... sense, Distinct gradations, Wide view, GY-2200B Colposcope Digital Imaging System(1) Optical system is five gears ,zoom ,and focus, Strong ... light splitting grating design and the sole CCD imaging vernier device ,making the screen form the three-dimensional ... imaging, and all the different levels diseased region tissue can gain the best observation effect. GY-2200B Colposcope Digital Imaging System