In the past few days I had an opportunity to test out a Canon EOS-1D X with 800mm f/5.6L. These pictures are straight out of the camera no PS work. I hate to say that this camera is better than a new Nikon D4. Canon have but a new sensor version, and upgraded processing channels from 8 to 16 into this monster. I did not test out the video on this camera, so I'm not sure it better than Nikon D4 or not. There's couple things I like about this camera is that the auto focus, and the colors rendering is better than D4. The frame rate on JPEG is about 4 frames more than D4, this is a plus for sports and wildlife photographer. After I have played around this camera, I think I'm going to do the inventory on my Nikon gear to post on ebay, and excuse myself from this Nikon blog. lol.