All I can say about Canon, is that when you have 25 French Nuns and an Orchid room together for once in your career and you turn your command dial and it comes off in your hands, don't say that I never said that it happened to me.
Technology is swell, but reliability is important.
Canon's customer service was not satisfactory to me, and the fact that the command dial issues are well known and documented seems to matter not one bit to them.
In fact, they were defensive and nasty when I mentioned it.
The folks whom I spoke to on the phone lied about what I was to expect at the service center.
The D5 full CCD is interesting, but the fact that the camera has no enviromental seals makes it a non-contender to me at it's price-point.
I think that it is the only full-frame that they have out to date.
Certainly more full-frames to come.
To revisit the 1.6X issue, one last time, if I can...for clarity, the framed image that you see is 1.6x smaller, however magnification remains the same.
Because we compose by field of view, rather than magnification, FOV is considered the more critical element.
Has anyone used a CMOS-based camera, like the Sigma?
It was a hot contender for me, but I really liked one of my Tamron lenses, and wanted to keep my options open. I saw the Sigma as more limited on lens choices.