Zoom lens and camera

一种变焦透镜、透镜的技术，应用在光学元件、仪器、光学等方向，能够解决像差像差变动的性能不够充分、像差变动的性能不够充分等问题，达到F值小、像差变动少的效果

Active Publication Date: 2019-11-19
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the zoom lenses of Patent Documents 1 to 3 all have large F-numbers on the telephoto side, and have insufficient performance regarding correction of various aberrations and fluctuations in aberrations during focusing.
In addition, although the zoom lens of Patent Document 4 has a small F-number in the entire zoom range, its performance regarding correction of various aberrations and fluctuations in aberrations during focusing is not sufficient.

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

[0160] Example 1 Lens data

[0161] face number radius of curvature face spacing nd vd 1 86.20982 2.210 1.84666 23.78 2 54.35200 6.000 1.61800 63.33 3 139.31177 0.100 4 53.19269 6.340 1.75500 52.32 5 200.56627 DD[5] *6 141.91654 1.400 1.85135 40.10 *7 13.47772 8.570 8 -32.15762 1.010 1.69680 55.53 9 17.98900 7.500 1.90366 31.31 10 -39.71555 1.380 11 -21.64392 1.000 1.72916 54.68 12 -56.68875 DD[12] *13 27.66531 4.000 1.68458 30.88 *14 -787.32682 2.000 15 (aperture stop) ∞ 3.440 16 35.85993 1.010 1.84666 23.78 17 15.92500 6.280 1.53775 74.70 18 -48.19335 0.500 19 396.51587 3.510 1.49700 81.54 20 -39.57800 0.800 1.79952 42.22 21 31.95551 1.810 *22 20.62352 5.760 1.61882 63.58 *23 -26.89463 DD[23] 24 ∞ 0.800 1.61800 63.33 25 22.13057 2.050 ...

Embodiment 2

[0176] Example 2 Lens data

[0177] face number radius of curvature face spacing nd vd 1 69.44254 1.810 1.84661 23.88 2 48.31867 6.000 1.61800 63.33 3 95.72888 0.100 4 49.20902 6.512 1.75500 52.32 5 154.36104 DD[5] *6 166.66082 2.000 1.85135 40.10 *7 12.87033 8.647 8 -37.26424 1.010 1.69680 55.53 9 16.63285 7.779 1.90366 31.31 10 -47.15324 1.412 11 -23.28964 1.000 1.72916 54.68 12 -53.90192 DD[12] *13 32.79803 4.000 1.68893 31.16 *14 -435.72457 2.000 15 (aperture stop) ∞ 3.250 16 25.23382 1.010 1.92286 18.90 17 17.17597 6.399 1.49700 81.54 18 -36.90322 0.500 19 -105.78645 3.510 1.49700 81.54 20 -20.26114 0.800 1.79952 42.22 21 27.63093 1.254 *22 18.78974 6.322 1.62087 63.88 *23 -21.61987 DD[23] 24 972.23964 0.800 1.61800 63.33 25 21.08780 1.955...

Embodiment 3

[0190] Example 3 Lens data

[0191] face number radius of curvature face spacing nd vd 1 76.44802 1.810 1.84661 23.88 2 51.56054 6.024 1.61800 63.33 3 119.04201 0.100 4 55.79377 6.072 1.75500 52.32 5 205.02447 DD[5] *6 151.44478 2.000 1.85135 40.10 *7 13.37604 8.454 8 -37.83715 1.010 1.69680 55.53 9 17.12431 7.893 1.90366 31.31 10 -41.50609 1.205 11 -23.85142 1.000 1.72916 54.68 12 -96.38918 DD[12] *13 30.53747 4.000 1.68893 31.16 *14 -577.09433 2.000 15 (aperture stop) ∞ 3.652 16 30.40620 1.010 1.92286 18.90 17 19.31761 6.246 1.49700 81.54 18 -33.00050 0.500 19 -422.28074 3510 1.49700 81.54 20 -23.67547 0.800 1.79952 42.22 21 31.29122 1.671 *22 19.74958 5.839 1.62087 63.88 *23 -26.27159 DD[23] 24 -736.81576 0.800 1.61800 63.33 25 21.29420 2.23...

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PUM

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Abstract

A zoom lens includes, in order from the object side: a positive first lens group; a negative second lens group; a positive third lens group; a negative fourth lens group; and a positive fifth lens group. The distance between the first and second lens groups constantly increases, the distance between the second and third lens groups constantly decreases, the distance between the third and fourth lens groups constantly changes, and the distance between the fourth and fifth lens groups constantly increases when changing magnification from the wide angle to the telephoto end. The first lens group includes, in order from the object side, a negative lens, a positive lens, and a positive lens. The fourth lens group includes, in order from the object side, a negative lens, a negative lens, and a positive lens, and moves toward the image side when focusing from a far distance to a close distance.

Description

technical field [0001] The present invention relates to a zoom lens particularly suitable for a digital camera, a lens interchangeable digital camera, a camera for cinematography, and the like, and an imaging device including the zoom lens. Background technique [0002] The lenses described in Patent Documents 1 to 4 are known as five-unit zoom lenses used in digital cameras, interchangeable lens digital cameras, cinematography cameras, and the like. [0003] prior art literature [0004] Patent Document 1: Japanese Patent Laid-Open No. 2003-287681 [0005] Patent Document 2: Japanese Patent Laid-Open No. 61-286813 [0006] Patent Document 3: Japanese Patent Laid-Open No. 2014-102526 [0007] Patent Document 4: Japanese Patent Laid-Open No. 2013-182246 [0008] In recent years, digital cameras, digital cameras with interchangeable lenses, cameras for cinematography, etc. have been increasing in pixels, and zoom lenses used in these cameras are also required to be well co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/173
CPCG02B15/163G02B15/173G02B15/20G02B15/145121G02B27/0025
Inventor 野田大雅长伦生
Owner FUJIFILM CORP
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