Originally Posted by
Dallasphotog
AF performance is an interesting question...
I own 4 Canon bodies (XT, XTi, 1D MK II, 5D MKII) and use 3 additional Canon cameras (XT, XSi, 1Ds MKIII) at work. I feel like Ihave pretty broad experience with the different bodies. I sure have a feel for what each onedoes well.
The answer everyone would expect is that the AF performace and frame rate of the 5D MKII is inferior to the 1-series and not well suited for sports, but that just isn't my real world experience. I wish I had a 1D MKIII or a 1D MKII N to add to the comparison, butwith the bodies I own and use, the 5D MKII is the best sports camera. I really like the frame rate of the 1D MKII, but I don't find itfocuses more accuratelythan the 5D MKII. I'm surethat the 1D MKIII gets some shots at 10 frames per second that I'm missing, but the5D's high ISO capability combined with the insane level of cropping its images support makeit the camera of choice for me.
I know there are lots of technical reasons the 1DMKIII should be a better sports rig; weather sealing, faster frame rate andmore AF points come to mind, but I prefer the 5D MKII in all circustancessavepouring rain.My personal experience with the 5DMKII has me tossing about 5% of my shots due to focus and that isabout the same level I get with theID MKII.
The big advantage of the 5DMKII is the quality obtainable at high ISO which allowsaction freezing shutter speeds through long lenses on pourly lit fields.
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