Technique of high fly calibration screen that allowed me to optimize my videoproj Marantz (very very complicated to do by itself because of the very grd nb parameters), my panasonic plasma, my computer .. a very short best picture every time, as often BUT explis are a little short. The connection to the computer of course. With plasma I had to buy a VGA cable and with the proj parametrage the computer does not seem to me very simple .... but my computer skills are rudimentary!