Microscopes; Monoculars; Telecameras; Telescopes; Biological microscopes; Body-tubes for telescopes; Day and night vision systems primarily comprised of day and night sensors, day and night cameras, and monitors; Hunting binoculars; Lenses for telescopes; Night vision goggles; Safety goggles; Sighting telescopes for firearms; Telescopic sights; Thermal imaging cameras; Tripods