Comparison Microscope is for Crime Scene Investigation and Forensic Science Analyze and Compare bullets, bullet cartridge casings, scratch marks, wires, fibre, hair and paint fragments. polarization capable includes both polarizer and analyzer for viewing under cross polarization conditions. Two seperate specimens can be studied simultaneously with a split screen viewing. The comparison bridge brings both the beam paths together. The two images of the objects under examination can be observed in the field of view in multiple ways. They can be observed together. Side-by-side, seperated by a thin line that can be moved to either side allowing more or less of either object to be viewed. On the extremes, the field of view can show only the left object or only the right object. The viewing also has the capability to overlap the images, as well as control the amount of overlapping. Includes two photo ports, one for still camera and one for CCD video camera.