Abstract: In a processor for producing autostereoscopic pictures on lenticular print film, a film strip carrier sequentially positions frames of a negative film strip series in front of a projecting and enlarging lens. A lamp housing provides a light source through a light cone for exposing each negative onto the film, and a stepping motor moves the lens and negative to scan a predetermined segment below each lenticule, and stops the lens when the next negative is to be advanced into the light gate. A driving motor is coupled to the lamp housing, and the speed of the motor and width of the light cone are determined as a function of the operating characteristics of the processor such that the lamp housing moves without stopping during the entire projecting cycle and the cone width is the minimum necessary to permit such continuous movement.