Abstract: A control device independent of and designed for use with professional cameras for operating an electromagnetically drivable shutter or magnetic shutter and for determining and setting exposure values, wherein the device includes a power source and means for determining and setting exposure values, both of which are exchangeably or detachably connectable operatively via the control device to the magnetic shutter and to a light measuring or metering probe, the means for determining and setting the exposure values being adjustable to operate in a plurality of selective functional modes.

Abstract: A camera is provided having an electronic timer controlled by ambient light. There is provided an electromechanical delayed action stop for the shutter. An electronic delay device is provided for temporarily delaying the action of the shutter of the camera after it has been released. An electronic switching device is provided including a signal lamp which is connected to the two poles of a battery. The switching device is so controlled in dependence upon the action of the delay device tht the signal lamp emits a distinctive light signal during the action of the delaying device and the subsequent exposure. A flashing circuit is arranged to provide a flashing signal during the delay period, the circuit being arranged to operate the lamp continuously during the exposure period.

Abstract: A photographic camera shutter is moved to open and returned to its closed position by electromagnetic actuating means. A special electronic circuit is connected with said actuating means to energize the electromagnetic device with sufficient potential to cause a smooth and rapid opening movement which then decreases to a lower potential during the time interval that the shutter is to be maintained in its open position.