The invention provides a camera which uses a signal integrating and accumulating type image sensor for receiving light from a photographing optical system prior to the photographing operation and for producing an output which can be utilized for a predetermined purpose, with the integrating time of the image sensor being controlled in accordance with the output from the image sensor. According to the improvements of the present invention, the signal integrating time of the image sensor is fixed, in association with the photographing operation, at the value of that of the integrating operation just before the photographing operation.