发明名称 |
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摘要 |
A shutter control circuit for a single lens reflex camera includes a capacitor 8 for storing a voltage proportional to the measured object brightness value through a first switch 7, a second switch 14 for selecting the automatic or manual mode, and a variable resistor 12 having two sliding contact terminals A and B coupled to a third switch 11 controlled by the position of the reflex mirror 26. In the automatic mode one of the sliding contact terminals B is set to the difference between the f-stop and film sensitivity values, which influences the capacitor charge, which in turn controls the exposure time through a first position of the selecting switch. In the manual mode the other sliding contact terminal A directly controls the exposure time through a second position of the selecting switch. |
申请公布号 |
DE2651330(B2) |
申请公布日期 |
1978.09.07 |
申请号 |
DE19762651330 |
申请日期 |
1976.11.10 |
申请人 |
ASAHI KOGAKU KOGYO K.K., TOKIO |
发明人 |
KAWASAKI, MASAHIRO, TOKIO |
分类号 |
G03B7/01;G03B7/083;G03B9/62 |
主分类号 |
G03B7/01 |
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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