pakman
Contributor
cfelliot, take a look at the Sigma 18-50mm f/2.8 (EX version). Real nice lens for half the price of the Canon equivalent. But doesn't have USM. It's my primary walk around lens and it does pretty well u/w as well...
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alcina:12-24 range Sigma, Tamron, Tokina These should have been on my previous list. I do not have them but know lots of shooters who do and love them to bits. Worth looking at if you think the 10-22 range lenses are just too wide for your needs right now or out of your price range.