Bransford MediaL-Log to Rec.709
Free Leica SL3 LUT (L-Log to Rec.709)
Turns the SL3's L-Log / Rec.2020 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.
Built from Leica's published spec; not yet tested on footage from this camera. If blacks look lifted or crushed, check the clip's data levels.
L-Log, as recorded
With the LUT
The LUT converts L-Log with BT.2020 color, as the manufacturer publishes them, into Rec.709 through the ACES 2.0 output (SDR, 100 nits).
Built from: Leica, L-Log Reference Manual V1.9.
Set up the SL3
- Video Profiles > Profile [1-5] > Settings > select L-Log (lower left). L-Log records in the Rec.2020 colour space.
- Leica lists native ISO 200 and 640 in L-Log. The spec sheet gives manual video L-Log/HLG ISO 50-100,000 and Auto 400-100,000.
Exposure
Leica L-Log Reference Manual: L-Log puts 18% middle grey at 44% IRE (10-bit 445), and Leica's L-Log LUTs are built for that exposure. For best quality Leica recommends exposing to the right, then correcting exposure before applying the LUT. Internal ProRes L-Log uses video levels (64-940); H.264/H.265 use full range.
Sources
- leica-camera.com
SL3 native L-Log ISO 200/640; menu path; BT.2020 colour space; 18% grey = 44% IRE; ETTR advice; ProRes video-levels note; LUTs on Leica website
- leica-camera.com
Video gamma: Rec.709, L-Log Rec.2020, HLG Rec.2020; L-Log/HLG ISO ranges
- leica-camera.com
Leica Pure and Leica Cine LUT downloads (Leica_Pure_Rec2020_LLog_to_Rec709_Gamma24_65.cube) plus legacy LUTs
- leica-camera.com
SL3 announcement, Wetzlar, March 7 2024