Hello, Last night, I made a quick test to calibrate a video-projector with my X-Rite DTP92. It seems to work, but I have some problems with light level, and I will have to try differents distances from the screen. Has it is possible to make some single reading with spotread, it is easy to adjust this distance. But how find the optimum ? I displayed a pure white on the screen, which I think have the maximum brightness. What XYZ values should I read on this white to obtain the best accuracy for measures during calibration process ? Thanks, -- Frédéric http://www.gbiloba.org