OPTICAL AND PHOTOGRAPHIC INSTRUMENTS AND PARTS THEREOF--NAMELY, STILL [ AND MOTION PICTURE ] CAMERAS; [ MOTION PICTURE AND SLIDE TRANSPARENCY PROJECTORS; CINEMATOGRAPHIC AND PROJECTOR LENSES; LIGHT SHUTTERS, BELLOWS, LIGHT FILTERS, ] HOODS, [ RANGE AND VIEW FINDERS; EXPOSURE METERS; FILM MAGAZINES AND TRIPODS; PHOTOGRAPHIC FLASH GUNS AND LAMPS; TILTING HEADS FOR PANORAMIC CAMERAS; PHOTOGRAPHIC SELF-TIMERS; DEVELOPING, PRINTING, ] ENLARGING [ AND FINISHING ] APPARATUS [ ; OPHTHALMOSCOPIC CAMER...