| 摘要 |
<p>PURPOSE:To prevent exposure control from being disabled owing to the cutoff of light metering output by utilizing the light metering output before cutoff processing for momentary stop-down light metering. CONSTITUTION:The outputs of photometery circuits 101-104 are inputted to MCU122 through an analog switch circuit 120. The output of the circuit 100 is inputted to an aperture control means 155. This circuit 100 generates a light metering output for monitoring when an aperture and a shutter are controlled on momentary stop-down light metering basis. A shutter speed, open aperture, stop- down step number, and photographic film speed are set with potentiometers 105-108. A stop-down stop magnet 156 and a shutter magnet 180 are powered on and off with the output of arithmetic processing of the MCU122.</p> |
