Samsung PS50C550 plasma – setting correct color/tint
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Can someone help me please how to set correct colour / tint values for this plasma?
After setting whitepoint, grayscale and gamma were excellent, with some blacks coming darker at 10%. Gamma oscilated around 2.4, the brighter parts were a little brighter, but not coming below 2.2 at any point.
The pre-calibration readings of the color gamut in movie mode ( colourtone = warm2 ) showed that although the color looked not bad visually with settings 50 for colour and G50/R50 for tint, the profiled D3 measured all colours deep down in Chromapure ( colour luminance was below -40% for all colours ) . What would you do in such case? I tried to go up with the colour setting from 50 to 84, all colour luminance improved and red was 0.3 off the target. Other colours improved as well according to the meter/chromapure and went up ( some above the 0%, some stayed below, but improved ). But going up with the colour caused the chromaticity ( chart ) got screwed. I have played back some reference material and the setting 84 for colours ( matching at least red luminance for flesh tones ) caused red and other colours to be oversaturated. That meant, luminance of the could be closer to the targets, but chromaticity was damaged. I have set it back down to 51, using 4 movie sequences, which I know very well. Usually I dont touch the Tint setting, but when calibrating I try go up/down one or two values and checking the secondaries chromaticity changes on the chart. Here I settled for G51/R49, that was not perfect, but 2 the secondaries improved a little in the right direction.
What would you recommend to do beyond my approach to easier determine the correct colour/tint settings?
Copying text from other calibrator who was calibrating US model of the C550 and regarding colours he wrote: “…Color, however, was a bit problematic. As with the Samsung PN-C7000 plasma I reviewed recently, with the color set the way the measurements suggested real program material looked far too rich and colored. Perhaps Samsung has implemented a more aggressive auto color function and kept it hidden in these latest models; but for whatever reason, it is necessary to back off the color from the measured perfect levels in order to have a more natural looking picture.”
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