All they Canon is saying in the manual is that Zone AF has the tendancy to track the closest subject over all of the points in the group. So it could be a problem if you were shooting say soccer and the ref ran between you and the player you are trying to shoot. Autofocus may lock onto the ref and lose tracking of the player. The samples RG had problems with were not because of this. He was tracking a running dog with nothing coming between him and the dog. Nikon had implemented this same Zone Autofocus back in the D2H (they called it group dynamic) and it also worked by tracking the closest subject. This was later modified via firmware with new options to change how it behaved.
All they are saying is that Zone AF has the tendancy to track the closest subject over all of the points in the group. So it could be a problem if you were shooting say soccer and the ref ran between you and the player you are trying to shoot. Autofocus may lock onto the ref and lose tracking of the player. The samples RG had problems with were not because of this. He was tracking a running dog with nothing coming between him and the dog. Nikon had implemented this same Zone Autofocus back in the D2H (they called it group dynamic) and it also worked by tracking the closest subject. This was later modified via firmware with new options to change how it behaved.
Sep 04, 2009 at 02:37 PM
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