Binoculars; Biological microscopes; Camera lens mounts; Eye glasses; Filters for optical devices; Lenses for telescopes; Microscope objectives; Microscopes; Microscopes and parts thereof; Monoculars; Oculars; Optical lens sights; Optical or telescopic lens sights; Prisms; Sun glasses; Telescopes; Telescopic lens sights; Telescopic sights; Tripods