used as a unit of a length, but appropriate different units may be used since the optical system can be used even in a case where the system is enlarged or reduced in proportion.
TABLE-US-00001 TABLE 1 Example 1Lens Data (n and at d Line) Surface Radius of Surface Number Curvature Distance n 1 98.90193 1.599 1.85896 22.73 2 58.57248 8.683 1.72916 54.68 3 329.36885 0.335 4 60.24169 5.933 1.72916 54.68 5 159.25126 DD[5] *6 172.14995 0.699 1.85135 40.10 *7 11.64587 6.773 8 41.28183 0.569 1.88300 40.76 9 123.35740 0.249 10 29.03790 4.456 1.95906 17.47 11 260.74776 DD[11] *12 94.43661 1.043 1.74330 49.33 *13 23.92253 DD[13] *14 16.91660 5.237 1.62263 58.16 *15 35.64431 0.912 16(Stop) 2.800 17 27.34956 4.885 1.59522 67.73 18 16.29082 1.197 1.92286 18.90 19 43.17081 2.018 20 300.83907 2.017 1.95906 17.47 21 44.25518 0.461 1.76200 40.10 22 21.42676 1.998 *23 85.23245 3.847 1.58313 59.46 *24 28.08240 3.218 25 18.53438 1.032 1.62588 35.70 26 81.42896 DD[26] 27 146.62840 3.889 2.00100 29.13 28 38.46534 10.721 29 2.150 1.54763 54.98 30 1.310 31 0.700 1.49784 54.98 32 1.133
TABLE-US-00002 TABLE 2 Example 1Specification (d Line) WIDE MIDDLE TELE Zoom Ratio 1.0 2.5 4.7 f 16.500 41.006 77.765 Bf 15.020 15.020 15.020 FNo. 4.10 4.11 4.04 2[] 84.8 36.2 20.0
TABLE-US-00003 TABLE 3 Example 1Variable Surface Distance WIDE MIDDLE TELE DD[5] 0.461 21.998 36.308 DD[11] 10.200 3.714 4.521 DD[13] 5.328 3.090 0.430 DD[26] 0.977 15.317 25.877
TABLE-US-00004 TABLE 4 Example 1Aspheric Coefficient Surface Number 6 7 12 13 KA 2.0083118E+00 1.5654139E01 4.0909552E+00 3.8316650E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.5534894E05 1.2539044E04 5.7299348E04 6.2798527E04 A5 9.2883707E06 5.5935617E06 1.9418574E05 2.0359555E05 A6 2.5084410E07 1.8957970E07 6.4259934E06 7.9346811E06 A7 5.1622741E09 2.9378459E08 6.5113528E08 2.3939865E07 A8 7.5383371E10 2.1930672E08 9.2857710E08 7.4198994E08 A9 8.4480514E11 3.5897295E09 6.0924589E11 1.4889904E09 A10 7.4006341E13 3.2995545E11 1.8855007E10 3.4593708E10 A11 3.3199491E13 4.3570820E11 4.0657130E11 5.8011800E11 A12 6.5592361E15 5.1863363E12 3.7336016E12 2.4286150E12 A13 2.2566788E15 2.3237787E13 4.6576096E14 2.2544369E13 A14 6.5269643E17 1.5323283E15 2.1328413E14 4.5386293E14 A15 6.3328072E19 2.8644765E16 7.0949674E15 5.6234638E15 A16 1.4845297E19 1.6022999E17 1.4893999E15 3.6145225E16 A17 1.1948366E20 1.4576507E17 5.7838906E17 5.6059735E17 A18 2.8952807E22 2.8921148E18 2.3334582E17 8.7024018E18 A19 4.3801531E23 1.3019831E19 9.4470253E19 8.0092894E19 A20 2.4096667E24 3.5764463E22 2.1120875E19 1.2979624E19 Surface Number 14 15 23 24 KA 2.8531901E01 2.3397215E+00 2.4891915E+00 5.0000090E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 4.3222454E06 4.1449022E05 5.0753708E05 2.4483850E05 A5 2.5774397E06 2.8794700E06 2.6883165E06 4.7876500E06 A6 6.2823424E07 7.6708317E07 2.8641475E06 