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The signal to noise ratio is a scientific measure of the amount of random noise in a digital image. The higher the number the better because this means the level of noise is relatively low. We measure signal to noise in laboratory conditions using DxO Analyzer.
JPEG signal to noise ratio analysis: Noise is well controlled in JPEGs, with results on a par with or just ahead of those from rivals at lower sensitivities and a generally good performance with increased sensitivity, but a sharp drop after ISO 6400.
Raw (converted to TIFF) signal to noise ratio analysis: The raw files tell a very different story. Here, the A68's signal-to-noise ratio is consistently lower throughout the ISO range than the results from competing cameras.
