The trinocular compound siedentopf LED microscope provides phase contrast microscope system & brightfield microscope system and USB imaging digital system. The phase contrast microscope comes with LED illumination with variable intensity, Abbe NA1.25 condenser with iris diaphragm, 5MP USB camera and a complete set of phase contrast kit. The compound microscope features an optical system for observing images through eyepieces and an adjustable trinocular port. It offers eight levels of brightfield magnification from 40X to 2000X. The phase contrast microscope can improve the images of transparent and colorless objects, which are hard to see or invisible in an ordinary microscope. The 2592x1944 pixels USB digital imaging system that captures still microscope images and live video on computer. The included software compatible with Windows, Mac OS and Linux operating system can also be used to make measurements. This phase contrast compound microscopy is widely used clinical, biological, research and schools, specially for observing live cells.