SLM-4 Slit lamp Microscope Microscope Type parallel Eyepiece 12.5? Total Magnification 6?? 10?? 16?? 25?? 40? Diameter of Visual Field ?37??23??14??8.7? ?5.7mm Diopter Adjustment +5D?-5Dlllumination Slit Width 0mm?11mm continuously adjustable Slit Height 1mm?11mm continuously adjustable Aperture Diameter ?9??8??5??3??2??1? ?0.2mm Slit Angle 0°?180° Slit Inclination 5°?10°?15°?20° Magnification 0.794? Filter heat absorption, grey, redfree, Cobalt blue Input Voltage 110V/220V 60/50Hz Power 60VA Illumination Bulb halogen bulb 12V/50W Fixation red LED