1.3574474E06 A7 1.2369614E07 6.0347324E08 5.8946486E07 2.6325204E07 A8 4.8451718E09 5.3856253E09 1.1244435E07 2.4245966E08 A9 4.5112054E10 1.6817166E09 6.1055764E09 7.9348495E09 A10 4.0880800E11 3.9798962E11 7.7872655E10 4.7738589E11 A11 1.0523647E11 1.9242162E11 2.8950436E11 8.6054348E11 A12 6.0742044E14 1.3337315E12 2.7579738E11 1.1580113E11 A13 6.3674841E14 5.1476939E14 2.9501867E12 2.2744276E12 A14 2.8835118E14 8.7516777E15 2.9572046E13 3.3570612E14 A15 3.9742353E15 4.5703720E15 3.5609351E14 4.1708202E14 A16 2.0057640E16 5.6621862E16 7.0113998E15 5.6683642E15 A17 5.5456052E18 5.6218441E18 2.5010820E16 5.8758790E16 A18 3.2840782E18 3.7822516E18 2.2025883E16 6.8968309E17 A19 3.6522812E19 3.2752419E19 2.2480346E17 2.1370945E17 A20 7.2289011E21 2.0436631E20 6.4230613E18 2.1609930E18
[0089]
[0090] The aberration diagrams illustrating spherical aberration, astigmatism, and distortion indicate aberrations that occur in a case where the d line (a wavelength of 587.6 nm (nanometers)) is set as a reference wavelength. In the spherical aberration diagram, aberrations at the d line (a wavelength of 587.6 nm (nanometers)), the C line (a wavelength of 656.3 nm (nanometers)), and the F line (a wavelength of 486.1 nm (nanometers)) are respectively indicated by the solid line, the long dashed line, and the short dashed line. In the astigmatism diagram, aberrations in sagittal and tangential directions are respectively indicated by the solid line and the short dashed line. In the lateral chromatic aberration, aberrations at the C line (a wavelength of 656.3 nm (nanometers)) and F line (a wavelength of 486.1 nm (nanometers)) are respectively indicated by the long dashed line and the short dashed line. In the spherical aberration diagram, FNo. means an F number. In the other aberration diagrams, w means a half angle of view.
[0091]
[0092] In the description of Example 1, reference signs, meanings, and description methods of the respective data pieces are the same as those in the following examples unless otherwise noted. Therefore, in the following description, repeated description will be omitted.
[0093] Next, a zoom lens of Example 2 will be described.
TABLE-US-00005 TABLE 5 Example 2Lens Data (n and at d Line) Surface Radius of Surface Number Curvature Distance n 1 97.13652 1.589 1.85896 22.73 2 53.80591 8.968 1.72916 54.68 3 244.91302 0.326 4 60.37398 5.974 1.81464 46.54 5 164.62029 DD[5] *6 179.92179 0.799 1.85135 40.10 *7 11.60839 6.873 8 36.68898 0.714 1.88300 40.76 9 361.09159 0.234 10 32.48755 4.251 1.95906 17.47 11 169.77260 DD[11] *12 107.33744 1.055 1.74330 49.33 *13 24.13566 DD[13] *14 16.74813 5.264 1.62263 58.16 *15 36.13258 0.821 16(Stop) 2.800 17 27.18067 4.873 1.59522 67.73 18 16.32740 0.636 1.92286 18.90 19 44.41501 1.980 20 208.22372 2.050 1.95906 17.47 21 39.90988 0.713 1.76200 40.10 22 22.36812 1.998 *23 88.57659 3.209 1.58313 59.46 *24 28.42502 3.115 25 16.04242 2.477 1.57840 40.30 26 59.79531 DD[26] 27 2709.47010 3.481 1.88775 39.23 28 44.59036 10.684 29 2.150 1.54763 54.98 30 1.310 31 0.700 1.49784 54.98 32 1.135
