5D3 coming. Advice?
Download the user manual and start reading.
Check out the videos and articles on Canon's web site, especially:
(The 1DX and 5D3 have close to the same autofocus system.)-- hide signature --
Oh, thanks for this. I too am a new owner (1 week) and these deeper explanation articles will come in handy. To the OP, I've only used it on only one shoot so far, but I think you'll be thoroughly pleased with your purchase! I came from a 5DII as well and it's night and day.