40X - 600X Infinity Corrected
Reflected and Transmitted Illumination
Ore-Polarizing Petrographic Microscope
W/ Mineral Slides Set, 3MP Camera

MS-301B Ore-Polarizing Light Microscope

Item Code: MS-301B

Model: pm301B000m (MS-301B)
Shipping Cost: Free Worldwide Shipping

Price: USD $5,650

MS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light MicroscopeMS-301B Ore-Polarizing Light Microscope

Overview and Summary:

  • High Quality Ore-Polarizing Light Microscope useful for geology and petrographic observations of minerals, rocks, and ores, as well as the study of optical mineralogy principles.
  • Physically larger size than most Ore microscopes. Higher grade, more professional design. This model gives the best imaging of any of our microscopes in this same category.
  • Style and functionality similar to Olympus brand.  Similar size and Y-shape frame as the Olympus BX51 model.  Includes built-in screwdriver just like the BX series.
  • Strain-Free Color Corrected Infinity Corrected Optics.
  • Two Sets of Objectives: Long working distance (no cover slip) and Normal working distance (0.17mm cover slip).
  • Includes both transmitted and reflected light polarization ability.
  • Includes both upper (episcopic, reflected) and lower (transmitted) illumination sources.
  • Includes all three: Mica, Gypsum and Quartz Wedge compensator plates.
  • Single Plane Polarizing, Crossed Polars (nicols), Orthoscopic, and Conoscopic Observation.
  • Built-in Bertrand Lens.
  • Circular Rotatable Stage with XY movement specimen slide holder.
  • Centerable Revolving Objective Nosepiece.
  • Measuring reticle in eyepiece with corresponding stage micrometer.
  • Trinocular port for photography.  Includes 3MP USB camera.
  • Sample Rock and Mineral Slides set.
  • Autovolt Worldwide Voltage Requirement. 100-240V, 50/60Hz.
  • 5 – Year Warranty.
  • Free Worldwide Shipping. Consignee is responsible for duties, taxes, and brokerage fees.

Objectives, Magnification, and Eyepieces:

  • LWD Objective Set: Four DIN Strain-Free Plan Achromatic, Infinity Corrected, Long Working Distance Objectives (LMPlan POL): 5x, 10x, 20x, 50x.  Designed for use with no cover slips.  Objective Specs: 5x/0.15 (W.D. 10.80mm), 10x/0.3 (W.D. 10.00mm), 20x/0.45 (W.D. 4.00mm), 50x/0.55 (W.D. 7.90mm).
  • NWD Objective Set: Five DIN Strain-Free Plan Achromatic, Infinity Corrected, Normal Working Distance Objectives (Plan POL): 4x, 10x, 20x, 40x, 60x.  Designed for use with 0.17 mm cover slips.  Objective Specs: 4x/0.10 (W.D. 20.80mm), 10x/0.25 (W.D. 5.30mm), 20x/0.40 (W.D. 1.60mm), 40x/0.60 (W.D. 0.36mm) (Spring Loaded), 60x/0.85 (W.D. 0.47mm) (Spring)(Dry).
  • 10x Eyepiece Set. PL 10x/22mm. High Eye-point for Ease of Viewing when wearing Eyeglasses. We do not include 15x eyepieces because they are useless. The most important part of a microscope is the objective lens. We provide a total of five objective lenses. Don’t be fooled by long lists of different magnifications you can obtain by using a combination of objectives and different eyepieces. In reality, a skilled microscopist is only going to use the 10x eyepiece set as that has the best imaging.  In this ad, we are cutting out the industry-standard marketing gimmicks and getting straight to the point of what a professional geologist will actually need.
  • Measuring Reticle built into one eyepiece: X-Scale 10mm in 100 divisions, 0.1mm/division resolution. Plus Y line.
  • Stage Micrometer: 1 mm in 100 divisions, 0.01 mm / division resolution for calibration of eyepiece reticle.
  • Objective Centering Screws on nosepiece for precise optical alignment. Includes centering wrenches.
  • Eyepiece diopter adjustment to correct for your specific vision needs.


