An automatic microfilm camera is electronically controlled, as by an electronic logic controller, logic and control unit, or the like, for example. The camera has an automatic feeding stack loader for picking up documents of randomly mixed sizes, photographing them, and then depositing them in an output tray. The automatic feed may be interrupted, so that single documents may be copied. Then, the automatic feed restarts and continues from the point of interrupt. A plurality of sensors respond to documents in order to control both the time of shutter opening and the exposure actuation. Various forms of documents may be processed, including a fan-folded computer readout requiring a pin drive wheel.