Microscopes; Monoculars; Periscopes; Telescopes; Biological microscopes; Cover glass for microscope slides; Distance measuring apparatus; Electron microscopes; Electronic locks; Endoscopy cameras for industrial purposes; Fluorescence microscopes; Laser range finders; Lenses for microscopes; Lenses for telescopes; Metallurgical microscopes; Microscope objectives; Microscopes, including stereomicroscopes; Polarizing microscopes; Scanning electron microscopes; Zoom microscopes