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troy12n wrote:
I was using IS mode 2, btw...
I wouldn't use IS with flying birds - only with stationary ones. The problem being that birds don't usually travel only horizontally or vertically but almost always diagonally, and also with changing speed. Under those circumstances even IS mode 2 does not help. Usually when I get blurry images with my IS lenses it's because IS has been left on for a moving subject (or the IS hasn't had time to settle down).
My advice: turn the IS off until you master BIF. Also, use exposure times shorter than 1/1000s, preferably even 1/2000s. Then you have eliminated two of the most common problems with BIFs.
Also, center point only, AF Servo. Learn to keep the focus point on the bird. It takes practice, practice and practice. AF should be fast enough if you are following the bird and keeping the focus point on the bird, because then it's only doing incremental changes.
Heck, I have been able to follow flying birds with a 10D plus 400f2.8L II + 2x TC! You really cannot talk about fast AF with that combination. Though, the success rate wasn't exactly high (maybe 1 in 10), but that was also due to my inexperience. BIF is a really difficult thing to do.
Edited on Jul 02, 2008 at 09:48 AM
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