National 431-430PHF-15 2x/4x Stereo Microscope

National 431-430PHF-15 2x/4x Stereo Microscope

National 431-430PHF-15 2x/4x Stereo Microscope

B&H # NASI431PHF15 MFR # 431-430PHF-15
No Longer Available

Product Highlights

  • 15W Halogen Adjustable Top Light
  • 5W Fluorescent Bottom Light with Filter
  • Post-Mounted Adjustable Viewing Head
  • 45° Inclined Viewing Head
  • 15x Stereo Eyepiece
  • 2x/4x Objectives, 30x/60x Magnification
  • Parfocalled Parcentered Paired Objective
  • 80mm Frosted Glass/Contrast Stage Plates
  • Rack and Pinion Focusing
Show moreShow less

National 431-430PHF-15 Overview

  • 1Description

The 431-430PHF-15 2x/4x Stereo Microscope from National Optical is a dual magnification stereoscopic 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 430PHF stereo microscope has a paired 15x eyepiece delivering 30x and 60x magnification. Two achromatic paired objectives are parcentered and parfocalled to keep the specimen centered and focused when switching between the two magnification settings.

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 430 series microscope includes a post-mounted viewing head that is height-adjustable to accommodate specimen heights up to 72mm / 2.8". The viewing head is also capable of 360° rotation to help share the stereo eyepiece among colleagues and students without moving the microscope. An adjustable interpupillary distance, adjustable diopter correction, and reticle holder/retainer provide this 430 series microscope with the flexibility needed to create a customized viewing experience.

Optical System
  • Paired 15x inclined eyepiece
  • 2x and 4x achromatic objectives
  • 30x and 60x magnification
  • Parfocalled, parcentered, paired objectives
  • 94mm / 3.7" working distance, 72mm / 2.8" 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) 15 watt halogen illumination with beam intensity/direction controls
  • Transmitted (bottom) 5 watt fluorescent illumination with blue filter
  • Dual base-mounted On/Off switches
Construction Details
  • 360° rotating viewing head
  • Post-mounted viewing head with locking support collar
  • 80mm frosted glass stage plate,  80mm reversible contrast plate
  • Locked on metal stage clips
  • Cast metal frame
  • Grey enamel finish
  • 13" (32.5 cm) maximum height
In the Box
National 431-430PHF-15 2x/4x Stereo Microscope
  • Eyeshields
  • Dustcover
  • Limited Lifetime Warranty (Excluding Bulb)
  • Table of Contents
    • 1Description

    National 431-430PHF-15 Specs

    Microscope Type Stereo
    Eyepiece 15.0x
    Objective(s) 2.0x / 4.0x
    Head Inclined
    Light Source 12 V, 15 W halogen (incidental); 120 V, 5 W fluorescent (transmitted)
    Light Control 4-position On/Off
    Stage 80mm frosted glass stage plate, 80mm reversible contrast plate
    Interpupillary Adjustment 2.2 - 3" (55 - 75 mm)
    Maximum Specimen Height 2.8" (72 mm)
    Maximum Height 13" (32.5 cm)
    Weight Not specified by mfr

    National 431-430PHF-15 Reviews

    Be the first to review this item

    National 431-430PHF-15 Q&A

    National 431-430PHF-15 Accessories

    See any errors on this page? Let us know.