发明名称 |
Exposure control system for flash photography |
摘要 |
A flash exposure control system comprising a flash lighting unit, a battery circuit connected to said flash lighting unit to energize said flash lighting unit during an exposure, a switching arrangement connected to said flash lighting unit to control the termination of energization of said flash lighting unit, a timer for controlling the conduction of said switching arrangement, the timer having an adjustable circuit for adjusting the duration of conducting time as a function of the camera-to-object distance and the adjustable circuit being responsive to the camera focus adjustment, and an aperture adjusting unit responsive to the focus adjustment for defining an exposure aperture.
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申请公布号 |
US4068245(A) |
申请公布日期 |
1978.01.10 |
申请号 |
US19730375033 |
申请日期 |
1973.06.29 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
OHTAKI, SHOHEI;NAKAMURA, ZENZO;KOZUKI, SUSUMU |
分类号 |
G03B7/16;G03B9/70;(IPC1-7):G03B15/03 |
主分类号 |
G03B7/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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