Product Name: Bk Series Lab Trinocular Drawtube Biological Microscope Model NO.: BK Series Principle of Optics: Differential Interference Contrast Microscope Principle: Electronic Usage: Lab/Clinic Shape: Ball, Hemisphere Kind of Light Source: Ordinary Light Stereoscopic Effect: Without Stereoscopic Effect Mobility: Portable Number of Cylinder: Binoculars Type: Biological Magnification: >1000X Item: Biological Microscope Eyepiece: Wf 10X-18 Mm/Wf 10X-20 Mm Obective: Plan /Infinity E-Plan Seidentopf Binocular Head: Inclined 30