National Optical Model 109-L Student Microscope

National Optical Model 109-L Student Microscope

National Optical Model 109-L Student Microscope
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Model 109-L has 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 degree inclined head for ease of viewing when seated.
Head rotates 360 degree.
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
115v 15-watt sub stage illuminator with on/off switch permanently factory mounted.
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.).
With instruction brochure and vinyl dustcover
WARRANTY
Lifetime limited warranty, excluding bulb, cord, and fuse.

Copyright © Edward Nightingale, Fort Myers, Florida
Enight@earthlink.net