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The National Optical & Scientific Instruments 431-430-PHF-10 Stereo Microscope sets itself apart from the rest of the models in the 430 series with its 2x and 4x magnification provided by paired 10x eyepieces. Inclined at a 45° angle, the two eyepieces also feature diopter adjustment, a reticle holder/retainer, and the ability to rotate 360° on the viewing head. Magnification is controlled by rotating the objective turret 90° to positive click stops.
The 431-431-PHF-10 also features top and bottom light illumination. The user can choose to use the halogen top light, the fluorescent bottom light, or both lights together. The base of the microscope consists of two 80mm stage plates, a blue filter for transmitted light, and locked-on stage clips. Rack and pinion focusing ensures a clear image, while the post mount can be adjusted up or down to accommodate different sized objects on the stage.
Paired widefield 10x eyepieces, inclined 45 degrees, diopter adjustment, interpupillary adjustment from 55mm to 75mm
Eyepieces equipped with reticle holder/retainer to accept reticle with 23mm O.D.
Viewing head rotates 360°, adjusts up or down on post mount to accommodate difference size specimen
Paired objectives are parfocalled, parcentered and achromatic
Magnification changed by rotating objective turret 90° to positive click stops
Top light (incidental) is 12V, 15 watt halogen, bi-pin with adjustable beam with variable intensity control
Bottom light (transmitted is 120V, 5 watt fluorescent
4-position light control: top only / bottom only / top and bottom / off
Professional, all-metal frame
Rack and pinion focusing with slip clutch and tension adjustment
Heavy-duty post mount with locking collar, permits up or down adjustment of viewing head to accommodate different sized objects on stage
Includes two 80mm stage plates: frosted glass and reversible black/white plastic contrast plate
Blue filter for transmitted light
Locked-on stage clips
In the Box
National 431-430-PHF-10 Stereo Microscope
Limited Lifetime Warranty
Table of Contents
Not specified by manufacturer
Widefield 10x, 20mm
Top light: 12V 15W halogen
Bottom light: 120V 5W fluorescent