This advanced compound microscope offers phase contrast & brightfield microscope system and 3.0MP USB digital imaging system. The trinocular Siedentopf compound 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, a complete set of phase contrast kit and USB camera with processing software. It offers eight levels of brightfield magnification 40X-1600X. The phase contrast kit includes a phase contrast condenser, a centering telescopic eyepiece, four achromatic phase contrast objectives: 10X, 20X, 40X, 100X. It also offers eight levels of magnification power: 100X-160X-200X-320X-400X-640X-1000X-1600X. The 2048 x 1536 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 be used to make measurements, You can view and capture the images on iMac or Macbook with Mac OS too. The phase contrast microscopy is suitable for doctors, vets, clinics, and researchers.