The 40X-2500X trinocular compound LED microscope provides both brightfield and darkfield microscope system. The darkfield microscope features an optical system for simultaneously observing images through eyepieces and an adjustable trinocular port. The biological microscopy comes with swiveling trinocular head, body frame, revolving quadruple nosepiece, two pairs of widefield eyepieces, four DIN achromatic objectives, large double layer mechanical stage, LED transmitted illumination system and brightfield Abbe NA1.25 condenser & an oil darkfield NA1.36-1.25 condenser plus 100X objective with iris diaphragm. 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 microscopy is good for teaching, demonstration, clinical examination and research purpose.