National Optical 131-LED Student Compound Microscope with LED Illumination

National Optical intermediate and high school inclined monocular compound microscope. The microscope model that sets the standard for high school instruction, now with the freedom of battery operated cordless illumination. Includes all the most commonly specified features. Rugged metal construction, locked-on parts. Superior DIN optical system and precision mechanical components assure parfocalled and parcentered optical alignment for sharp, unsurpassed viewing. Utilizes disposable batteries for bright, cool illumination from long-life LED bulbs. Widefield 10x eyepiece with revolving pointer. Accepts optional #965-160 eyepiece reticle. 45 degree inclined viewing head rotates 360 degree for easy repositioning of eyepiece and sharing by more than one student. DIN 4x, 10x, and 40xR, objectives are achromatic, parfocalled, parcentered, and color coded. 3-hole nosepiece is ball-bearing mounted for more precise alignment, and has positive click stops. LED light rated up to 50,000 hours life, illumination equal to a 20 watt tungsten bulb. 150 hours of use from 3 standard AA alkaline batteries. Easy-access battery compartment. Rack and pinion coarse focus with tension adjustment, slip clutch, separate fine focus. Stage moves up or down, eyepiece and body remain fixed. Slip clutch prevents damage to focusing system. Tension adjustment eliminates stage drift. Safety rack stop prevents damage to slides and objective lenses. Large 110-millimeters length by 210-millimeters width stage, with locked-on, spring mounted stage clips, drilled and tapped to accept optional mechanical stage. Built in 0.65 condenser lens. Rugged cast metal, gray enamel finish. Frame height is 360-millimeters. Molded styrofoam container with instruction brochure and vinyl dustcover. Lifetime limited warranty, excluding bulb and batteries. Measures 12-inches length by 13-inches by width 22-inches height.