Abstract: The analog signal corresponding to the brightness of the object to be photographed is converted into a digital signal by means of an A-D converter while a shutter control means adjust the shutter mechanism in accordance with the digital signal stored in the A-D converter whereby at the same time, a digital information indicating circuit indicates digitally the digital signal stored in the A-D converter. Hereby, the digital information indicating circuit is connected with the timing pulse forming circuit in such a manner that the indication circuit repeats the indication by means of the timing pulse forming circuit with a period allowing the photographer to visually recognize the digital information of the indicating circuit.