发明授权
- 专利标题: Photographing lens system with focus informing means
- 专利标题(中): 摄影镜头系统具有焦点通知方式
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申请号: US290402申请日: 1981-08-05
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公开(公告)号: US4371245A公开(公告)日: 1983-02-01
- 发明人: Hiroshi Iwata , Tsunemi Yoshino , Toshitsugu Kashihara , Akitoshi Morioka
- 申请人: Hiroshi Iwata , Tsunemi Yoshino , Toshitsugu Kashihara , Akitoshi Morioka
- 申请人地址: JPX Osaka
- 专利权人: West Electric Company, Ltd.
- 当前专利权人: West Electric Company, Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX55-109369 19800808
- 主分类号: G02B7/04
- IPC分类号: G02B7/04 ; G02B7/28 ; G03B17/18 ; G03B3/00 ; G03B13/18
摘要:
A photographing lens, which is to be mounted on a camera in an interchangeable manner is provided with a focus-informing means, which informs the photographer of focussings of the photographing lens during manual focussing operation thereof by buzzer or by small lamp, thereby enabling to provide a semi-automatic focussing for a conventional camera body without provision of an automatic focus adjusting means.
公开/授权文献
- US5006249A Anaerobic waste water treating process 公开/授权日:1991-04-09