Regarding Canon's takeover of the pro market segment, I have a little anecdote for you guys. Back in 1990 I bought into the EOS system after being a dia-hard Canon FD user and then briefly a Nikon user. It was only a Rebel that I bought for the wife so she'd have an easy camera to use to take pix of our new daughter. But as is often the case, I found uses for it and came to appreciate that little bugger. But on to the anecdote. As a photographer, when I watched football games on TV, I paid attention to the long lenses the photographers were using. During a game there would always be several shots of the still image pros with their bazooka-sized lenses --- typically 500mm and 600mm light buckets. Well, after becoming an EOS owner, I guess I started paying closer attention to the number of white lenses I saw on the sidelines. Back in the 80s, you almost never saw a white lens on the sidelines. Seas of black lenses. But by 1990 or so, I began to see a change. Suddenly there were a few white lenses competing against the sea of black. And as the years crept by, I noticed the ratio between the white and black lenses steadily shifted in favor of the white lenses. Such that, by the late 90s, the tables were almost totally turned. Occasional black lenses in a sea of white.
And then there was BHO's inauguration in 2008, where one David Bergman brought a newfangled device called a Gigapan to the occasion, and the rest was, as they say, history. He put together a 1,474 megapixel image of the event that you could even zoom in and out on. You'll pardon my mentioning a digital image, please. I do so only to point out the lenses the image captured. So, there we were in 2008, and that big photo showed all those monster-sized lenses on a big tower and more huge lenses in stands facing the Gigapan (and David Bergman) across the open area, as well as the lenses ringing the Gigapan setup -- and still, almost all of them are white. So despite Nikon's excellence it appears that Canon is still maintaining its lock on the pro market -- or at least it still was as of 2008. I wouldn't be surprised if that may change soon though with Nikon finally announcing a new mount. We'll just have to wait and see, I suppose. I think that, ultimately, the end user will benefit, regardless of which system the photographer is using. Cuz Canon's gonna fight to hold onto its market share now that it has a comfortable majority of pros using its products. And Nikon's gonna fight to upset the status quo. And most recently, a new dark horse -- we've got Sony out there now, kicking things up in a major way with its full-frame mirrorless offerings. So things are gonna start getting really interesting, I suspect.