National 446 Series Stereo Microscope

National 446 Series Stereo Microscope. All the quality features and versatility of larger stereo microscopes, in a compact size that is more efficient for many uses. Choose low or high magnification simply by turning the objective turret. Viewing head is 45 degrees inclined and rotates 360 degrees so that user can position microscope conveniently in forward or reverse viewing position. Post mount permits head to be adjusted up or down to accommodate larger objects on stage. MAGNIFICATION 10x EP with 1x / 3x turret, equals 10x and 30x total magnification. OPTICAL SYSTEM Paired widefield eyepieces with diopter adjustment on left side. Interpupillary adjustment from 55mm to 75mm. Reticle holder/retainer accepts eyepiece reticle with 23mm O.D.. Paired objectives are parfocalled, parcentered, achromatic. Magnification changed by rotating objective turret 90 degrees, to positive click stop. Working distance: 75mm. Maximum specimen height on stage, 35mm Head rotates 360 degrees to permit