Cary Knoop wrote:Also the problem with GH5's V-Log prevents it from being used effectively in an ACES workflow. If I use ACES with the GH5 I have a Rec.709 color neutralizing LUT as a workaround which can be used inside the ACES workflow to compensate for the incorrect colors.
unfortunately i have to agree with this summary!
from day one, when panasonic presented the fist implementation of VLog[-L] for the GH4 at a press conference, it wasn't compliant to the proclaimed VLog specification and all the available IDTs. this was quite obvious, because even the curves in the press portfolio did show empiric measurements, which unmissable documented the divergence:
i spend a lot of time to develop my own IDTs, to work around this shortcomings. so i could reproduce and understand this obvious incompatibilities much better after a while, but in practice i also couldn't realize any useful alternative, which really would work significantly better in practice. it's nearly impossible to compensate this kind of imperfectness just on base of empiric camera profiling resp. already processed video data.
i personally didn't trace the relevant debates and measurements in case of the GH5 anymore. maybe panasonic improved the VLog accuracy resp. specification compliance in the meanwhile -- i really don't know -- but i'm quite skeptic, cause of this earlier experiences...