National Optical & Scientific 420 Series Stereo Zoom Microscopes: Model - 420-430PHF-10

Optical System:

• Paired widefield 10x eyepieces are 45° inclined, with dual diopter adjustments, interpupillary adjustment from 55mm to 75mm.
• Eyepieces equipped with reticle holder/retainer to accept reticle with 22.8mm
• Viewing head rotates 360°.
• Continuous magnification from 10x thru 40x.

Illumination:

• Top light is 6v 7 watt "œflat filament" tungsten with rheostat control.
• Bottom light is 120v 5 watt fluorescent for cool operation, greater light efficiency, up to 10,000 hour bulb life.
• 4-position light control: top only/bottom only/top and bottom/off.

Focusing System:

• Large dual focusing knobs with slip-clutch to prevent damage to mechanism.
• Tension adjustment eliminates focus "œdrift".

Stage:

• Stage surface measures 6.5" (165mm) wide x 8.75" (220mm) deep.
• Includes two 80mm stage plates: frosted glass and reversible black/white plastic contrast plate.
• Locked-on stage clips.

Frame:

• Professional, all-metal frame.
• Heavy-duty post mount with locking collar, permits up or down adjustment of viewing head to accommodate different sized objects on stage

Illumination:                              Top (Halo) ; Bottom (Fluor)
Head:                                           Inclined
Eyepiece:                                    WF10x
Objectives:                                1x to 4x Zoom (10x thru 40x mag.)
Stand Type:                                Post