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National Optical 446-447TBL Dual Power Stereo Microscope

SKU: 446-447TBL
Regular Price: $275.00
On Sale For: $249.00
This National Optical dual power compact stereo microscope has all the quality features and versatility of larger stereo microscopes. Choose low or high magnification simply by turning the objective turret.


  • Objective Lenses: Paired objectives are parfocalled, parcentered, and achromatic. Magnification is changed by rotating objective turret 90° to positive click stops. Viewing head rotates 360°, locks in place by tightening set screw.
    • Model 446 - 1x & 3x objectives.
    • Model 447 - 2x & 4x objectives.
  • Eyepieces: Choose from wide field 10x or 15x eyepieces. 5x or 20x eyepieces can be purchased separately below. Includes diopter on left side. Interpupillary adjustment from 55mm to 75mm. Accepts optional (#965-400-05) or (#965-400-10) eyepiece reticle.
  • Total Magnification: Please view the magnification chart below to see magnifications of each microscope model, as well as field size at different magnifications.
  • Specimen Stage: Supplied with two 80mm stage plates, one frosted glass and one plastic black/white reversible contrast. Two locked-on stage clips.
  • Stand: Rugged cast metal frame with gray enamel finish - head moves up and down on stand.
  • Focusing: Rack & pinion focusing has slip clutch to protect mechanism against over-turning, and special tension adjustment.
  • Illumination: High intensity 12v 10 watt incidental and transmitted illumination is built-in. Separate on/off switches allow lights to be used together or separate of each other.
  • Size & Weight: 12.25" high, extends to 14.75" for larger objects, 5.5 lbs.
  • Includes: Vinyl dust cover and instruction manual.
  • Warranty: Lifetime limited warranty.
  • Working Distance: 75mm
  • Maximum Specimen Height: 60mm

Click here to see ideas of things to view with this microscope.  

446-447 Stereo Microscope Magnification Chart

Model Objectives Eyepieces
WF5x WF10x WF15x WF20x
Total Magnification Field Size Total Magnification Field Size Total Magnification Field Size Total Magnification Field Size
446 1x 5x 22mm 10x 20mm 15x 13mm 20x 10mm
3x 15x 7.3mm 30x 6.7mm 45x 4.3mm 60x 3.3mm

447 2x 10x 20mm 20x 10mm 30x 6.5mm 40x 5mm
4x 20x 5.5mm 40x 5mm 60x 3.3mm 80x 2.5mm


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