... 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, ... powerField diameter: 85.0mm ~ 8.5mmWorking distance: 200,250,300,350,400 mm40mm focal range of fine focusing speed 1 ...