The MP4A is a common main objective (CMO)/parallel optics stereomicroscope. It features large depth of field value, large zoom ration, and large field of view. It equiped a pair of wide field, high eyepoint eyepieces which are especially useful for microscopists who wear eyeglasses. The design of seperated microscope head and body makes it easier to add accessories, such as beamsplitters, coaxial episcopic illuminator, and variable aperture diaphragms inbetween them. This CMO stereo microscope is suitable for utilizing in research and development laboratories, and industry production lines as well.