TABLE-US-00006 TABLE 6 Example 2Specification (d Line) WIDE MIDDLE TELE Zoom Ratio 1.0 2.5 4.7 f 16.500 41.006 77.766 Bf 14.985 14.985 14.985 FNo. 4.10 4.11 4.04 2[] 85.0 36.2 20.0
TABLE-US-00007 TABLE 7 Example 2Variable Surface Distance WIDE MIDDLE TELE DD[5] 0.443 21.765 35.591 DD[11] 9.991 3.763 4.479 DD[13] 5.396 3.072 0.445 DD[26] 0.983 15.844 26.976
TABLE-US-00008 TABLE 8 Example 2Aspheric Coefficient Surface Number 6 7 12 13 KA 4.3229241E+00 1.2976002E01 2.6529883E+00 3.9900188E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.7550727E05 1.2528040E04 5.7779094E04 6.3089944E04 A5 9.2533072E06 5.0934588E06 1.9849023E05 2.0274390E05 A6 2.5256423E07 2.0061886E07 6.4043200E06 7.9796423E06 A7 4.9384505E09 1.9195236E08 3.7282497E08 2.5327161E07 A8 7.3011539E10 2.3124845E08 8.7914464E08 7.3661669E08 A9 8.4845035E11 3.5961980E09 1.1066457E12 1.3757677E09 A10 7.3762995E13 3.1573377E11 1.9331963E10 3.5664120E10 A11 3.3170953E13 4.3250021E11 3.9564522E11 5.8080120E11 A12 6.7204285E15 5.2012173E12 3.3728684E12 2.3354975E12 A13 2.2365999E15 2.3841617E13 6.0134925E14 2.5265167E13 A14 6.6111688E17 1.5647479E15 1.9939214E14 4.5567338E14 A15 6.0538213E19 2.7907429E16 7.0304904E15 5.7405417E15 A16 1.4876276E19 1.7472929E17 1.5455879E15 3.3556249E16 A17 1.2015456E20 1.4239894E17 6.1241140E17 5.6161880E17 A18 3.4474889E22 2.8503806E18 2.3635195E17 8.9924291E18 A19 4.5315286E23 1.2886851E19 9.8870946E19 8.0872066E19 A20 2.3774436E24 3.8939313E22 2.1678024E19 1.3296534E19 Surface Number 14 15 23 24 KA 1.9436869E01 1.0952265E+00 5.0000088E+00 5.0000054E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.8588153E06 3.9685502E05 3.7541666E05 8.7801690E06 A5 1.6792251E06 3.1309309E06 5.7260604E06 6.0505629E06 A6 5.8443310E07 7.8106003E07 3.6048247E06 1.6900798E06 A7 1.2972603E07 5.5802478E08 6.3582772E07 2.8919028E07 A8 5.2672711E09 6.5517697E09 1.0451989E07 2.6754285E08 A9 5.0786013E10 1.7404813E09 6.1220687E09 7.9667492E09 A10 4.0749763E11 4.3660392E11 5.9628775E10 6.6697833E11 A11 1.0386794E11 1.9092351E11 4.7862189E11 8.3333447E11 A12 6.5630717E15 1.1935800E12 3.0995852E11 1.0371763E11 A13 5.9911585E14 5.6738802E14 2.2950849E12 1.6010670E12 A14 2.5718305E14 6.4782670E15 3.2322436E13 6.2700623E14 A15 3.9028504E15 4.5027834E15 1.5009711E13 3.6504276E14 A16 2.0578067E16 5.7174237E16 6.3528923E15 6.3517749E15 A17 5.2042266E18 7.1984735E18 1.9227931E15 6.2464889E16 A18 3.4511211E18 4.0442353E18 9.2519242E17 9.7910245E17 A19 3.6749122E19 3.4068440E19 3.8106195E17 2.2378569E17 A20 6.5787211E21 1.9527554E20 4.7470164E18 2.4348194E18
[0094] Next, a zoom lens of Example 3 will be described.
