Bransford MediaS-Log3 to Rec.709
Free Sony FX5 LUT (S-Log3 to Rec.709)
Turns the FX5's S-Log3 / S-Gamut3.Cine footage into normal-looking Rec.709 video. One .cube LUT, free for any project, no email.
The zip holds the same LUT twice: a 65-point file for editing, and a 33-point file for monitoring on a camera or in an app, or for older apps that won't load the larger one.
Checked against Sony's own LUT and tested on our Sony FX30 footage.
S-Log3, as recorded
With the LUT
The LUT converts S-Log3 with S-Gamut3.Cine color, as the manufacturer publishes them, into Rec.709 through the ACES 2.0 output (SDR, 100 nits).
Built from: Sony, Technical Summary for S-Gamut3.Cine/S-Log3 and S-Gamut3/S-Log3.
Set up the FX5
- Project > Base Setting > Shooting Mode: Flexible ISO / Cine EI Quick / Cine EI (log); Project > Cine EI/Flexible ISO Setting > Input Color Space: S-Gamut3.Cine/SLog3 or S-Gamut3/SLog3
- Base ISO in log modes: ISO 800, ISO 4000, ISO 12800, or ISO 800 (Dual Gain); Cine EI Quick picks it automatically
- Preset LUTs s709 / 709(800%) / S-Log3; 3D LUT import supported
Exposure
Sony: in Cine EI, shooting at an EI equal to or lower than the base ISO is generally recommended (shoot at EI = base ISO for least noise and most latitude). FX5 help guide recommends keeping a fixed Exposure Index while recording in Cine EI / Cine EI Quick.
Sources
- helpguide.sony.net
Log shooting modes, Input Color Space options, fixed-EI recommendation
- helpguide.sony.net
Base ISO 800 / 4000 / 12800 / 800 (Dual Gain)
- helpguide.sony.net
Preset LUTs s709 / 709(800%) / S-Log3; 3D LUT import
- sony.mediaroom.com
Sony press release July 22, 2026; S-Log3 15+ stops; three base ISOs
- helpguide.sony.net
Sony Help Guide for Creators (Cine EI): 'In general, shooting at an EI equal to or lower than the base ISO value is recommended'; EI settable within +/-2 EV of base ISO
- helpguide.sony.net
Sony Help Guide for Creators (Exposure Index): 'To record with the least noise and most exposure latitude from the camera, shoot at the same EI as the base ISO'
- support.d-imaging.sony.co.jp
Official Sony S-Log grading guide; offers s709 3D LUT downloads (s709Cubes.zip: SL3SG3Ctos709.cube, SL3SG3tos709.cube) and P3 versions for S-Log3 with S-Gamut3.Cine or S-Gamut3. Page text names ILCE-1/ILCE-7SM3, but the LUTs are per profile (S-Log3). Zip download confirmed.
Recording a different profile?
- Download the S-Log3 / S-Gamut3 LUT
Checked against Sony's own LUT and tested on our Sony FX30 footage.
About S-Log3 / S-Gamut3