I'm obsessing with that discovery. I even took grabs from various videos on vimeo shot with the GH3 and applied the same hue change on the grab. It really gets the contrast of the skin back in play and on par with the contrast of the overall image.

First pic corrected

@yak Nice tests and research. I think you've really narrowed it down with the "red channel" findings. I use RGB curves in Premiere Pro as a final adjustment to compensate for the red channel. I have an interview to film in the next two weeks. Really looking forward to it while applying your latest advice. Thanks much. Attached are much better results on my end in this recent interview. Quite difficult at times as the GH2 and GH3 do not shoot the same at all. You'd think they'd at least be in the same ball park! Not true.

@yak do you think filmconvert, which to my understanding applies a camera and colour profile specific LUT (i.e GH3 natural) correct any red channel brightness issues that the GH3 might have?

@mat33 I don't think it does.

@yak thanks and great work. To correct the red channel brightness in FCPX could you create a secondary colour mask set to red, and then adjust saturation/exposure just for that colour?

Here is a quick test using fcpx colour mask -set to red with global saturation -10% and global exposure to -5% -probably could do with some fine tuning of mask and also adjustments.

@yak

This red channel thing makes sense to me too. I had figured this thing another way. I calibrated my high end plasmatv to show a little less red saturation and lightness. I thought that my plasma had bad calibration but I think this issue is a part of the matter. Thank you for your study.

I go to try that, I follow this topic since any time, todays my GH3 is standard -2,-2,-1,-5 after tried standard -5,-5,-5,-5, what are better ? and after I used resolve to the red... You make a good job, in waitting an hack.

@surfculture at -2 the red channel problem is less apparent but the same amount hue adjustment is needed to correct to skin tones. If we find a good way and apply the exact amount of adjustment needed (hard to figure out right now) there will not be a problem shooting at -5 (in fact will be better for gradability)

I'll continue experimenting with the hue adjustment to create a good LUT .cube file, my first file as too much red saturation. I think the way to do it is to compare the channel of the .mov against the red channel of a RAW picture. As I don't see that problem when shooting raw pictures.

The second step, would be to have the same adjustment in camera, but no hack for now and I don't even know if that is going to be possible...

@lumixmaxgh3 I have not experimented too much with moving the wb ajustment, for the little I did it does not seem to reduce the "brightness" of the red channel, as the red seems to be too bright in the mid tones.

@yak

You are talking about red channel problem but is it more correct to talk about red colors problem. Your correction affects only for red colors, not for all red channel if I have understand correctly.

I am still thinking that part of the solution might be a slight underexposing because that leads to less saturated and darker colors. Then I can use flatter (-5 natural) profilr. It works for me with my displays but I am not sure if my calibration is absolutely perfect. I can add saturation to my plasmatv and there is no skin tone issue for me. I dont still underestimate your issues.

@vesku

I've trying shooting underexposed, still the red are too bright. The issue with GH3 for me was that I've seen hundreds of gh3 footage on vimeo and I've never seen a footage with good skin tone (without crushing the midtones) the skin tones contrast never matches the overall contrast... It's a knows issue that the skin tones comes out a bit chalky.

Now Canon have always had better skin tones, when I apply my "LUT" to a GH3 still, it makes it very easy to match canon skin, did panasonic wanted to have a different video image than Canon?? Maybe...

GH3 | GH3 corrected | Mark3

@vesku I don't have a mark3 it was a test using a video on vimeo... explains the crushed everything, it was just a quick skin tone exemple...

I'll agree it's not the best test, but still... if you look at the colors on the scarf the reds are at a good level vs mark3

@vesku

I agree the GH3 as better DR than 5D. As for skin tones, gh3 is very bad, you need a very aggressive grade to get normal looking skins. I like to grade flat, in fact I LOVE the flat look and when my GH3 image is flat the skin looks like chalk. And when you grade your image the red is may too bright. Try to shoot a RAW picture and compare it to your .mov, you'll notice that the reds are less bright.

I love the RAW colors of the GH3, the jpeg and video colors not so much... until now.