Saturday, August 29, 2009

Canon's Back-Button Auto Focus


Andy Schleck
Originally uploaded by annick vanderschelden



Canon's Back-Button Auto Focus
This link explains this feature very well.

In this picture you notice cyclist Andy Schleck. Back-button allows you to turn off the AF momentarily if something interferes with the subject you're tracking. For instance in this case there could be another cyclist, a colleague photographer and so forth between the lens and the cyclist.

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