TABLE-US-00009 TABLE 9 Example 3Lens Data (n and at d Line) Surface Radius of Surface Number Curvature Distance n 1 126.32067 1.625 1.85896 22.73 2 62.44734 8.698 1.72916 54.68 3 605.74875 0.634 4 62.45092 5.599 1.78800 47.37 5 176.97000 DD[5] *6 142.52356 0.998 1.85135 40.10 *7 12.25326 6.856 8 37.71493 0.840 1.88300 40.76 9 258.54743 0.350 10 30.86521 3.306 1.95906 17.47 11 259.24062 DD[11] *12 68.64488 0.902 1.74330 49.33 *13 42.72399 DD[13] *14 16.83750 5.883 1.62263 58.16 *15 32.87176 0.999 16(Stop) 2.800 17 23.70008 5.332 1.59522 67.73 18 15.75531 0.984 1.92286 18.90 19 41.63743 2.065 20 283.88368 2.100 1.95906 17.47 21 41.77644 0.760 1.76200 40.10 22 21.12874 1.998 *23 397.45950 2.186 1.58313 59.46 *24 24.17255 2.471 25 16.79569 1.131 1.63930 44.87 26 43.94006 DD[26] 27 75.37021 3.790 1.85545 36.60 28 30.85920 10.740 29 2.150 1.54763 54.98 30 1.310 31 0.700 1.49784 54.98 32 1.136
TABLE-US-00010 TABLE 10 Example 3Specification (d Line) WIDE MIDDLE TELE Zoom Ratio 1.0 2.5 4.7 f 16.502 41.011 77.774 Bf 15.042 15.042 15.042 FNo. 4.10 4.10 4.04 2[] 86.0 36.0 20.2
TABLE-US-00011 TABLE 11 Example 3Variable Surface Distance WIDE MIDDLE TELE DD[5] 0.377 22.589 35.918 DD[11] 10.399 4.318 4.394 DD[13] 5.402 2.855 0.500 DD[26] 1.000 14.561 26.643
TABLE-US-00012 TABLE 12 Example 3Aspheric Coefficient Surface Number 6 7 12 13 KA 4.6979493E+00 4.2788143E02 4.9710240E+00 4.9907493E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.6064750E05 1.3391504E04 4.1065360E04 4.2327888E04 A5 8.7593788E06 3.8992272E06 2.3445393E05 2.3683883E05 A6 2.0991160E07 3.3100258E07 5.9814555E06 6.5807494E06 A7 3.7888299E09 1.2557411E08 2.6476977E07 3.8875199E07 A8 1.1025562E09 2.4691201E08 6.4410073E08 5.7054286E08 A9 1.0484630E10 3.5609949E09 1.0060353E09 1.3189084E09 A10 9.6846570E13 3.9206552E11 4.4304390E11 3.8978103E10 A11 3.4625600E13 4.2637526E11 4.3357594E11 3.6525693E11 A12 7.7960208E15 5.2867373E12 1.2193627E12 7.1611072E12 A13 2.2479288E15 2.3328759E13 6.7350004E13 3.4395237E13 A14 7.5943702E17 1.7787489E15 6.0660665E14 7.3895840E14 A15 5.2151841E19 3.1908008E16 6.2924297E15 1.5390877E14 A16 1.6110915E19 4.9351280E18 9.3615761E15 1.5759736E15 A17 9.6728920E21 1.4391340E17 5.9376991E16 3.3006897E17 A18 4.7826089E22 3.0289066E18 3.5862958E17 1.3213087E17 A19 6.0007006E23 1.4130318E19 1.0329786E18 2.5194651E19 A20 2.4650259E24 9.4161827E23 3.4156060E19 6.6100457E20 Surface Number 14 15 23 24 KA 6.4690592E01 2.5824448E+00 4.9790084E+00 4.9985687E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.1912579E05 2.9989087E05 4.4924634E05 3.7843289E05 A5 2.4243028E06 3.0130672E06 6.7585109E06 8.2534165E06 A6 7.2289754E07 7.7393493E07 1.4819817E07 2.6126962E06 A7 1.4571920E07 7.0807881E08 1.1439703E07 5.4008836E07 A8 3.1319741E09 4.5753743E09 8.9532187E08 1.7932413E08 A9 1.1988187E09 1.7435848E09 6.3953964E09 1.1081769E08 A10 1.1576661E11 3.4373659E11 3.4568536E10 6.3587177E10 A11 1.2044858E11 2.0701220E11 1.5370344E10 2.5442576E10 A12 6.0451698E13 1.7585962E12 1.8188000E11 5.7902007E11 A13 1.9664507E14 4.6384665E14 8.0857974E12 2.3670126E12 A14 2.6728975E14 7.4999688E15 2.2277297E12 4.4296390E13 A15 3.7611701E15 4.6175918E15 2.9797590E13 7.8862771E14 A16 2.1812638E16 5.6267543E16 1.4438387E14 1.9738994E14 A17 1.1566551E17 1.1941218E17 2.7077468E14 1.2745841E15 A18 2.4378050E18 3.0925946E18 4.0774605E15 6.9035185E16 A19 2.2792787E19 4.5107726E19 5.2216894E16 1.3597856E16 A20 4.9068793E21 2.3531059E20 7.9384687E17 7.1661559E18
[0095] Next, a zoom lens of Example 4 will be described.
