Panasonic LUMIX GH5 II Micro Four Thirds Photography Camera

Hybrid Log-Gamma, developed jointly by the BBC and NHK and standardized in ITU-R BT.2100. It follows a conventional gamma curve through shadows and midtones and switches to logarithmic encoding only in the highlights, which is where the name comes from. That hybrid shape is what lets a single signal render acceptably on both SDR and HDR displays without a separate SDR master. It is scene-referred and display-independent, unlike PQ, which makes it the practical choice for live broadcast where the viewer's display cannot be assumed.

Defined in ITU-R BT.2020 in 2012 for ultra-high-definition television; BT.2100 later reused the same primaries for HDR. All three primaries sit on the spectral locus — they are monochromatic — which makes it the widest gamut definable without imaginary coordinates, covering 1.89 times the area of Rec.709. It is a delivery container rather than a capture space. No current display reproduces it in full, so HDR work is typically monitored on a P3 subset and delivered inside a 2020 container.

• ITU-R Recommendation BT.2100 (HDR Television Parameter Values — HLG/PQ)Web ↗

Panasonic's log setting for its LUMIX hybrid bodies, the mirrorless counterpart to the V-Log curve of the VariCam cinema line. Panasonic states that V-Log L's curve characteristics comply with the V-Log/V-Gamut Reference Manual, and its own published figures match V-Log exactly: 0% black at 10-bit code 128, 18% gray at 433 (IRE 42) and 90% white at 602. The difference is the recorded range, around 12 stops against V-Log's 14, which belongs to the bodies that record it since the curve itself is unchanged. In grading, V-Log L material takes the same transforms and LUTs as V-Log, with no conversion of its own.

Introduced with V-Log for Varicam, and carried onto the EVA1 and the cinema-capable S-series. It covers 2.36 times Rec.709, which places it above Rec.2020 by a quarter and above DCI-P3 by three quarters; only its blue primary is imaginary, at y = -0.030. It was sized to contain the common delivery targets rather than to maximize area. The practical consequence is that one capture can be graded to Rec.709, P3 or Rec.2020 without running out of gamut on the way.

• Panasonic LUMIX LUT DownloadWeb ↗
• Panasonic V-Log/V-Gamut Reference ManualPDF