The HIRMP15-500 lenses are powerful 2 megapixel infrared (IR) corrected motorized zoom lenses. The IR corrected SD Glass (special low dispersion glass) has lower chromatic abberation than ED glass (extra-low dispersion glass) which allows the lens to always stay in focus, from visible light to infrared light. With a 15-500mm focal length the HIRMP15-500 can benefit almost any application. Designed to fit a C-Mount camera with a 1/2" CCD or smaller, this can also be used on a CS-Mount camera with..