I checked what the curve would look like with Black at 0.01 nits in HCFR and it starts at 2.22 and ends at 2.35Yes, at least the later ones were targeting sRGB which is defined to use gamma 2.2 (with a 'black compensation' curve characteristic near black). See: https://en.wikipedia.org/wiki/SRGB
Also, btw - if you ever want to create another lut that might move you closer to CRT characteristics, see if you can pick bt1886 as a gamma target an are able to set the black level to 0.01cd/m2 fixed (Important to get a shape of the bt1886 curve that will probably resemble your CRTs gamma curve a little more). Also check, where the Curve lands at the high end. Should be slightly above 2.4. You could also experiment with setting deeper black levels. Just know that at infinite black, the bt1886 curve becomes 2.4 PLG (= flat).
I was reading through the bt.1886 paper and there is an alternate EOTF to match a CRT better, that's different then the 2.4 absolute with a input offset. So two EOTFs are defined in the paper.
Under Annex 1 is the traditional bt.1886 you know. Where on a 0 nit black display like an OLED will result in a flat 2.4 gamma. But the paper states that this does match a CRT.
What we want is what's under appendix 1 (informative). EOTF-CRT matching. The math formula though is beyond me.
I'm too lazy to measure my own CRT so I got some one else's measurements. If you read post #33 someone has provided measurements of a raw BVM.
If you know how to use HCFR or any software that calculates gamma and input all those numbers the average comes out to 2.16. Rounded up is 2.2. And if you look at the curve on a graph it's quite sloppy not at all like bt.1886 with 0.01 nits as the black level.
Last edited by SG854,