Fujifilm's standard cinema pairing on the X- and GFX-series video bodies. Because Fujifilm defines F-Gamut as ITU-R BT.2020 outright, this pairing carries a standard container under a manufacturer name — no Fujifilm-specific gamut transform is required, and linearizing the F-Log curve is the whole of the conversion. It places mid gray higher than any other curve in this base, which protects shadows and leaves comparatively little room above middle gray.
Curve: F-LOG2018
Fujifilm's first log curve, introduced with the X-T3 generation in 2018 and paired with F-Gamut, which Fujifilm defines as ITU-R BT.2020. It places 18% gray at 0.4593, the highest of any curve in this base, leaving only 5.3 stops of encoding above mid gray. That is the trade behind its 13 stops of curve latitude: more of the code range is spent below middle gray than above it, so shadows are well protected and highlight room runs out sooner than on F-Log2.
Gamut: F-GamutProprietary · 2018
Introduced with F-Log for the X-series and later the GFX line. Fujifilm defines it as ITU-R BT.2020 outright — the F-Log data sheet states the compliance — so its primaries are identical to the Rec.2020 record in this base and every one of them is realisable. Being a standard rather than a proprietary space simplifies the grade: no manufacturer-specific gamut transform is required, and only the F-Log curve has to be linearized.
LUTs & References2
