National 417TBL-20 2x/4x Stereo Microscope

National 417TBL-20 2x/4x Stereo Microscope

National 417TBL-20 2x/4x Stereo Microscope

B&H # NAS417TBL20 MFR # 417TBL-20
National 417TBL-20 2x/4x Stereo Microscope

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Product Highlights

  • 5W Top/Bottom Fluorescent 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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You Pay: $435.00

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  • 1Description

The 417TBL-15 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 417 microscope has a paired 20x eyepiece delivering 40x and 80x magnification. The stage can be illuminated from above and/or below using a 5W fluorescent light activated by separate base-mounted On/Off switches. A fluorescent light source will not produce as much heat as a tungsten source and is also favored by many researchers for its relatively cool color temperature and long life.

A user-friendly design complements the range of features that make the 417 series a welcome addition to labs as well as classrooms. The heavy-duty post-mounted adjustable viewing head permits use of specimen heights up to 31mm / 1.2", and is also capable of 360° rotation to help share the eyepiece among colleagues and students without moving the microscope. The single focus dial rack and pinion system also includes a slip clutch mechanism to prevent mishandling. An adjustable interpupillary distance, left-side diopter correction, and reticle holder/retainer provide the 417 series stereo microscope with the flexibility needed to create a customized viewing experience.

Optical System
  • 20x paired eyepiece 
  • 45° inclined stereo eyepiece
  • 2x and 4x achromatic objectives
  • 40x and 80x magnification
  • Parfocalled, parcentered, paired objectives
  • 94mm / 3.7" working distance, 31mm / 1.2" 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) 5 watt fluorescent illumination
  • Transmitted (bottom) 5 watt fluorescent 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
  • 14.8" (37.5 cm) maximum height
  • 9.2 lb (4.2 kg) weight
In the Box
National 417TBL-20 2x/4x Stereo Microscope
  • Eyeshields
  • Dustcover
  • Lifetime Limited Warranty (Excluding Bulb)
  • Table of Contents
    • 1Description
    Microscope Type Stereo
    Eyepiece 20.0x
    Objective(s) 2.0x / 4.0x
    Head Inclined
    Light Source 110 V, 5 W fluorescent (incidental/transmitted)
    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 1.2" (31 mm)
    Maximum Height 14.8" (37.5 cm)
    Weight 9.2 lb (4.2 kg)

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