TABLE-US-00013 TABLE 13 Example 4Lens Data (n and at d Line) Surface Radius of Surface Number Curvature Distance n 1 127.65215 1.625 1.85896 22.73 2 62.93823 8.727 1.72916 54.68 3 663.41139 0.406 4 62.65500 5.582 1.78800 47.37 5 177.43645 DD[5] *6 174.49703 0.880 1.85135 40.10 *7 12.26380 6.793 8 38.52917 0.780 1.88300 40.76 9 272.12189 0.271 10 30.32679 3.855 1.95906 17.47 11 291.32578 DD[11] *12 73.19399 0.909 1.74330 49.33 *13 41.42909 DD[13] *14 16.95382 5.891 1.62263 58.16 *15 32.14735 0.997 16(Stop) 2.800 17 23.99578 5.284 1.59522 67.73 18 15.88431 1.031 1.92286 18.90 19 41.43676 2.061 20 270.82021 2.394 1.95906 17.47 21 41.48242 0.760 1.76200 40.10 22 21.03523 1.998 *23 420.06426 2.272 1.58313 59.46 *24 24.36365 2.423 25 16.87761 0.750 1.63930 44.87 26 45.50435 DD[26] *27 77.81568 3.656 1.85545 36.60 28 30.73888 10.740 29 2.150 1.54763 54.98 30 1.310 31 0.700 1.49784 54.98 32 1.137
TABLE-US-00014 TABLE 14 Example 4Specification (d Line) WIDE MIDDLE TELE Zoom Ratio 1.0 2.5 4.7 f 16.502 41.011 77.774 Bf 15.043 15.043 15.043 FNo. 4.10 4.10 4.06 2[] 86.8 36.0 20.2
TABLE-US-00015 TABLE 15 Example 4Variable Surface Distance WIDE MIDDLE TELE DD[5] 0.375 22.820 35.967 DD[11] 9.972 4.197 4.379 DD[13] 5.397 2.860 0.500 DD[26] 1.053 14.603 26.996
TABLE-US-00016 TABLE 16 Example 4Aspheric Coefficient Surface Number 6 7 12 13 KA 4.9807145E+00 4.4290822E02 4.4583013E+00 4.9201896E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.6164035E05 1.3286098E04 4.1120863E04 4.2672794E04 A5 8.7721018E06 3.7702682E06 2.3490180E05 2.3967381E05 A6 2.0956878E07 3.2625608E07 6.0250518E06 6.6018556E06 A7 3.7781111E09 1.1780675E08 2.6096197E07 3.9359259E07 A8 1.0980496E09 2.4647301E08 6.7022870E08 5.6549881E08 A9 1.0511846E10 3.5638524E09 1.1956612E09 1.3389103E09 A10 9.5854967E13 3.8965896E11 1.1148198E11 4.0512087E10 A11 3.4663362E13 4.2637223E11 4.5884904E11 3.7458865E11 A12 7.8212317E15 5.2891911E12 1.0410964E12 5.6496430E12 A13 2.2507751E15 2.3331205E13 8.1534329E13 2.4004981E13 A14 7.6345452E17 1.7915014E15 8.0577502E14 6.1787291E14 A15 5.4615288E19 3.1815047E16 5.6695794E15 1.4597836E14 A16 1.5977448E19 4.9903380E18 9.7788293E15 1.2097149E15 A17 9.7239702E21 1.4364516E17 6.0668482E16 1.6001319E17 A18 4.7713072E22 3.0340986E18 3.9480484E17 1.1904580E17 A19 5.9661280E23 1.4209151E19 1.1673167E18 1.2466559E19 A20 2.5066115E24 1.2214035E22 3.7561139E19 8.9349546E20 Surface Number 14 15 23 24 KA 6.6489308E01 2.3646955E+00 4.3050573E+00 4.8340114E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 9.3860044E06 2.8525632E05 4.7103879E05 