Our professional binocular microscope incorporates all the best features of a quality laboratory instrument. The objectives face backward, providing more space, and the base is covered with a comfortable plastic material to reduce heat conduction. The illuminator has a field diaphragm adjustment built in, offering Kohler illumination for greater control over lighting options. DR Instruments also offers a wide range of Medical Supplies, Laboratory equipment, including Safety Goggles, Lab Glassware, Microscopes, and Lab Coats. Features: 45° inclined binocular Seidentopf head, rotatable 360° Interpupillary distance adjustment 55-75mm Pair of 10X widefield eyepieces 4 DIN Achromatic objectives: 4X (N.A. 0.10), 10X (N.A. 0.25), 40X (N.A. 0.65), 100X (oil immersion, N.A. 1.25) Magnifications: 40X to 1000X Focusing stop to prevent objectives and slides from damage 140mm x 135mm graduated mechanical stage (range of travel 45 x 80 mm) 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 a blue filter Field diaphragm Coaxial coarse and fine-focusing tension control Variable intensity halogen illuminator, 6V 20W Replacement bulb and fuse, Immersion oil Size: 7"x9"x15" H, N.W.: 13 3/4 lbs. CE Certifed Shipping weight: 18 lbs.