[ Astronomical spectrographs; ] Binoculars; [ Microscope condensers; Microscope illuminating devices; ] Microscopes; Microscopes and parts thereof; Microscopes and their parts; [ Microscopes, including stereomicroscopes; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; ] Optical lens sights; Optical lenses; [ Optical apparatus and instruments, namely, optical por...