I completed the color control measurements without the filter attached to the PJ. Though as I've stated above these measurements are relevant to my system only, however, with the many anecdotal reports of reduced color settings improving the perceived color balance I suspect other PJ's are reacting similarly. Both RMS and averge provide the same relative result so I'll only post the average but I've thrown in an additional measurement at -12.
-2, average dE=16.9
-4, average dE=16.3
-6, average dE=15.2
-8, average dE=14.7
-10, average dE=12.4
-12, average dE=14.6
-15, average dE=15.7
So regardless if the filter is installed or not the best color setting which minimizes perceived color error is at or around -10.
Stew M, the filters purpose has nothing to do with manipulating saturation levels. The filters purpose is to bring down excess blue and green more in line with red and do this optically instead of digitally with the PJ's RGB controls. This method of equalzing RGB levels increases contrast ratio. Sorry for the confusion, this thread is dealing with both topics.
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