I don't have a plasma to test, but looking at the ramp luminance that Zoyd posted I have to figure the procedure would result in a window that's considerably larger than 2% area on his display. Assuming a 2% window is on a black background, the math just doesn't seem to work for the ramp measure from Zoyd's post. On the other hand larger windows is where you tend to get into problems with variation on plasma. The ramp measurement from Zoyd is rather high, since a 50% gray field on a perfect display is roughly 18%-22% luminance from a theoretical perspective. Even if I had a plasma, I'm not sure if I would consider it worth my time to try tracking down a window size that matched.
Edited by alluringreality - 2/26/13 at 5:16pm