High ISO Compared: Sony A7S vs. A7R vs. Canon EOS 5D III

The A7S is Sony's newest entry in its full-frame mirrorless lineup. But where the 'R' in A7R stood for resolution, the 'S' in the 12MP A7S stands for sensitivity. We've recently received a Sony A7S and wasted no time putting it up against the A7R and Canon EOS 5D Mark III to see how it compares.