National Optical Model 446TBL-10 Stereo Microscope (Two Magnification)

National Optical Model 446TBL-10 Stereo Microscope (Two Magnification)

National Optical Model 446TBL-10 Stereo Microscope (Two Magnification)
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Model 446TBL-10 All the quality features and versatility of larger stereo microscopes, in a compact size that is more efficient for many uses. 10x and 30x Magnification Choose low or high magnification simply by turning the objective turret. Viewing head is 45 degrees inclined and rotates 360 degrees so that user can position microscope conveniently in forward or reverse viewing position. Post mount permits head to be adjusted up or down to accommodate larger objects on stage. OPTICAL SYSTEM Paired widefield eyepieces with diopter adjustment on left side. Interpupillary adjustment from 55mm to 75mm. Reticle holder/retainer accepts eyepiece reticle with 23mm O.D.. Paired objectives are parfocalled, parcentered, achromatic. Magnification changed by rotating objective turret 90 degrees, to positive click stop. Working distance: 75mm. Maximum specimen height on stage, 35mm Head rotates 360 degrees to permit reverse head position viewing. ILLUMINATION High intensity 12v 10 watt incidental and transmitted illumination is built-in. Separate base mounted switches control power on/off, top and bottom lights, permit use of top light only, bottom light only, top and bottom lights together. FOCUSING Rack & pinion focusing has slip clutch to protect mechanism against over-turning, and special tension adjustment. STAGE Supplied with two 80mm stage plates, one frosted glass and one plastic black/white reversible contrast. Two locked-on stage clips. FRAME Rugged cast metal frame, gray enamel finish. Height: 310mm (12-1/4 in.) extends to 370mm (14-3/4 in.) for larger objects. Base width: 115mm (4-1/2 in.), Base depth: 197mm (7-3/4 in.) Net wt. 2.5 kgs (5.5 lbs) PACKING Molded styrofoam container with instruction brochure, vinyl dustcover & rubber eyeshields. Individual: Ship wt. 4.1 kgs (9 lbs), Dimensions 400x425x275mm (16x17x11 in.) WARRANTY Lifetime limited warranty, excluding bulbs, cord, and fuse.



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