STANDARD MODEL The objectives face backwards for more space and the base has a comfortable plastic plating over the metal for less heat conduction. The field diaphragm adjustment built into the illuminator offers Koehler illumination for more lighting control options. 30° inclined binocular Seidentopf head, rotatable 360° Interpupillary distance adjustment 55-75mm Pair of 10X widefield eyepieces 4 DIN Achromatic parfocal and parcentered objectives: 4X (N.A.O.10) 10X (N.A. 0.25) 40X (N.A. 0.65) 100X, Oil (N.A. 1.25) Magnification: 40X to 1000X Focusing stop to prevent objectives and slides from damage 140mm x 135mm graduated mechanical stage (range of travel 40 x 80mm) with coaxial drive and comfortable low knob position Spring loaded slide holder Abbe condenser NA 1.25 with rack and pinion adjustment Iris diaphragm with blue filter Field diaphragm offers more light control Coaxial coarse and fine focusing tension controls Variable intensity halogen illuminator, 6V 20W, wide range voltage transformer for international markets, 90V to 240V Spare bulb, fuse, immersion oil Size: 7 x 9 x 15 H, Weight: N. W. 13 ¾ lbs. CE Certified Optional Upgrade Simple Phase Contrast set MP15 10X, 40X, 100X Turret Annular Phase Contrast kit MP20 10X, 20X, 40X, 100X Dark field condenser