3.7106354E05 A5 2.3606663E06 3.1522393E06 6.2174344E06 7.8801678E06 A6 7.1240465E07 7.8925168E07 3.4667231E07 2.5052217E06 A7 1.4564986E07 7.1435556E08 1.3981090E07 5.3636374E07 A8 2.4984537E09 4.9129808E09 8.7718593E08 1.7367837E08 A9 1.4385123E09 1.7136681E09 5.9432616E09 1.1159720E08 A10 3.9491818E13 3.5399290E11 3.6033632E10 6.2018411E10 A11 1.3327581E11 1.9649072E11 1.5055756E10 2.5276096E10 A12 6.2758723E13 1.8239007E12 1.2009641E11 5.6235357E11 A13 5.3038388E14 8.1766216E14 7.3480761E12 2.2970468E12 A14 2.5013432E14 5.5017106E15 2.0069955E12 4.3505019E13 A15 3.9212783E15 4.8394793E15 3.0628984E13 7.7951201E14 A16 2.0702163E16 5.6612542E16 2.2486690E14 1.9733451E14 A17 1.2430851E17 9.6361364E18 2.3832367E14 1.2274615E15 A18 3.1605364E18 3.2396177E18 4.1363022E15 6.8160896E16 A19 2.4592521E19 5.0273649E19 4.9765125E16 1.3535652E16 A20 2.8220143E21 2.7443141E20 8.1731203E17 7.0997217E18 Surface Number 27 KA 8.8986050E01 A4 6.0288683E07 A6 9.2994823E10 A8 4.8402485E12 A10 1.3117909E14
[0096] Next, a zoom lens of Example 5 will be described.
[0097] Table 17 shows lens data of the zoom lens of Example 5, Table 18 shows data about specification, Table 19 shows surface distances which are variable during zooming, and Table 20 shows data about aspheric coefficients thereof.
TABLE-US-00017 TABLE 17 Example 5Lens Data (n and at d Line) Surface Radius of Surface Number Curvature Distance n 1 125.84028 2.218 1.85896 22.73 2 63.33073 8.802 1.72916 54.68 3 565.15955 0.696 4 62.33278 5.726 1.78800 47.37 5 176.18104 DD[5] *6 147.78713 1.156 1.85135 40.10 *7 12.23006 6.861 8 37.62172 0.994 1.88300 40.76 9 252.02377 0.433 10 31.23952 3.235 1.95906 17.47 11 247.79672 DD[11] *12 69.22427 0.897 1.74330 49.33 *13 42.79348 DD[13] *14 16.78835 6.024 1.62263 58.16 *15 32.91411 1.000 16(Stop) 2.800 17 23.60710 5.324 1.59522 67.73 18 15.83007 1.219 1.92286 18.90 19 41.35888 2.064 20 275.40556 2.335 1.95906 17.47 21 41.58785 0.760 1.76200 40.10 22 21.04996 1.998 *23 442.79077 2.501 1.58313 59.46 *24 24.12246 DD[24] 25 16.83116 0.807 1.63930 44.87 26 43.52990 DD[26] 27 72.69367 3.794 1.85545 36.60 28 30.99803 12.058 29 2.150 1.54763 54.98 30 1.310 31 0.700 1.49784 54.98 32 1.139
TABLE-US-00018 TABLE 18 Example 5Specification (d Line) WIDE MIDDLE TELE Zoom Ratio 1.0 2.5 4.7 f 16.499 41.003 77.758 Bf 16.363 16.363 16.363 FNo. 4.10 4.10 4.06 2[] 85.4 35.8 20.0
TABLE-US-00019 TABLE 19 Example 5Variable Surface Distance WIDE MIDDLE TELE DD[5] 0.375 22.536 35.791 DD[11] 10.276 4.085 4.465 DD[13] 5.426 2.918 0.506 DD[24] 0.822 0.690 0.600 DD[26] 1.315 15.678 28.805
