To all the people threatening to jump from Canon to Sony/Nikon...
When you bought your Canon camera, it was obviously because you needed/wanted its performance. It was good enough. Now suddenly it's not good enough? Did it deteriorate in quality? You bought a camera because its performance was what sought, and now its performance (which is the exact same as when you bought it) is not good enough? Y'all make me laugh. Hah.
im an advertising photographer that has shot with canon most of the digital part of my career since the 1ds. I love canons lenses and usability of canon cameras, in my opinion the best thought out.
but the canon 22mp files have got me into trouble in several occasions with not having enough head room in the files and not having enough res. So in the past I have shot with phase and a contax when i needed the res and the file depth. Medium format is a dog though, unreliable and slow to work with. I used it, but I hated it.
So a few months ago i brought a sony a7r. I can use all my canon lenses on it, and the file quality absolutely blew away my canon. Not as good as my contax phase 65+, but very close. But the handling of the camera is awful, and the evf is so un-detailed, i really can't see what I am doing. Also, the evf doesn't work at all in even slight dark conditions, it delays and looses even more detail. so on paper its great, but in practice it isn't at all a professional camera IMO.
But being so impressed with the sony a7r, I brought a d800 to test. A very nice camera, easy to use and again, shooting the same shots side by side with the canon 5dmk3, the d800 absolutely blows away the canon file in detail and dynamic range. its like night and day- shoot a subject with strong back light at the same exposure and iso the canon looses the highlights completely, where the nikon pull so much more highlight detail.
I am so sold on nikon files, i am now buying nikon lenses and just got a d810 to shoot. This is even though my favourite lenses by far is my canon ef 50mm f1.0 and 85mm f1.2 (i shoot with a very short dof).
I am so impressed with my d810, I will no longer need to shoot with my dinosaur contax and phase p65!
I am about the last photographer out of all the dozens of professional photographers I know that has now moved to Nikon. Everybody use to shoot canon, now everyone in my industry shoots nikon. Nikon has also also taken medium format photographers away from their old cameras as well. Even the canon shooters I know are quite aware than canon files are inferior- they say they are waiting for canons next camera. But we have all waited too long. I hope canons answer will be at least as good- i would love to go back to canon, but at the moment Nikon is easily the most useful photographic tool out there.