Sony has claimed 15 EV dynamic range from its newest ILC iteration: the a7R III. Is it true, or is it like Sony’s odd claim that the a7S had 15 EV dynamic range? Turns out: Sony has some strong footing in its claim here.
At the launch event in NYC, we were able to gather enough data to measure the ‘engineering dynamic range’ of the a7R III.* And boy is it impressive. Possibly even more important: for the first time the a7R III retains this dynamic range even in continuous drive. That’s a big deal for sports and action photographers. But how true is Sony’s claim?
The Sony a7R II already had impressive Raw dynamic range, with the ability to expose short enough to keep highlights from blowing, but with low enough sensor noise to lift shadows without too much noise. The a7R III improves on this.
Oh and think this image is too dark? Wait till you view it on a HDR display, which is another can of worms altogether the stills industry should be discussing.
Photo: Rishi Sanyal
Sony has found a way to reduce shadow (or ‘read’) noise in its files such that the final output has higher dynamic range, and cleaner shadows if you need them, than files from its predecessor. To summarize it in a number at base ISO: 13.6 EV at the pixel, or for a 42.4MP file. Or 14.8 EV if you like to compare to DXO numbers (and only generate 8MP images from your 42.4MP camera). Either way, that’s a nearly half-stop improvement over its predecessor. See our table below, which also compares the a7R III to the full-frame chart-topping Nikon → continue…