Zoom Comparison Microscope - By optical zoom, comparison microscope is used for macro or micro comparison of two or more objects in cutting or overlapping view field through one group of eyepieces observing left and right objective view fields. As clear imaging, high resolution, so you can identify the small differences. CCZM-200 is an upgraded product improved on old model, which not only retains excellent technical performances of old model, but also increases its image quality and magnification, increases illumination ways and a variety of accessories, shape, structure more beautiful, reasonable & reliable.