AmScope T400B-LED Compound Trinocular Microscope, WF10x and WF20x Eyepieces, 40X-2000X Magnification, Brightfield, LED Illumination with Rheostat, Abbe Condenser, Double-Layer Mechanical Stage, Sliding Head, High-Resolution Optics Trinocular compound microscope provides high magnification for biological use and educational applications Trinocular viewing head with vertical camera mount and binocular mount with pairs of 10x widefield and 20x widefield eyepieces and sliding head with 55 to 75mm interpupillary adjustment, fixed 45-degree vertical inclination to reduce eye and neck strain, and 360-degree rotation capability to provide a more comprehensive view and enable sharing Forward-facing nosepiece with 4x, 10x, 40xS (spring), and 100xS (spring, oil) DIN achromatic optical-glass objectives that provide color correction of magnified images Brightfield, LED illumination with rheostat to control light intensity, and 1.25 NA Abbe condenser with iris diaphragm and rack-and-pinion focus control for precise focus, clear examination, and light control Double-layer mechanical stage with 1mm stage divisions and stage stop; graduated coarse and fine focus with tension control to prevent stage drift