Bought the Tamron 17-50 VC simply to save $$ over the comparable Canon. The Tamron glass is great and I'm not really noticing any noise. But I also intend to shoot dual audio to the Zoom H4n so camera audio is only relevant for sync. The focus ring on the Tamron is as bad as anything I've ever used-- lots of play and very difficult to achieve critical focus. Have not even unpacked the T2i kit lens.
Ned Soltz
Ned Soltz