Telephoto zoom lens

Abstract

To provide a telephoto zoom lens with which the overall length and the weight of the whole of a lens system is suppressed and an aberration fluctuation in the whole of an imaging region is small.SOLUTION: A telephoto zoom lens according to the present invention comprises: a first lens group G1 having positive refractive power, an intermediate lens group Gm, and a final lens group Gr, in order from the object side to the image side. When zooming from a wide angle end to a telephoto end, the first lens group G1 is stationary with respect to the image plane, the interval between the adjacent lenses changes, and some or a plurality of lens groups in the intermediate lens group Gm are moved so as to do focusing from object distance infinity to close. The first lens group G1 is composed of a front sub-lens group G1f located on the object side and a rear sub-lens group G1r located on the image side, and satisfies a prescribed conditional expression.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a small, lightweight telephoto zoom lens that is optimal for digital cameras, film cameras, video cameras, etc., and in particular, optimal for mirrorless cameras. [Background technology]

[0002] Telephoto lenses are generally designed to have a so-called telephoto type power arrangement with a positive front group and a negative rear group, so that the overall length of the optical system is short compared to the focal length. In addition, since the diameter of the front group of a telephoto lens is determined by the entrance pupil diameter of the entire system, if the focal length is designed to be long to obtain a desired angle of view, the diameter of the front group becomes large and the weight becomes heavy. Since the diameter of the front group becomes large and the weight becomes heavy, the center of gravity of the optical system moves away from the photographer, which increases the physical burden on the photographer, especially when the lens is held horizontally. Furthermore, if this is made into a zoom lens, the overall length of the optical system becomes long in order to secure the space required for zooming, and the center of gravity of the optical system moves even further away from the photographer.

[0003] Patent Documents 1 and 2 disclose conventional telephoto zoom lenses. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-026392 A [Patent Document 2] Patent No. 7324429 Summary of the Invention [Problem to be solved by the invention]

[0005] The telephoto zoom lenses disclosed in Patent Documents 1 and 2 suppress the ratio of the total lens length to the focal length (telephoto ratio) to keep the total length of the entire lens system short for a telephoto zoom lens. However, there is a problem in that the weight of the lens group closest to the object, which is the heaviest in the entire lens system, is insufficient, resulting in a large weight of the entire lens system and a center of gravity of the entire lens system being farther away from the photographer.

[0006] The present invention has been made in view of the above circumstances, and has an object to provide a telephoto zoom lens system which reduces the overall length and weight of the entire lens system and reduces aberration fluctuations across the entire shooting range. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the telephoto zoom lens of the present invention comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group Gm, and a final lens group Gr, and during zooming from the wide-angle end to the telephoto end, the first lens group G1 is fixed with respect to the image plane, and the spacing between adjacent lens groups changes, and focusing is performed from an object distance of infinity to a close distance by moving a part or a plurality of lens groups within the intermediate lens group Gm, and the first lens group G1 comprises a front sub-lens group G1f located on the object side and a rear sub-lens group G1r located on the image side, and is characterized in that it satisfies the following conditional formula: LT / ft < 0.93 (1) 0.17 < d1 / LT < 0.45 (2) however, LT is the distance on the optical axis from the surface closest to the object to the image plane in the entire lens system. ft is the focal length of the entire lens system when focused at infinity at the telephoto end, d1 is the distance from the surface of the front sub-lens group G1f closest to the image side to the surface of the rear sub-lens group G1r closest to the object side. Effect of the Invention

[0008] According to the present invention, it is possible to provide a telephoto zoom lens that reduces the overall length and weight of the entire lens system and has little aberration fluctuation throughout the entire shooting range. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing the configuration of a telephoto zoom lens according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a longitudinal aberration diagram of the telephoto zoom lens according to the first embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 3] FIG. 1 shows longitudinal aberration diagrams of the telephoto zoom lens according to the first embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 4] FIG. 1A is a longitudinal aberration diagram of the telephoto zoom lens according to the first embodiment of the present invention at the telephoto end when focused on infinity and FIG. 1B is a longitudinal aberration diagram of the telephoto end when the imaging magnification is 40 times. [Diagram 5] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the first embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 6] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the first embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 7] FIG. 1A is a lateral aberration diagram of the telephoto zoom lens according to the first embodiment of the present invention at the telephoto end when focused on infinity and FIG. 1B is a lateral aberration diagram of the telephoto end when the imaging magnification is 40 times. [Figure 8] FIG. 1 shows lateral aberration diagrams of the telephoto zoom lens according to Example 1 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity, with 0.3° image stabilization. [Figure 9] FIG. 1 is a diagram showing the configuration of a telephoto zoom lens according to a second embodiment of the present invention. [Figure 10] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the second embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 11] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the second embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 12] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the second embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 13] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the second embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 14] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the second embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 15] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the second embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 16] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the second embodiment of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity, with 0.3° image stabilization. [Figure 17] FIG. 13 is a diagram showing the configuration of a telephoto zoom lens according to a third embodiment of the present invention. [Figure 18] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the third embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 19] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the third embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 20] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the third embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 21] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the third embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 22] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to the third embodiment of the present invention at the intermediate zoom position when the lens is focused on infinity and when the magnification is 40 times. [Diagram 23] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the third embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 24] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the third embodiment of the present invention when focusing on infinity at (a) the wide-angle end and (b) the telephoto end with 0.3° image stabilization. [Diagram 25] FIG. 11 is a diagram showing the configuration of a telephoto zoom lens according to a fourth embodiment of the present invention. [Figure 26]FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the fourth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 27] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the fourth embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 28] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the fourth embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 29] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the fourth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 30] 4A and 4B are lateral aberration diagrams of the telephoto zoom lens according to the fourth embodiment of the present invention at the intermediate zoom position when focused on infinity and at a magnification of 40 times, respectively. [Diagram 31] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 4 of the present invention at the telephoto end when focused on infinity and at a magnification of 40 times, respectively. [Diagram 32] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 4 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity, and when performing image stabilization at 0.3°. [Diagram 33] FIG. 11 is a diagram showing the configuration of a telephoto zoom lens according to a fifth embodiment of the present invention. [Diagram 34] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the fifth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 35] FIG. 13 is a longitudinal aberration diagram of a telephoto zoom lens according to a fifth embodiment of the present invention at a zoom intermediate position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 36] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the fifth embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 37] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the fifth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 38] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to the fifth embodiment of the present invention at the intermediate zoom position when the lens is focused on infinity and when the magnification is 40 times. [Figure 39]FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the fifth embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 40] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the fifth embodiment of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity and when performing image stabilization at 0.3°. [Diagram 41] FIG. 11 is a diagram showing the configuration of a telephoto zoom lens according to a sixth embodiment of the present invention. [Diagram 42] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the sixth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 43] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the sixth embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 44] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the sixth embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 45] (a) is a lateral aberration diagram of the telephoto zoom lens according to Example 6 of the present invention at the wide-angle end when focused on infinity and (b) is a lateral aberration diagram of the telephoto zoom lens according to Example 6 of the present invention at the wide-angle end when the imaging magnification is 40 times. [Figure 46] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 6 of the present invention at the intermediate zoom position when focused on infinity and at a magnification of 40 times, respectively. [Figure 47] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 6 of the present invention at the telephoto end when focused on infinity and at a magnification of 40 times, respectively. [Figure 48] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 6 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity and when performing image stabilization at 0.3°. [Figure 49] FIG. 11 is a diagram showing the configuration of a telephoto zoom lens according to a seventh embodiment of the present invention. [Figure 50] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the seventh embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 51] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the seventh embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 52]FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the seventh embodiment of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Diagram 53] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to the seventh embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 54] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 7 of the present invention at the intermediate zoom position when the lens is focused on infinity and when the magnification is 40 times. [Figure 55] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 7 of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 56] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 7 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity, and when performing image stabilization at 0.3°. [Figure 57] FIG. 11 is a diagram showing the configuration of a telephoto zoom lens according to an eighth embodiment of the present invention. [Figure 58] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to Example 8 of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 59] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to Example 8 of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 60] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to Example 8 of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 61] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 8 of the present invention at the wide-angle end when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 62] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 8 of the present invention at the intermediate zoom position when focused on infinity and when the imaging magnification is 40 times. [Figure 63] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 8 of the present invention at the telephoto end when focused on infinity and at a magnification of 40 times, respectively. [Figure 64] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 8 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity, and when performing image stabilization at 0.3°. [Figure 65]13 is a diagram showing the configuration of a telephoto zoom lens according to a ninth embodiment of the present invention. [Figure 66] 13A and 13B are longitudinal aberration diagrams of the telephoto zoom lens according to Example 9 of the present invention at the wide-angle end when focused on infinity and when the imaging magnification is 40 times. [Figure 67] 13A and 13B are longitudinal aberration diagrams of the telephoto zoom lens according to Example 9 of the present invention at the intermediate zoom position when the lens is focused on infinity and when the magnification is 40 times. [Figure 68] 13A and 13B are longitudinal aberration diagrams of the telephoto zoom lens according to Example 9 of the present invention at the telephoto end when focused on infinity and at a magnification of 40 times, respectively. [Figure 69] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 9 of the present invention at the wide-angle end when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 70] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 9 of the present invention at the intermediate zoom position when focused on infinity and when the imaging magnification is 40 times. [Figure 71] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 9 of the present invention at the telephoto end when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 72] FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 9 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity and when performing image stabilization at 0.3°. [Figure 73] FIG. 10 is a diagram showing the configuration of a telephoto zoom lens according to a tenth embodiment of the present invention. [Figure 74] FIG. 16 is a longitudinal aberration diagram of the telephoto zoom lens according to the tenth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 75] FIG. 16 is a longitudinal aberration diagram of the telephoto zoom lens according to the tenth embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 76] FIG. 16 is a longitudinal aberration diagram of the telephoto zoom lens according to the tenth embodiment of the present invention at the telephoto end (a) when focused on infinity and (b) when the imaging magnification is 40 times. [Figure 77] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 10 of the present invention at the wide-angle end when focused on infinity and when the imaging magnification is 40 times. [Figure 78]13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 10 of the present invention at the intermediate zoom position when focused on infinity and when the imaging magnification is 40 times. [Figure 79] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to Example 10 of the present invention at the telephoto end when focused on infinity and at a magnification of 40 times, respectively. [Figure 80] FIG. 16 is a lateral aberration diagram of the telephoto zoom lens according to the tenth embodiment of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity and when performing image stabilization at 0.3°. [Figure 81] FIG. 11 is a diagram showing the configuration of a telephoto zoom lens according to an eleventh embodiment of the present invention. [Figure 82] FIG. 16 is a longitudinal aberration diagram of the telephoto zoom lens according to the eleventh embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 83] FIG. 16 is a longitudinal aberration diagram of the telephoto zoom lens according to the eleventh embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 84] FIG. 16 is a longitudinal aberration diagram of the telephoto zoom lens according to Example 11 of the present invention at the telephoto end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 85] FIG. 16 is a lateral aberration diagram of the telephoto zoom lens according to Example 11 of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 86] 11A and 11B are lateral aberration diagrams of the telephoto zoom lens according to the eleventh embodiment of the present invention at the intermediate zoom position when the lens is focused on infinity and when the lens is photographed at a magnification of 40 times. [Figure 87] 11A and 11B are lateral aberration diagrams of the telephoto end of the telephoto zoom lens according to Example 11 of the present invention when focused on infinity and when the imaging magnification is 40 times. [Figure 88] FIG. 16 is a lateral aberration diagram of the telephoto zoom lens according to Example 11 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity and when performing image stabilization at 0.3°. [Figure 89] FIG. 12 is a diagram showing the configuration of a telephoto zoom lens according to a twelfth embodiment of the present invention. [Figure 90] FIG. 12 is a longitudinal aberration diagram of the telephoto zoom lens according to the twelfth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 91]FIG. 12 is a longitudinal aberration diagram of the telephoto zoom lens according to Example 12 of the present invention at the intermediate zoom position when (a) the lens is focused on infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 92] FIG. 12 is a longitudinal aberration diagram of the telephoto end of the telephoto zoom lens according to Example 12 of the present invention when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 93] (a) lateral aberration diagram of the telephoto zoom lens according to Example 12 of the present invention at the wide-angle end when focused on infinity and (b) at a shooting magnification of 40 times [Figure 94] 12A and 12B are lateral aberration diagrams of the telephoto zoom lens according to Example 12 of the present invention at the intermediate zoom position when the lens is focused on infinity and when the magnification is 40 times. [Figure 95] 12A and 12B are lateral aberration diagrams of the telephoto end of the telephoto zoom lens according to Example 12 of the present invention when focused on infinity and when the imaging magnification is 40 times. [Figure 96] Transverse aberration diagrams of the telephoto zoom lens according to Example 12 of the present invention at infinity focus (a) at the wide-angle end and (b) at the telephoto end with 0.3° image stabilization [Figure 97] FIG. 13 is a diagram showing the configuration of a telephoto zoom lens according to a thirteenth embodiment of the present invention. [Figure 98] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the thirteenth embodiment of the present invention at the wide-angle end when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 99] FIG. 13 is a longitudinal aberration diagram of the telephoto zoom lens according to the thirteenth embodiment of the present invention at the intermediate zoom position when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 100] FIG. 13 is a longitudinal aberration diagram of the telephoto end of the telephoto zoom lens according to Example 13 of the present invention when (a) the lens is focused on an object at infinity and (b) the lens is photographed at a magnification of 40 times. [Figure 101] (a) lateral aberration diagram of the telephoto zoom lens according to Example 13 of the present invention at the wide-angle end when focused on infinity and (b) at a shooting magnification of 40 times [Figure 102] 13A and 13B are lateral aberration diagrams of the telephoto zoom lens according to the present invention at the intermediate zoom position when the lens is focused on infinity and when the magnification is 40 times. [Figure 103] (a) lateral aberration diagram of the telephoto zoom lens according to Example 13 of the present invention at the telephoto end when focused on infinity and (b) at a shooting magnification of 40 times [Figure 104]FIG. 13 is a lateral aberration diagram of the telephoto zoom lens according to Example 13 of the present invention at (a) the wide-angle end and (b) the telephoto end when focusing on infinity and when performing image stabilization at 0.3°. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] As can be seen from the lens construction diagrams shown in Figures 1, 9, 17, 25, 33, 41, 49, 57, 65, 73, 81, 89, and 97, the telephoto zoom lens of the present invention comprises, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group Gm, and a final lens group Gr, and during zooming from the wide-angle end to the telephoto end, the first lens group G1 is fixed with respect to the image plane, and the spacing between adjacent lens groups changes, and focusing is performed from an object distance of infinity to a close distance by moving some or more lens groups within the intermediate lens group Gm, and the first lens group G1 comprises a front sub-lens group G1f located on the object side and a rear sub-lens group G1r located on the image side.