TABLE-US-00020 TABLE 20 Example 5Aspheric Coefficient Surface Number 6 7 12 13 KA 4.7407355E+00 4.2478293E02 4.8892222E+00 4.9796053E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 7.6063356E05 1.3388766E04 4.1094288E04 4.2345418E04 A5 8.7574601E06 3.9352370E06 2.3416258E05 2.3630000E05 A6 2.1008206E07 3.3557227E07 5.9768415E06 6.5683837E06 A7 3.7947164E09 1.1844350E08 2.6637092E07 3.8911575E07 A8 1.1037648E09 2.4656160E08 6.3757233E08 5.6431719E08 A9 1.0470101E10 3.5629587E09 9.6215681E10 1.3488382E09 A10 9.6524991E13 3.9174511E11 5.2338963E11 3.8292302E10 A11 3.4635859E13 4.2644816E11 4.3497557E11 3.6111599E11 A12 7.7956430E15 5.2833600E12 1.4934795E12 7.3994285E12 A13 2.2479307E15 2.3350085E13 6.5191455E13 3.5663479E13 A14 7.5946177E17 1.7567272E15 5.8584181E14 7.4169445E14 A15 5.2271073E19 3.2084888E16 6.0910093E15 1.5279830E14 A16 1.6095205E19 4.7846917E18 9.2813420E15 1.5616580E15 A17 9.6860920E21 1.4394862E17 5.9430355E16 3.5575762E17 A18 4.7758223E22 3.0285594E18 3.5215147E17 1.3659792E17 A19 5.9928514E23 1.4127610E19 1.0205890E18 2.8631839E19 A20 2.4788905E24 9.7949097E23 3.3806082E19 6.3836667E20 Surface Number 14 15 23 24 KA 6.4766979E01 2.5679056E+00 4.9571827E+00 4.9978175E+00 A3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 A4 1.2717961E05 2.8773753E05 4.7699000E05 3.6242662E05 A5 2.4082403E06 2.9983767E06 6.8705676E06 8.1085871E06 A6 7.2780838E07 7.7349992E07 1.9480638E07 2.6291956E06 A7 1.4482219E07 7.1347864E08 1.1125002E07 5.4025555E07 A8 3.3322622E09 4.4643707E09 8.9594651E08 1.8088683E08 A9 1.1498503E09 1.7315190E09 6.2081329E09 1.0978712E08 A10 1.3421110E11 3.6710191E11 3.3612729E10 6.3480583E10 A11 1.1874388E11 2.0827748E11 1.5288657E10 2.5427471E10 A12 6.3335113E13 1.7731674E12 1.8326919E11 5.8081104E11 A13 1.5349191E14 3.2158046E14 8.1003856E12 2.3378928E12 A14 2.7087970E14 7.9320914E15 2.2338393E12 4.3865166E13 A15 3.7256183E15 4.5986332E15 3.0252193E13 7.8030351E14 A16 2.2042437E16 5.6286412E16 1.4024912E14 1.9882625E14 A17 1.1530944E17 1.0558940E17 2.7078402E14 1.2678032E15 A18 2.3585493E18 3.1025846E18 4.0615262E15 6.8949222E16 A19 2.2512974E19 4.4775535E19 5.2289418E16 1.3621247E16 A20 5.0431697E21 2.4009490E20 7.9068623E17 7.0692026E18
[0098] Table 21 shows values corresponding to Conditional Expressions (1) to (6) of the zoom lenses of Examples 1 to 5. It should be noted that, in the above-mentioned examples, the d line is set as the reference wavelength, and the values shown in the following Table 21 are values at the reference wavelength.
