Watched the in depth review of CVP yesterday for the new Alexa 35 camera.
I was very impressed overall by the specs and most notably their new camera native gamut which places itself neatly inside AP0 for better compatibility.
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The spec for the primaries and the new curve is out: https://www.arri.com/resource/blob/278790/bea879ac0d041a925bed27a096ab3ec2/2022-05-arri-logc4-specification-data.pdf
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Attached Nuke node for ARRI LogC v4 conversion and GamutConvert_Live node with AWGv4 conversion included (based on Jed’s nuke-colortools nodes). Should be correct, I did check against the reference values in the spec.
LogConvert_Arri_LogC4.nk (1.7 KB)
GamutConvert_live.nk (14.0 KB)
Few familiar images through the v4 Rec.709 (ALF4) and v3 Rec.709 (ALF2) ARRI LUTs.
v4:
v3:
v4:
v3:
v4:
v3:
v4:
v3:
v4:
v3:
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How could I get this log transform in to a lut I can use in OCIO?
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Attached small Nuke script to generate LogC4 to linear 1D LUT. You can export the LUT with the Sampler node’s Export tab. You’ll have to add that LUT then to your OCIO config.
LogC4_to_linear.nk (44.8 KB)
Thank you very much Pekka.