HWF 10×22 mm eyepieces Trinocular head, 30° inclined tubes. Tubes can be positioned in upper or lower positions Interpupillary distance 50-75 mm Diopter adjustment on both eyepieces Reversed quintuple revolving nosepiece on ball-bearings M-plan 5x, 10x IOS infinity corrected objectives and M-plan semi-apochromatic 50x100x IOS infinity corrected objective All optical parts are anti-fungus treated 150 x 140 mm stage