The sharp, distortion-free 3D images produced by the Greenough optical system, along with a 7.7X to 1X click stop or continuous zoom range, sets the Stemi 2000-C Zeiss Microscope apart from other stereo microscopes. The included 10X eyepieces provide a 6.5X to 50X magnification range yielding a field of view from 35.4mm down to 4.6mm. By adding supplemental lenses and 25X eyepieces, magnifications of 1.95X to 250X can be achieved for this Zeiss Microscope.