[0011] In the telephoto zoom lens of the present invention, the first lens group G1, which is the heaviest in the entire optical system, is fixed during zooming, thereby suppressing fluctuations in the center of gravity and torque fluctuations of the zoom ring during zooming. Also, since cams for moving the first lens group G1 and the like can be omitted, the mechanical structure can be simplified and made lighter. Also, since the light beam diameter is relatively small in the intermediate lens group Gm, by arranging the focus group within the intermediate lens group Gm, it is possible to reduce weight and increase the focusing speed.

[0012] In the telephoto zoom lens of the present invention, while maintaining the telephoto ratio defined in conditional formula (1), the distance between the front sub-lens group G1f, which is located on the object side and has the largest distance in the group, and the rear sub-lens group G1r, which is located on the image side, is defined by conditional formula (2), thereby making the rear sub-lens group G1r smaller in diameter and lighter, and thereby reducing the weight of the entire first lens group G1. LT / ft < 0.93 (1) 0.17 < d1 / LT < 0.45 (2) however, LT is the distance on the optical axis from the surface closest to the object to the image plane in the entire lens system. ft is the focal length of the entire lens system when focused at infinity at the telephoto end, d1 is the distance from the surface of the front sub-lens group G1f closest to the image side to the surface of the rear sub-lens group G1r closest to the object side.

[0013] Conditional formula (1) specifies the overall length of the optical system in order to reduce its size. If the upper limit of conditional formula (1) is exceeded, the overall length of the optical system will increase, hindering the miniaturization of the optical system. Note that by specifying the upper limit of conditional formula (1) as 0.89, the aforementioned effect can be ensured.

[0014] Conditional formula (2) specifies the distance between the front sub lens group G1f and the rear sub lens group G1r in order to reduce the weight. If the lower limit of conditional formula (2) is exceeded, the distance between the front sub lens group G1f and the rear sub lens group G1r is narrowed, and the rear sub lens group G1r is disposed closer to the front lens group G1f on the object side. This increases the height of the light beam at the rear sub lens group G1r and increases the lens diameter, increasing the weight of the rear sub lens group G1r and hindering the reduction in weight of the optical system. On the other hand, if the upper limit of conditional formula (2) is exceeded, the distance between the front sub lens group G1f and the rear sub lens group G1r is widened, and the height of the light beam at the rear sub lens group G1r is reduced, so that the weight of the rear sub lens group G1r can be reduced, but the overall lens length is extended, hindering the miniaturization of the optical system. Note that by specifying the upper limit of the above-mentioned conditional formula (2) to 0.42 and the lower limit to 0.18, the above-mentioned effect can be more reliably achieved.

[0015] The telephoto zoom lens of the present invention is further characterized in that it satisfies the following conditional expression: 1.01 < f1f / f1 < 3.45 (3) however, f1f is the focal length of the front sub-lens group G1f, f1 is the focal length of the first lens group G1.

[0016] Conditional formula (3) specifies the refractive power of the front sub lens group G1f in order to achieve both compactness and lightness and high performance. If the upper limit of conditional formula (3) is exceeded and the positive refractive power of the front sub lens group G1f is reduced, the on-axis ray angle emerging from the front sub lens group G1f becomes gentle. For this reason, in order to reduce the ray diameter at the rear sub lens group G1r, it is necessary to widen the interval d1, which increases the overall length of the optical system and hinders compactness. On the other hand, if the lower limit of conditional formula (3) is exceeded and the positive refractive power of the front sub lens group G1f is increased, the on-axis ray angle emerging from the front sub lens group G1f becomes steep, so that the lens diameter can be reduced without the need to widen the interval d1, which is advantageous for compactness and lightness. On the other hand, the spherical aberration and coma aberration occurring in the front sub lens group G1f, particularly at the telephoto end, become worse, making it difficult to satisfactorily correct this in the entire lens system. Incidentally, by setting the upper limit of the above-mentioned conditional expression (3) at 2.92 and the lower limit at 1.20, the above-mentioned effect can be achieved more reliably.

[0017] The telephoto zoom lens of the present invention is further characterized in that the first lens group G1 satisfies the following conditional expression: 0.15 < f1 / ft < 0.57 (4)

[0018] Conditional expression (4) specifies the refractive power of the first lens group G1 in order to achieve both compactness and high performance. If the positive refractive power of the first lens group G1 is reduced by exceeding the upper limit of conditional expression (4), the overall length of the optical system is increased, which hinders compactness. On the other hand, if the positive refractive power of the first lens group G1 is increased by falling below the lower limit of conditional expression (4), this is advantageous for compactness, but the spherical aberration and coma aberration generated in the first lens group G1, particularly at the telephoto end, become worse, making it difficult to correct them well in the entire lens system. Note that by specifying the upper limit of the above-mentioned conditional expression (4) to 0.49 and the lower limit to 0.18, the above-mentioned effect can be more reliably achieved.

[0019] The telephoto zoom lens of the present invention is further characterized in that the first lens group G1 is composed of five or less lens elements, which makes it possible to reduce the weight of the first lens group G1 while ensuring high optical performance.

[0020] The telephoto zoom lens of the present invention is further characterized in that the front sub-lens group G1f includes at least one positive lens element that satisfies the following conditional expression: SG1fp < 4.00 (5) 45.00 < vd1fp (6) however, The SG1fp has a positive lens element density, vd1fp is the Abbe number of the positive lens element.

[0021] Conditional formula (5) specifies the specific gravity of the positive lens elements included in the front sub lens group G1f in order to reduce weight. If the upper limit of conditional formula (5) is exceeded and the specific gravity of the positive lens elements becomes large, the weight of the front sub lens group G1f increases, which hinders weight reduction. By specifying the upper limit of conditional formula (5) as 3.80, the above-mentioned effect can be more reliably achieved.

[0022] Conditional formula (6) specifies the Abbe number of the positive lens element included in the front sub-lens group G1f in order to improve performance. If the lower limit of conditional formula (6) is exceeded, the axial chromatic aberration generated in the front sub-lens group G1f deteriorates, particularly at the telephoto end, and it becomes difficult to satisfactorily correct this in the entire lens system. In addition, by specifying the lower limit of the above-mentioned conditional formula (6) as 47.00, the above-mentioned effect can be more reliably achieved.

[0023] The telephoto zoom lens of the present invention is further characterized in that a second lens unit L2 having negative refractive power is disposed closest to the object side of the intermediate lens unit Gm, and the following conditional expression is satisfied: -0.78 < f2 / ft < -0.13 (7) however, f2 is the focal length of the second lens group G2.

[0024] Conditional expression (7) specifies the refractive power of the second lens group G2 in order to achieve both high performance and compactness. If the negative refractive power of the second lens group G2 is smaller than the lower limit of conditional expression (7), the amount of movement of the second lens group G2 during zooming increases, and the overall lens length increases, hindering compactness. On the other hand, if the negative refractive power of the second lens group G2 is larger than the upper limit of conditional expression (7), the amount of movement during zooming decreases, which is advantageous for compactness, but aberration fluctuations during zooming, particularly spherical aberration and field curvature fluctuations from the middle to the telephoto end of the zoom range, worsen, making it difficult to correct these well in the entire lens system. Note that the above-mentioned effect can be more reliably achieved by specifying the upper limit of the above-mentioned conditional expression (7) to -0.15 and the lower limit to -0.66.

[0025] The telephoto zoom lens of the present invention is further characterized in that the intermediate lens group Gm has a third lens group L3 having negative refractive power arranged adjacent to the image side of the second lens group G2, and satisfies the following conditional expression: -0.65 < f3 / ft < -0.07 (8) however, f3 is the focal length of the third lens group G3.

[0026] Conditional expression (8) specifies the refractive power of the third lens group G3 in order to achieve both high performance and compactness. If the upper limit of conditional expression (8) is exceeded and the positive refractive power of the third lens group G3 is reduced, the amount of movement during zooming increases and the overall lens length increases, hindering compactness. On the other hand, if the lower limit of conditional expression (8) is exceeded and the positive refractive power of the third lens group G3 is increased, the amount of movement during zooming decreases, which is advantageous for compactness, but aberration fluctuations during zooming, particularly spherical aberration and field curvature fluctuations, become worse, making it difficult to satisfactorily correct these in the entire lens system. Note that by specifying the upper limit of the above-mentioned conditional expression (8) to -0.08 and the lower limit to -0.55, the above-mentioned effect can be more reliably achieved.

[0027] Furthermore, by configuring the second lens group G2 and the third lens group G3 to move along different trajectories during zooming, it is possible to suppress fluctuations in field curvature and spherical aberration during zooming.

[0028] The telephoto zoom lens of the present invention is further characterized in that it satisfies the following conditional expression: 0.13 < EXP / LT < 0.75 (9) however, EXP is the distance from the exit pupil to the image plane when focused at infinity across the entire zoom range from the wide-angle end to the telephoto end.

[0029] Conditional formula (9) specifies the position of the exit pupil for miniaturization and high performance. If the upper limit of conditional formula (9) is exceeded and the exit pupil position is farther from the image plane, the height of the light rays at the final lens group increases, leading to an increase in the product diameter. In addition, if an attempt is made to reduce the product diameter, light vignetting occurs due to mechanical parts near the lens and camera mount, resulting in a decrease in peripheral light amount and worsening of vignetting. On the other hand, if the lower limit of conditional formula (9) is exceeded and the exit pupil position is closer to the image plane, this is advantageous for miniaturization of the product, but the peripheral chief ray incidence angle to the camera sensor increases, causing light attenuation and coloring in the periphery of the image. Note that the above-mentioned effect can be more reliably achieved by specifying the upper limit of the above-mentioned conditional formula (9) to 0.60 and the lower limit to 0.16.

[0030] The telephoto zoom lens of the present invention is further characterized in that the final lens group Gr has an image stabilizing lens group Gos which performs image stabilization by moving a part of it in a substantially vertical direction, and which satisfies the following conditional expression: 1.54 < |βTosb×(1-βTos)| < 3.30 (10) however, βTosb is the lateral magnification of the lens group disposed on the image side of the image stabilization lens group Gos when focusing on infinity at the telephoto end, βTos is the lateral magnification of the image stabilization lens group Gos when focusing on infinity at the telephoto end.

[0031] Conditional formula (10) specifies the absolute value of the vibration-proof coefficient of the image stabilization lens group Gos when focusing on infinity at the telephoto end in order to improve performance and reduce size. If the absolute value of the vibration-proof coefficient exceeds the upper limit of conditional formula (10) and becomes large, the refractive power of the image stabilization lens group Gos becomes strong, so that coma aberration and astigmatism fluctuation due to decentering during vibration proofing become large, which not only makes it difficult to correct them well, but also increases the amount of image displacement on the image plane per unit shift amount of the image stabilization lens group Gos, making it more difficult to control the vibration proof mechanism. In addition, the weight of the image stabilization lens group Gos increases, so that the actuator that moves the image stabilization lens group becomes large, leading to an increase in product size. On the other hand, if the absolute value of the vibration-proof coefficient falls below the lower limit of conditional formula (10) and becomes small, the amount of movement of the image stabilization lens group in the approximately vertical direction becomes large, which increases the size of the image stabilization unit and the product size. Incidentally, by setting the upper limit of the above-mentioned conditional expression (10) at 2.79 and the lower limit at 1.82, the above-mentioned effect can be achieved more reliably.

[0032] The telephoto zoom lens of the present invention is further characterized in that the second lens group G2 is made of one negative lens element. By configuring the second lens group G2 with only a single lens element, the lens weight can be reduced.

[0033] The telephoto zoom lens of the present invention is further characterized in that focusing from an object distance of infinity to a close distance is performed by moving at least one lens group arranged on the image side of the aperture diaphragm S. Since axial rays converge on the image side of the aperture diaphragm S, it is easier to make the lens diameter smaller and lighter than on the object side of the aperture diaphragm S, so by performing focusing with the lens group on the image side of the aperture diaphragm S, it is possible to make the focus unit more compact and increase the focusing speed.

[0034] The telephoto zoom lens of the present invention is further characterized in that one or two of the lens groups that move during focusing are composed of single lens elements, which allows the focus group to be made lighter, the focus unit to be made more compact, and the focusing speed to be increased.

[0035] The telephoto zoom lens of the present invention is further characterized by not including a diffractive optical element. By using a diffractive optical element, it is expected that chromatic aberration can be corrected well, but on the other hand, a ghost (halo) occurs around the light source, which is specific to the diffractive optical element, making it difficult to correct well. By not including a diffractive optical element, it has the advantage that the ghost, which is specific to the use of a diffractive optical element, does not occur.

[0036] Furthermore, in the telephoto zoom lens of the present invention, it is more effective to have the following configuration.

[0037] During zooming from the wide-angle end to the telephoto end and during focusing from an object distance of infinity to a close distance, it is preferable that the final lens group Gr is fixed relative to the image plane, which makes it possible to omit mechanical parts such as cams for moving the final lens group Gr, thereby simplifying the mechanical structure and making it lighter.

[0038] It is also preferable that the following conditional expression be satisfied: 0.24 < Ds / LT < 0.52 (11) however, Ds is the distance from the aperture stop S to the image plane at the wide-angle end.

[0039] Conditional formula (11) specifies the distance from the aperture diaphragm S to the image plane at the wide-angle end for the purpose of miniaturization. If the upper limit of conditional formula (11) is exceeded and the aperture diaphragm S is located farther toward the object side, the lens group spacing on the object side of the aperture diaphragm S becomes narrower, resulting in a lack of spacing required for zooming. If an attempt is made to compensate for this, the overall lens length increases, hindering miniaturization of the product. If the lower limit of conditional formula (11) is exceeded and the aperture diaphragm S is located closer to the image side, the outer diameter of the product increases, particularly when the aperture unit, focus group unit, and image stabilization group unit are arranged on the image side of the aperture diaphragm S so as not to interfere with each other mechanically, hindering miniaturization of the product. Note that the above-mentioned effect can be more reliably achieved by specifying the upper limit of the above-mentioned conditional formula (12) to 0.44 and the lower limit to 0.29.

