I just finished my ISO tests between 3 mirror-less cameras – Sony NEX 5n, NEX 7, Samsung NX200 and Canon 550D and Canon 5D Mark II. To make it a bit different than other similar tests, I used only 1 lens for all cameras – Carl Zeiss Distagon 50mm f1.4 T, at f5.6. Despite my best efforts, composition vary as well as DOF, and it is only valid for the back ISO chart 12333 part, black board and red paper next to it. So, don’t look at the other parts, as they are influenced by focus differences.
If anyone is interested – pictures could be found at: http://verybiglobo.blogspot.com/2012/01/final-word.html Browse to the bottom of the blog post.
I like this test and saved a few shots on our site just for the memory, all the principal – at the source.
&.. Only it seems to me that the the noise level does not matter if you choose camera?