.~ Having circuit for controlling a diaphragm shutter (354/435) {4}
FOR 740
.~.~ Solenoid control type (354/440)
DEFINITION
Classification: 396/FOR.740
Solenoid control type: (354/440)
Subject matter under subclass FOR 735 in which a solenoid is used to release the diaphragm shutter or to stop the diaphragm shutter at a specific aperture size.