Diaphragm control circuit for camera

Details Diaphragm control circuit for camera Diaphragm control circuit for camera

1980-07-28

1981-11-10

Adams, Russell E.

354 38, 354 44, G03B 7097

Patent

active

042994594

ABSTRACT:
A diaphragm control circuit for a camera responds to a shutter release operation by causing a reverse rotation of a stepping motor to return a diaphragm mechanism to its initial position. Subsequently, the circuitr causes a forward rotation of the motor in accordance with the amount of light received by the camera in order to cause the diaphragm mechanism to establish a proper diaphragm aperture before an opening operation of a shutter is allowed.

REFERENCES:
patent: 3882522 (1975-05-01), Erlichman
patent: 3997905 (1976-12-01), Iwata et al.

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