Quote:
Originally Posted by The1
dave, do you know if the 1.4 TC still focuses on a 100-400 L series? I know the 5.6 is a little on that high side, but i just wasn't sure.
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It'll only AF with a "pro" body, like a 1D MkIV. I had a 400/5.6 and that had the same problem with my 7D and 5D MkII. You need to start with f/4 and the 1.4x will take you to the f/5.6 limit.