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-RLED-MS also features a rechargeable 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
-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
-45° inclined monocular eyepiece
Focusing
-Separate fine and coarse focusing controls
-Rack-and-pinion focus system
-Slip clutch prevents over-turning
-Tension adjustment prevents focus drift
-Rack stop prevents damage to slides and protects lenses
Lighting
-LED illuminator (20 Watt equivalent)
-0.65 condenser lens
-5-hole disc diaphragm
-Cordless LED illuminator
-Up to 50 hours or runtime on 3 rechargeable NiMH AA batteries
Construction Details
-Clip stage or graduated mechanical stage (optional)
-Cast metal body with inclination joint
-Grey enamel finish
-14″ (36cm) height
-6.8 lb (3.1 kg) weight