Spectroscopes; Anti-reflective lenses; Lens filters; Lenses for photographic apparatus; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Optical filters; Optical glasses; Optical lenses; Optical lenses featuring anti-fog coatings, UV-blocking treatment and anti-scratch coatings; Optical lenses made of glass, plastic and polycarbonate; Optical reflectors; Photogra...