Invention Grant
- Patent Title: Zoom lens system and image pickup apparatus including the same
- Patent Title (中): 变焦透镜系统和包括其的摄像装置
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Application No.: US12688012Application Date: 2010-01-15
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Publication No.: US08477429B2Publication Date: 2013-07-02
- Inventor: Masao Hori , Youtarou Sanjou
- Applicant: Masao Hori , Youtarou Sanjou
- Applicant Address: JP
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP
- Agency: ;Rossi, Kimms & McDowell LLP
- Priority: JP2009-008715 20090119
- Main IPC: G02B15/14
- IPC: G02B15/14
Abstract:
A zoom lens system includes, in order from object-side to image-side a positive first lens unit, a second negative lens unit, a third lens unit, and a fourth positive lens unit. The fourth unit includes a front subunit having positive power and a rear subunit having positive power. The following conditions are satisfied:−2.100×10−3×νd+0.693
Public/Granted literature
- US20100182705A1 ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME Public/Granted day:2010-07-22
Information query
