I just got a grey card which comes with a 11 levels grey scale :
L 18.9 | Ev −2 | Ev −1.5 | Ev −1 | Ev −0.5 | L 50 Ev 0 | Ev +0.5 | Ev +1 | Ev +1.5 | Ev +2 | L 98.2
How do I take advantage of this chart to calibrate exposure in post using RawTherapee ? Should I set
L* to 18.9 % on the black end and 92.2 % on the white end ? And are "black" and "exposure compensation" the right settings to adjust ?
This answer to Unclear whether grey card can be used for exposure in post production? provides hints, but RawTherapee's highlights & shadows sliders don't seem to provide the expected effect, and most online resources focus on white balance only.