The EF-S 10-22 is a thing of great beauty. The only problem I have with mine is that I tend to walk forwards while looking through it, and more than once I've come dangerously close to falling off harbour walls/cliff edges as a result of its unbelievable ability to make things which are 10cm away look like they're 2m away.
It's a fine, fine lens and it's taken more than one of the recent pictures in my gallery below, should you care to look (that said, all the ones that have made it into my gallery have been fairly heavily processed and cropped so you won't be able to make out the IQ of the originals; you'll just have to take my word for it that it's outstanding).
You don't want to do that! - Mind you, you'd also be able to do that with the Sigma 






