National 411TBL-20 2x/4x Stereo Microscope

National 411TBL-20 2x/4x Stereo Microscope

National 411TBL-20 2x/4x Stereo Microscope

B&H # NASI411TBL20 MFR # 411TBL-20
National 411TBL-20 2x/4x Stereo Microscope

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Expected availability: 7-14 business days

Product Highlights

  • 10W Top/12W Bottom Tungsten Lighting
  • 45° Inclined Viewing Head
  • 20x Stereo Eyepiece
  • 2x/4x Objectives, 40x/80x Magnification
  • Parfocalled/Parcentered Paired Objective
  • 80mm Frosted Glass Stage
  • Rack and Pinion Focusing
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National 411TBL-20 overview

  • 1Description

The 411TBL-20 2x/4x Stereo Microscope from National Optical is a dual magnification stereoscopic microscope fit for laboratories, high school 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 411 microscope has a paired 20x eyepiece delivering 40x and 80x magnification. The stage can be illuminated from above using a 10W tungsten light and/or from under stage using a 15W tungsten light, both activated by separate base-mounted On/Off switches.

A user-friendly design complements the range of features that make the 411 series a welcome addition to labs as well as classrooms. This microscope has a single focusing dial and a 360° rotating viewing head to help share the eyepiece among colleagues and students without moving the microscope. The rack and pinion focus system also includes a slip clutch mechanism to prevent mishandling. An adjustable interpupillary distance, left-side diopter correction, and reticle holder provide the 411 series stereo microscope with the flexibility needed to create a customized viewing experience.

Optical System
  • Paired 20x inclined eyepiece
  • 2x and 4x achromatic objectives
  • 40x and 80x magnification
  • Parfocalled, parcentered, paired objectives
  • 95mm / 3.7" working distance, 27mm / 1.1" maximum specimen height
  • Eyepiece with diopter adjustment and reticle holder/retainer
  • 55-75mm / 2.2-3" interpupillary distance
  • Rack and pinion focus system
  • Slip clutch prevents over-turning
  • Tension adjustment prevents focus drift
  • Incidental (top) 10 watt tungsten illumination
  • Transmitted (bottom) 15 watt tungsten illumination with blue filter
  • Dual base-mounted On/Off switches
Construction Details
  • 80mm frosted glass and 80mm reversible black and white stage plates
  • Locked on metal stage clips
  • 360° rotating viewing head
  • Cast metal frame
  • Grey enamel finish
  • 14.6" (37 cm) maximum height
  • 9 lb (4.1 kg) weight
In the Box
National 411TBL-20 2x/4x Stereo Microscope
  • Eyeshields
  • Dustcover
  • Limited Lifetime Warranty (Excluding Bulb)
  • Table of Contents
    • 1Description

    National 411TBL-20 specs

    Microscope Type Stereo
    Eyepiece 20.0x
    Objective(s) 2.0x / 4.0x
    Head Inclined
    Light Source 12 V, 10 W tungsten (incidental); 110 V, 15 W tungsten (transmitted) with blue filter
    Light Control 4-position On/Off
    Stage 80 mm frosted glass and reversible black/white contrast plate
    Interpupillary Adjustment 2.2 - 3" (55 - 75 mm)
    Maximum Specimen Height 1.1" (27 mm)
    Maximum Height 14.6" (37 cm)
    Weight 9 lb (4.1 kg)

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