PURPOSE: To execute the moving control of a photographing lens and the aperaure forming control of a diaphragm blade with a simple mechanism, to reduce a cost, to effectively utilize a space and to make a camera small in size and light in weight by simpler constitution while saving the electric power.

CONSTITUTION: When the pulses of numbers corresponding to ranging information are fed to an electromagnet for focusing 6 from a feeder circuit for focusing 36, a link mechanism interlocking with the movable iron core of the magnet 6 is actuated and the photographing lens is moved to a focusing position corresponding to the ranging information. Simultaneously, the position of the diaphragm movement restriction part of the like mechanism is changed and the opening position of a shutter blade corresponding to the ranging information is decided. Thereafter, power is supplied to a feeder circuit for a shutter 37 and an electromagnet for a shutter 14 is exited. Then, the shutter blade is opened to the opening position. At this time, the first transistor Tr1 of the feeder circuit 36 is made non-conductive and a small current held by the movable iron core is fed to the magnet 6 from the feeder circuit 37 side through a circuit for saving the power 38. Then, the power is saved.