National 446 Series Dual Magnification Stereo Microscope, 1X and 3x

National 446 Series Dual Magnification Stereo Microscope, 1X and 3x The 446 Series offers all the qualities, features, and versatility of larger stereo microscopes in a compact size. Efficiency of design enables you to select magnification simply by turning the objective turret. Comfortably view your specimen with the 45ﾰ eyepieces and 360ﾰ rotating head, and position the microscope in forward or reverse viewing positions. MAGNIFICATION1x & 3xOPTICAL SYSTEMPaired widefield eyepieces with diopter adjustment on left side. Interpupillary adjustment from 55mm to 75mm. Reticle holder/retainer accepts eyepiece reticle with 23mm O.D..Magnification changed by rotating objective turret 90 degrees, to positive click stop.Working distance: 47mm. Maximum specimen height on stage, 35mmHead rotates 360 degrees to permit reverse head position viewing.ILLUMINATIONHigh intensity 12v 10 watt incidental and transmitted illumination is built-in.Separate base mounted switches control power on/off, top