Tilting heads for cameras; cameras; tripods for cameras; slide projectors; self-timers for cameras; photographic flash units for cameras; flash lamps for cameras; lens filters for cameras; lens caps for cameras; lens hoods for cameras; flash guns for cameras; film magazines for cameras, without film; shutter releases for cameras; lenses for photographic apparatus; exposure meters; movie projectors; transparencies projection apparatus; cinematographic cameras; projection screens for movie films; telescopes; lens-barrels for telescopes; tripods for telescopes; periscopes; binoculars; reflectors for telescopes; prisms for telescopes; lenses for telescopes; microscopes; magnifying glasses; lens-barrels for microscopes; metallurgical microscopes; biological microscopes; reflectors for microscopes; prisms for microscopes; polarizing microscopes; stereoscopes; lenses for microscopes.;