Binoculars; Eyewear; Oculars; Periscopes; Photometers; Spectroscopes; Stereoscopes; Telescopes; Astronometric measuring machines and instruments; Magnifying glasses; Micrometer screws; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Optical condensers; Optical glasses; Optical lanterns; Optical lens sights; Optical lenses; Prisms for optics purposes; Reflecting ...