Originally Posted by SOWK
Kelvin tweaking 5% is ok only if a movie is properly mastered correctly down to 16 for things that "should" be black. Aka most animated movies. On film based movies where "black" in the picture is not as black as let's say the top and bottom black boarders on a 2.35:1 movie, adjusting 5% will make you lose image quaility.
Better to make 2 gamma modes. One that's correct, and one that's slightly raised at 5%. You may need to test in each movie for the best results. But that is kinda annoying to the others is the room... Lol.
Yes I see what you mean, though having a 2.35:1 screen and an A lens I have no black bars to compare against. At least with the Lumagen you can change memories without anyone knowing so long as the output type, resolution and frame rate is the same then the change is imperceptible (apart from the desired change by using a different CMS memory
). To be honest though I've not really found many discs that need the adjustment that you mention and I don't watch cartoons myself. For me the whole point of calibration is that I don't have to keep fiddling with the settings so if a disc has raised black levels, then I just run with it and I usually find that a fade to black seems to go to 16 (or maybe below) anyway.
However, in the light of the comments about what percentage relates to which flashing bars, I think I might be tempted to use the JVC's 5% control and move the Lumagen's 5% control down to 1% to adjust the lowest points I can next time I run a calibration, so thanks for this information.
FWIW I never touch the RGB offsets on a JVC: Raising any of them above 0 will raise the black floor and lowering any may tend to cause the low level detail issues that have been talked about. I've not used the X35's offsets so I don't know if this is still valid however (especially since it has the black level adjust control that my HD350 didn't have).