Sony Alpha A7S II review

Sony's 12MP full-frame CSC is a great option if 4K video and low light shooting are your thing

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The signal to noise ratio measures the amount of noise in the image compared to actual image data. The higher the number, the less noise you'll see in the camera's images. You'd expect the A7S II to do well here because its relatively large pixels should capture more light relative to the baseline background noise.

Sony A7S II lab tests

JPEG signal to noise ratio analysis: The A7S II is at or near the top of this group for noise levels, but its advantage is slim at best, and even then only at ISO settings of 6400 and above. Even the 42-megapixel A7R II isn't far behind.

Sony A7S II lab tests

Raw (converted to TIFF) signal to noise ratio analysis: These results are dominated by the remarkable and unexpected performance of the EOS 5D Mark II. It beats the A7S II into third place – it's beaten narrowly across most of the ISO range by the Nikon D4S.