The AmScope M200B-LED cordless monocular compound microscope has interchangeable 10x widefield and 20x widefield eyepieces, a forward-facing nosepiece with three DIN achromatic objectives, LED illumination, coaxial coarse and fine focus, a 0.65 NA single-lens condenser, and a plain stage. The monocular viewing head has a fixed 45-degree vertical inclination to reduce eye and neck strain, and 360-degree rotation capability to enable sharing. The forward-facing revolving nosepiece has 4x, 10x, and 40xS DIN achromatic objectives that provide color correction of magnified images. The 40xS objective is spring loaded to prevent damage to the slide or objective when focusing. A compound microscope is used for inspection and dissection of specimens when two-dimensional images are desired.

The microscope has lower (diascopic) Brightfield illumination that transmits light up through the specimen for enhanced visibility of translucent and transparent objects. Brightfield (BF) illumination allows the specimen to absorb light, resulting in a dark image on a light background. LED illumination provides bright, cool light for working with temperature-sensitive or live specimens, and a rheostat controls the amount of light emanating from the lamp. The 0.65 NA single-lens condenser and disc diaphragm optimize the amount of light illuminating the specimen. The plain stage is 4-3/8 x 4-3/4 inches (W x D; where W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back). It has an opening for light transmission, stage clips to secure the slide or specimen in place while viewing, and an upper stage stop to prevent the stage or specimen from coming into contact with the objectives. Separate coaxial coarse and fine focus eases focusing for left- and right-handed viewers, and a rack-and-pinion mechanism provides precise and secure focusing. All the mechanical parts of the microscope are constructed of metal to p