Question Concerning LUTs, Rec709, and Premiere Pro

Question

I am interested in purchasing some LUTs form an established filmmaker, but his website says the following: "Gamut LUTs are designed primarily for Rec709, the standard color space for most displays. If you’re working in Log, you can use our BaseLUTs to convert from Log to Rec.709 before applying any creative LUTs."  My question is whether Rec709 is recognizable within PR if I start out using S-Log when filming?  Newbie trying to understand all the nuances to LUTs and the softwrae on my Sony A7IV.  Thanks in advance for your answers.

R Neil Haugen · Accepted Answer

Rec.709 is the long-established "professional" SDR (standard dynamic range) video format. By the specs, sRGB color primaries, and D65 white point. With the accompanying Bt.1886 addendum specifying a gamma 2.4 display transform.

In other words, the format Premiere Pro was designed to use. So yes, Premiere supports Rec.709 video work.

Using S-log variants, I would suggest not using a LUT based 'normalization' of log encoding to the linear of the display ... use the newly created algorthmic based transforms of Premiere or Reosolve or whatever.

In Premiere, set your color management to ...

Display Color management on.

Extended Dymanic Range on (if on a Mac).

Auto detect Log on.

Auto tonemapping on.

Sequence color space to Rec.709.

That will get your S-log variants 'normalized' safely, and then you can apply the "look" type LUTs in Premiere to your heart's content.

Kevin-Monahan · Answer

Hey there, Richard,Thanks for the question. I posed the issue to the team, so I hope to hear back from them soon. Sorry for the frustration. Thanks,Kevin

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