This is a professional grade trinocular compound LED microscope 40X-2500X. It features reversed nosepiece, 3W LED bright variable illumination (brighter than 30W halogen light) and everything an advanced microscope have. 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 LED lamp can be replaced by yourself. The trinocular port is easy to mount photo or video capability. You can add advanced accessories including darkfield condenser and phase contrast kit to upgrade your microscope. 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.