Motion picture apparatus and instruments including motion picture cameras, developing or finishing apparatus and instruments, editing machines, projectors, screens, sound recording machines and instruments; optical apparatus and instruments including telescope equipment such as telescopes, binoculars, periscopes, telescope lenses, telescope prisms, telescope mirrortubes, telescope reflectors and tripods; microscopes including biological microscopes, metallurgical microscopes, polarizing microscopes, magnifiers, microscope lenses, microscope prisms, microscope mirror tubes and microscope reflectors; photographic equipment including cameras, camera lenses, camera shutters, camera bellows, slide projectors, developers, printers, enlargers, finishers, filters, hoods, tripods, tilting pan heads, self-timers, range-finders, exposure meters, magazines, releases, flash guns, powder flashers, flash lamps; precision measuring instruments; wireless communication equipment including single channel transmitters and receivers, multichannel transmitters and receivers, vehicular transmitters and receivers, marine transmitters and receivers, aeronautical transmitters and receivers and portable transmitters and receivers; audio and video equipment including sound recorders, electric phonographs, sound amplifiers, AM and FM tuners, graphic equalizers, record turntables, record players, tape players and recorders, audio tapes, loud speakers, video players and recorders, video cameras and video tapes.