Pair EWF 10x22 mm eyepieces Trinocular head, 45° inclined tubes. Tubes can be positioned in upper or lower positions Interpupillary distance 54-75 mm Diopter adjustment on left eyepiece Reversed quintuple revolving nosepiece on ball-bearings Plan phase PLPH 10x, 20x, S40x IOS objectives. All optical parts are anti-fungus treated 250 x 230 mm stage with 120 x 78 mm mechanical stage