Orbital International Inc.



MU20B Series Infinity-Corrected Binocular Microscope 40X-1000X LED Kohler Illumination

SKU: VMU0002-B

Quick Review:

  • Siedentopf binocular head
  • Infinity corrected plan objectives
  • Equipped with a 3w LED lamp
  • Standard Köhler illumination 
  • Ergonomically designed metal frame for stability and durability
  • Brightfield, darkfield, phase contrast, and polarization (optional)



The MU20B Series Infinity Corrected Microscope offers superior performance. Equipped with infinity corrected objectives, the MU20B Series is built to withstand the demands of daily work in laboratory and classroom environments. Equipped with a 3w LED lamp, field diaphragm,  Abbe condensers and other optical components. A standard Köhler illumination system provideing uniformly bright and free-from-glare specimen illumination, which provides high image quality with brighter and sharper resolutions for photomicrography.The digital microscope version is equipped with a digital camera on a trinocular head, allowing users to go beyond conventional image processing functions.

Packing List:

  • One binocular microscope
  • One bottle of immersion oil
  • One dust cover
  • User Manual
  • 5 year limited warranty


Shipping Information:

16" x 12" x 22"-26lbs


Item No.


Infinity Plan Objective




4X, 10X, 20XR, 40XR, 100XR




Viewing Head

Siedentopf binocular head which will not change the length in the eyepiece tubes when interpupillary distance adjustments are made

30° inclined and 360° rotatable

Interpupillary adjustment of 50mm-75mm


Wide field (WF)10x/20mm

High eyepoint

Diopter adjustment on both eyepiece tubes


Calibrated eyepiece pointer on one eyepiece


Optional reticule eyepiece available for measurement purposes: 0.1mm/2cm Scales w/Crossline available (not included)


Revolving reversed quintuple objective nosepiece accepts five objectives which are color-coded, parcentered and parfocaled.

The nosepiece runs on ball bearings and has internal click stops so that the image remains centered after each change in magnification.


Infinity corrected, Plan Achromatic DIN 4X/0.10 ∞/0.17

Infinity corrected, Plan Achromatic DIN 10X/0.25 ∞/0.17

Infinity corrected, Plan Achromatic DIN 20XR/0.40 ∞/0.17

Infinity corrected, Plan Achromatic DIN 40XR/0.66 ∞/0.17

Infinity corrected, Plan Achromatic DIN 100XR/1.25 oil ∞/0.17

20XR, 40XR and 100XR objectives are retractable which have resilient mounts for specimen protection

Focusing System

Low position coaxial coarse and fine focus knobs on both sides

Fine focus graduation of 2µm

Focusing range 23mm

Rack and pinion coarse focusing stops at both ends of travel to prevent damage to the microscope gears

Tension adjustment eliminates focus drift



Large 190mm x 140mm built-in double layer mechanical stage

smooth X/Y calibrated movement with cross travel range 78mm x 55mm


Built-in Kohler illumination with field diaphragm, provides uniformly bright and free-from-glare specimen illumination

Focusable N.A. 1.25 Abbe condensers which height is controlled by a rack and pinion gear system that allows the condenser focus to be adjusted for proper illumination of the specimen

Adjustable aperture iris diaphragm incorporated into the condenser, which is important in securing correct illumination, contrast, and depth of field; a graduated scale indicates the approximate adjustment (size) of the aperture diaphragm corresponding to respective objectives. Blue filter included. 

3w LED for optimum illumination and contrast

With light intensity control

Other Characters

Ergonomically designed metal frame for stability and durability

Carrying handle integrated in the back of the stand for easy carrying

Arm and base made of one piece construction

Antifungal treatment prevents fungal growth

Optional Accessory

Available (not included)

Dark field kit (Dark field condenser N.A. 0.9 'Dry' for objective 4X-40X)

Phase contrast kit (10X/20X/40X/100X infinity plan phase contrast objective, turret phase contrast condenser, and centering telescope)

Polarization kit (Analyzer/Polarizer) Swing out N.A. 0.9/0.13 achromatic condenser available (not included)


Footer With Address And Phones