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National 131-LED-MS Compound Microscope with Mechanical Stage

B&H # NA131LEDMS Mfr # 131-LED-MS
Usually ships in 7-14 business days

Availability Details


This is a special order item. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at the time of shipment.

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For international orders, credit cards will be charged at time you place your order.

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Not eligible for free Expedited Shipping
You Pay: $278.95
Product Highlights
  • LED Illumination
  • Graduated Mechanical Stage
  • Inclined Monocular Viewing Head
  • 10x Eyepiece with Revolving Pointer
  • 4x/10x/40xR DIN Objectives
  • 40x/100x/400x Magnification
  • Achromatic/Parfocal/Parcentered Optics
  • Separate Fine/Coarse Focus Control
  • 0.65 Condenser with 5-Hole Diaphragm

The 131-LED-MS Compound Microscope with Mechanical Stage from National Optical is a three-objective inclined microscope designed for middle school and high school students. Achromatic DIN optics minimize image distortions and deliver consistent views on all three magnification settings. The objectives are also parfocalled and parcentered, keeping the specimen in focus and centered in the field of view when the magnification is changed. This microscope was built for reliable performance and is backed by the manufacturer's lifetime warranty.

A user-friendly design complements the range of features that make the 131 series microscope a welcome addition to classrooms. A 360° rotating monocular viewing head enables the eyepiece to be shared with multiple viewers without having to move the microscope. This configuration of the 131 has an individual focus dial for fine and coarse adjustments. The focus system also includes a slip clutch and rack stop that prevents mishandling by novice users. The 131-LED-MS also features a battery-powered cool LED substage illuminator and graduated mechanical stage. National Optical engineered this compound microscope to be durable, portable, and feature-rich enough to help transition high school students to more sophisticated instruments.

Optical System
  • 45° inclined monocular eyepiece
  • 10x, 18mm eyepiece with revolving pointer
  • 4x,10x,40xR color-coded DIN objectives
  • 40x,100x, 400x magnification
  • Rotating objective turret with click stops
  • Achromatic, parfocalled, parcentered objectives
  • 360° rotating head for easier eyepiece sharing
  • Separate fine and coarse focusing knobs
  • Rack-and-pinion focus system
  • Slip clutch prevents over-turning
  • Tension adjustment prevents focus drift
  • Rack stop prevents damage to slides and protects lenses
  • LED illuminator (20 Watt equivalent)
  • 0.65 condenser lens
  • 5-hole disc diaphragm
  • Cordless LED illuminator
  • Up to 150 hours or runtime on 3 standard AA batteries
Construction Details
  • Graduated mechanical stage
  • Cast metal body with inclination joint
  • Grey enamel finish
  • 14" (36cm) height
  • 6.8 lb (3.1 kg) weight
Microscope Type Compound
Body Type 45° inclined monocular
Eyepiece 10.0x (18 mm) with revolving pointer
Nosepiece 3-hole
Objective(s) DIN 4.0x (0.10 NA), 10.0x (0.25 NA), 40.0xR (0.65 NA)
Focuser Low position coarse and fine focus
Light Source LED illuminator (20 Watt tungsten equivalent)
Power Supply (3) AA alkaline batteries
Runtime Up to 150 hours
Specimen Stage 3.5 x 3.25" (8.9 x 8.3 cm)
Lens (Condenser) 0.65 NA
Power Supply (3) AA alkaline batteries
Height 14" (36 cm)
Weight 6.8 lb (3.1 kg)
National 131-LED-MS Compound Microscope with Mechanical Stage
  • Dustcover
  • Lifetime Limited Warranty (Excluding Bulb and Batteries)
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