Glossary
Log profile
A video gamma curve that records a wider dynamic range than standard Rec. 709, requiring color grading in post-production. Standards include S-Log3 (Sony), C-Log (Canon), N-Log (Nikon), V-Log (Panasonic).
A log profile maps a much wider scene dynamic range (12–15 stops) into the same 8 or 10-bit container by using a logarithmic transfer function. Footage looks flat and gray straight out of the camera; the grade restores contrast and color.
Why use it
- Highlight retention. Pull back skies and bright skin without clipping.
- Shadow detail. Lift dark areas without exposing noise.
- Match cameras. Different log profiles can be converted to a common color space (ACES, Rec. 709) for multi-cam shoots.
Considerations
- Bit depth. Log needs 10-bit minimum; 8-bit log produces banding in graded skies.
- Workflow cost. Every clip needs a grade. Iterative work; not "shoot and post."
- Exposure discipline. Most log profiles are designed for 1–2 stops over-exposure ("ETTR") to keep shadows clean.
Where this matters
Categories that use log profile
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