Binoculars; Monoculars; Telescopes; Gun scopes; Infrared cameras; Infrared detection apparatus; Infrared sensors; Lenses for telescopes; Night vision goggles; Passive infrared detectors; Range finders for hunting; Remote sensors for use in measuring thermal and infrared radiation energy waves; Rifle scopes; Sighting telescopes for firearms; Spotting scopes; Telescopic lens sights; Telescopic riflescopes; Telescopic sights; Telescopic sights for firearms