---
title: "Middle gray"
url: https://postproduction.studio/en/glossary/middle-gray
language: en
description: "The 18% reflectance reference patch — historically the calibration anchor for exposure meters. In log encodings: Sony S-Log3 = 41% code value, ARRI LogC..."
updated: 2026-10-25
---

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# Middle gray

The 18% reflectance reference patch — historically the calibration anchor for exposure meters. In log encodings: Sony S-Log3 = 41% code value, ARRI LogC = ~38%, Canon C-Log2 = ~32%.

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## Related terms

[ETTR (Expose To The Right)](https://postproduction.studio/en/glossary/ettr)[False color](https://postproduction.studio/en/glossary/false-color)