National Optical 168 Laboratory Binocular Microscope

The National Optical Model 168 microscope with semi-plan optics combines superior design and performance with a binocular head for enhanced image perspective and viewing comfort. It is an ideal microscope for university, laboratory, and professional use, or for families who want the best quality for viewing cells.

This compound binocular microscope provides superb optical clarity with higher-quality semi-plan DIN optics. The precision coaxial focusing and low-position coaxial stage controls are a pleasure to use and deliver smooth, reliable performance. Other features like the reverse position objective turret facilitate slide changing and ease of operation. The bright 3-watt LED lighting with variable intensity control, 1.25 N.A. Abbe condenser, and iris diaphragm with swing-out filter holder provide great contrast control. Order immersion oil for 1000x objective. National Optical model 168-SP, lifetime warranty. 

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• 10x widefield 30° inclined eyepieces with 18mm exit pupil distance and a pointer in one eyepiece
• 360° rotating binocular head for extended viewing comfort
• Dual eyepiece diopters with interpupillary adjustment from 54mm to 76mm
• 4x (0.10 NA), 10x (0.25 NA), 40xR (0.65NA) and 100xR (1.25 NA) deluxe semi-plan objectives are DIN standard, parcentered, parfocaled, and color coded
• 40xR objective is retractable, 100xR objective is oil retractable
• The reverse position 4-objective turret is ball-bearing mounted for smooth, precise changes in magnification
• Coaxial fine and coarse focusing with slip clutch to prevent damage to slides or optics
• Coarse focus has tension adjustment to eliminate stage drift, fine focus is graduated
• All metal rack and pinion focusing
• Large 140 x 135mm stage with stage stop and integrated mechanical stage with low-position coaxial x-y controls and 70mm (x) by 50mm (y) movement with graduations of 0.1mm
• Adjustable 1.25 NA Abbe condenser with rack and pinion focusing and an iris diaphragm for contrast control
• Swing-out filter holder with frosted filter
• 3-watt long-life LED illumination with a variable intensity knob for precise lighting control
• 110V-220V external auto-switching power supply
• Field of view is 4.5mm at 40x and 0.18mm at 1000x
• Cast aluminum frame, stands 17" tall
• Includes operating instructions and a dust cover
• Replacement light bulb is available
• Lifetime warranty
• National Optical Model 168-SP