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Zoom lens and camera

A zoom lens, focal length technology, applied in optical components, instruments, optics, etc., can solve the problem that the performance of correction cannot be said to be sufficient.

Active Publication Date: 2020-09-15
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the zoom lenses of Patent Documents 1 to 3 can be said to have sufficient performance in correcting various aberrations.

Method used

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  • Zoom lens and camera
  • Zoom lens and camera
  • Zoom lens and camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] In the zoom lens of Example 1, the first lens group G1 is composed of three lenses, lenses L1A to L1C, the second lens group G2 is composed of five lenses, lenses L2A to L2E, and the third lens group G3 is composed of lenses L3A to L3E. These five lenses constitute the fourth lens group G4 consisting of four lenses L4A-L4D, the fifth lens group G5 consisting of three lenses L5A-L5C, and the sixth lens group G6 consisting of one lens L6A.

[0158] The second lens group G2 is composed of the 2F lens group G2F and the 2R lens group G2R in order from the object side. The cemented lens formed by cementing lens L2B is constituted, and the second R lens group G2R is composed of a cemented lens formed by cementing negative lens L2C and positive lens L2D in order from the object side, and a negative single lens L2E.

[0159] Table 1 shows the basic lens data of the zoom lens of Example 1, Table 2 shows the data related to various factors, and Table 3 shows the data related to th...

Embodiment 2

[0183] Example 2 Lens data

[0184] face number radius of curvature face spacing nd vd θgF 1 258.99426 2.220 1.83481 42.72 0.56486 2 105.99457 8.370 1.49700 81.54 0.53748 3 -813.40013 0.150 4 96.96234 8.250 1.43875 94.66 0.53402 5 -12541.90626 DD[5] 6 -228.16128 3.720 1.60562 43.71 0.57214 7 -38.90795 1.000 1.75500 52.32 0.54765 8 -80.70102 2.300 9 -168.51961 1.010 1.59522 67.73 0.54426 10 24.91505 3.114 1.78470 26.29 0.61360 11 44.46548 2.958 12 -68.97092 1.000 1.81600 46.62 0.55682 13 198.22555 DD[13] 14 70.13675 5.340 1.58913 61.13 0.54067 15 -44.50451 0.150 16 38.68170 6.653 1.49700 81.54 0.53748 17 -33.05588 1.000 1.90043 37.37 0.57720 18 138.23933 0.668 19 29.56207 6.760 1.58267 46.42 0.56716 20 -27.52545 1.000 1.51742 52.43 0.55649 21 21.28674 2.73...

Embodiment 3

[0193] Example 3 Lens data

[0194] face number radius of curvature face spacing nd vd θgF 1 262.40932 2.220 1.83481 42.72 0.56486 2 105.54031 8.384 1.49700 81.54 0.53748 3 -733.03668 0.150 4 95.96727 7.808 1.43387 95.18 0.53733 5 -15644.45936 DD[5] 6 -228.28533 3.522 1.58267 46.42 0.56716 7 -38.72547 0.900 1.69680 55.53 0.54341 8 -85.18699 2.301 9 -172.24235 0.910 1.59522 67.73 0.54426 10 23.88538 3.576 1.78470 26.29 0.61360 11 46.63101 2.720 12 -78.62778 0.900 1.83481 42.72 0.56486 13 120.57303 DD[13] 14 62.51644 5.042 1.60311 60.64 0.54148 15 -44.95879 0.150 16 37.70765 6.383 1.49700 81.54 0.53748 17 -32.17618 0.800 1.90043 37.37 0.57720 18 122.86192 1.690 19 28.87948 6.260 1.58267 46.42 0.56716 20 -26.63471 0.800 1.51742 52.43 0.55649 21 20.72606 2.74...

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PUM

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Abstract

Provided are a zoom lens in which various aberrations are well corrected, and an imaging device including the zoom lens. The zoom lens consists of a positive first lens group (G1), a negative second lens group (G2), a positive third lens group (G3), a positive fourth lens group (G4), and a negative The 5th lens group (G5) and the positive 6th lens group (G6) constitute. When zooming from the wide-angle end to the telephoto end, the distance between adjacent lens groups changes. The first lens group (G1) The second lens group (G2) consists of a negative lens, a positive lens, and a positive lens in order from the object side. The second lens group (G2) is composed of a cemented lens and a negative single lens in order from the object side and has a negative single lens as a whole. The 2nd R lens group (G2R) of negative refractive power, and the 5th lens group (G5) consist of a negative lens, a negative lens, and a positive lens in order from the object side.

Description

technical field [0001] In particular, the present invention relates to a zoom lens suitable for a digital video camera, a lens interchangeable digital video camera, a video camera, etc., and an imaging device equipped with the zoom lens. Background technique [0002] As a zoom lens used in a digital video camera, a lens interchangeable digital video camera, a movie camera, etc., those described in Patent Documents 1 to 3 are known. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: JP-A-2013-97322 [0006] Patent Document 2: JP Unexamined Publication No. 2014-209144 [0007] Patent Document 3: Specification of IP Patent No. 4585776 [0008] In recent years, digital video cameras, lens interchangeable digital video cameras, video cameras, and the like have been promoted to increase in pixels, and the zoom lenses used in these cameras are also required to be well compensated for the high pixels of various aberrations corresponding to the hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/173
CPCG02B15/1461G02B27/0025G02B27/646G02B5/005
Inventor 野田大雅
Owner FUJIFILM CORP