jcolwell Online Upload & Sell: On
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MaxPollock wrote:
so if I'm using center point and the subject is not in the middle will the subject still be in focus?? I'm going to be using 300 f/4 and 400 f/5.6
No. The point of focus will be in the centre, and so you have to keep the surfer in the middle. You can stray from this by stopping down to increase DOF (as long as you can find a reasonable place to focus), but you lose shutter speed. The 20D isn't so forgiving with high ISO.
Here's a couple of examples from 2006 taken with a 30D and 300/4L IS + 1.4x Extender, at ISO 400. Your 20D will have virtually identical AF and image quality to my 30D, which replaced my 20D.
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