... Location Electric continuous variable stepless Main and with the optical microscope, with magnification, the same field of view, clear image, ... experts xenon lighting, dual bulb conversion The contemporary high-tech microscope level, the national high-tech products for neurosurgery, ENT, ... 350,400 mm40mm focal range of fine focusing speed 1 ~ 2 mm / sMicroscope before and after, left the pitch range ...