I have often struggled with red objects in my 5d3. I wrote last year about it but did not get any replies. Yesterday while trying out my new 85 1.2 ii, I saw the same issue.
Red flowers come out in an over saturated red haze. The other colors seem saturated just fine, but the reds are over powered so much that the flowers lose detail.
I can reduced saturation in LR, but then the whole image looks washed out... the issue is only with reds.
If I reduce just red (Red channel only) , then it lacks punch, although I get back details in the flower...
Has anyone else observed this?
Looks like your auto white balance is thrown off by the amount of 'green' in the photo (greens look too blue). Try a WB setting of 'daylight' or 'cloudy'. I find this gives the best overall results if shooting in a 'green' environment.
Good tip, but I've seen this even 'as shot' from my RAW processing in ACR. I clip on my reds all the time, and tweaking the WB isn't doing it for me. I end up having to toy with sliders for saturation and (a) waste time doing that and (b) never like the output when I do.
This also isn't limited to strong green backgrounds being a trigger. I've seen this happen on anything with a strong field of red in the frame regardless of background. I am talking about the RAW file and not about picture-style related saturation effects with onboard JPGs.
I'm not a pro. I like to keep my RAW processing time down to around 60-120s per shot, so color is one of the things I would prefer to get right in-camera and only need to run global saturation/luminance changes on in RAW processing. There has got to be a way to manange this in-camera before you clip.
Mackguyver's suggestion (see page 2 of this thread) to use multi-color histo and avoid clipping the shadows is interesting and will be tried out. Is exposure only a global adjustment for auto exposure modes? Is there anyway to run auto-exposure independently for R, G and B? I'm getting a headache thinking about how that would not work -- colors would shift, the metering may not work that way, etc. -- but please sate my curiosity and tell me anyway.