I'm new here and I would need some advice regarding AF speed. Now, I know tons of threads regarding 6D vs. 5DIII exist and they usually compare specs on paper. I went to the store today with my 100-400L to test the AF speed since I mostly take bird pictures (you can see my flickr page to have a look at what I do mostly : www.flickr.com/photos/olivierlevasseur
With that said, I mounted the lens and used basically the same settings on both cameras and then put the lens completely out of focus to test the speed at which it could acquire focus.
It was obvious that the 6D acquired focus more quickly although both cameras were spot on.
I know the 5DIII has 63 (or 61) AF point compared to the 11 points of the 6D, but what matters most to me is the AF speed and I was kind of skeptical about my finding.
I've never used a 5DIII before and some AF settings may have been changed in the menus (I know there are a lot of customization options in there)
Basically I wanted to know if somebody had the 100-400L on either these cameras and could comment on AF speed in real life. Regarding tracking birds in flight, I usually use center point.
Thank you very much, any input would be appreciated, and sorry for another debate thread between those 2 cameras.