[0040] It is also preferable that the following conditional expression be satisfied: 5.42 < 2ωw < 14.46 (12) however, 2ωw is the total angle of view (unit: degrees) of the entire lens system when focused at infinity at the wide-angle end.

[0041] Conditional expression (12) defines the total angle of view at the wide-angle end. By satisfying conditional expression (12), a sufficient angle of view can be obtained as the wide-angle end of a telephoto zoom lens. It is more preferable to set the upper limit of conditional expression (12) to 13.81 and the lower limit to 5.68.

[0042] It is also preferable that the following conditional expression be satisfied: 2.81 < 2ωt < 4.66 (13) however, 2ωt is the total angle of view (unit: degrees) of the entire lens system when focused at infinity at the telephoto end.

[0043] Conditional expression (13) defines the total angle of view at the telephoto end. By satisfying conditional expression (13), a sufficient angle of view can be obtained for the telephoto end of the telephoto zoom lens. It is more preferable to set the upper limit of conditional expression (13) to 4.45 and the lower limit to 2.95.

[0044] Next, a lens configuration of an embodiment of the telephoto zoom lens of the present invention will be described below. Note that in the following description, the lens configuration will be described in order from the object side to the image side. EXAMPLES

[0045] FIG. 1 is a lens configuration diagram of a telephoto zoom lens according to a first embodiment of the present invention.

[0046] The first lens group G1 is composed of a front sub-lens group G1f consisting of a biconvex positive lens, and a rear sub-lens group G1r consisting of, from the object side to the image side, a meniscus negative lens with its concave surface facing the object side and a meniscus positive lens with its convex surface facing the object side, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0047] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, an aperture stop S, a fifth lens group G5, a sixth lens group G6, and a seventh lens group G7.

[0048] The second lens group G2 is composed of a negative meniscus lens with a convex surface facing the object side.

[0049] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0050] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex positive lens, a meniscus positive lens with its convex surface facing the object side, and a cemented lens made of a meniscus negative lens with its convex surface facing the object side and a meniscus positive lens with its convex surface facing the object side, and has positive refractive power overall.

[0051] The aperture diaphragm S is disposed between the fourth lens group G4 and the fifth lens group G5, and moves integrally with the fifth lens group G5 during zooming.

[0052] The fifth lens group G5 is composed of a positive meniscus lens with its convex surface facing the object side.

[0053] The sixth lens group G6 is composed of a positive meniscus lens with a convex surface facing the object side, and moves toward the object side along the optical axis during focusing from an object distance of infinity to a close distance.

[0054] The seventh lens group G7 is composed of a negative meniscus lens with a convex surface facing the object side, and moves along the optical axis toward the image side during focusing from an object distance of infinity to a close distance.

[0055] The final lens group Gr is composed of, in order from the object side to the image side, an image stabilization group Gos consisting of a cemented lens of a biconvex positive lens and a biconcave negative lens, a matching lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with its convex surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a biconcave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0056] The filter fr is a plug-in rear filter. EXAMPLES

[0057] FIG. 9 is a lens configuration diagram of a telephoto zoom lens according to a second embodiment of the present invention.

[0058] The first lens group G1 is composed of a front sub-lens group G1f consisting of, in order from the object side to the image side, a biconvex positive lens and a meniscus positive lens with its convex surface facing the object side, and a rear sub-lens group G1r consisting of, in order from the object side to the image side, a biconcave negative lens and a biconvex positive lens, the group has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0059] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, an aperture stop S, a sixth lens group G6, and a seventh lens group G7.

[0060] The second lens group G2 is composed of a negative meniscus lens with a convex surface facing the object side.

[0061] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0062] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex positive lens and a biconvex positive lens, and has positive refractive power as a whole.

[0063] The fifth lens group G5 is composed of, in order from the object side to the image side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and has negative refractive power as a whole.

[0064] The aperture diaphragm S is disposed between the fifth lens group G5 and the sixth lens group G6, and moves integrally with the sixth lens group G6 during zooming.

[0065] The sixth lens group G6 is composed of, in order from the object side to the image side, a meniscus positive lens with a convex surface facing the object side and a meniscus positive lens with a convex surface facing the object side, and has positive refractive power as a whole.

[0066] The seventh lens group G7 is composed of a biconcave negative lens, and moves toward the image side along the optical axis during focusing from an object distance of infinity to a close distance.

[0067] The final lens group Gr is composed of, in order from the object side to the image side, a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, an image stabilization group Gos composed of a matching lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with its convex surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0068] The filter fr is a plug-in rear filter. EXAMPLES

[0069] FIG. 17 is a lens configuration diagram of a telephoto zoom lens according to a third embodiment of the present invention.

[0070] The first lens group G1 is composed of a front sub-lens group G1f consisting of a meniscus positive lens with its convex surface facing the object side, and a rear sub-lens group G1r consisting of, in order from the object side to the image side, a biconvex positive lens, a biconcave negative lens, and a biconvex positive lens, has positive refractive power overall, and is fixed with respect to the image plane during zooming.

[0071] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, an aperture stop S, a fifth lens group G5, and a sixth lens group G6.

[0072] The second lens group G2 is composed of a biconcave negative lens.

[0073] The third lens group G3 is composed of a cemented lens, from the object side to the image side, of a meniscus positive lens with its concave surface facing the object side and a biconcave negative lens, and has negative refractive power as a whole.

[0074] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex positive lens, a biconvex lens, and a cemented lens of a biconvex positive lens and a biconcave lens, and has positive refractive power as a whole.

[0075] The aperture stop S is disposed between the fourth lens group G4 and the fifth lens group G5, and is fixed with respect to the image plane during zooming.

[0076] The fifth lens group G5 is composed of a positive meniscus lens with its convex surface facing the object side, and moves toward the object side along the optical axis during focusing from an object distance of infinity to a close distance.

[0077] The sixth lens group G6 is composed of a negative meniscus lens with a convex surface facing the object side, and moves along the optical axis toward the image side during focusing from an object distance of infinity to a close distance.

[0078] The final lens group Gr is composed of, in order from the object side to the image side, a camera shake correction group Gos consisting of a matching lens of a meniscus negative lens with a convex surface facing the object side and a biconvex positive lens, a matching lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with a convex surface facing the object side, a meniscus positive lens with a convex surface facing the object side, a cemented lens of a biconcave negative lens and a biconvex positive lens, a filter fr, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming. EXAMPLES

[0079] FIG. 25 is a lens configuration diagram of a telephoto zoom lens according to a fourth embodiment of the present invention.

[0080] The first lens group G1 is composed of a front sub-lens group G1f consisting of, in order from the object side to the image side, a biconvex positive lens and a meniscus positive lens with its convex surface facing the object side, and a rear sub-lens group G1r consisting of, in order from the object side to the image side, a biconcave negative lens and a meniscus positive lens with its convex surface facing the object side, the group as a whole has positive refractive power and is fixed with respect to the image plane during zooming.

[0081] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, an aperture stop S, and a sixth lens group G6.

[0082] The second lens group G2 is composed of a negative meniscus lens with its concave surface facing the object side.

[0083] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0084] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex positive lens, a meniscus positive lens with its convex surface facing the object side, and a cemented lens of a meniscus negative lens with its convex surface facing the object side and a meniscus positive lens with its convex surface facing the object side, and has positive refractive power overall.

[0085] The aperture diaphragm S is disposed between the fourth lens group G4 and the fifth lens group G5, and moves integrally with the fifth lens group G5 during zooming.

[0086] The fifth lens group G5 is composed of, from the object side to the image side, a meniscus positive lens with a convex surface facing the object side and a meniscus positive lens with a convex surface facing the object side, and has positive refractive power as a whole.

[0087] The sixth lens group G6 is composed of a negative meniscus lens with a convex surface facing the object side, and moves along the optical axis toward the image side during focusing from an object distance of infinity to a close distance.

[0088] The final lens group Gr is composed of, in order from the object side to the image side, a camera shake correction group Gos consisting of a cemented lens of a biconvex positive lens and a biconcave negative lens, a matching lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with its convex surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0089] The filter fr is a plug-in rear filter. EXAMPLES

[0090] FIG. 33 is a lens configuration diagram of a telephoto zoom lens according to a fifth embodiment of the present invention.

[0091] The first lens group G1 is composed of a front sub-lens group G1f consisting of a biconvex positive lens, and a rear sub-lens group G1r consisting of, in order from the object side to the image side, a meniscus positive lens with its convex surface facing the object side, a biconcave negative lens, and a biconvex positive lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0092] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, an aperture stop S, a sixth lens group G6, and a seventh lens group G7.

[0093] The second lens group G2 is composed of a negative meniscus lens with its concave surface facing the object side.

[0094] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0095] The fourth lens group G4 is composed of a biconvex lens and a biconvex lens, in that order from the object side to the image side, and has positive refractive power as a whole.

[0096] The fifth lens group G5 is composed of a cemented lens of a biconvex lens and a biconcave lens, in that order from the object side to the image side, and has negative refractive power as a whole.

[0097] The aperture diaphragm S is disposed between the fifth lens group G5 and the sixth lens group G6, and moves integrally with the sixth lens group G6 during zooming.

[0098] The sixth lens group G6 is composed of, in order from the object side to the image side, a meniscus positive lens with a convex surface facing the object side and a meniscus positive lens with a convex surface facing the object side, and has positive refractive power as a whole.

[0099] The seventh lens group G7 is composed of a biconcave negative lens, and moves toward the image side along the optical axis during focusing from an object distance of infinity to a close distance.

[0100] The final lens group Gr is composed of, in order from the object side to the image side, a camera shake correction group Gos consisting of a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with its convex surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0101] The filter fr is a plug-in rear filter. EXAMPLES

[0102] FIG. 41 is a lens configuration diagram of a telephoto zoom lens according to a sixth embodiment of the present invention.

[0103] The first lens group G1 is composed of a front sub-lens group G1f consisting of a biconvex positive lens, and a rear sub-lens group G1r consisting of, in order from the object side to the image side, a meniscus positive lens with its convex surface facing the object side, a biconcave negative lens, and a biconvex positive lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0104] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, an aperture stop S, a fifth lens group G5, and a sixth lens group G6.

[0105] The second lens group G2 is composed of a negative meniscus lens with its concave surface facing the object side.

[0106] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0107] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex lens, a biconvex lens, and a cemented lens of a biconvex lens and a biconcave lens, and has positive refractive power as a whole.

[0108] The aperture diaphragm S is disposed between the fourth lens group G4 and the fifth lens group G5, and moves integrally with the fifth lens group G5 during zooming.

[0109] The fifth lens group G5 is composed of, from the object side to the image side, a meniscus negative lens with its convex surface facing the object side and a biconvex positive lens, and has positive refractive power as a whole.

[0110] The sixth lens group G6 is composed of a biconcave negative lens, and moves toward the image side along the optical axis during focusing from an object distance of infinity to a close distance.

[0111] The final lens group Gr is composed of, in order from the object side to the image side, an image stabilization group Gos consisting of a cemented lens of a meniscus negative lens with its concave surface facing the object side and a meniscus positive lens with its concave surface facing the object side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a meniscus negative lens with its convex surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a meniscus positive lens with its convex surface facing the object side, and a cemented lens of a biconvex lens and a meniscus negative lens with its concave surface facing the object side. Overall, it has negative refractive power and is fixed with respect to the image plane during zooming.

[0112] The filter fr is a plug-in rear filter. EXAMPLES

[0113] FIG. 49 is a lens configuration diagram of a telephoto zoom lens according to a seventh embodiment of the present invention.

[0114] The first lens group G1 is composed of a front sub-lens group G1f consisting of a biconvex positive lens, and a rear sub-lens group G1r consisting of, from the object side to the image side, a meniscus negative lens with its concave surface facing the object side and a meniscus positive lens with its convex surface facing the object side, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0115] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, an aperture stop S, a fifth lens group G5, and a sixth lens group G6.

[0116] The second lens group G2 is composed of a biconcave negative lens.

[0117] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0118] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex lens, a biconvex lens, and a cemented lens of a biconvex lens and a biconcave lens, and has positive refractive power as a whole.

[0119] The aperture diaphragm S is disposed between the fourth lens group G4 and the fifth lens group G5, and moves integrally with the fifth lens group G5 during zooming.

[0120] The fifth lens group G5 is composed of, from the object side to the image side, a negative meniscus lens with a convex surface facing the object side and a positive meniscus lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0121] The sixth lens group G6 is composed of a negative meniscus lens with a convex surface facing the object side, and moves along the optical axis toward the image side during focusing from an object distance of infinity to a close distance.

[0122] The final lens group Gr is composed of, in order from the object side to the image side, a camera shake correction group Gos composed of a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a biconvex positive lens, a biconcave negative lens, a biconvex positive lens, and a cemented lens of a biconvex lens and a biconcave negative lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0123] The filter fr is a plug-in rear filter. EXAMPLES

[0124] FIG. 57 is a lens configuration diagram of a telephoto zoom lens according to an eighth embodiment of the present invention.

[0125] The first lens group G1 is composed of a front sub-lens group G1f consisting of a biconvex positive lens, and a rear sub-lens group G1r consisting of, in that order from the object side to the image side, a meniscus positive lens with its convex surface facing the object side, a meniscus negative lens with its concave surface facing the object side, and a biconvex positive lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0126] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, an aperture stop S, a sixth lens group G6, and a seventh lens group G7.

[0127] The second lens group G2 is composed of a negative meniscus lens with its concave surface facing the object side.

[0128] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with a convex surface facing the object side, and has negative refractive power as a whole.

[0129] The fourth lens group G4 is composed of a biconvex lens and a biconvex lens, in that order from the object side to the image side, and has positive refractive power as a whole.

[0130] The fifth lens group G5 is composed of a cemented lens of a biconvex lens and a biconcave lens, in that order from the object side to the image side, and has negative refractive power as a whole.

[0131] The aperture diaphragm S is disposed between the fifth lens group G5 and the sixth lens group G6, and moves integrally with the sixth lens group G6 during zooming.

