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p.1 #12 · p.1 #12 · Can someone help me with AI Servo? Moving subject issues. | |
jcolwell wrote:
With continuous shooting in AI Servo AF mode, the camera actually calculates the relative velocity of convergence or divergence between the subject and camera, and so calculates where the subject will most likely be located when the shutter goes off. That's better than an "intelligent guess". As Peter K.F. hints when he mentions that it should be in continuous shooting mode, the camera can't do this reliably in One Shot AF mode, because it doesn't know when you'll push the shutter button.
Well, semantics aside ("intelligent guess"), we are saying the same thing, aren't we? ;-)
(In my view, cameras with multiple AF points must "guess intelligently," since they cannot, for example, "know" the relative importance of the different points to the photographer. However, I'm happy to instead say that the camera uses algorithms which determine the focus setting for the lens based on multiple AF point data and predictions about the likely location of a moving subject.)
Dan
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