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National Optical Model 155, High School / College Level Compound Microscope
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National Optical Model 155, High School / College Level Compound Microscope
A new standard of precision optics, highly engineered mechanics and very rugged construction, all at little more cost than a budget microscope. Objective turret (nosepiece) is in reverse position to permit easier changing and positioning of specimen slides. Preferred by teachers, the 5-watt fluorescent illumination system provides optimum image brightness, virtually no bulb heat and has a 10,000-hour rated bulb life.
OPTICAL SYSTEM
Widefield 10x eyepiece with pointer. Accepts optional #965-160 eyepiece reticle.
45° inclined monocular viewing head rotates 360° for easy sharing by more than one student.
DIN standard 4x (0.10 N.A.), 10x (0.25 N.A.) and 40xR (0.65 N.A.) objectives are supplied for 40x, 100x and 400x magnification. All are achromatic, parfocalled, parcentered and color-coded.
3-hole objective turret, reverse position, ball-bearing mounted for smooth, precise changes in magnification.
ILLUMINATION
Built-in 5-watt fluorescent illumination, delivers greater light and longer life than standard 20-watt tungsten bulb. Virtually no base heat. 10,000 hour rated bulb.
Base mounted on/off switch, heavy-duty 3-wire grounded electrical system and plug.
0.5A time delay fuse.
FOCUSING
Separate low position coarse and fine focusing controls.
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.
STAGE
Large 120mm x 125mm (4-3/4 in. x 5 in.) stage, with locked-on spring mounted stage clips, drilled and tapped to accept optional mechanical stage (Model 155-MS).
Built-in 0.65NA condenser lens.
Calibrated 5-hole disc diaphragm.
FRAME
Rugged cast metal, gray enamel finish.
Height 380mm (15 in.).
PACKING
Molded styrofoam container with instruction brochure and vinyl dustcover.
Individual: Ship wt. 6.4 kgs (14 lbs), Dimensions 550x375x375mm (22x15x15 in.)
WARRANTY
Lifetime limited warranty, excluding bulb, fuse, cord, and accessory mechanical stage.
Features | Benefits | |
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| Built-in 5-watt fluorescent illumination | Cool and reated at 10,000 hours | |
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