doc:appunti:hardware:sonoff
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- Date:
- 2020/01/11 20:42
- Filename:
- gwbcc-reference-adjusted.png
- Format:
- PNG
- Size:
- 6MB
- Width:
- 2800
- Height:
- 1760
- References for:
- The Grey White Balance Colour Card: an X-Rite clone