[0132] The sixth lens group G6 is composed of, from the object side to the image side, a meniscus negative lens with its concave surface facing the object side and a biconvex positive lens, and has positive refractive power as a whole.

[0133] The seventh lens group G7 is composed of a biconcave negative lens. The sixth lens group G6 moves toward the image side along the optical axis during focusing from an object distance of infinity to a close distance.

[0134] The final lens group Gr is composed of, in order from the object side to the image side, an image stabilization group Gos consisting of a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a meniscus negative lens with its concave surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a biconvex positive lens, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a meniscus positive lens with its convex surface facing the object side, and a cemented lens of a biconvex lens and a biconcave negative lens, and has negative refractive power overall and is fixed with respect to the image plane during zooming.

[0135] The filter fr is a plug-in rear filter. EXAMPLES

[0136] FIG. 65 is a lens configuration diagram of a telephoto zoom lens according to a ninth embodiment of the present invention.

[0137] The first lens group G1 is composed of a front sub-lens group G1f consisting of a biconvex positive lens, and a rear sub-lens group G1r consisting of a meniscus negative lens with its concave surface facing the object side and a meniscus positive lens with its convex surface facing the object side, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0138] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, an aperture stop S, a sixth lens group G6, and a seventh lens group G7.

[0139] The second lens group G2 is composed of a negative meniscus lens with its concave surface facing the object side.

[0140] The third lens group G3 is composed of a biconcave negative lens.

[0141] The fourth lens group G4 is composed of a cemented lens of a biconvex lens and a biconcave lens, in that order from the object side to the image side, and has positive refractive power as a whole.

[0142] The fifth lens group G5 is composed of, in order from the object side to the image side, a biconvex positive lens, a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall.

[0143] The aperture stop S is disposed between the fifth lens group G5 and the sixth lens group G6, and is fixed with respect to the image plane during zooming.

[0144] The sixth lens group G6 is composed of a positive meniscus lens with a convex surface facing the object side, and moves toward the object side along the optical axis during focusing from an object distance of infinity to a close distance.

[0145] The seventh lens group G7 is composed of a negative meniscus lens with a convex surface facing the object side, and moves along the optical axis toward the image side during focusing from an object distance of infinity to a close distance.

[0146] The final lens group Gr is composed of, in order from the object side to the image side, a camera shake correction group Gos consisting of a cemented lens of a biconvex positive lens and a biconcave negative lens, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a meniscus negative lens with its convex surface facing the object side and a meniscus positive lens with its convex surface facing the object side, a filter fr, a cemented lens of a biconcave negative lens and a biconvex positive lens, a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, and a meniscus negative lens with its concave surface facing the object side. Overall, it has positive refractive power and is fixed with respect to the image plane during zooming. EXAMPLES

[0147] FIG. 73 is a lens configuration diagram of a telephoto zoom lens according to a tenth embodiment of the present invention.

[0148] The first lens group G1 is composed of a front sub-lens group G1f consisting of a biconvex positive lens, and a rear sub-lens group G1r consisting of a meniscus positive lens with a convex surface facing the object side, a meniscus negative lens with a concave surface facing the object side, and a biconvex positive lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0149] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, an aperture stop S, a sixth lens group G6, and a seventh lens group G7.

[0150] The second lens group G2 is composed of a negative meniscus lens with its concave surface facing the object side.

[0151] The third lens group G3 is composed of a biconcave negative lens.

[0152] The fourth lens group G4 is composed of a biconvex lens and a biconvex lens, in that order from the object side to the image side, and has positive refractive power as a whole.

[0153] The fifth lens group G5 is composed of a cemented lens of a biconvex lens and a biconcave lens, in that order from the object side to the image side, and has negative refractive power as a whole.

[0154] The aperture diaphragm S is disposed between the fifth lens group G5 and the sixth lens group G6, and moves integrally with the sixth lens group G6 during zooming.

[0155] The sixth lens group G6 is composed of, from the object side to the image side, a meniscus negative lens with its concave surface facing the object side and a biconvex positive lens, and has positive refractive power as a whole.

[0156] The seventh lens group G7 is composed of a biconcave negative lens, and moves toward the image side along the optical axis during focusing from an object distance of infinity to a close distance.

[0157] The final lens group Gr is composed of, in order from the object side to the image side, an image stabilization group Gos consisting of a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a meniscus negative lens with its concave surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a biconvex positive lens, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a meniscus positive lens with its convex surface facing the object side, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has negative refractive power overall.

[0158] The filter fr is a plug-in rear filter. EXAMPLES

[0159] FIG. 81 is a lens configuration diagram of a telephoto zoom lens according to an eleventh embodiment of the present invention.

[0160] The first lens group G1 is composed of, in order from the object side to the image side, a front sub-lens group G1f consisting of a biconvex positive lens and a meniscus positive lens with its convex surface facing the object side, and a rear sub-lens group G1r consisting of a meniscus positive lens with its convex surface facing the object side, a meniscus negative lens with its convex surface facing the object side, and a meniscus positive lens with its convex surface facing the object side, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0161] The intermediate lens group Gm is composed of a second lens group G2, a third lens group G3, a fourth lens group G4, an aperture stop S, a fifth lens group G5, a sixth lens group G6, and a seventh lens group G7.

[0162] The second lens group G2 is composed of a biconcave negative lens.

[0163] The third lens group G3 is composed of a cemented lens consisting of a biconcave negative lens and a meniscus positive lens with its convex surface facing the object side, and has negative refractive power as a whole.

[0164] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex positive lens, a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall.

[0165] The aperture stop S is disposed between the fourth lens group G4 and the fifth lens group G5, and is fixed with respect to the image plane during zooming.

[0166] The fifth lens group G5 is composed, from the object side to the image side, of a meniscus positive lens with its convex surface facing the object side and a meniscus positive lens with its convex surface facing the object side, has positive refractive power as a whole, and is fixed with respect to the image plane during zooming.

[0167] The sixth lens group G6 is composed of a negative meniscus lens with a convex surface facing the object side, and moves along the optical axis toward the image side during focusing from an object distance of infinity to a close distance.

[0168] The seventh lens group G7 is composed of, in order from the object side to the image side, a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, and has positive refractive power as a whole. The seventh lens group G7 moves toward the object side along the optical axis during focusing from an object distance of infinity to a close distance.

[0169] The final lens group Gr is composed of an image stabilization group Gos consisting of a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with its convex surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has negative refractive power overall and is fixed with respect to the image plane during zooming.

[0170] The filter fr is a plug-in rear filter. EXAMPLES

[0171] FIG. 89 is a lens configuration diagram of a telephoto zoom lens according to a twelfth embodiment of the present invention.

[0172] The first lens group G1 is composed of, in order from the object side to the image side, a front sub-lens group G1f consisting of a biconvex positive lens and a meniscus positive lens with its convex surface facing the object side, and a rear sub-lens group G1r consisting of a meniscus positive lens with its convex surface facing the object side, a meniscus negative lens with its convex surface facing the object side, and a meniscus positive lens with its convex surface facing the object side, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0173] The intermediate lens group Gm is made up of a second lens group G2, a third lens group G3, a fourth lens group G4, an aperture stop S, a fifth lens group G5, and a sixth lens group G6.

[0174] The second lens group G2 is composed of a negative meniscus lens with a convex surface facing the object side.

[0175] The third lens group G3 is composed of a cemented lens consisting of a biconcave negative lens and a meniscus positive lens with its convex surface facing the object side, and has negative refractive power as a whole.

[0176] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex positive lens, a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall.

[0177] The aperture stop S is disposed between the fourth lens group G4 and the fifth lens group G5, and is fixed with respect to the image plane during zooming.

[0178] The fifth lens group G5 is composed, from the object side to the image side, of a meniscus positive lens with its convex surface facing the object side and a meniscus positive lens with its convex surface facing the object side, has positive refractive power as a whole, and is fixed with respect to the image plane during zooming.

[0179] The sixth lens group G6 is composed of a biconcave negative lens, and moves toward the image side along the optical axis during focusing from an object distance of infinity to a close distance.

[0180] The final lens group Gr is composed of, in order from the object side to the image side, a camera shake correction group Gos composed of a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, a cemented lens of a biconvex positive lens and a biconcave negative lens, and a biconcave negative lens, a meniscus positive lens with its convex surface facing the object side, a meniscus positive lens with its convex surface facing the object side, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a biconvex positive lens and a biconcave negative lens, and has positive refractive power overall and is fixed with respect to the image plane during zooming.

[0181] The filter fr is a plug-in rear filter. EXAMPLES

[0182] FIG. 97 is a lens configuration diagram of a telephoto zoom lens according to a thirteenth embodiment of the present invention.

[0183] The first lens group G1 is composed of, in order from the object side to the image side, a front sub-lens group G1f consisting of a meniscus positive lens with a convex surface facing the object side and a meniscus positive lens with a convex surface facing the object side, and a rear sub-lens group G1r consisting of a meniscus positive lens with a convex surface facing the object side, a biconcave negative lens, and a meniscus positive lens with a convex surface facing the object side. It has a positive refractive power overall and is fixed with respect to the image plane during zooming.

[0184] The intermediate lens group Gm is composed of a second lens group G2, a third lens group G3, a fourth lens group G4, an aperture stop S, a fifth lens group G5, a sixth lens group G6, and a seventh lens group G7.

[0185] The second lens group G2 is composed of a biconcave negative lens.

[0186] The third lens group G3 is composed of, in order from the object side to the image side, a cemented lens of a biconcave negative lens and a meniscus positive lens with its convex surface facing the object side, and has negative refractive power as a whole.

[0187] The fourth lens group G4 is composed of, in order from the object side to the image side, a biconvex positive lens, a biconvex positive lens, and a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, and has positive refractive power overall.

[0188] The aperture stop S is disposed between the fourth lens group G4 and the fifth lens group G5, and is fixed with respect to the image plane during zooming.

[0189] The fifth lens group G5 is composed, from the object side to the image side, of a meniscus positive lens with its convex surface facing the object side and a meniscus positive lens with its convex surface facing the object side, has positive refractive power as a whole, and is fixed with respect to the image plane during zooming.

[0190] The sixth lens group G6 is composed of a negative meniscus lens with its concave surface facing the object side, and moves toward the image side along the optical axis during focusing from an object distance of infinity to a close distance.

[0191] The seventh lens group G7 is composed of, in order from the object side to the image side, a cemented lens of a biconvex positive lens and a meniscus negative lens with its concave surface facing the object side, and has positive refractive power as a whole. The seventh lens group G7 moves toward the object side along the optical axis during focusing from an object distance of infinity to a close distance.

[0192] The final lens group Gr is composed of, in order from the object side to the image side, an image stabilization group Gos consisting of a cemented lens of a meniscus positive lens with a convex surface facing the object side and a meniscus negative lens whose image side surface is aspheric and convex surface facing the object side, and a biconcave negative lens, a meniscus positive lens with a convex surface facing the object side, a cemented lens of a plano-concave negative lens and a biconvex positive lens, a cemented lens of a biconcave negative lens and a biconvex positive lens, and a cemented lens of a meniscus positive lens with a concave surface facing the object side and a biconcave negative lens. Overall it has positive refractive power and is fixed with respect to the image plane during zooming.

[0193] The filter fr is a plug-in rear filter.

[0194] Numerical examples of the telephoto zoom lens of each embodiment will be described below.

[0195] In [Surface Data], the surface number is the lens surface or aperture stop number counted from the object side, r is the radius of curvature of each surface, d is the spacing between each surface, nd is the refractive index for the d line (wavelength 587.56 nm), and vd is the Abbe number for the d line.

[0196] An asterisk (*) next to a surface number indicates that the lens surface is aspheric, and BF stands for back focal length.

[0197] The (diaphragm) next to a surface number indicates that an aperture diaphragm is located at that position. The radius of curvature for the plane or aperture diaphragm is marked as ∞ (infinity).

[0198] [Aspheric Data] shows the values ​​of each coefficient that gives the aspheric shape of lens surfaces marked with an * in [Surface Data]. The shape of an aspheric surface is expressed by the following formula, where y is the displacement from the optical axis in the direction perpendicular to the optical axis, z is the displacement (sag) from the intersection of the aspheric surface and the optical axis in the direction of the optical axis, r is the radius of curvature of the reference sphere, K, 4,..., and A4,..., A12 are the conic coefficients of the 12th order aspheric surface, respectively.

[0199] TIFF2025085984000002.tif16124

[0200] [Various Data] shows values ​​such as the zoom ratio and focal length at each focal length state.

[0201] [Variable Distance Data] shows the variable distance and BF values ​​for each focal length state.

[0202] [Lens Group Data] shows the surface number of each lens group closest to the object and the composite focal length of the entire lens group.

[0203] In addition, for all of the values ​​of the following specifications, the focal length f, radius of curvature r, distance d between each surface, and other lengths are expressed in millimeters (mm) unless otherwise specified; however, since the optical system can obtain the same optical performance with proportional magnification and proportional reduction, this is not limited to this.

[0204] In the longitudinal and lateral aberration diagrams corresponding to the numerical examples, d, g and C represent the d-line, g-line and C-line, respectively, and ΔS and ΔM represent the sagittal and meridional image surfaces, respectively.

