So with all the rumors about the Canon 5D III, there is obviously a lot of speculation about what features it may have. I've noticed that when people post their ideas about what they expect in a 5D III body, they inevitably contain some form of "7D AF". I'm curious where that idea comes from. Personally, I see the 5D III positioned very differently, and as far as I can tell very appropriately, in the canon lineup compared to the 1D X and the 7D lines. I see the 5D line as a camera primarily (but not solely) tuned for landscape, weddings, studio, amateur astrophotography (know or know of a fair amount of people who use the 5D II for this), extreme macro (100mm f/2.8 and MP-E 65mm stuff...where low noise large pixel really helps gather the necessary light at necessarily tight apertures) and DSLR video work. In pretty much all of those cases, and many of the more fringe use cases, there does not appear to be a strong need for high FPS and super-awesome AF. When it comes to landscape, astrophotography, and video/cinematography, and macro autofocus is pretty much useless in any respect...manual focus really reigns king. The need for AF for other kinds of photography that you might use a 5D III for such as weddings, generally don't involve the kind of crazy high speed action you might find in motorcross; ski and snowboarding; baseball, football, soccer, etc; even wildlife and bird photography.
Granted, the bottom-rung AF system the 5D II has is definitely not worthy of a professional-grade camera, and NEEDS to be replaced...however is a top of the line AF system designed for AI Servo type continuous tracking of high speed subjects really necessary? Am I missing something in thinking that the 5D III needs an improvement to its AF system, but nothing on the level of the 7D? Am I not fully realizing the primary ways that the 5D II is used that would warrant a high speed AF system, and why a 1D X wouldn't be used instead? I'm mostly just curious, but also wondering if Canon has positioned the 5D line incorrectly according to the people who are interested in buying one and expect a top notch AF system like the 7D's.
Granted, the bottom-rung AF system the 5D II has is definitely not worthy of a professional-grade camera, and NEEDS to be replaced...however is a top of the line AF system designed for AI Servo type continuous tracking of high speed subjects really necessary? Am I missing something in thinking that the 5D III needs an improvement to its AF system, but nothing on the level of the 7D? Am I not fully realizing the primary ways that the 5D II is used that would warrant a high speed AF system, and why a 1D X wouldn't be used instead? I'm mostly just curious, but also wondering if Canon has positioned the 5D line incorrectly according to the people who are interested in buying one and expect a top notch AF system like the 7D's.