Invention Application
- Patent Title: ZOOM LENS SYSTEM AND OPTICAL INSTRUMENT USING THE SAME
- Patent Title (中): 使用它的变焦镜头系统和光学仪器
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Application No.: US13482178Application Date: 2012-05-29
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Publication No.: US20120307374A1Publication Date: 2012-12-06
- Inventor: Koji KATO , Masakazu SAORI
- Applicant: Koji KATO , Masakazu SAORI
- Applicant Address: JP Tokyo
- Assignee: PENTAX RICOH IMAGING COMPANY, LTD.
- Current Assignee: PENTAX RICOH IMAGING COMPANY, LTD.
- Current Assignee Address: JP Tokyo
- Priority: JP2011-120495 20110530
- Main IPC: G02B15/14
- IPC: G02B15/14
Abstract:
A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in that order from the object side. The second lens group constitutes a focusing lens group. The following conditions (1) and (2) are satisfied: 0.4
Public/Granted literature
- US08824059B2 Zoom lens system and optical instrument using the same Public/Granted day:2014-09-02
Information query
