A camera having film feed detection means the signal of which varies with the rotation of a rotary detection wheel arranged in between a spool and a film cartridge chamber to follow the rewinding movement of the film and a motorized film rewinding device which rewinds the film by means of a motor is provided with change-over means for changing, according to the output of selection means, the period of time before bringing the motor to a stop after the output of the film feed detection means ceases to vary.