Coelostats; Filters for optical devices; Laboratory equipment, namely, spectroscopes; Lens filters; Microscopes and parts thereof; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Optical lens blanks; Optical lenses featuring anti-fog coatings, UV-blocking treatment, anti-scratch coatings; Optical lenses made of glass, plastic, polycarbonate; Optical reflectors; ...