TABLE-US-00021 TABLE 21 Expression Conditional Number Expression Example 1 Example 2 Example 3 Example 4 Example 5 (1) f1/(f2) 4.53 4.37 4.17 4.18 4.21 (2) f3/f2 2.31 2.21 1.72 1.73 1.73 (3) TTLw/Bfw 6.46 6.48 6.36 6.32 5.88 (4) fw/f1 0.20 0.20 0.19 0.19 0.19 (5) Fw/(f2) 0.88 0.87 0.81 0.81 0.81 (6) L23/fw 0.62 0.61 0.63 0.60 0.62
[0099] As can be seen from the above-mentioned data, all the zoom lenses of Example 1 to 5 satisfy Conditional Expressions (1) to (6), and are zoom lenses each of which has a high magnification of 4 or more times and has a short total length.
[0100] Next, an embodiment of the imaging apparatus according to the present invention will be described with reference to
[0101] The camera 30 comprises a camera body 31, and a shutter button 32 and a power button 33 are provided on an upper surface thereof. Further, operation sections 34 and 35 and a display section 36 are provided on a rear surface of the camera body 31. The display section 36 is for displaying a captured image and an image within an angle of view before imaging.
[0102] An imaging aperture, through which light from an imaging target is incident, is provided at the center on the front surface of the camera body 31. A mount 37 is provided at a position corresponding to the imaging aperture. The interchangeable lens 20 is mounted on the camera body 31 with the mount 37 interposed therebetween.
[0103] In the camera body 31, there are provided an imaging element (not shown in the drawing), a signal processing circuit, a recording medium, and the like. The imaging element such as a charge coupled device (CCD) receives a subject image which is formed through the interchangeable lens 20, and outputs a captured image signal based on the subject image. The signal processing circuit generates an image through processing of the captured image signal which is output from the imaging element. The recording medium records the generated image. The camera 30 is able to capture a still image or a moving image by pressing the shutter button 32, and is able to store image data, which is obtained through imaging, in the storage medium.
[0104] The present invention has been hitherto described through embodiments and examples, but the present invention is not limited to the above-mentioned embodiments and examples, and may be modified into various forms. For example, values such as the radius of curvature, the surface distance, the refractive index, and the Abbe number of each lens component are not limited to the values shown in the examples, and different values may be used therefor.
[0105] In the embodiment of the imaging apparatus, the non-reflex type digital camera is taken as an example and described with the drawings. However, the imaging apparatus of the present invention is not limited to this. For example, the present invention may be applied to imaging apparatuses such as video cameras, digital cameras which are not the non-reflex type, movie imaging cameras, broadcast cameras.
EXPLANATION OF REFERENCES
[0106] 1: zoom lens [0107] 20: interchangeable lens [0108] 30: camera [0109] 31: camera body [0110] 32: shutter button [0111] 33: power button [0112] 34, 35: operation section [0113] 36: display section [0114] 37: mount [0115] G1: first lens group [0116] G2: second lens group [0117] G3: third lens group [0118] G4 fourth lens group [0119] G5: fifth lens group [0120] G6: sixth lens group [0121] IP: intermediate part [0122] IG1: first positive intermediate part lens group [0123] IG2: second negative intermediate part lens group [0124] IG3: third positive intermediate part lens group [0125] L1a to Lha: lens [0126] Ma: on-axis rays at middle position [0127] Mb: rays with the maximum angle of view at middle position [0128] PP1, PP2: optical member [0129] Sim: image plane [0130] St: aperture stop [0131] Ta: on-axis rays at telephoto end [0132] Tb: rays with the maximum angle of view at telephoto end [0133] Wa: on-axis rays at wide-angle end [0134] Wb: rays with the maximum angle of view at wide-angle end [0135] Z: optical axis