The trinocular compound LED microscope 40X-2000X provides darkfield & brightfield microscope system and USB digital imaging system. The darkfield microscope comes with trinocular head, body frame, reversed nosepiece, two pairs of widefield eyepieces, four DIN achromatic objectives, large double layer mechanical stage, 3W LED bright variable illumination (brighter than 30W halogen light), USB camera and darkfield NA0.7-0.9 & brightfield Abbe NA1.25 condensers. It has the par-focal (also called simul-focal) function which means the image is focused through both eyepieces and the photo tube and no view switching is needed The included camera camera comes with advanced software that can make measurement of the samples and color, brightness, white balance and other setting are available. It can also take video clips for live samples through the fast USB2.0 port to share with others. All lenses are made of high quality optical glass. The high resolution image in the field of view is crystal clear and will satisfy the demands of professionals. This trinocular compound microscopy is ideal for professionals and also affordable for students.