  • Variable Intensity Dual Illumination: Transmitted (Base) and Reflected Episcopic (Upper).
  • Halogen Illumination: 12V-50W (both light sources).
  • Koehler Illumination System with Focusable Field Diaphragm (transmitted).
  • LBD light balancing daylight filter fits on top of the Koehler field diaphragm (transmitted) and fits in a filter holder at the rear of the upper light (reflected).
  • Vertical illuminator with adjustable aperture and field iris diaphragms.  Includes iris centering screws (similar to Zeiss and Olympus, but not found on most other models.).

General Specifications:

  • Rack and Pinion Adjustable Strain Free Abbe Substage Condenser. Numerical Aperture 0.9 with 360 degree rotatable polarizer and iris diaphragm.  Polarizer graduation marks every 2 degrees.
  • Condenser Flip-Top Lens similar to Olympus and Zeiss models.
  • Centerable and focusable Bertrand lens for easy viewing of conoscopic interference patterns.
  • Analyzer with full-range rotating dial provides adjustable cross polarization.  Rotation lock stop screw. Two-degree increments, 6’ precision.
  • Rotatable stage with ball bearing movement.  Diameter 160mm with graduation marks every 1 degree for the full 360 degree rotation. Minimum retardation resolution 6’.  Stage rotation locking clamp screw.  Stage centering screws.
  • Detachable X-Y Mechanical Stage Slide Movement.
  • Coaxial Fine and Coarse Focusing Knobs on Both Sides of Microscope. With travel lock stop to protect slides. Course tension adjustment. Course range: 30 mm. Fine precision 0.002mm.
  • 30 Degree Inclined Trinocular Head (Easier to View than 45 Deg.).
  • Adjustable Interpupillary Distance adjusts to the distance between your eyes.
  • Manufactured under ISO: 9001 Standards.


Included Items:

  • Quartz Wedge 1-4 Order Retarding Compensator Plate.
  • Mica (lambda/4, One Quarter Wavelength) Retarding Compensator Plate. Optical path difference 147.3 nm.
  • Gypsum first-order red (lambda, One Full Wavelength) Retarding Compensator Plate. Optical path difference 551 nm.
  • Comes with Dust Cover and Instruction Manual.
  • Includes a set of Rock and Mineral Slides. Ten (10) thin sections on glass slides: fine granite, gabbro, muscovite schist, greisen, wollastonite, gritstone, evaporite, amphibolitic schist, epidote, kyanite schist.

Camera Equipment Included:

  • Includes 0.5x C-mount camera attachment with adjustable focusing system.
  • Includes 3.1 MegaPixel Digital Camera System.
  • Complete Digital Microscopy Solution Included.
  • Capture high resolution digital microscope images, 2048×1536 pixels.
  • View and record full motion live video microscope images. Frame size options for video mode: 2048X1536 (8 up to 11 FPS, depending on PC), 1024 X 768 (22 FPS), 680 X 510 (43 FPS).
  • Computer connected digital microscope camera connects via USB2.0. Includes USB cable and MS Windows software.
  • Color DSP built into camera provides sharp quality color images. Image sensor size is half inch 6.55×4.92mm). Pixel 3.2×3.2 (micrometers). G Sensitivity 1.0 V/lux-sec.
  • Includes measuring capability with the software.
  • Note: In light microscopy, anything beyond about a 1.4 MP camera resolution is going to be considered empty resolution and give you no more useful data. We do not provide those useless marketing gimmicks. Do not be fooled into thinking high resolution cameras beyond 1.4 MP are better. If you really want one, we can provide it.

Manufacturer’s Warranty:

  • Warranty is 5 years on microscope equipment.
  • The microscope warranty covers problems arising from normal usage.
  • We will repair or replace your defective microscopy equipment as needed during the warranty period.


  • Optional 100x objective lens (both Dry and Oil Immersion).