Binoculars; Microscopes; Oculars; Telescopes; Body-tubes for microscopes; Electron microscopes; Lenses for cameras; Microscope condensers; Microscope illuminating devices; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Optical glasses; Prisms; Reflectors for microscopes; Scientific and technical apparatus, namely, optical mirrors; Voltage stabilizing power supply