Stereo microscopes are also known as low magnification and dissecting microscopes. BS-3020 Stereo Zoom Microscope on a post stand offers upright, un-reversed 3D images that very clear throughout the zoom range. Optional eyepieces and auxiliary objectives expand magnification range and working distances.BS-3020 is a very popular zoom stereo microscope. Optional cold light and ring light can be chosen for this microscope. You can also choose trinocular head to add digital camera with the appropriate camera adapter. In summary BS-3020 gives many range of magnifications, working distances, photo options, accessories and is very convenient to use –no wonder it is popular!