Thread: Canon Lens
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Old 05-03-2010, 11:00 AM   #24
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Originally Posted by troy12n View Post
the 100-400 uses one of the older IS systems, leaves some to be desired, and AF is slow.AF slowness compared to more modern USM lenses.
It's not the AF thats slow it just has to move a big lens a long way that makes seam slow. If your shooting sports or birds it maybe slow but then it's a F 5.6 to.
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