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National 155-MS Monocular Compound Microscope

B&H # NACM155MS Mfr # 155-MS
Usually ships in 7-10 business days

Availability Details


This is a special order item. Est. arrival at B&H is 7-10 business days (subject to availability). Your order will be charged at the time of shipment.

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

Free Standard Shipping
Not eligible for free Expedited Shipping
You Pay: $357.85
Product Highlights
  • DIN Standard 4x, 10x, 40xR Objectives
  • 40x, 100x, 400x Magnification
  • Widefield 10x Eyepiece
  • 45° Inclined Monocular
  • Focusing Safety Features
  • 5 Watt Fluorescent Illumination
  • Lifetime Warranty

The National Optical & Scientific Instruments 155-MS Monocular Compound Microscope is an advanced model designed for use in high school labs. Highlights include a full size frame, 5W fluorescent illumination, crisp optics, and a lifetime warranty.

The DIN standard objectives include 4x, 10x, and 40xR lenses for 40x, 100x, and 400x magnification. A 3-hole objective turret facilitates smooth, precise changes. For student's comfort, the 155-MS also has a 45° inclined monocular with a widefield 10x eyepiece. The monocular can be rotated 360° for sharing with other students as well.

Other features of the 155-MS include a movable stage for focusing, and multiple safety mechanisms that protect the instrument from damage. Illumination for the microscope is provided by a 5 watt fluorescent bulb. This bulb produces virtually no base heat, and is rated at 10,000 hours.

Optical System
  • Widefield 10x eyepiece with pointer. Accepts optional #965- 160 eyepiece reticle
  • 45° inclined monocular viewing head rotates 360° for easy sharing by more than one student
  • DIN standard 4x (0.10 N.A.), 10x (0.25 N.A.) and 40xR (0.65 N.A.) objectives are supplied for 40x, 100x and 400x magnification. All are achromatic, parfocalled, parcentered and color-coded
  • 3-hole objective turret, reverse position, ball-bearing mounted for smooth, precise changes in magnification
  • Stage moves up or down, eyepiece and body remain fixed
  • Slip clutch prevents damage from over focusing
  • Tension adjustment eliminates stage drift
  • Safety rack stop prevents damage to slides and objective lenses
  • Built-in 5 watt fluorescent illumination, delivers greater light and longer life than standard 20 watt tungsten bulb. Virtually no base heat. 10,000 hour rated bulb
  • Base mounted on/off switch, heavy-duty 3-wire grounded electrical system and plug
  • 0.5A time delay fuse
Microscope Type Compound
Head Monocular
Magnification 40x, 100x, 400x
Objectives DIN achromat 4x, 10x, 40xR
Eyepiece Widefield 10x, 18mm with pointer
Light Source 5W fluorescent
Electrical Input 110V
Stage 4.7 x 4.9" (120mm x 125mm) stage, with locked-on spring mounted stage clips, drilled and tapped to accept optional mechanical stage (included)
Nosepiece 3-hole click stop, ball-bearing mounted
Lens (Condenser) Built-in 0.65 N.A. condenser lens, calibrated 5-hole disc diaphragm
Overall Dimensions Not specified by manufacturer
Weight 9 lb / 4kg
National 155-MS Monocular Compound Microscope
  • Limited Lifetime Warranty
  • Care & Cleaning

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    Pearstone -  Microfiber Cleaning Cloth, 18% Gray (7 x 7.9")
    • You Pay: $4.99

    Slide Sets

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    Celestron -  Blank Microscope Slides (72 pieces)
    • You Pay: $3.49

    Microscope Accessories

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    Celestron -  Digital Microscope Imager
    • You Pay: $44.99

    Books & Tutorials

    Celestron -  Book: The World of the Microscope
    • You Pay: $8.95
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