Invention Grant
- Patent Title: Zoom lens and image pickup apparatus including the same
-
Application No.: US15297617Application Date: 2016-10-19
-
Publication No.: US10295806B2Publication Date: 2019-05-21
- Inventor: Nobuyuki Miyazawa , Tomoyuki Nakamura , Naotoshi Ogawa , Kazuya Shimomura
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Carter, DeLuca & Farrell LLP
- Priority: JP2015-206068 20151020; JP2015-206171 20151020; JP2015-206172 20151020; JP2015-206173 20151020; JP2015-206174 20151020
- Main IPC: G02B15/14
- IPC: G02B15/14 ; G02B15/173 ; G02B15/177 ; G02B15/20 ; G02B15/16 ; G02B15/17 ; G02B15/24 ; G02B9/60 ; G02B9/62 ; G02B5/00 ; G02B27/64 ; G02B7/04

Abstract:
A zoom lens, includes, in order from object side: a front unit including a unit including a first unit arranged closest to the object side and not moving for zooming; an Nf unit including three or more lenses and having a negative refractive power; an stop; a first rear unit moving during zooming; a second rear unit moving during zooming; and a third rear unit not moving for zooming, in which: the front unit includes four or more lenses and includes one or more units having a positive refractive power; and a difference between positions of the first rear unit at a wide angle end and a telephoto end, a difference between positions of the second rear unit at the wide angle end and the telephoto end, a focal length of the second rear unit, and a focal length of the zoom at the wide angle end are appropriately set.
Public/Granted literature
- US20170108678A1 ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME Public/Granted day:2017-04-20
Information query