Here is something interesting about the AF systems. This picture was shot with the 50D and a100-400mm Lens with an off brand 2x extender. The exif data says that it was shot at 400mm at F9. In reality I was fully extended so it should have been F11. I guess the camera didn't noitce, but it focused just fine.


It makes me wonder, reading the link above when it says it will not focus with lenses it reads as F8.....if at least the old bodies they can't be fooled in to doing it.


Not to bad for a camera that isn't supposed to AF with an F/11 combination. You can read the exif data on the site, the camera didn't have a clue what the real settings were.








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