The National Optical & Scientific Instruments Model 210 Compound Microscope is a cost-effective microscope, designed for use in schools. The 210's defining feature is the 45° inclined monocular, which sits on a viewing head that rotates 360°. Backing up this monocular would be its widefield 10x eyepiece and the DIN standard 4x, 10x, and 40xR objectives which supply 40x, 100x, and 400x magnification.
In addition to the rotating head the Model 210 also features cool running LED illumination. This light produces virtually no heat and has a life rate at 50,000 hours. A base mounted on/off switch controls the light as well.
Along with these helpful features the 210 also has focusing precautions, designed to protect the microscope from over focusing or other rough treatment. The slip clutch prevents damage from too much turning of the focusing knobs, while the safety rack stop prevents damage to specimen slides and objective lenses. Additionally, the tension adjustment eliminates stage drift.
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
3-hole objective turret, reverse position, ball-bearing mounted for smooth, precise changes in magnification
Built-in corded LED illumination, delivers greater light and longer life than standard 20 watt tungsten bulb. Virtually no base heat. 50,000 hour rated bulb
Base mounted on/off switch, heavy-duty 3-wire grounded electrical system and plug
0.5A time delay fuse
Separate low position coarse and fine focusing controls
Slip clutch prevents damage to focusing system
Tension adjustment eliminates stage drift
Safety rack stop prevents damage to slides and objective lenses
4.75 x 5" / 120 x 125mm stage, with locked-on spring loaded stage clips, drilled and tapped to accept optional mechanical stage