Invention Grant
- Patent Title: Zoom lens and image pickup apparatus equipped with zoom lens
- Patent Title (中): 变焦镜头和配有变焦镜头的摄像设备
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Application No.: US13540425Application Date: 2012-07-02
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Publication No.: US08526117B2Publication Date: 2013-09-03
- Inventor: Kenji Shinohara , Akihisa Horiuchi
- Applicant: Kenji Shinohara , Akihisa Horiuchi
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon USA Inc IP Division
- Priority: JP2011-149734 20110706
- Main IPC: G02B15/14
- IPC: G02B15/14

Abstract:
A zoom lens including first to fifth lens units in order from an object side toward an image. The refractive powers of the first to the fifth lens units are positive, negative, positive, negative and positive, respectively. The distance between the first and the second lens units is increased at the time of zooming from the wide angle end to the telephoto end, and the distance between the second and the third lens unit is decreased at the time of zooming from the wide angle end to the telephoto end. The first lens unit and the fourth lens unit are fixed for the zooming. When M2 and M3 are the amounts of movement of the second lens unit and the third lens unit at the time of zooming from the wide angle end to the telephoto end, respectively, the conditional expression; 0.2
Public/Granted literature
- US20130010174A1 ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH ZOOM LENS Public/Granted day:2013-01-10
Information query