Brad Hurley wrote:I'm far from an expert on this, but from what I've read the zebras display a sum of all color channel levels, which means that a particular color channel could be blown out even if you don't see zebras. Most of the advice I've seen says to set zebras at around 70% for caucasian faces, but that's obviously a very rough rule of thumb.
Yes I was looking forward to correcting it in post roughly, and setting the absolute highlisghts to 75% so that the not-so-bright areas of the face would be under 75% zebra aperture, which shoulf give them roughly proper exposure to work with later. My WB was off, but it didn't matter that much in this case.
Mike C Bonner wrote:Are you shooting film or video dynamic range?
What you are trying to do will only work if you are using the video range, where 75% will be 75% of rec709 range.
When you shoot film it displays the zebras as 75% of the entire 13 stops of dymamic range.
It sounds like you put the skin tones not at 75% rec709, but rather more like 110%, and is therefore overexposed. You can do the way described, but when you flip back to film mode you won’t see the zebras where you’d expect them.
My reply to you might still be pending, since I'm a new user, but I'm gonna give a better one now. I was talking about this with a friend, and he speculated it might be similar issue than what could happen with Sony's slog gamma curve. I could not predict how the film dynamic range relates to zebras and everything, since there was no information available about it in the manual. Fine, it might be my lack of expertise, but still giving users basic information about how to expose with a given DR setting with in-camera tools would be polite.
Howard Roll wrote:My second guess would be that you’re using a lut that isn’t expecting your 3 stop ettr on the face and is blowing out skin tones.
Hmm, I just loaded the clip into Premiere and then Resolve, and they both gave the same result without any color adjusting present. Thus, lut plays no role in here currently, although I might be able to compensate with one.
Anyhow, I was able to pull down the highlights in Resolve so that it doesn't look too bad. I think what happened was probably what Mike wrote, I used zebras inappropriately in film dynamic range mode. For my defense, I gotta say the manual could be clear about it. It only states that "setting the zebra to 100% shows which areas are clipped", and goes no further into the subject. Obviously, in this case, that statement gave me wrong impression about the function.