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 National Optical Model 161, Trinocular Tube for Photography or Teaching
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. OPTICAL SYSTEM Widefield 10x /18mm eyepiece, pointer standard in one eyepiece. Accepts optional #965-160 eyepiece reticle. Dual viewing head with 30� inclined eyepiece, and vertical eyepiece with diopter, rotates 360� for easy sharing by more than one student. Permits dual viewing, or mounting of optional video adaptor on vertical tube. 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.) Achromatic objectives. 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. ILLUMINATION 12v 20 watt halogen with variable rheostat control. Illuminated on/off switch, 3-wire grounded cord and plug. 0.5A time delay fuse. FOCUSING Coaxial coarse and fine focusing controls, coarse has tension adjustment, fine is graduated. STAGE 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. FRAME Rugged cast aluminum, gray enamel finish. Base dimensions: 185mm x 235mm (7-1/4 in. x 9-1/4 in.) Height : Inclined eyepiece, 380mm (15 in.). Vertical eyepiece, 455mm (18 in.). PACKING Head and frame in separate molded styrofoam container with instruction brochure and vinyl dustcover. Individual: Ship wt. 7.8 kgs (18 lbs), WARRANTY Lifetime limited warranty, excluding bulb, cord, and fuse.
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