Invention Grant
- Patent Title: Zoom lens and image pickup apparatus including the same
- Patent Title (中): 缩放透镜和包括其的图像拾取装置
-
Application No.: US13953172Application Date: 2013-07-29
-
Publication No.: US08934047B2Publication Date: 2015-01-13
- Inventor: Masaru Sakamoto
- Applicant: Canon Kabushiki Kaisha
- Applicant Address: JP
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP2012-180898 20120817
- Main IPC: G02B13/16
- IPC: G02B13/16 ; H04N5/225 ; H04N5/262 ; G02B9/60 ; G02B15/14 ; H04N5/335 ; G02B15/17

Abstract:
Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power which does not move; a second lens unit having a negative refractive power which moves during zooming and focusing; a third lens unit having the negative refractive power which moves during zooming; a fourth lens unit having one of the negative refractive power and the positive refractive power; and a fifth lens unit having the positive refractive power, in which a lateral magnification (β2w) of the second lens unit at a wide angle end when an object distance is infinity, and a ratio of a focal length (f2) of the second lens unit and a focal length (f3) of the third lens unit are appropriately set.
Public/Granted literature
- US20140049672A1 ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME Public/Granted day:2014-02-20
Information query