EOS Bodies - For Stills / Re: Dpreview.com: High ISO Compared: Sony A7S vs. A7R vs. Canon EOS 5D III« on: June 22, 2014, 02:21:59 PM »
I think really clean ISO1600-12800 is much more important to many of us than useless high ISO number thrown into the spec sheet of some Sonys and Nikons.
Many would call 12800 unreasonable, too. Personally, if 6400 is clean, that's all I would want or need.
"The Sony A7S enables the use of incredibly high ISOs, including some unavailable to most cameras. When shooting at incredibly low light levels, the A7S will most likely give you significantly better results than any camera that does not natively shoot at these ISOs. There are also some advantages to be had over the higher native ISOs of the cameras we tested: we see the A7S overtake the A7R in normalized shadow noise performance at ISOs above 6400 in our tests. At more moderately high ISOs (6400 and below) as well as in brighter regions of images - where image quality is determined primarily by how much total light is captured - the normalized ISO performance of the A7S will be similar to that of full-frame cameras of its generation."