National Optical intermediate and high school dual head material microscopic lense. Superior DIN optical system combined with LED illumination delivers greater light efficiency than basic 20 watt tungsten bulb and ensures cool operating temperature level. Dual seeing head allows simultaneous viewing by student and teacher, and is likewise optimal for video microscopy. An extremely functional microscopic lense advised for direction through grade 12. Widefield 10x eyepiece with revolving tip, provided in both diagonal and vertical seeing tubes. Accepts optional # 965-160 eyepiece reticle. Vertical and 30 degree inclined tubes mounted on 360 degree turning head for ease of use. Vertical tube has diopter adjustment, positioned low for simpler cam mounting, utilizing optional accessory # 930-028 video c-mount. DIN standard, achromatic, parfocalled, parcentered, and color-corded: 4x (0.10 N.A.), 10x (0.25 N.A.), and 40xR (0.65 N.A.) goals. 3-hole nosepiece is ball-bearing mounted for more precise alignment, has positive click stops. Built-in LED illumination, delivers greater light and longer life than basic 20 watt tungsten bulb. Virtually no base heat. 50,000 hour rated bulb. Base mounted on/off switch, durable 3-wire cord. Big 110-millimeters length by 120-millimeters width phase, with locked-on spring mounted phase clips, is drilled and tapped to accept optional mechanical phase (Version 139-MS). Built-in 0.65 NA condenser lens. Adjusted 5-hole disc diaphragm. Rugged cast metal, gray enamel finish. Frame height: Inclined eyepiece 340-millimeters. Frame vertical eyepiece 400-millimeters. Molded styrofoam container with direction brochure and vinyl dustcover. Lifetime limited guarantee, leaving out bulb, cord, and accessory mechanical phase. Measures 12-inches length by 13-inches by width 22-inches height.
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
Lifetime limited warranty, excluding bulb, cord, and accessory mechanical stage