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The 205-RLED Cordless Microscope from National Optical is a three-objective cordless microscope with a 45° inclined monocular, and a 10x eyepiece with an 18 mm wide field of view. The three objectives are 4x, 10x, and 40xR, and feature achromatic lenses which reduce color distortions introduced by imperfections of optical elements. Reducing these color distortions allows you to see sharper images with better color fidelity. The retractable 40xR objective has a spring-loaded lens which will retract when it touches the slide thereby protecting the lens and the slide. The parfocalled and parcentered design allows for switching objectives without having to realign your sample and without losing focus. The microscope also features a fine and coarse focusing and a platform stage with two spring-loaded coupled slide clips.
To see details of your specimens more easily, the microscope has an LED illumination system with adjustable brightness. The light intensity it delivers is equivalent to that of a 20W incandescent bulb. The white light from the bottom LED emitter is collimated by a 0.65 NA Abbe condenser. Located underneath the stage is a disc diaphragm with apertures of different sizes. It allows you to change the width of the illumination beam which helps you tune the image contrast when using different magnifying powers.
Included with the microscope are three rechargeable AA NiMH batteries, a wall power adapter, a dustcover, and two Allen wrenches for rack stop and eyepiece socket tension adjustment. To recharge your microscope's batteries, just connect the microscope to the wall power adapter.
Achromatic 4x, 10x, 40xR
Objective 40xR is retractable
Total magnification: 40x, 100x, 400x
10x/18mm wide field eyepiece has a pointer
Parfocalled and parcentered
Monocular is 45° inclined
Head rotates 360°
Separate fine and coarse focusing knobs
Slip clutch prevents damage to focusing system
Tension adjustment eliminates stage drift
Safety rack stop prevents damage to slides and objective lenses
Illumination and Power
LED illumination equivalent to a 20W tungsten bulb
0.65 NA Abbe condenser lens with spiral focusing mount
Cordless operation using included rechargeable batteries
Rheostat intensity control
Disc diaphragm with apertures
Coupled slide clips
Objective turret in reverse position
Cast aluminum frame with handles
Gray enamel finish
In the Box
National 205-RLED Cordless Three Objective Single Viewing Microscope
AA NiMH, Rechargeable Batteries
Wall Power Adapter
Limited 5-Year Microscope Warranty
Table of Contents
10x / 18 mm, wide field
4x, 10x, 40xR
Fine / Coarse
Battery / Runtime
3 x AA NiMH, rechargeable / 50 hr max
8 hr minimum
18 x 12 x 11" (45.7 x 30.5 x 28 cm)
8 lb (3.6 kg)
National 205-RLED Cordless Three Objective Single Viewing Microscope Review