NC-117M comparison microscope is a device used to analyze side-by-side specimens. It consists of two microscopes connected to an optical bridge, which gives you the choice of four different observation modes: full right image, full left image, split-image comparison and overlapping mode. NC - 117M comparison microscope is designed for identifying objects structure, comparing similarities and differences between specimens, such as pathological slides, biological slides and so on. It is an ideal instrument for teaching、biological and medical field.