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From: Melinda (
Subject:         Microscope - High school model, Oil immersion
Date: July 31, 2011 at 10:51 am PST

Microscope - High school model, Oil immersion $250.00 ppd
National Optical and Scientific Instruments (
Mine is an older Model 140, and was replaced with Model 160. Go to their website for a picture:
Description below:
Compound Microscopes
Suggested Retail Price $ 575.00
Model 160
Superior in design and in performance, the 160 series incorporates a wide range of features designed for university and laboratory use. Superb optical clarity and reliable mechanical engineering assure years of top performance. Choose from four grades of objective lenses: Standard achromatic lenses deliver excellent clarity and normal flatness of field; ASC high contrast deliver extra image contrast; Semi-plan for extra flatness of field; Plan achromatic for superior clarity and flatness of field.
• Widefield 10x /18mm eyepiece, pointer standard in one eyepiece. 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.), 40xR (0.65 N.A.) and 100xR oil immersion (1.25 N.A.) objectives. Choose from achromatic, super high contrast, or plan. All are parfocalled, parcentered and color-coded.
• Quad objective turret is ball-bearing mounted for smooth, precise positioning of objectives, features textured rubber knurling for easy grip. Mounted in reverse position to facilitate ease in changing slides.
• 12v 20-watt halogen with variable rheostat control.
• Illuminated on/off switch, 3-wire grounded cord and plug.
• 0.5A time delay fuse.
• Coaxial coarse and fine focusing controls, coarse has tension adjustment, fine is graduated.
• Large 140mm x 135mm (5-1.2 in. x 5-1/4 in.) stage; built-in, low profile, ball-bearing mounted mechanical specimen holder with low-position coaxial controls, 70mm (x) by 50mm (y) movement with graduations of 0.1mm.
• 1.25 N.A. Abbe condenser has rack & pinion focusing, iris diaphragm, swing-out filter holder with clear blue, green and yellow filters supplied.
• Rugged cast aluminum, gray enamel finish.
• Base dimensions: 185mm x 235mm (7-1/4 in. x 9-1/4 in.)
Height 420mm (16-1/2 in.).
Net wt. 6.3 kgs (13.9 lbs).
I accept checks or money orders. You may email Melinda at for any questions.

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