2 Camera(s) + lights. If you use flashes (you should) then you can use still film cameras (35mm) or heavyly shuttered CCDs. The resulting stereogram can be analyzed later or in real time by a computer. You can use one or several PICs for timing purposes and flash control. The technhology belongs to high speed photography and imho you should look for books on that. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics