Abstract: The present invention relates to a camera capable of simultaneous film and sound recording and into which film magazine housing a film with a sound recording belt can be loaded. The camera has a sound recording device for recording sound on said sound recording belt of the film while photographing is made and also a driving device to continuously run the above mentioned film against said sound recording device. The camera can be shifted to the simultaneous sound recording state in response to the shutter release operation of the camera being in the preparation completion state for photographing with simultaneous sound recording.

Abstract: A stationary casing of a mechanical mounting for interchangeable lenses which are to be used with a motion picture or still camera is provided with first connecting terminals for electric connection arranged in a space within a coupling adapted to mate with a coupling of the camera housing. Second connecting terminals are also provided for electric connection arranged in a space within a coupling adapted to mate with a coupling of an interchangeable attachment unit. The first and second connecting terminals being electrically connected to each other through respective insulated wires provided in the stationary casing. Such a casing structure permits selection of interchangeable attachment units such as those incorporating a zoom-drive mechanism, an automatic focus-adjusting mechanism and an automatic diaphragm drive mechanism for use with the mechanical mounting.

Abstract: A system for processing a strip of motion picture film with a multi-purpose film handling cartridge adapted for use in film-exposing, processing and projection operations. Responsive to varying rates of travel of the film strip across a processing station provided in the cartridge as it is being transported between the paired spools to which respective ends of the film strip are attached, a variable-speed driving mechanism mounted externally of the cartridge controls the speed of the spool to establish a constant rate of travel of the film strip across the processing station at any particular instance even though the winding diameters of the film strip on the spools are ever being varied, so that a uniform application of a coating of processing fluid is effected along the length of the exposed film strip without the necessity of providing any particular constant speed device within the cartridge.