The one thing lacking from all the 5D MK lll previews is auto focus performance for action photography.
It's an important question.
Six frames-per-second is plenty fast, but how will the 5D track action subjects ? How will it compare to the older-but-popular 1-D MK lln, the 1-D Mk lV, 7D, or others ?
If you purchase a 5D, will you need another camera for action photos ?
Since the 5D will be shipping soon, it's time to talk about auto-focus performance for sports and fast-moving subjects.