National 460TBL-20 1-3x Stereo Zoom Microscope

BH #NAS460TBL20 • MFR #460TBL-20
National
National 460TBL-20 1-3x Stereo Zoom Microscope
Key Features
  • 10W Halogen Top Light with Reflector
  • 5W Fluorescent Bottom Light with Filter
  • 45° Inclined Viewing Head
  • 20x Stereo Eyepiece
The 460TBL-20 1-3x 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. This model of the 460 stereo microscope has a paired 20x eyepiece delivering a 20x to 60x continuous magnification range. The achromatic objective lens system is parfocalled throughout the zoom range to keep the specimen in focus while zooming in/out.
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Expected availability: 7-14 business days
$454.95
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National 460TBL-20 Overview

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

The 460TBL-20 1-3x 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. This model of the 460 stereo microscope has a paired 20x eyepiece delivering a 20x to 60x continuous magnification range. The achromatic objective lens system is parfocalled throughout the zoom range to keep the specimen in focus while zooming in/out.

The 460TBL-20 can illuminate the specimen from above using a 10W 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 source has a reflector that is controlled by a directional lever next to the focus dial.

A user-friendly design complements the range of features that make the 460 stereo zoom microscope a welcome addition to labs and classrooms. The viewing head accommodates specimen heights up to 36mm / 1.4" 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 a single focus dial and includes a slip clutch mechanism to prevent mishandling. An adjustable interpupillary distance, individually adjustable diopter correction, and reticle holder/retainer provide the 460 series with the flexibility needed to create a customized viewing experience.

Optical System

  • Paired 20x inclined eyepiece
  • 1-3x achromatic and parfocalled objective system
  • 20x to 60x magnification range
  • 70mm / 2.8" working distance
  • 36mm / 1.4" 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) 10 watt halogen illumination with directional reflector
  • Transmitted (bottom) 5 watt fluorescent illumination with blue filter
  • Dual base-mounted On/Off switches
  • Grounded power cord

Construction Details

  • 80mm translucent white stage plate, 80mm black contrast plate
  • Locked on metal stage clips
  • 360° rotating viewing head
  • Cast metal frame
  • Grey enamel finish
  • 12.5" (32 cm) height
  • 9 lb (4 kg) weight

National 460TBL-20 Specs

Microscope TypeStereo
Head45° Inclined Binocular
Nosepiece1-Position Nosepiece
Imaging
Optical Magnification20x, 60x
Objective1 to 3x
Eyepiece20x
Illumination
Illumination TypeTop: Halogen (12 V, 10 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)
12.5" / 32 cm (Microscope)
Weight9 lb / 4 kg
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