Altimeters; Binoculars; Cameras; Clinometers; Directional compasses; Distance measuring apparatus; Electric meters; Fire and smoke detectors; Laser speed detectors; Microscopes; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Radar detectors; Sighting telescopes for firearms; Surveying instruments; Telemeters; Telescopes; Tool measuring instruments