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National Optical Model 109-LED Student Microscope, Cordless LED
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Model 109-LED (Cordless) is scaled down for younger students, but has standard microscope format most commonly used in U.S. schools. Simple to use, yet prepares students for easy transition to high school instruction. Precision optical system; achromatic, optical glass lenses. Rugged metal components engineered for years of reliable performance. Student proofing features minimize loss of parts and other student abuse. Recommended for instruction through grade 6.
OPTICAL SYSTEM
Widefield 10x eyepiece with revolving pointer.
45° inclined head for ease of viewing when seated.
Head rotates 360°.
Color coded 4x, 10x, 40xR objectives provide 40x, 100x and 400x magnification.
Revolving triple nosepiece with positive click stops for easy, precise magnification changes.
ILLUMINATION
Cordless LED Illuminator (109-LED) - lighting equivalent to a 20-watt tungsten bulb, rechargeable NiMH batteries, auto cutoff recharger, on/off switch with rheostat control.
FOCUSING
Rack and pinion focusing.
Slip clutch protects focusing mechanism from over-turning.
Tension adjustment eliminates focus drift.
Rack stop prevents damage to slides and lenses.
Coarse and fine focus.
STAGE
88mm x 82mm stage (3-1/2 in. x 3-1/4 in.) with locked-on, spring activated stage clips.
Disc diaphragm.
FRAME
Rugged cast metal with inclination joint, gray enamel finish.
Height 295mm (11-3/4 in.).
WARRANTY
Lifetime limited warranty, excluding bulb, cord, and fuse.
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