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This is a test of the camera's noise levels. The higher the signal to noise ratio, the greater the difference in strength between the real image data and random background noise, so the 'cleaner' the image will look. The higher the signal to noise ratio, the better.
Fuji X-T10 signal to noise ratio charts
JPEG signal to noise ratio analysis: These results indicate that the X-T10 controls noise well, especially at the higher sensitivity settings. It also beats the competition at the lowest settings.
Raw (converted to TIFF) signal to noise ratio analysis: Like the X-T1 which has the same sensor, when raw files are processed using the supplied SilkyPix software they achieve a relatively low score for signal to noise ratio - although it still beats the A6000. This indicates that the files are noisier than those from most of the competing cameras.