National 420-430PHF-20 1-4x Stereo Zoom Microscope

National 420-430PHF-20 1-4x Stereo Zoom Microscope

National 420-430PHF-20 1-4x Stereo Zoom Microscope

B&H # NASZ420PHF20 MFR # 420-430PHF-20
National 420-430PHF-20 1-4x Stereo Zoom Microscope

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Product Highlights

  • 15W Halogen Adjustable Top Light
  • 5W Fluorescent Bottom Light with Filter
  • Post-Mounted Adjustable Viewing Head
  • 45° Inclined Viewing Head
  • 20x Stereo Eyepiece
  • 20-80x Magnification Range
  • Parfocalled Parcentered Paired Objective
  • Frosted Glass/Plastic Contrast Plates
  • Rack and Pinion Focusing
  • 55-75mm Interpupillary Adjustment
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National 420-430PHF-20 overview

  • 1Description

The 420-430PHF-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 430PHF 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 430PHF 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 430PHF stereo zoom microscope a welcome addition to labs and classrooms. This configuration of the 420 series microscope includes a post-mounted viewing head that is height-adjustable to accommodate specimen heights up to 93mm / 3.7". The viewing head is also 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 this 420 series microscope 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, 93mm / 3.7" maximum specimen height
  • 55-75mm / 2.2-3" interpupillary distance
  • Individual diopter adjustments
  • Accepts 23mm eyepiece reticle
  • Rack and pinion focus system
  • Slip clutch prevents over-turning
  • Tension adjustment prevents focus drift
  • 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
  • 360° rotating viewing head
  • Post-mounted viewing head with locking support collar
  • 80mm frosted glass stage plate, 80mm reversible black/white contrast plate
  • Locked on metal stage clips
  • Cast metal frame
  • Grey enamel finish
  • 17" (43 cm) maximum height
  • 11.7 lb (5.3 kg) weight
In the Box
National 420-430PHF-20 1-4x Stereo Zoom Microscope
  • Eyeshields
  • Dustcover
  • Limited Lifetime Warranty (Excluding Bulb)
  • Table of Contents
    • 1Description

    National 420-430PHF-20 specs

    Microscope Type Stereo
    Eyepiece 20.0x
    Objective(s) 1.0 - 4.0x
    Head Inclined
    Light Source 12 V, 15 W halogen (incidental), 110 V, 5 W fluorescent (transmitted)
    Light Control 4-position On/Off
    Stage 80 mm frosted stage plate, 80 mm reversible black/white contrast plate
    Interpupillary Adjustment 2.2 - 3" (55 - 75 mm)
    Maximum Specimen Height 3.7" (93 mm)
    Maximum Height 17" (43 cm)
    Height 17" (43 cm)
    Weight 11.7 lb (5.3 kg)

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