The professional trinocular Siedentopf compound microscope provides darkfield & brightfield microscope system and 5.0MP USB digital imaging system. The darkfield biological microscope comes with trinocular viewing head, body frame, quintuple reversed nosepiece, four DIN achromatic objectives, large double layer mechanical stage, variable intensity halogen transmitted illumination system and brightfield Abbe NA1.25 condenser & oil darkfiled NA1.36-1.25 condenser plus 100X objective with iris diphragm. It offers eight level magnifications from 40X to 1600X. The 2592x1944 pixels USB digital imaging system that captures still microscope images and live video on computer. The included software compatible with Windows XP/Vista/7/8/10 can also be used to make measurements. You can also view and capture the images on iMac or Macbook with Mac OS. This advancedmicroscopy is designed for research laboratories and advanced applications in clinical offices.