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I wouldn't call 85L "terrible for action", but it's not the most suitable lens for it, and I lump it in the same poor AF responsiveness group with 50 F/1.0, 180L and 800L.
Granted, if the light level is very low, then superfast lenses like 85L and 50 f/1.0 are the only ones that still allow auto focusing albeit slowly.
When photographing action, the key strategy with those slow (or screwy) AF drive lenses is in prefocusing to the distance of the anticipated first contact with the target.
These two shots were done a few weeks ago with 1DsMkII + 85L, at f/1.4 and f/1.8.
I am not sure why is that I haven't shot those with the lens wide open, however, at those distances to target that wouldn't have made any difference.
Edited on Feb 16, 2012 at 09:23 PM · View previous versions