This is a 3.5X-90X zoom magnification trinocular stereo microscope body which needs a stand to work with. This microscopy head includes two pairs of extreme widefield eyepieces (WF10X and WF20X), a 0.5X auxiliary objectives lens and a pair of rubber eyeshields. It comes with 45 degree inclined 30mm eyetubes with diopter. It can work with a camera (sold separately) to record what you see in the microscope and saving it into your computer as a picture or a video clip. With the 0.5X barlow lens, the working distance can be as long as 6" (152mm), and the field of view can be as large as 1-3/4" ( 44mm) in diameters. This microscope head fits a boom stand or regular stand with a 84mm (in diameter) ring holder.