[0205] Numerical Example 1 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 308.3804 12.1417 1.65844 50.88 2 -3649.7230 168.1994 3 -261.2310 3.0000 1.73037 32.23 4 -3157.1029 1.0000 5 80.5876 15.0226 1.43385 95.23 6 3261.4013 (d6) 7 305.4391 2.0001 1.59349 67.00 8 112.9881 (d8) 9 -189.4529 1.9991 1.75500 52.32 10 86.1863 3.6030 1.84666 23.78 11 120.8517 (d11) 12 123.6941 8.6585 1.43700 95.10 13 -183.0518 0.1500 14 76.9579 7.8263 1.43700 95.10 15 815.2272 0.1500 16 138.7498 1.9997 1.85150 40.78 17 46.1907 10.8594 1.43700 95.10 18 535.1939 (d18) 19(Aperture) ∞ 1.2000 20 58.7452 4.9070 1.43700 95.10 21 175.3393 (d21) 22 86.7014 3.6451 1.92119 23.96 23 111.0354 (d23) 24 213.6562 1.0000 1.92119 23.96 25 42.5990 (d25) 26 54.1558 5.3803 1.80450 39.64 27 -37.3236 0.9000 1.70154 41.15 28 204.1212 2.0000 29 109.0911 3.3758 1.85451 25.15 30 -52.7229 0.8000 1.83481 42.72 31 46.1980 2.0283 32 -540.0023 0.8000 1.75500 52.32 33 56.5343 2.0000 34 25.1774 2.2850 1.65160 58.54 35 28.1764 1.7966 36 33.6840 4.3330 1.85451 25.15 37 259.5917 1.6635 38 ∞ 0.9500 2.00069 25.46 39 20.5556 9.5810 1.64769 33.84 40 -47.2086 2.6237 41 -32.8250 1.0000 1.55032 75.50 42 21.5897 9.0130 1.72047 34.71 43 -224.5989 0.2000 44 36.8387 10.2782 1.77047 29.74 45 -25.3631 0.9500 2.00069 25.46 46 44.0298 7.2666 47 ∞ 1.5000 1.51680 64.20 48∞(BF) Image plane ∞ [Various data] Zoom ratio 1.87 Wide Angle Mid-Telephoto Focal length 309.00 409.00 579.00 F-number 4.11 4.11 4.12 Full angle of view 2ω 7.89 5.98 4.21 Image height Y 21.63 21.63 21.63 Lens total length 480.57 480.57 480.57 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d6 6.5601 17.1499 26.7034 d8 9.8426 14.5216 11.7568 d11 63.9645 39.3424 3.0000 d18 6.4240 8.5570 39.3860 d21 6.1171 16.1760 28.5622 d23 25.6542 17.4582 3.4795 d25 9.3203 14.6778 14.9950 BF 34.6000 34.6000 34.6000 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11874.6883 15849.7449 22587.8518 d6 6.5601 17.1499 26.7034 d8 9.8426 14.5216 11.7568 d11 63.9645 39.3424 3.0000 d18 6.4240 8.5570 39.3860 d21 5.5162 13.8369 22.4115 d23 27.7734 21.2121 10.9312 d25 7.8020 13.2631 13.6941 BF 34.6000 34.6000 34.6000 [Lens group data] Group Starting plane Focal length G1 1 255.94 G2 7 -303.32 G3 9 -100.06 G4 12 127.89 G5 19 199.60 G6 22 400.68 G7 24 -57.92 Group 26 201.78 G1f 1 432.39

[0206] Numerical Example 2 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 1926.2625 4.9106 1.65844 50.88 2 -596.6861 0.2000 3 150.1873 8.3355 1.43385 95.23 4 396.5474 133.7762 5 -567.9872 3.0000 1.73037 32.23 6 396.5773 1.0000 7 59.5412 9.9438 1.43700 95.10 8 -1195.3807 (d8) 9 635.2395 1.5000 1.59349 67.00 10 71.2360 (d10) 11 -131.3265 1.5000 1.75500 52.32 12 65.0793 2.8915 1.84666 23.78 13 99.2070 (d13) 14 151.4192 5.2621 1.43700 95.10 15 -98.6498 0.1500 16 91.3229 5.3563 1.43700 95.10 17 -274.2978 (d17) 18 79.2926 6.2933 1.43700 95.10 19 -97.7855 3.0000 1.85150 40.78 20 142.2616 (d20) 21(Aperture) ∞ 1.2000 22 241.4020 2.1095 1.43700 95.10 23 415.3724 0.2000 24 122.4511 3.3232 1.90110 27.06 25 331.4186 (d25) 26 -539.1737 1.0000 1.92119 23.96 27 121.6542 (d27) 28 156.8764 3.0349 1.67300 38.26 29 -50.2031 0.9000 1.92119 23.96 30 -83.0136 10.5976 31 59.6036 3.1877 1.85451 25.15 32 -77.7218 1.0000 1.83481 42.72 33 31.3590 2.5364 34 -128.8969 0.8000 1.75500 52.32 35 85.2572 2.0000 36 23.8275 3.6867 1.65160 58.54 37 29.4065 2.9424 38 30.4639 4.3782 1.85451 25.15 39 358.6765 1.4996 40 ∞ 0.9500 2.00069 25.46 41 17.1884 7.6419 1.64769 33.84 42 -68.2923 4.7703 43 -27.2679 1.0000 1.55032 75.50 44 19.9158 7.0170 1.72047 34.71 45 -125.8655 0.2000 46 40.0924 8.2849 1.77047 29.74 47 -22.3224 0.9500 2.00069 25.46 48 50.7964 10.5153 49 ∞ 1.5000 1.51680 64.20 50∞(BF) Image plane ∞ [Various data] Zoom ratio 1.92 Wide Angle Mid-Telephoto Focal length 409.00 565.00 785.00 F-number 8.20 8.22 8.21 Full angle of view 2ω 5.96 4.31 3.09 Image height Y 21.63 21.63 21.63 Lens total length 447.39 447.39 447.39 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d8 3.6396 9.4276 13.8497 d10 10.5662 8.3927 16.3762 d13 54.3574 30.5916 3.5276 d17 15.5349 18.3133 0.9767 d20 15.4658 19.2034 44.9323 d25 7.1509 4.1104 10.0950 d27 27.3775 44.0533 44.3347 BF 38.9535 38.9535 38.9535 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 15915.2631 22238.5692 31123.2403 d8 3.6396 9.4276 13.8497 d10 10.5662 8.3927 16.3762 d13 54.3574 30.5916 3.5276 d17 15.5349 18.3133 0.9767 d20 15.4658 19.2034 44.9323 d25 9.4791 6.9692 14.0741 d27 25.0493 41.1945 40.3555 BF 38.9535 38.9535 38.9535 [Lens group data] Group Starting plane Focal length G1 1 176.39 G2 9 -135.32 G3 11 -77.11 G4 14 74.06 G5 18 -224.57 G6 21 184.28 G7 26 -107.67 Gr 28 -390.39 G1f 1 306.37

[0207] Numerical Example 3 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 250.0000 12.6962 1.65844 50.88 2 3000.0194 123.8205 3 99.5913 17.5007 1.43700 95.10 4 -415.1640 3.2661 5 -234.5824 3.0000 1.58913 61.25 6 223.9424 9.4262 7 116.0390 13.9079 1.43700 95.10 8 -250.7555 (d8) 9 -5391.8278 3.0000 1.65844 50.86 10 77.5452 (d10) 11 -287.6017 4.4768 1.92119 23.96 12 -88.1507 2.5000 1.95375 32.32 13 160.6312 (d13) 14 207.2404 5.3648 1.43700 95.10 15 -218.5121 0.1500 16 156.3457 7.2177 1.43700 95.10 17 -107.7805 0.1500 18 85.8902 7.9170 1.43700 95.10 19 -103.1145 2.0000 1.95375 32.32 20 141.8206 (d20) 21(Aperture) ∞ (d21) 22 97.3957 3.7601 2.05090 26.94 23 622.1170 (d23) 24 87.2729 1.5000 2.00069 25.46 25 41.8064 (d25) 26 172.1951 1.0000 1.85883 30.00 27 26.8501 5.6111 2.00100 29.13 28 -2991.6219 2.0000 29 96.7368 2.8205 1.85451 25.15 30 -150.3475 0.8000 1.55032 75.50 31 42.9904 2.8733 32 -141.8494 0.8000 1.75500 52.32 33 60.7926 2.0000 34 27.5162 5.4374 1.65412 39.68 35 262.4088 0.2000 36 33.2352 3.2040 1.76634 35.82 37 58.7332 2.9000 38 -4199.6372 1.0000 2.05090 26.94 39 19.1235 7.5498 1.60342 38.01 40 -135.5829 8.0000 41 ∞ 1.5000 1.51680 64.20 42∞8.7026 43 -25.0794 1.0000 1.43700 95.10 44 31.0891 8.5740 1.73037 32.23 45 -55.1142 0.2000 46 108.2324 7.5171 1.58144 40.89 47 -28.1121 1.0000 2.00069 25.46 48 142.1264 (BF) Image plane ∞ [Various data] Zoom ratio 1.87 Wide Angle Mid-Telephoto Focal length 309.00 409.00 579.00 F-number 4.14 4.14 4.13 Full angle of view 2ω 7.98 6.02 4.24 Image height Y 21.63 21.63 21.63 Lens total length 464.29 464.29 464.29 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d8 3.0000 12.1383 13.4210 d10 8.8683 8.0760 27.8332 d13 69.3297 46.8023 3.4012 d20 8.9119 23.0933 45.4546 d21 5.7099 11.5892 20.6479 d23 24.1464 14.7423 6.0000 d25 11.6945 15.2193 14.9029 BF 36.2843 36.2843 36.2843 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11895.9373 15861.6722 22576.5000 d8 3.0000 12.1383 13.4210 d10 8.8683 8.0760 27.8332 d13 69.3297 46.8023 3.4012 d20 8.9119 23.0933 45.4546 d21 5.6900 10.4702 17.8998 d23 26.4611 17.7695 10.4001 d25 9.3999 13.3111 13.2509 BF 36.2843 36.2843 36.2843 [Lens group data] Group Starting plane Focal length G1 1 166.63 G2 9 -116.08 G3 11 -104.34 G4 14 182.52 G5 22 109.48 G6 24 -81.54 Gr 26 279.43 G1f 1 413.44

[0208] Numerical Example 4 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 896.6174 9.2834 1.65844 50.88 2 -773.8842 15.0000 3 228.5965 11.0086 1.49700 81.61 4 619.4330 104.7205 5 -775.1508 3.0000 1.73037 32.23 6 414.0022 1.0000 7 83.0150 15.6824 1.43700 95.10 8 1863.5145 (d8) 9 625.8318 2.0000 1.59349 67.00 10 101.2067 (d10) 11 -172.9059 1.9998 1.75500 52.32 12 82.8708 4.2654 1.84666 23.78 13 137.9177 (d13) 14 200.6601 6.9902 1.43700 95.10 15 -200.6601 0.1500 16 74.6578 8.0432 1.43700 95.10 17 621.6305 0.1500 18 117.4146 2.0000 1.85150 40.78 19 50.2339 11.2345 1.43700 95.10 20 15258.2290 (d20) 21(Aperture) ∞ 1.2000 22 83.6978 5.2456 1.43700 95.10 23 309.2614 0.2000 24 75.3719 3.8660 1.90110 27.06 25 97.0710 (d25) 26 275.3938 1.0000 1.85451 25.15 27 54.0294 (d27) 28 85.8550 5.5533 1.80450 39.64 29 -46.9887 1.0000 1.70154 41.15 30 496.1664 2.0000 31 70.7514 3.9649 1.85451 25.15 32 -95.2728 1.0000 1.83481 42.72 33 41.4020 2.9603 34 -151.5232 0.8000 1.75500 52.32 35 93.2781 2.0000 36 29.4135 4.9496 1.65160 58.54 37 63.5814 6.6935 38 41.3656 4.6858 1.85451 25.15 39 141.4357 1.9176 40 ∞ 1.0000 2.00069 25.46 41 19.9625 8.5087 1.64769 33.84 42 -74.2727 5.7328 43 -31.3011 1.0000 1.55032 75.50 44 21.7431 8.3936 1.72047 34.71 45 -141.1595 0.2000 46 51.2959 10.4356 1.77047 29.74 47 -23.4832 0.9500 2.00069 25.46 48 60.1336 6.5558 49 ∞ 1.5000 1.51680 64.20 50∞(BF) Image plane ∞ [Various data] Zoom ratio 1.87 Wide Angle Mid-Telephoto Focal length 309.00 409.00 579.00 F-number 4.11 4.13 4.14 Full angle of view 2ω 7.88 5.96 4.20 Image height Y 21.63 21.63 21.63 Lens total length 463.50 463.50 463.50 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d8 15.6086 26.0567 26.5284 d10 10.3292 12.1217 21.1241 d13 67.6815 43.6712 3.9571 d20 5.0186 10.0473 44.3408 d25 14.9944 11.2665 7.2840 d27 26.1412 36.6101 36.5389 BF 33.8845 33.8845 33.8845 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11922.0721 15934.7951 22831.4681 d8 15.6086 26.0567 26.5284 d10 10.3292 12.1217 21.1241 d13 67.6815 43.6712 3.9571 d20 5.0186 10.0473 44.3408 d25 16.6505 13.3219 10.2021 d27 24.4851 34.5547 33.6208 BF 33.8845 33.8845 33.8845 [Lens group data] Group Starting plane Focal length G1 1 226.75 G2 9 -203.71 G3 11 -105.59 G4 14 115.54 G5 21 148.19 G6 26 -78.83 Group 28 1137.66 G1f 1 340.47

[0209] Numerical Example 5 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 342.1942 7.0721 1.65844 50.88 2 -1123.0795 96.7120 3 84.3569 6.2522 1.43700 95.10 4 127.5199 6.9470 5 -785.9129 3.0000 1.73037 32.23 6 549.0677 1.0000 7 73.4814 11.5924 1.43700 95.10 8 -42527.2922 (d8) 9 172.1862 2.8116 1.59349 67.00 10 61.1641 (d10) 11 -135.6270 1.5000 1.75500 52.32 12 68.6574 3.1598 1.84666 23.78 13 103.3711 (d13) 14 180.6839 5.8065 1.43700 95.10 15 -111.1683 0.1500 16 78.0521 5.7507 1.43700 95.10 17 -592.0242 (d17) 18 67.9899 6.3323 1.43700 95.10 19 -110.9787 3.0000 1.85150 40.78 20 96.6568 (d20) 21(Aperture) ∞ 1.2000 22 147.5532 2.1192 1.43700 95.10 23 213.6147 0.2000 24 98.1524 2.2515 1.90110 27.06 25 174.5915 (d25) 26 -2602.1290 1.0000 1.92119 23.96 27 112.4259 (d27) 28 201.5283 2.8329 1.67300 38.26 29 -47.9825 1.5000 1.92119 23.96 30 -84.2728 18.7072 31 137.9760 2.9351 1.85451 25.15 32 -38.0964 0.8000 1.83481 42.72 33 37.9367 1.8085 34 -247.4698 0.8000 1.75500 52.32 35 58.7882 2.0000 36 22.1982 2.1615 1.65160 58.54 37 24.6925 1.5825 38 28.5361 4.1943 1.85451 25.15 39 348.8273 1.5056 40 ∞ 0.9500 2.00069 25.46 41 17.2356 8.8346 1.64769 33.84 42 -43.2087 2.5516 43 -29.3589 1.0000 1.55032 75.50 44 19.6764 7.3921 1.72047 34.71 45 -400.4967 0.2000 46 45.3537 9.3357 1.77047 29.74 47 -20.8158 0.9500 2.00069 25.46 48 75.9961 6.7821 49 ∞ 1.5000 1.51680 64.20 50∞(BF) Image plane ∞ [Various data] Zoom ratio 1.92 Wide Angle Mid-Telephoto Focal length 409.00 565.00 785.00 F-number 8.21 8.22 8.21 Full angle of view 2ω 5.96 4.31 3.09 Image height Y 21.63 21.63 21.63 Lens total length 438.88 438.88 438.88 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d8 12.0085 16.2288 21.2672 d10 10.1883 11.8119 13.5641 d13 61.2710 34.0762 3.8954 d17 27.2063 29.7842 18.2688 d20 19.2294 15.2192 44.2320 d25 10.7471 6.1325 3.3905 d27 15.2148 42.6125 51.2472 BF 34.8381 34.8381 34.8381 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 16011.6922 22338.5778 31193.4379 d8 12.0085 16.2288 21.2672 d10 10.1883 11.8119 13.5641 d13 61.2710 34.0762 3.8954 d17 27.2063 29.7842 18.2688 d20 19.2294 15.2192 44.2320 d25 13.5536 9.1944 7.3763 d27 12.4083 39.5505 47.2615 BF 34.8380 34.8381 34.8381 [Lens group data] Group Starting plane Focal length G1 1 155.22 G2 9 -161.36 G3 11 -79.91 G4 14 79.71 G5 18 -174.77 G6 21 200.50 G7 26 -116.97 Gr 28 -229.65 G1f 1 399.10

