... men. 2.3 steps. 3.With controlled pedal 4.motorized focus ophthalmic Operating MicroscopeEyepieces Magnification 12.5x, Pupil distance adjustable ... , illumination intensity 60000lux Objectives: F200mm(175mm, 250mm etc ) Focusing: Motorized, range +/-25mm, speed 33s/whole distance Maximum length of arm ... switch: Waterproof Weight: 107kg ophthalmic Operating Microscope,5steps,motorized focus (ASOM-3A)