This is a biological Siedentopf PALN binocular microscope provides both darkfield and brightfield systems. The darkfield and brightfield compound microscope includes a Abbe NA 1.25 brightfield condenser and a NA: 1.36-1.25 darkfield condenser with a 100X plan oil objective lens with built-in iris diaphragm. It comes with a 30° inclined 360° swiveling compensation free binocular viewing head, quintuple reversed nosepiece, four PLAN objectives, large 3-D double layer mechanical stage with scales, variable intensity halogen transmitted illumination system, brightfield condenser & darkfiled condenser, and eight level magnification from 40X to 1600X. There is a wide range of accessories available including phase contrast condensers, USB cameras and carrying case. The microscopy is used by life laboratories, institutes and universities.