Stealthy Ninja wrote in post #8372796
CF may be faster etc. but you know the way of these things. SD will probably take over anyway.
It is a bit annoying that Canon don't put the 1D AF system in lower cameras, but honestly for me personally, I don't think it matters. For some people it would.
If I were doing sports (which I don't do much really) I would probably have kept my 40D.

CFast is a new version of CF, based around SATA instead of PATA, much faster and it deals away with the weakest part of the CF package, the pins...
Moving on...
Well one reason as i understand is they cant fit the 45-point sensor in the 1.6x Crop cameras...the mirror box is not big enough or something along those lines according to one Canon rep..
The entire reasoning on the new 60D specs that leaked out at CR earlier today even states that Canon didnt want to get a new AF system -entirely- because of the AF assist on their flash units, They're only designed to cover 7, 9, or 45 points....so the new AF system had to somehow conform to that...That makes sense to me, it would really suck if you had to buy a new flash unit to get Assist back on your new body...
What they're suggesting is a 19-point trimmed down version of the NEW 45-point AF in the new 1D which would allow the Assist system to just use its 45-point config to flood the area...
Basically its similar to my idea, the big difference between the 1D AF and the xxD AF is going to be the 26 assist points, And thats fine by me!
So my guess is the new 45-point AF sensor for the new 1D is slightly smaller or designed to also fit into the mirror box of a xxD, this also may explain the slightly larger viewfinder in the rumor as well [To accomidate it..] Since the current 40/50D viewfinder is as big as the 1D Mark IIs...this actually makes sense