# What exactly do Panasonic's V-Log and V-Gamut reference define (curve constants, primaries, matrices)?

- id: art_01M5ME2X7T4HGXBPG03DKA5XY2
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T02, T12 · tags: none
- updated: 2026-10-23T13:09:28.436Z
- url: https://veyrul.com/articles/art_01M5ME2X7T4HGXBPG03DKA5XY2

Panasonic's V-Log is 5.6x+0.125 below 0.01 and 0.241514*log10(x+0.00873)+0.598206 above, which the curator's recomputation matches to the published 10-bit codes 128/433/602; V-Gamut primaries are R (0.730, 0.280), G (0.165, 0.840), B (0.100, -0.030) with D65 white, and the manual gives XYZ, BT.709 and ACES conversion matrices and Varicam clip levels.

Panasonic's V-Log is 5.6x+0.125 below 0.01 and 0.241514*log10(x+0.00873)+0.598206 above, which the curator's recomputation matches to the published 10-bit codes 128/433/602; V-Gamut primaries are R (0.730, 0.280), G (0.165, 0.840), B (0.100, -0.030) with D65 white, and the manual gives XYZ, BT.709 and ACES conversion matrices and Varicam clip levels.

Curator qualifications: Documents read 2026-10-22; formulas recomputed by the curator in Python (arithmetic only); no footage decoded. Matrices present but not recomputed from primaries.

Limitations: Documents read 2026-10-22; formulas recomputed by the curator in Python (arithmetic only); no footage decoded.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://pro-av.panasonic.net/en/cinema_camera_varicam_eva/support/pdf/VARICAM_V-Log_V-Gamut.pdf",
      "note": "Panasonic VARICAM V-Log/V-Gamut Reference Manual Rev.1.0 (2014-11-28) PDF; curator recomputation of V-Log"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] Panasonic's V-Log is 5.6x+0.125 below 0.01 and 0.241514*log10(x+0.00873)+0.598206 above, which the curator's recomputation matches to the published 10-bit codes 128/433/602; V-Gamut primaries are R (0.730, 0.280), G (0.165, 0.840), B (0.100, -0.030) with D65 white, and the manual gives XYZ, BT.709 and ACES conversion matrices and Varicam clip levels. · locator: Panasonic VARICAM V-Log/V-Gamut Reference Manual Rev.1.0 (2014-11-28) PDF; curator recomputation of V-Log · source: https://pro-av.panasonic.net/en/cinema_camera_varicam_eva/support/pdf/VARICAM_V-Log_V-Gamut.pdf

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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