[0210] Numerical Example 6 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 399.4423 6.8888 1.65844 50.88 2 -1040.8294 105.3470 3 87.0559 7.1333 1.43700 95.10 4 193.2646 4.4866 5 3799.6391 3.0000 1.73037 32.23 6 188.7599 1.0000 7 86.3685 10.6749 1.43700 95.10 8 -2162.3872 (d8) 9 159.3444 1.7453 1.59349 67.00 10 54.4583 (d10) 11 -88.3013 1.5000 1.75500 52.32 12 75.6262 3.7483 1.84666 23.78 13 207.5943 (d13) 14 111.0115 6.1699 1.43700 95.10 15 -123.4365 0.1500 16 145.0404 5.0912 1.43700 95.10 17 -182.1608 0.1500 18 97.9589 6.4654 1.43700 95.10 19 -97.0370 1.5000 1.85150 40.78 20 117.0546 (d20) 21(Aperture) ∞ 2.0000 22 68.3220 2.0000 1.92119 23.96 23 53.1093 1.0989 24 67.3226 4.9270 1.87070 40.73 25 -1642.0300 (d25) 26 -342.9184 1.0000 1.48749 70.44 27 86.3576 (d27) 28 -67.4837 0.9000 1.65160 58.54 29 -171.7890 2.5820 1.60342 38.01 30 -47.4840 9.4839 31 94.9138 2.7665 1.85451 25.15 32 -73.2244 1.0000 1.83481 42.72 33 51.8196 1.4767 34 1918.4578 0.8673 1.75500 52.32 35 66.7685 2.0000 36 24.4375 3.8839 1.65160 58.54 37 97.6818 5.8865 38 30.9602 3.3466 1.61772 49.81 39 203.1533 1.5631 40 ∞ 0.9500 2.05090 26.94 41 15.1691 6.6448 1.64769 33.84 42 -108.6175 3.0232 43 -26.8285 2.0000 1.55032 75.50 44 17.1079 4.2513 1.72047 34.71 45 43.1493 2.7041 46 45.3253 7.9603 1.77047 29.74 47 -17.6336 0.9500 2.05090 26.94 48 -175.0223 10.1327 49 ∞ 1.5000 1.51680 64.20 50∞(BF) Image plane ∞ [Various data] Zoom ratio 4.23 Wide Angle Mid-Telephoto Focal length 185.40 380.00 785.00 F-number 5.76 6.81 8.39 Full angle of view 2ω 13.15 6.40 3.09 Image height Y 21.63 21.63 21.63 Lens total length 478.85 478.85 478.85 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d8 3.0000 25.4738 36.9305 d10 10.4671 17.5105 11.3121 d13 123.1873 63.7917 3.0000 d20 6.7538 44.4053 52.2288 d25 9.2335 18.1199 11.2969 d27 34.1460 17.4865 72.0196 BF 40.1124 40.1125 40.1124 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 7071.0996 14656.7217 30963.5486 d8 3.0000 25.4738 36.9305 d10 10.4671 17.5105 11.3121 d13 123.1873 63.7917 3.0000 d20 6.7538 44.4053 52.2288 d25 10.0561 20.1397 13.8010 d27 33.3234 15.4668 69.5154 BF 40.1124 40.1124 40.1124 [Lens group data] Group Starting plane Focal length G1 1 181.54 G2 9 -140.27 G3 11 -86.97 G4 14 144.66 G5 21 103.13 G6 26 -141.40 Gr 28 -95.14 G1f 1 439.24

[0211] Numerical Example 7 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 205.5470 8.1582 1.59349 67.00 2 -5066.0929 113.8473 3 -327.3713 3.0000 1.78800 47.37 4 -2087.2089 1.0000 5 70.8804 8.7731 1.43385 95.23 6 1592.2289 (d6) 7 -2934.5418 1.5000 1.63930 44.87 8 86.4212 (d8) 9 -194.6539 1.5000 1.75500 52.32 10 73.6057 3.1124 1.92119 23.96 11 117.3083 (d11) 12 171.9624 5.6700 1.43385 95.23 13 -113.5774 0.1500 14 123.5238 5.3702 1.43385 95.23 15 -187.0039 0.1500 16 79.1939 6.4847 1.43385 95.23 17 -132.0964 1.5000 1.80400 46.58 18 256.8232 (d18) 19(Aperture) ∞ 1.2000 20 42.6286 1.5028 1.43700 95.10 21 27.9179 2.3806 1.57135 52.95 22 36.1218 (d22) 23 144.7252 1.0000 1.92119 23.96 24 53.9750 (d24) 25 95.6062 3.3841 1.60342 38.03 26 -47.8972 0.9000 2.00069 25.46 27 -78.7880 2.0000 28 84.4981 2.4388 1.68893 31.16 29 -86.8367 0.8000 1.75500 52.32 30 48.4218 1.8405 31 -208.5168 0.8000 1.75500 52.32 32 88.5546 4.0278 33 237.1443 2.2256 1.51680 64.20 34 -252.2873 10.9623 35 -34.2997 1.0000 1.43700 95.10 36 83.7551 0.1000 37 68.4817 6.8333 1.56732 42.84 38 -39.0163 0.1000 39 64.6359 7.9700 1.85451 25.15 40 -32.2243 0.9000 1.96300 24.11 41 94.9330 29.4104 42 ∞ 1.5000 1.51680 64.20 43∞(BF) Image plane ∞ [Various data] Zoom ratio 2.54 Wide Angle Mid-Telephoto Focal length 309.00 490.00 785.00 F-number 8.09 8.06 8.10 Full angle of view 2ω 8.04 5.07 3.16 Image height Y 21.63 21.63 21.63 Lens total length 471.87 471.87 471.87 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d6 14.7261 24.1020 21.7050 d8 7.9149 10.3108 38.0328 d11 92.0001 54.2025 3.5345 d18 42.3297 29.6515 55.0533 d22 3.8084 12.9959 4.1302 d24 10.3351 39.8516 48.6585 BF 57.2665 57.2665 57.2665 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11942.2245 19235.4556 31313.0395 d6 14.7261 24.1020 21.7050 d8 7.9149 10.3108 38.0328 d11 92.0001 54.2025 3.5345 d18 42.3297 29.6515 55.0533 d22 5.9460 15.6449 8.1110 d24 8.1975 37.2025 44.6777 BF 57.2665 57.2665 57.2665 [Lens group data] Group Starting plane Focal length G1 1 183.69 G2 7 -131.29 G3 9 -105.12 G4 12 82.95 G5 19 -3624.00 G6 23 -93.94 Group 25 349.62 G1f 1 333.02

[0212] Numerical Example 8 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 342.9535 6.9593 1.65844 50.88 2 -1231.9673 102.8659 3 74.3323 5.5667 1.43700 95.10 4 101.2612 8.8022 5 -444.8254 3.0000 1.73037 32.23 6 2756.6186 1.0000 7 78.1770 11.5248 1.43700 95.10 8 -896.6522 (d8) 9 223.9990 1.5000 1.59349 67.00 10 65.0522 (d10) 11 -134.9075 1.5000 1.75500 52.32 12 68.9790 3.1142 1.84666 23.78 13 99.4279 (d13) 14 167.5147 5.8477 1.43700 95.10 15 -125.3067 0.1500 16 86.1804 6.4043 1.43700 95.10 17 -365.8933 (d17) 18 78.3072 6.5903 1.43700 95.10 19 -107.8277 3.0000 1.85150 40.78 20 179.1904 (d20) 21(Aperture) ∞ 1.2000 22 -100.3907 1.8337 1.43700 95.10 23 -132.7235 0.2000 24 327.3233 2.2767 1.90110 27.06 25 -1076.2996 (d25) 26 -3844.5266 1.0000 1.92119 23.96 27 107.9560 (d27) 28 124.2249 6.0509 1.67300 38.26 29 -41.4667 1.5000 1.92119 23.96 30 -75.5678 5.8201 31 129.6605 3.9910 1.85451 25.15 32 -49.1680 0.8000 1.83481 42.72 33 48.0981 1.5946 34 193.6845 0.8000 1.75500 52.32 35 44.2096 2.0000 36 25.8093 2.8102 1.65160 58.54 37 28.8248 1.6476 38 32.6930 4.9982 1.85451 25.15 39 -640.6369 1.1515 40 ∞ 0.9500 2.00069 25.46 41 18.4848 8.5745 1.64769 33.84 42 -118.8492 3.1334 43 -39.9423 1.0000 1.55032 75.50 44 21.1061 6.5025 1.72047 34.71 45 133.1516 0.2000 46 46.5045 10.6691 1.77047 29.74 47 -23.3126 0.9500 2.00069 25.46 48 95.5438 6.0232 49 ∞ 1.5000 1.51680 64.20 50∞(BF) Image plane ∞ [Various data] Zoom ratio 2.54 Wide Angle Mid-Telephoto Focal length 309.00 490.00 785.00 F-number 6.57 7.75 8.33 Full angle of view 2ω 7.92 4.97 3.09 Image height Y 21.63 21.63 21.63 Lens total length 467.57 467.57 467.57 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d8 9.5618 14.9887 20.8187 d10 9.9722 10.0803 11.1450 d13 85.7718 45.5313 3.9266 d17 24.1771 29.4115 15.9939 d20 19.2294 15.2192 44.2320 d25 6.0692 6.5094 3.0000 d27 31.1879 64.2291 86.8534 BF 34.6000 34.6000 34.6000 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11985.7436 19313.6046 31334.9593 d8 9.5618 14.9887 20.8187 d10 9.9722 10.0803 11.1450 d13 85.7718 45.5313 3.9266 d17 24.1771 29.4115 15.9939 d20 19.2294 15.2192 44.2320 d25 8.4023 9.3942 6.9735 d27 28.8549 61.3444 82.8798 BF 34.6000 34.6000 34.6000 [Lens group data] Group Starting plane Focal length G1 1 153.97 G2 9 -155.01 G3 11 -77.65 G4 14 82.01 G5 18 -359.55 G6 21 389.56 G7 26 -113.98 Group 28 -387.10 G1f 1 408.15

[0213] Numerical Example 9 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 278.2117 16.3646 1.51742 52.15 2 -1000.0000 107.0000 3 -285.0503 4.0000 1.58913 61.25 4 5358.3135 0.5000 5 90.6153 18.8457 1.43700 95.10 6 2904.6158 (d6) 7 210.8342 2.4759 1.80610 33.27 8 119.4862 (d8) 9 -134.7183 2.5000 1.69680 55.46 10 115.0237 (d10) 11 160.2499 6.5758 1.85451 25.15 12 -921.3377 2.5000 1.77047 29.74 13 199.9665 (d13) 14 155.9544 9.8593 1.43700 95.10 15 -118.1367 0.1500 16 101.7684 7.3312 1.43700 95.10 17 -1630.4433 0.1500 18 68.6294 10.1572 1.43700 95.10 19 -195.1290 2.5000 1.80610 33.27 20 70.3102 (d20) 21(Aperture) ∞ (d21) 22 91.5324 3.4332 1.85883 30.00 23 306.7548 (d23) 24 79.3150 1.5000 2.05090 26.94 25 46.5202 (d25) 26 76.1667 6.4400 1.80610 33.27 27 -30.7601 1.0000 1.80450 39.64 28 317.0395 2.0000 29 82.5677 3.2787 1.73037 32.23 30 -106.2487 0.8000 1.55032 75.50 31 40.7489 3.2984 32 -84.2074 0.8000 1.75500 52.32 33 102.0286 2.0000 34 35.7528 2.5021 1.49700 81.61 35 64.9923 1.3000 36 41.4048 1.5000 1.92119 23.96 37 23.8488 6.6531 1.61340 44.27 38 378.7108 16.0989 39 ∞ 1.5000 1.51680 64.20 40∞13.3293 41 -148.7079 1.5000 1.43700 95.10 42 25.9638 9.7357 1.64769 33.84 43 -59.6219 0.2000 44 167.3872 6.7248 1.67270 32.17 45 -36.4121 1.5000 2.05090 26.94 46 -258.0267 4.1560 47 -33.4544 1.5000 2.05090 26.94 48 -169.5667 (BF) Image plane ∞ [Various data] Zoom ratio 1.87 Wide Angle Mid-Telephoto Focal length 309.00 409.00 579.00 F-number 4.14 4.14 4.13 Full angle of view 2ω 7.94 5.99 4.24 Image height Y 21.63 21.63 21.63 Lens total length 489.28 489.28 489.28 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d6 14.8606 31.5631 47.9170 d8 34.3848 23.7515 10.6461 d10 38.3289 31.3154 3.1591 d13 29.3152 9.1662 2.0000 d20 13.2924 34.3859 66.4598 d21 5.8277 10.8663 16.1993 d23 18.7783 11.7460 3.0000 d25 14.5520 16.5457 19.9587 BF 36.2845 36.2845 36.2846 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11940.1871 15919.4748 22659.3773 d6 14.8606 31.5631 47.9170 d8 34.3848 23.7515 10.6461 d10 38.3289 31.3154 3.1591 d13 29.3152 9.1662 2.0000 d20 13.2924 34.3859 66.4598 d21 5.5573 10.3051 14.8407 d23 21.6425 15.5228 8.3456 d25 11.9582 13.3301 15.9717 BF 36.2845 36.2845 36.2846 [Lens group data] Group Starting plane Focal length G1 1 239.41 G2 7 -346.30 G3 9 -88.68 G4 11 598.38 G5 14 159.91 G6 22 150.79 G7 24 -109.63 Gr 26 1153.71 G1f 1 422.50

