Automatic diaphragm setting apparatus for camera

摘要

A camera automatic diaphragm control includes an electromagnet operable under the control of a known electric circuit for detecting the brightness of a subject when the shutter is tripped and a diaphragm setting member supported and spring biased in one direction so as to turn along the attracting face of the electromagnet and to operate a diaphragm blade directly when so turned. After the shutter has been tripped, the diaphragm setting member is freed from its cocked position so as to turn in the biased direction and turns under the control of the electromagnet to determine the size of the diaphragm aperture.