AmScope T690B-DK-PL Trinocular Compound Microscope, 40X-2000X Magnification, WH10x and WH20x Super-Widefield Eyepieces, Infinity Plan Achromatic Objectives, Brightfield/Darkfield, Kohler Condenser, Double-Layer Mechanical Stage Trinocular compound microscope provides high magnification for biological use and educational applications Trinocular viewing head with vertical camera mount and Siedentopf binocular mount with pairs of 10x super-widefield and 20x super-widefield eyepieces with 55 to 75mm interpupillary adjustment, fixed 30-degree vertical inclination to reduce eye and neck strain, and 360-degree rotation capability to provide a more comprehensive view and enable sharing Reverse-mounted nosepiece with 4x, 10x, 40xS (spring), and 100xS (spring, oil) DIN infinity plan achromatic objectives that provide a longer working distance for improved focus when auxiliary components are utilized Brightfield/Darkfield, halogen illumination with rheostat to control light intensity, and Kohler condenser with two iris diaphragms 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