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Signal to noise ratio is a measure of the noise levels generated by the camera compared to actual image detail. The higher the number the better because it means that random noise makes up a lower proportion of the image data. Signal to noise ratio is tested using DxO Analyzer.
JPEG signal to noise ratio analysis: The 80D performs very well here, indicating that it produces the cleanest images at the majority of sensitivity settings.
Raw (converted to TIFF) signal to noise ratio analysis: Apart from at ISO 100, the 80D beats the 70D indicating that images are a little cleaner – but there's little in it. It also beats the other competing cameras for much of the sensitivity range, only dropping a little behind the Pentax K-3 II and Sony A77 II at the upper few values.
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