F3: LUTcalc: Colourspace transfer LUTs (Sgamut, Sgamut3.cine etc)

[stokstad]

Hi!

So Im making my own LUTs for the original Slog and Sgamut found on the F3 and F35. I mostly work with Sony cameras (A7S, F3, FS7, F5 and F55) and want a quick and client-friendly way of getting:

1) a reasonably close match between the cameras and

2) an accurate transfer from recording gamut into a easy grading space like rec709


I have had success with going from Slog Sgamut into LC709A gamma and gamut but looking for something without a "look" and the transfer in LUTcalc from Sgamut to Rec709 seems to give me alot of clipped colours and such. I made a custom version with less saturation in highs and lows etc. but for example cyan colours still seems to go wild. I think it might be something with how the gamut (and saturation) corresponds to the gamma curve, but would love some input on this!

So basicly I want to build a few LUTs that can fit the bill when grading is gonna be done but not wanting to corner into a look or force the colorist to grade wild Sgamut. Maybe I could just transfer Sgamut into Sgamut3.cine?

Thanks,
Ed

 

[Grug]

Hey Ed,

I've just spent a couple of days building LUTs to do just that. SLOG/Sgamut into SLOG3/Sgamut3.cine for both the F3 and F35. And SLOG/Sgamut into LC709A.

I think they look great. The best 'Rec709ish' colours I've seen yet from the F3 and F35, and they can now be very easily matched to the newer F5(5). In fact I'm doing just that with an F5/F35 shoot I did recently.

If you'd like to have a play with them, just shoot a PM with your email.

Cheers,

Mark

 

[stokstad]

Thank you!

If you would have the time I would also love to hear how you made them, if there was anything specific of interest?