This is a trinocular compound Siedentopf microscope. It offers magnifications 40X-100X-200X-400X. The compound trinocular microscope includes the trinocular viewing head with interpupillary distance adjustment, body frame, quintuple reversed nosepiece, a pair of widefield eyepieces, four achromatic objectives, large double layer mechanical stage with scales and variable intensity LED transmitted illumination system. The trinocular port is easy to mount photo or video capability.