PURPOSE: To rationally execute auto-focusing control or film rewinding by using a clutch interlocking with the operation of a camera.
CONSTITUTION: The driving of a single-lens reflex mechanism is divided into 1st and 2nd driving systems, clutching mechanisms A, B, D are arranged between one driving system out of the 1st and 2nd driving systems to be driven by changing the rotational direction of a built-in motor 1 and the output shaft of the motor 1 and the connection/disconnection of the mechanisms A, B, D is controlled by an operation button. The rotation of the upper output shaft of the motor 1 is transmitted to a film winding mechanism and a shutter charging mechanism through the clutch in a unit A. The forward rotation outputted from the lower output shaft of the motor 1 drives a mirror and an iris through a clutch unit B. The reverse rotation of the motor 1 drives an auto-focusing mechanism and a film winding mechanism. Consequently, auto-focusing control or film winding can be rationally executed.