CINEMATOGRAPHIC AND PHOTOGRAPHIC APPARATUS AND ACCESSORIES THERETO-NAMELY PHOTOGRAPHIC CAMERAS AND PROJECTORS, MOTION PICTURE CAMERAS AND PROJECTORS, LENSES, FILTERS, FILTER HOLDERS, FADING APPARATUS, APPARATUS FOR DELAYED EXPOSURE, SHUTTERS, PHOTOGRAPHIC ENLARGERS, TITLING APPARATUS, SPLICERS, FILM VIEWERS, FILM WINDERS, PROJECTION SCREENS, EXPOSURE METERS, FILM PRINTING AND DEVELOPING APPARATUS, DEVELOPING TANKS, FILM MAGAZINES, TRIPODS, AND TRIPOD HEADS