National 420AHF-20 1-4x Stereo Zoom Microscope

BH #NASZ420AHF20 • MFR #420-420AHF-20
National
National 420AHF-20 1-4x Stereo Zoom Microscope
Key Features
  • 15W Halogen Adjustable Top Light
  • 5W Fluorescent Bottom Light with Filter
  • Fixed Arm Stand
  • 45° Inclined Viewing Head
The 420AHF-20 1-4x Stereo Zoom Microscope from National Optical is a stereoscopic zoom microscope designed for laboratories and university students. The stereo (two) eyepiece configuration is preferred by most researchers and students because of the superior depth of field and comfort compared to monocular microscopes. The 420AHF stereo microscope has a paired 20x eyepiece delivering a 20x to 80x continuous magnification range. The achromatic objective lens system is parfocalled and parcentered throughout the zoom range to keep the specimen in focus and centered while zooming in/out.
Special Order
Expected availability: 7-14 business days
$668.00

National 420AHF-20 1-4x Stereo Zoom Microscope

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National 420-420AHF-20 Overview

  • 1Description
  • 2Optical System
  • 3Focusing
  • 4Lighting
  • 5Construction Details

The 420AHF-20 1-4x Stereo Zoom Microscope from National Optical is a stereoscopic zoom microscope designed for laboratories and university students. The stereo (two) eyepiece configuration is preferred by most researchers and students because of the superior depth of field and comfort compared to monocular microscopes. The 420AHF stereo microscope has a paired 20x eyepiece delivering a 20x to 80x continuous magnification range. The achromatic objective lens system is parfocalled and parcentered throughout the zoom range to keep the specimen in focus and centered while zooming in/out.

The 420AHF can illuminate the specimen from above using a 15W halogen light and/or from below the stage using a 5W fluorescent light; each light source is activated separately by base-mounted On/Off switches. To help optimize the brightness and contrast of the specimen, the top (incidental) light beam is intensity and direction adjustable.

A user-friendly design complements the range of features that make the 420AHF stereo zoom microscope a welcome addition to labs and classrooms. The viewing head accommodates specimen heights up to 45mm / 1.8" and is capable of 360° rotation to help share the stereo eyepiece among colleagues and students without moving the microscope. The rack and pinion system has dual focus dials and includes a slip clutch mechanism to prevent mishandling. An adjustable interpupillary distance, individually adjustable diopter correction, and reticle holder/retainer provide the 420 series with the flexibility needed to create a customized viewing experience.

Optical System

  • Paired 20x inclined eyepiece
  • 1-4x achromatic, parfocalled, parcentered objective system
  • 20x to 80x magnification range
  • 80mm / 3.1" working distance, 45mm / 1.8" maximum specimen height
  • 55-75mm / 2.2-3" interpupillary distance
  • Individual diopter adjustments
  • Accepts 23mm eyepiece reticle

Focusing

  • Rack and pinion focus system
  • Slip clutch prevents over-turning
  • Tension adjustment prevents focus drift

Lighting

  • Incidental (top) 15 watt halogen illumination with beam intensity/direction controls
  • Transmitted (bottom) 5 watt fluorescent illumination with blue filter
  • Dual base-mounted On/Off switches
  • Grounded power cord

Construction Details

  • 80mm frosted glass stage plate, 80mm reversible black/white contrast plate
  • Locked on metal stage clips
  • 360° rotating viewing head
  • Fixed-arm stand
  • Cast metal frame
  • Grey enamel finish
  • 13.4" (34 cm) height
  • 11.7 lb (5.3 kg) weight

National 420-420AHF-20 Specs

Microscope TypeStereo
Head45° Inclined Binocular
Nosepiece1-Position Nosepiece
Imaging
Optical Magnification20x, 80x
Objective1 to 4x
Eyepiece20x
Illumination
Illumination TypeTop: Halogen (12 V, 15 W)
Bottom: Fluorescent (110 V, 5 W)
General
Power SourceAC Adapter
Interpupillary Adjustment55 to 75 mm / 2.2 to 3"
Dimensions3.2" / 8 cm (Specimen Stage)
13.4" / 34 cm (Microscope)
Weight11.7 lb / 5.3 kg
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