[0214] Numerical Example 10 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 353.1292 6.5026 1.65844 50.88 2 -1117.4136 103.4926 3 75.2157 5.5556 1.43700 95.10 4 102.9785 8.7501 5 -469.9968 3.0000 1.73037 32.23 6 1988.7956 1.0000 7 77.3542 11.5237 1.43700 95.10 8 -1041.2822 (d8) 9 237.3335 1.5013 1.59349 67.00 10 64.2402 (d10) 11 -135.0811 1.5000 1.75500 52.32 12 72.3211 3.0104 1.84666 23.78 13 104.1754 (d13) 14 155.3859 6.5320 1.43700 95.10 15 -135.4312 9.0225 16 89.0182 6.1800 1.43700 95.10 17 -345.1508 (d17) 18 78.5291 6.4960 1.43700 95.10 19 -103.3848 3.0000 1.85150 40.78 20 190.4526 (d20) 21(Aperture) ∞ 1.2000 22 -101.4344 1.8285 1.43700 95.10 23 -136.3784 0.2000 24 469.9272 2.2940 1.90110 27.06 25 -469.9406 (d25) 26 -815.7041 1.0000 1.92119 23.96 27 121.6636 (d27) 28 101.8747 4.4631 1.67300 38.26 29 -43.3986 1.5000 1.92119 23.96 30 -80.5636 5.6986 31 119.5650 3.7522 1.85451 25.15 32 -54.2207 1.0000 1.83481 42.72 33 46.1706 1.6844 34 242.8739 0.8000 1.75500 52.32 35 46.8431 2.6488 36 26.9879 3.6746 1.65160 58.54 37 29.3999 1.8624 38 33.1030 5.1638 1.85451 25.15 39 -600.2979 1.1512 40 ∞ 1.3753 2.00069 25.46 41 18.7998 9.3110 1.64769 33.84 42 -128.0053 3.1565 43 -39.5949 1.0000 1.55032 75.50 44 21.5549 6.4091 1.72047 34.71 45 179.7006 0.2000 46 50.5017 8.7021 1.77047 29.74 47 -24.6526 0.9500 2.00069 25.46 48 100.7060 (d48) 49 ∞ 1.5000 1.51680 64.20 50∞(BF) Image plane ∞ [Various data] Zoom ratio 2.54 Wide Angle Mid-Telephoto Focal length 309.00 490.00 785.00 F-number 6.39 7.66 8.22 Full angle of view 2ω 7.90 4.97 3.10 Image height Y 21.63 21.63 21.63 Lens total length 476.26 476.26 476.26 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d8 9.6263 15.3842 20.7897 d10 11.3439 10.4556 11.0361 d13 84.0042 44.5411 3.6763 d17 24.2522 28.5472 16.4343 d20 19.2294 15.2192 44.2320 d25 5.7422 6.4806 3.0000 d27 31.8972 62.9671 80.9562 d48 5.9702 8.4707 11.9410 BF 34.5999 34.5999 34.5999 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11966.4471 19315.3473 31308.2297 d8 9.6263 15.3842 20.7897 d10 11.3439 10.4556 11.0361 d13 84.0042 44.5411 3.6763 d17 24.2522 28.5472 16.4343 d20 19.2294 15.2192 44.2320 d25 8.1835 9.4252 6.9703 d27 29.4560 60.0225 76.9859 d48 5.9702 8.4707 11.9410 BF 34.5999 34.5999 34.5999 [Lens group data] Group Starting plane Focal length G1 1 154.34 G2 9 -148.89 G3 11 -79.75 G4 14 85.45 G5 18 -371.74 G6 21 361.19 G7 26 -114.87 Gr 28 -514.23 G1f 1 408.24

[0215] Numerical Example 11 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 480.4814 9.1865 1.65844 50.86 2 -3601.8351 8.5320 3 207.7729 11.5068 1.43385 95.23 4 663.1847 95.0167 5 95.4334 8.5152 1.43700 95.10 6 130.9898 10.5135 7 294.1774 3.1464 1.73037 32.23 8 110.1009 1.0000 9 75.1546 14.8614 1.43700 95.10 10 3663.2470 (d10) 11 -3008.3343 1.9999 1.59349 67.00 12 69.7806 (d12) 13 -158.5516 1.9999 1.75500 52.32 14 112.8870 4.7815 1.84666 23.78 15 384.9032 (d15) 16 225.8322 6.7267 1.43700 95.10 17 -201.9352 5.2281 18 194.1023 8.3631 1.43700 95.10 19 -144.0931 0.1500 20 122.4028 9.7780 1.43700 95.10 21 -113.2253 2.0000 1.85150 40.78 22 1092.4344 (d22) 23(Aperture) ∞ 1.8915 24 122.0196 3.3915 1.43700 95.10 25 309.3819 0.2178 26 81.5515 3.0713 1.89190 37.13 27 122.5713 (d27) 28 257.2547 1.0000 1.85478 24.80 29 55.8428 (d29) 30 105.6837 5.7910 1.80450 39.64 31 -45.9501 0.9000 1.70154 41.15 32 -609.6345 (d32) 33 44.0206 3.6708 1.85451 25.15 34 -264.4793 0.8000 1.82080 42.71 35* 36.9693 2.8821 36 -231.7817 0.8000 1.75500 52.32 37 40.5913 2.0000 38 29.5496 5.6642 1.65160 58.54 39 139.3026 0.2000 40 48.7902 4.0812 1.85451 25.15 41 105.4440 5.1468 42 ∞ 1.0000 2.00069 25.46 43 18.6418 8.2271 1.64769 33.84 44 -72.5015 2.8418 45 -36.6547 1.0000 1.55032 75.50 46 23.1445 7.0797 1.72047 34.71 47 -374.8219 0.2000 48 80.9709 7.7465 1.77047 29.74 49 -24.9849 0.9500 2.00069 25.46 50 149.5518 5.6500 51∞ 1.5000 1.51680 64.20 52∞(BF) Image plane ∞ [Aspheric data] 35 sides K 0.00000 A4 -1.16469E-06 A6 -1.17638E-09 A8 -5.26393E-13 [Various data] Zoom ratio 1.87 Wide Angle Mid-Telephoto Focal length 309.00 470.87 579.00 F-number 4.13 4.10 4.11 Full angle of view 2ω 7.89 5.17 4.20 Image height Y 21.63 21.63 21.63 Lens total length 454.85 454.85 454.85 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d10 3.2481 15.9458 18.6805 d12 12.2374 15.8119 17.2718 d15 59.4545 21.9875 3.0000 d22 5.2569 26.4516 41.2446 d27 13.8064 6.8671 5.4708 d29 32.2289 43.3155 51.5687 d32 13.0042 8.8569 2.0000 BF 34.6000 34.6000 34.6000 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11961.3586 18398.4998 22707.3668 d10 3.2481 15.9458 18.6805 d12 12.2374 15.8119 17.2718 d15 59.4545 21.9875 3.0000 d22 5.2569 26.4516 41.2446 d27 15.2980 8.8089 7.8982 d29 30.2844 40.3857 48.2281 d32 13.4571 9.8449 2.9133 BF 34.6000 34.6000 34.6000 [Lens group data] Group Starting plane Focal length G1 1 206.50 G2 11 -114.88 G3 13 -161.82 G4 16 115.41 G5 23 167.73 G6 28 -83.63 G7 30 91.62 Group 33 -58.36 G1f 1 336.17

[0216] Numerical Example 12 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 404.6267 10.1334 1.65844 50.88 2 -3831.7856 0.5000 3 252.2980 11.4716 1.43385 95.23 4 1017.5168 91.9969 5 86.2041 6.7519 1.43700 95.10 6 115.4236 7.9478 7 411.5948 3.0000 1.73037 32.23 8 125.7737 1.0000 9 79.7197 14.3844 1.43700 95.10 10 843.9377 (d10) 11 588.4911 1.9999 1.59349 67.00 12 73.7950 (d12) 13 -190.7125 1.9998 1.75500 52.32 14 90.8758 4.7609 1.84666 23.78 15 201.9207 (d15) 16 196.7784 6.7361 1.43700 95.10 17 -231.1870 0.1500 18 145.2225 8.0467 1.43700 95.10 19 -184.1237 0.1500 20 100.3010 10.1152 1.43700 95.10 21 -134.3077 1.9999 1.85150 40.78 22 643.1694 (d22) 23(Aperture) ∞ 5.2896 24 95.4347 5.1536 1.43700 95.10 25 857.8402 0.2000 26 82.8474 3.3667 1.90110 27.06 27 89.7760 (d27) 28 -702.8285 1.0000 1.85451 25.15 29 67.1564 (d29) 30 168.1702 5.0792 1.80450 39.64 31 -40.5788 1.0000 1.70154 41.15 32 -160.2239 3.1286 33 67.9686 3.7928 1.85451 25.15 34 -97.8213 1.0000 1.83481 42.72 35 40.6889 2.5950 36 -206.4650 0.8000 1.75500 52.32 37 70.6192 2.0000 38 26.6306 4.8077 1.65160 58.54 39 50.0569 2.6880 40 40.2573 4.6375 1.85451 25.15 41 142.2125 3.5545 42 ∞ 1.0000 2.00069 25.46 43 17.6564 8.4039 1.64769 33.84 44 -66.8099 4.3169 45 -27.8712 1.0000 1.55032 75.50 46 21.6406 7.9627 1.72047 34.71 47 -179.9346 0.2000 48 52.8552 10.6761 1.77047 29.74 49 -22.3760 0.9500 2.00069 25.46 50 99.4572 5.9810 51∞ 1.5000 1.51680 64.20 52∞(BF) Image plane ∞ [Various data] Zoom ratio 1.87 Wide Angle Mid-Telephoto Focal length 309.00 468.15 579.00 F-number 4.16 4.17 4.19 Full angle of view 2ω 7.90 5.20 4.20 Image height Y 21.63 21.63 21.63 Lens total length 453.46 453.46 453.46 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d10 8.7382 14.8139 13.3515 d12 11.7251 34.4996 52.0309 d15 78.0111 31.3571 3.0000 d22 5.7022 23.5061 35.7942 d27 15.1860 9.5160 9.5588 d29 24.2651 29.9351 29.8922 BF 34.6000 34.6000 34.6000 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11945.2658 18303.7890 22836.0851 d10 8.7382 14.8139 13.3515 d12 11.7251 34.4996 52.0309 d15 78.0111 31.3571 3.0000 d22 5.7022 23.5061 35.7942 d27 16.7907 11.8718 12.4756 d29 22.6603 27.5793 26.9754 BF 34.6000 34.6000 34.6000 [Lens group data] Group Starting plane Focal length G1 1 214.12 G2 11 -142.37 G3 13 -139.09 G4 16 103.06 G5 23 193.59 G6 28 -71.69 Gr 30 505.75 G1f 1 323.78

[0217] Numerical Example 13 Unit: mm [Face data] Surface number rd nd vd Object surface ∞ (d0) 1 246.1490 10.5674 1.66672 48.32 2 808.5325 0.5000 3 256.0515 10.3600 1.43385 95.23 4 1098.7832 95.2385 5 179.6273 6.6172 1.43700 95.10 6 399.7019 13.0690 7 -2414.9230 3.0000 1.73037 32.23 8 144.2653 1.0000 9 72.5793 14.5347 1.43700 95.10 10 916.1688 (d10) 11 -798.8116 1.9999 1.60311 60.64 12 68.6859 (d12) 13 -598.1034 1.9995 1.75500 52.32 14 92.8578 4.9572 1.92119 23.96 15 230.8275 (d15) 16 235.1517 4.4980 1.43700 95.10 17 -5192.6122 0.1500 18 145.5140 9.5038 1.43700 95.10 19 -118.5206 0.1500 20 137.3500 9.9066 1.43700 95.10 21 -104.3365 1.9996 1.85150 40.78 22 -4843.5303 (d22) 23(Aperture) ∞ 1.2000 24 99.5571 3.4516 1.43700 95.10 25 224.3639 0.2003 26 63.7225 3.1411 1.89190 37.13 27 86.0013 (d27) 28 190.1783 1.0000 1.96300 24.11 29 52.8549 (d29) 30 117.7347 7.3832 1.80440 39.58 31 -40.7972 0.9000 1.76684 46.78 32 -215.9869 (d32) 33 36.1154 4.0126 1.85451 25.15 34 338.3700 0.8000 1.82080 42.71 35* 34.5629 3.3591 36 -249.5775 0.8000 1.75500 52.32 37 32.3152 2.0000 38 29.2974 5.3638 1.65160 58.54 39 770.6298 0.2000 40 44.3154 2.8001 1.85451 25.15 41 78.8198 2.5233 42 ∞ 0.9500 2.00069 25.46 43 19.6362 9.5956 1.64769 33.84 44 -46.4945 2.4578 45 -33.1428 1.0000 1.55032 75.50 46 21.7541 10.0013 1.72047 34.71 47 -38.6436 0.2000 48 -50.1243 5.7169 1.77047 29.74 49 -20.3455 0.9500 2.00069 25.46 50 278.0263 5.6492 51∞ 1.5000 1.51680 64.20 52∞(BF) Image plane ∞ [Aspheric data] 35 sides K 0.00000 A4 -2.32586E-06 A6 -3.73048E-09 A8 6.48941E-13 A10 -2.13024E-14 A12 3.12177E-17 [Various data] Zoom ratio 1.87 Wide Angle Mid-Telephoto Focal length 309.00 483.00 579.00 F-number 4.11 4.13 4.14 Full angle of view 2ω 7.89 5.04 4.20 Image height Y 21.63 21.63 21.63 Lens total length 451.46 451.46 451.46 [Variable interval data] Focusing at infinity Wide Angle Mid-Telephoto d0∞∞∞∞ d10 4.5597 20.9195 22.8196 d12 10.8460 11.4681 16.4553 d15 62.1280 23.5054 3.0000 d22 4.9418 26.5825 40.2005 d27 8.3267 7.8223 7.8115 d29 35.8612 50.9536 57.3665 d32 22.9901 8.4021 2.0000 BF 34.6008 34.6008 34.6008 When the shooting magnification is 40x Wide Angle Mid-Telephoto d0 11994.7788 18880.9840 22668.6274 d10 4.5597 20.9195 22.8196 d12 10.8460 11.4681 16.4553 d15 62.1280 23.5054 3.0000 d22 4.9418 26.5825 40.2005 d27 9.7116 9.5807 9.8124 d29 33.9763 48.1051 54.0775 d32 23.4901 9.4922 3.2881 BF 34.6008 34.6008 34.6008 [Lens group data] Group Starting plane Focal length G1 1 238.17 G2 11 -104.78 G3 13 -288.92 G4 16 122.24 G5 23 158.01 G6 28 -76.28 G7 30 89.57 Group 33 -56.98 G1f 1 314.04

[0218] Also shown is a list of values ​​corresponding to the conditional expressions in each of these embodiments.

