National 212-RLED Four Objective Cordless Microscope

BH #NA212RLED • MFR #212-RLED
National
National 212-RLED Four Objective Cordless Microscope
Key Features
  • DIN 4x / 10x / 40xR / 100xR Objectives
  • 10x Wide Field Eyepiece with Pointer
  • 40x / 100x / 400x / 1000x Magnification
  • Achromatic / Parfocalled / Parcentered
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The 212-RLED Cordless Microscope from National Optical is a four-objective single viewing microscope with a 45° inclined monocular. The four objectives are 4x, 10x, 40xR, and 100xR. They are located on a rotating turret with a ball bearing mount. Both the turret and the included objectives adhere to the DIN microscope objective standard. Therefore, you can use any commercially available DIN objective with this microscope without worrying about it ever becoming obsolete. The wide field 10x eyepiece has a pointer and can accept optional reticle.
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Expected availability: 7-14 business days
$529.00
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National 212-RLED Overview

  • 1Description
  • 2Optical System
  • 3Focusing
  • 4Illumination
  • 5Stage
  • 6Construction Details

The 212-RLED Cordless Microscope from National Optical is a four-objective single viewing microscope with a 45° inclined monocular. The four objectives are 4x, 10x, 40xR, and 100xR. They are located on a rotating turret with a ball bearing mount. Both the turret and the included objectives adhere to the DIN microscope objective standard. Therefore, you can use any commercially available DIN objective with this microscope without worrying about it ever becoming obsolete. The wide field 10x eyepiece has a pointer and can accept optional reticle.

The microscope features achromatic lenses which reduce color distortions introduced by imperfections in optical elements. Reducing these color distortions allows you to see sharper images with better color fidelity. The parfocalled and parcentered design allows for switching objectives without having to realign your sample and without losing focus. The focusing system has separate fine and coarse controls.

The LED illumination system has adjustable brightness which is controlled by a rheostat. It delivers light intensity equivalent to that of a 20W incandescent bulb. The light from the bottom LED emitter is focused on the sample with a 1.25 NA Abbe condenser.

The 5.3 x 5.3" mechanical stage has adjustable height, a movable slide holder and allows you to move specimen slides in X-Y plane. The slide holder bracket holds your slides securely in place. The frame of the microscope is made of cast metal with gray enamel finish.

Included with the microscope are three rechargeable AA NiMH batteries, battery charger, a dustcover, and two Allen wrenches for rack stop and eyepiece socket tension adjustment.

Optical System

  • Eyepiece with pointer: 10x wide field
  • Eyepiece can accommodate optional reticle
  • DIN 4x, 10x, 40xR, 100xR objectives
  • Objective 40xR and 100xR are retractable
  • The 100xR objective ought to be used with immersion oil
  • Total magnification: 40x, 100x, 400x and 1000x
  • Achromatic, parfocalled and parcentered lenses
  • Monocular is inclined 45°
  • Head rotates 360°

Focusing

  • Separate fine and coarse focusing
  • Slip clutch prevents damage to focusing system
  • Tension adjustment eliminates stage drift
  • Safety rack stop prevents damage to slides and objective lenses

Illumination

  • LED illumination equivalent to a 20W tungsten bulb
  • Rheostat intensity control
  • 1.25 N.A. Abbe condenser lens with spiral focusing mount
  • Iris diaphragm, swing-out filter holder, blue filter

Stage

  • Mechanical stage
  • X-Y slide motion control
  • Stage size: 5.3 x 5.3"
  • Adjustable stage height
  • Movable specimen slide holder

Construction Details

  • Objective turret:
    - Four objective holes
    - Reverse position
    - Mount with ball bearings
  • Cast metal frame with handles
  • Gray enamel finish

National 212-RLED Specs

Microscope TypeCompound
Head45° Inclined, 360° Rotating Monocular
Nosepiece4-Position Nosepiece
Imaging
Optical Magnification40x, 100x, 400x, 1000x
Objective4x, 10x, 40x, 100x
Eyepiece10x Wide Field
FocusingCoarse, Fine
Illumination
Illumination TypeLED
Condenser1.25 Numerical Aperture (NA) Abbe
DimmerYes
General
Power SourceBattery
Battery3 x AA NiMH (50-Hour Runtime)
MaterialMetal
Dimensions22 x 16 x 10" / 56 x 41 x 25 cm (Microscope)
5.3 x 5.3" / 135 x 135 mm (Specimen Stage)
Weight14 lb / 6.4 kg
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