>Because of factors like you describe here, I go thru endless >gyrations plotting which cameras from which to form my ideal >camera kit > >Sometimes I wish I had a simple plan, such as going all FX >like some people do, but alas I'm a wildlife guy on top of >everything else I shoot.
Yep, I had the same problem. I had Canon 5D2 and 7D. I sold 5D2 and got D800e thinking I would sell all my wide angle lenses and buy all new wide angle for Nikon. I did but I also bought Sigma 50-500mm OS for Nikon (I have one for Canon too) and took it to air show. Here I found out that having 7D with 18mps (46mp FF) is not any better than D800 with the same lens. Why? Many reasons. First of all 7D even at 100 ISO is much noisier than D800 at up to 1600 ISO if I pixel peep. Second reason is that with all that "reach" the photos are not any better because the further the object the more atmospheric distortions. So over all I am better off with D800 than 7D for reach. So now I am waiting for Canon to come up with high resolution camera by CES or I am selling all remaining Canon stuff and getting the second D800.