Quote:
Originally Posted by Alex1994
The aperture makes no difference to the speed of the autofocus. The AF is on the camera, so if it's going in and out it's the camera's fault. If that happens override it manually, at small apertures you will get a good enough DoF for the subject to be in focus.
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I'm afraid you've got that one wrong, if you want the lens to focus as fast as the camera is able you need the largest aperture you can get. A 70-200 f2.8 wil leave a 70-210 f3.5 to f5.6 standing when it comes to low light photography, in fact it will probably leave it standing in all lighting conditions.
nirofo.