[0219] [Conditional expression corresponding value] Conditional Expression Example 1 Example 2 Example 3 Example 4 (1) LT / ft 0.83 0.57 0.80 0.80 (2) d1 / LT 0.35 0.30 0.27 0.23 (3) f1f / f1 1.69 1.74 2.48 1.50 (4) f1 / ft 0.44 0.22 0.29 0.39 (5) SG1fp 3.50 3.50 / 3.70 3.50 3.50 / 3.70 (6) νd1fp 50.88 50.88 / 95.23 50.88 50.88 / 81.62 (7) f2 / ft -0.52 -0.17 -0.20 -0.35 (8) f3 / ft -0.17 -0.10 -0.18 -0.18 (9) EXP / LT Wide-angle end 0.18 0.20 0.18 0.19 Mid zoom position 0.19 0.21 0.18 0.19 Telephoto end 0.19 0.22 0.18 0.19 (10)|βTosb×(1-βTos)| 2.00 2.53 2.00 2.00 (11) Ds / LT 0.33 0.36 0.34 0.36 (12) 2ωw 7.89 5.96 7.98 7.88 (13)2ωt 4.21 3.09 4.24 4.20 Conditional Expression Example 5 Example 6 Example 7 Example 8 (1) LT / ft 0.56 0.61 0.60 0.60 (2) d1 / LT 0.22 0.22 0.24 0.22 (3) f1f / f1 2.57 2.42 1.81 2.65 (4) f1 / ft 0.20 0.23 0.23 0.20 (5) SG1fp 3.50 3.50 3.28 3.50 (6) νd1fp 50.88 50.88 67.00 50.88 (7) f2 / ft -0.21 -0.18 -0.17 -0.20 (8) f3 / ft -0.10 -0.11 -0.13 -0.10 (9) EXP / LT Wide-angle end 0.20 0.20 0.32 0.18 Mid zoom position 0.21 0.19 0.45 0.20 Telephoto end 0.22 0.21 0.45 0.21 (10)|βTosb×(1-βTos)| 2.42 2.00 2.00 2.00 (11) Ds / LT 0.34 0.36 0.33 0.32 (12) 2ωw 5.96 13.15 8.04 7.92 (13)2ωt 3.09 3.09 3.16 3.09 Conditional Expression Example 9 Example 10 Example 11 Example 12 (1) LT / ft 0.85 0.61 0.79 0.78 (2) d1 / LT 0.22 0.22 0.21 0.20 (3) f1f / f1 1.76 2.64 1.63 1.51 (4) f1 / ft 0.41 0.20 0.36 0.37 (5) SG1fp 2.43 3.50 3.64 / 3.18 3.50 / 3.18 (6) νd1fp 52.15 50.88 50.86 / 95.23 50.88 / 95.23 (7) f2 / ft -0.60 -0.19 -0.20 -0.25 (8) f3 / ft -0.15 -0.10 -0.28 -0.24 (9) EXP / LT Wide-angle end 0.17 0.18 0.20 0.20 Mid zoom position 0.17 0.20 0.20 0.20 Telephoto end 0.17 0.22 0.21 0.20 (10)|βTosb×(1-βTos)| 2.00 2.19 2.00 2.00 (11) Ds / LT 0.34 0.32 0.38 0.37 (12) 2ωw 7.94 7.90 7.89 7.90 (13)2ωt 4.24 3.10 4.20 4.20 Conditional Expression Example 13 (1) LT / ft 0.78 (2) d1 / LT 0.21 (3) f1f / f1 1.32 (4) f1 / ft 0.41 (5) SG1fp 3.59 / 3.18 (6) νd1fp 48.32 / 95.23 (7) f2 / ft -0.18 (8) f3 / ft -0.50 (9) EXP / LT Wide-angle end 0.19 Mid zoom position 0.20 Telephoto end 0.21 (10)|βTosb×(1-βTos)| 2.00 (11) Ds / LT 0.40 (12) 2ωw 7.89 (13)2ωt 4.20

[0220] The present technology can also be configured as follows. [Section 1] A telephoto zoom lens comprising, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group Gm, and a final lens group Gr, wherein during zooming from the wide-angle end to the telephoto end, the first lens group G1 is fixed with respect to the image plane, and the spacing between adjacent lens groups changes, and focusing is performed from an object distance of infinity to a close distance by moving a part or a plurality of lens groups within the intermediate lens group Gm, the first lens group G1 comprising a front sub-lens group G1f located on the object side and a rear sub-lens group G1r located on the image side, and wherein the following conditional expression is satisfied: LT / ft < 0.93 (1) 0.17 < d1 / LT < 0.45 (2) however, LT is the distance on the optical axis from the surface closest to the object to the image plane in the entire lens system. ft is the focal length of the entire lens system when focused at infinity at the telephoto end, d1 is the distance from the surface of the front sub-lens group G1f closest to the image side to the surface of the rear sub-lens group G1r closest to the object side. [Section 2] The telephoto zoom lens according to [Item 1], characterized in that the following conditional expression is satisfied: 1.01 < f1f / f1 < 3.45 (3) however, f1f is the focal length of the front sub-lens group G1f, f1 is the focal length of the first lens group G1. [Section 3] The telephoto zoom lens according to item 1 or 2, wherein the first lens group G1 satisfies the following conditional expression: 0.15 < f1 / ft < 0.57 (4) however, f1 is the focal length of the first lens group G1. [Section 4] The telephoto zoom lens according to any one of [Item 1] to [Item 3], wherein the first lens group G1 is composed of five or less lens elements. [Section 5] The telephoto zoom lens according to any one of [Item 1] to [Item 4], wherein the front sub-lens group G1f includes at least one positive lens element that satisfies the following conditional expression: SG1fp < 4.00 (5) 45.00 < νd1fp (6) however, SG1fp is the specific gravity of the positive lens element, νd1fp is the Abbe number of the positive lens element. [Section 6] The telephoto zoom lens described in any one of [Item 1] to [Item 5] is characterized in that a second lens group G2 having negative refractive power is disposed closest to the object side of the intermediate lens group Gm, and the following conditional expression is satisfied: -0.78 < f2 / ft < -0.13 (7) however, f2 is the focal length of the second lens group G2. [Section 7] The telephoto zoom lens described in [Item 6] is characterized in that the intermediate lens group Gm has a third lens group G3 having negative refractive power arranged adjacent to the image side of the second lens group G2, and the following conditional expression is satisfied: -0.65 < f3 / ft < -0.07 (8) however, f3 is the focal length of the third lens group G3. [Section 8] The telephoto zoom lens according to any one of [Item 1] to [Item 7], characterized in that the following conditional expression is satisfied: 0.13 < EXP / LT < 0.75 (9) however, EXP is the distance from the exit pupil to the image plane when focusing on infinity at the wide-angle end over the entire zoom range from the wide-angle end to the telephoto end. [Section 9] The telephoto zoom lens described in any one of [Item 1] to [Item 8] is characterized in that the final lens group Gr has an image stabilization lens group Gos that performs image stabilization by moving a part of it in a substantially vertical direction, and the following conditional expression is satisfied: 1.54 < |βTosb×(1-βTos)| < 3.30 (10) however, βTosb is the lateral magnification of the lens group disposed on the image side of the image stabilization lens group Gos when focusing on infinity at the telephoto end, βTos is the lateral magnification of the image stabilization lens group Gos when focusing on infinity at the telephoto end. [Section 10] The telephoto zoom lens according to [Item 6], wherein the second lens group G2 is composed of one negative lens element. [Section 11] The telephoto zoom lens described in any one of [Item 1] to [Item 10] is characterized in that it has an aperture stop S and performs focusing from an object distance of infinity to a close distance by moving at least one lens group arranged on the image side of the aperture stop S. [Section 12] The telephoto zoom lens according to [Item 11], characterized in that the following conditional expression is satisfied: 0.24 < Ds / LT < 0.52 (11) however, Ds is the distance from the aperture stop S to the image plane at the wide-angle end. [Section 13] The telephoto zoom lens according to any one of [Item 1] to [Item 12], wherein one or two of the lens groups that move during focusing are made of a single lens element. [Section 14] The telephoto zoom lens according to any one of [Item 1] to [Item 13], characterized in that it does not include a diffractive optical element.

[0221] The above embodiment has been described as an example of the telephoto zoom lens of the present invention, and the present invention is not limited to this embodiment without departing from the spirit of the present invention. Various design changes, modifications, combinations, and sub-combinations are possible, and all of them are within the scope of the equivalents of the present invention. [Explanation of symbols]

[0222] G1 First lens group Gm Intermediate lens group Gr Final lens group G2 2nd lens group G3 3rd lens group G4 4th lens group G5 5th lens group G6 6th lens group G7 7th lens group G1f front sub-lens group G1r rear sub-lens group Gos Image Stabilization Lenses S aperture stop fr filter

Claims

1. A telephoto zoom lens comprising, in order from the object side to the image side, a first lens group G1 having positive refractive power, an intermediate lens group Gm, and a final lens group Gr, wherein during zooming from the wide-angle end to the telephoto end, the first lens group G1 is fixed with respect to the image plane, and the spacing between adjacent lens groups changes, and focusing is performed from an object distance of infinity to a close distance by moving a part or a plurality of lens groups within the intermediate lens group Gm, the first lens group G1 comprising a front sub-lens group G1f located on the object side and a rear sub-lens group G1r located on the image side, and wherein the following conditional expression is satisfied: LT / ft < 0.93 (1) 0.17 < d1 / LT < 0.45 (2) however, LT is the distance on the optical axis from the surface closest to the object in the entire lens system to the image plane, ft is the focal length of the entire lens system when focused at infinity at the telephoto end, d1 is the distance from the surface of the front sub-lens group G1f closest to the image side to the surface of the rear sub-lens group G1r closest to the object side.

2. 2. The telephoto zoom lens according to claim 1, wherein the following condition is satisfied: 1.01 < f1f / f1 < 3.45 (3) however, f1f is the focal length of the front sub-lens group G1f, f1 is the focal length of the first lens group G1.

3. 2. The telephoto zoom lens according to claim 1, wherein the first lens group G1 satisfies the following condition: 1 / (f1 / f2)<f1 / f2. 0.15 < f1 / ft < 0.57 (4) however, f1 is the focal length of the first lens group G1.

4. 2. The telephoto zoom lens according to claim 1, wherein the first lens group G1 is composed of five or less lens elements.

5. 2. The telephoto zoom lens according to claim 1, wherein the front sub-lens group G1f includes at least one positive lens element that satisfies the following condition: SG1fp < 4.00 (5) 45.00 < νd1fp (6) however, SG1fp is the specific gravity of the positive lens element, νd1fp is the Abbe number of the positive lens element.

6. 2. The telephoto zoom lens according to claim 1, further comprising a second lens group G2 having negative refractive power disposed closest to the object side of said intermediate lens group Gm, and satisfying the following condition: -0.78 < f2 / ft < -0.13 (7) however, f2 is the focal length of the second lens group G2.

7. 7. The telephoto zoom lens according to claim 6, wherein the intermediate lens group Gm has a third lens group G3 having negative refractive power arranged adjacent to the image side of the second lens group G2, and the following condition is satisfied: -0.65 < f3 / ft < -0.07 (8) however, f3 is the focal length of the third lens group G3.

8. 2. The telephoto zoom lens according to claim 1, wherein the following condition is satisfied: 0.13 < EXP / LT < 0.75 (9) however, EXP is the distance from the exit pupil to the image plane when focusing on infinity at the wide-angle end over the entire zoom range from the wide-angle end to the telephoto end.

9. 2. The telephoto zoom lens according to claim 1, wherein the final lens group Gr has an image stabilizing lens group Gos that performs image stabilization by moving a part of the lens group Gr in a substantially vertical direction, and the following condition is satisfied: 1.54 < |βTosb×(1-βTos) | < 3.30 (10) however, βTosb is the lateral magnification of the lens group disposed on the image side of the image stabilization lens group Gos when focusing on infinity at the telephoto end, βTos is the lateral magnification of the image stabilization lens group Gos when focusing on infinity at the telephoto end.

10. 7. The telephoto zoom lens according to claim 6, wherein the second lens group G2 is composed of one negative lens element.

11. 2. The telephoto zoom lens according to claim 1, further comprising an aperture stop S, and wherein focusing is performed from an object distance of infinity to a close distance by moving at least one lens group disposed closer to the image side than the aperture stop S.

12. 12. The telephoto zoom lens according to claim 11, wherein the following condition is satisfied: 0.24 < Ds / LT < 0.52 (11) however, Ds is the distance from the aperture stop S to the image plane at the wide-angle end.

13. 2. The telephoto zoom lens according to claim 1, wherein one or two of the lens groups which move during focusing are composed of a single lens element.

14. 2. The telephoto zoom lens of claim 1, which does not include a diffractive optical element.

Images