TIANYAN

Spectroscopes; Astronomical spectrographs; Lenses for microscopes; Magnifying glasses; Microscopes; Microscopes and their parts; Monoculars; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Optical lenses; Optical reflectors; Sighting telescopes for firearms; Stereoscopes; Telescopes; Telescopic sights for artillery; Telescopic gun sights; Microscope objectives