Re: BMPCC lack of saturation at 3200K
Posted: Tue Jan 02, 2018 9:13 pm
Yes, my experience also, stage lights are all over the place, from 2800 to 3200 K. That is why you need to do a color temp metering check.
Cheers
Cheers
https://forum.blackmagicdesign.com/
https://forum.blackmagicdesign.com/viewtopic.php?f=2&t=44190
Jamie LeJeune wrote:So ACES needs to change the RRT instead?
Robert Niessner wrote:Regarding tungsten stage light: normally tungsten bulbs for stage usage are rated 2800-3000K, while tungsten bulbs for film are rated 3200K. That is also the reason why tungsten bulbs for film have a lot less life time than bulbs for stage - higher Lumen per Watt.
CaptainHook wrote:
There is some more info with a workaround and examples discussed here:
http://acescentral.com/t/colour-artefac ... aces/520/1
Jamie LeJeune wrote:I'd bet there are external tools that can combine the transforms from multiple LMTs into a single LMT. Perhaps Light Space offers that function?
CaptainHook wrote:Open the DCTL from the ACES link in a text editor and you can see more what i mean.
0.9404372683, -0.0183068787, 0.0778696104
0.0083786969, 0.8286599939, 0.1629613092
0.0005471261, -0.0008833746, 1.0003362486
result.x = mat[0] * p_R + mat[1] * p_G + mat[2] * p_B;
result.y = mat[3] * p_R + mat[4] * p_G + mat[5] * p_B;
result.z = mat[6] * p_R + mat[7] * p_G + mat[8] * p_B;
outRed = (0.9404372683 * inRed) + (-0.0183068787 * inGreen) + (0.0778696104 * inBlue);
outGreen = (0.0083786969 * inRed) + ( 0.8286599939 * inGreen) + (0.1629613092 * inBlue);
outBlue = (0.0005471261 * inRed) + (-0.0008833746 * inGreen) + (1.0003362486 * inBlue);