Quote Originally Posted by Fast Glass
Yes, the mark III is fast enough.A faster cardwill only affect how fast your images unload from the buffer, it does not affect your FPS.

That is incorrect. If the 7D at least as fast as my 5D2 (and I expect it to be faster), then the Extreme III will hit FPS problems 50% sooner than the Extreme IV (I use a stack of Lexar 300X, which is about as fast as an Extreme IV with the 5D2).


Again, for many shooters, the Extreme III will be plenty fast enough to cover their long bursts. But if you want that last 50% (or more), faster cards are needed.