Save $35 now! The National Optical model 131 high-power compound microscope is an outstanding educational microscope. It has set the standard for a high school microscope for many years. It is a student-friendly microscope with all of the most commonly specified features. This high school level microscope is easy to use and provides large, sharp images that will meet the needs of all your students. The excellent DIN optics provide standard magnification levels of 40x, 100x, and 400x. The rugged metal construction with locked-on parts ensures reliable daily use in the classroom or at home. The precision mechanical operation provides smooth, accurate focusing. It is equipped with standard tungsten lighting. National Optical model 131. Lifetime warranty. Ages 8 & up.
National Optical has a long-standing reputation for providing top-quality, reliable microscopes and the 131 is a popular model. Many high schools are equipped with this microscope. This model is also available with LED lighting. Our Home Microscope has comparable features and quality if you prefer fluorescent lighting.
10x widefield inclined eyepiece with pointer
Monocular 45° inclined head with 360° rotation for convenient viewing
4x, 10x, and 40x objectives meet DIN standards and are achromatic, parcentered, & parfocaled to prevent color distortion and stay focused when you switch objectives
Separate fine and coarse focusing with a slip clutch to prevent damage to slides or optics
Sturdy, reliable all-metal rack and pinion focusing
Large 110 x 120mm stage with clips and stage stop (pre-drilled for adding an optional mechanical stage)
NA 0.65 condenser and five-hole disc diaphragm to adjust light for best resolution
20-watt tungsten illumination
Field of view is 4.5mm at 40x
Rugged metal frame, stands 15" tall
Includes operating instructions and a dust cover
Replacement light bulb available
National Optical Model 131
National Optical Model 131 Microscope Product Manual