9 out of 10 points and recommendedLow light capabilities, IQ, Works on APS-H (only F1,4-F2,8)Back focus, loud focus (despite HSM)
My favorite lens for low light, family trips, theatre front row shoting! (for back row I prefere the Canon 85mm F1.8)reviewed December 30th, 2010 (purchased for $300)
Happily the backfocus was correctable by my camera (EOS 7D).
That make it a perfect lense!
I find it even sharp from corner to corner even wide open. (unsharp mask in PS; radius 1 Px, 100%, 0 threshold)
The focus can be loud, when it's needed to go from macro to infinity. But its fast enough almost everything.
The built quality isn't perfect, the manual focus ring wobble a bit, but I dont mind as long as IQ is very good. ;-)
I bought it used from Ebay for 300 Bucks.
P.S. It works on APS-H! (only F1,4-F2,8) Iv tested the lens on a EOS 1D MKII but be prepared to so corner softnes!!! The lenshood has to go then.