This model is a colposcope for gynecology medical applications. The equipment is identical to model MS-131, with the exception that it has a straight binocular head. A useful option is a beam splitter, ccd camera adapter, and ccd camera for taking the video image to a cctv monitor for medical personnel in the room to view, or for the gynecological procedure to be videotaped. Some of the photos show this beam splitter and c-mount adapter, but it is not included in the base price of the microscope.