Invention Grant
- Patent Title: Zoom lens and imaging apparatus
- Patent Title (中): 变焦镜头和成像设备
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Application No.: US14627047Application Date: 2015-02-20
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Publication No.: US09405107B2Publication Date: 2016-08-02
- Inventor: Noboru Koizumi , Michio Cho
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Young & Thompson
- Priority: JP2012-182810 20120822
- Main IPC: G02B9/34
- IPC: G02B9/34 ; G02B15/17 ; G02B13/18 ; G02B13/00 ; G02B15/20

Abstract:
A zoom lens consists essentially of a positive first lens group, a negative second lens group, a negative third lens group, and a positive fourth lens group. During zooming from the wide angle end to the telephoto end, the first lens group and the fourth lens group are fixed, the third lens group is moved monotonously from the object side to the image side, and the second lens group is moved to correct an image plane variation associated with the zooming When the amounts of movements of the second lens group and the third lens group are taken as M2 and M3 respectively, the zoom lens satisfies a conditional expression (1): 0
Public/Granted literature
- US20150160444A1 ZOOM LENS AND IMAGING APPARATUS Public/Granted day:2015-06-11
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