Profile: Coin Optics specializes in microscopes. The MP-613 stereo microscope has adjustable diopter correction on left eyepiece, inclined binocular head, rack & pinion gear focusing mechanism and 10X wide-field eyepieces. The MP-120 portable stereo microscope has inclined binocular head and 20X magnification with 10X wide-field eyepieces. It has rack and pinion focusing with tension adjustment to eliminate focusing drift.