Author Topic: Lenses for 550d  (Read 19605 times)


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Re: Lenses for 550d
« Reply #25 on: August 26, 2012, 06:51:00 PM »
Unfortunately you can't make a bad autofocus motor any better. I also use a Sigma 24-70 2.8 (not the HSM model) with my T2i but my rack/follow focus performance is OK. Accurate enough rack focus. It is very noisy and not nearly as smooth as some of my other lenses. The Canon 100mm 2.8 works like a dream, super smooth and very accurate.