This National Optical-brand model 131 microscope is designed to meet or exceed high school teaching requirements, is ruggedly built, and includes all the teaching essentials plus popular "student proofing" features.
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Optical system has DIN widefield 10x eyepiece, locked on, with fully rotatable pointer. Objective lenses are 45mm DIN parfocal, achromatic, color-coded 4x, 10x and 40x, giving you magnifications of 40, 100, and 400 power. Built-in illuminator base has a 115V 20 watt bulb, heavy cord, and light switch. Both coarse-focus and fine-focus knobs are included. The slip clutch prevents damage to slides and objective lenses. Large 10mm x 120mm stage is acid- and reagent-resistant. The stage has a built-in condenser lens, and 5-hole disc diaphragm. Stage clips are locked on and spring mounted for ease of use. The microscope is 13.75 inches in height and weighs 7 lbs.; the base is 5 x 7.5 inches. This is a high-quality scope deserving of its popularity!