National Optical Model 111 intermediate level microscope
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National Optical Model 111 intermediate level microscope

National Optical Model 111 intermediate level microscope

National Optical Model 111 intermediate level microscope
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National Optical Model 111 intermediate level microscope
For superior performance, this intermediate level microscope features the same rugged construction and a full-sized DIN optical system of our popular 130 series. Wider field of view, greater resolution, better light condensing system and larger frame than ordinary elementary microscopes. For instruction from elementary level through grade 8 or 9.
0PTICAL SYSTEM
Widefield 10x eyepiece with revolving pointer.
45� inclined viewing head rotates 360�. Permits stage to remain level when viewing wet slides, allows easy sharing by more than one student.
Revolving triple nosepiece with positive click stops.
Achromatic, parcentered, parfocalled DIN standard 4x (0.10N.A.), 10x (0.25N.A.) and 40xR (0.65N.A.) objectives are color-coded.
ILLUMINATION
Built-in 115v 20-watt electric illuminator with on/off switch, heavy-duty 3-wire cord.
FOCUSING
Low-position focusing is rack and pinion, with slip clutch to protect mechanism against over-turning.
Tension adjustment eliminates focusing drift.
Safety rack stop prevents damage to slides and objective lenses.
STAGE
Large 110mm x 120mm (4-3/8 in. x 4-3/4 in.) stage with locked-on, spring mounted stage clips.
0.65NA condenser lens mounted in stage.
Calibrated 5-hole disc diaphragm.
FRAME
Rugged cast metal, gray enamel finish.
Height 340 mm (13-1/2 in.).
With instruction brochure and vinyl dustcover
WARRANTY
Lifetime limited warranty, excluding bulb, cord, and fuse.
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