previous posting on how to select lens for the Canon 7D and published a chart to help with choose the lens that could best serve the needs of a photographer. At that time I was contemplating the possibility of acquiring the ultra wide lens EF-S 10-22 mm 1:3.5-4.5 USM, which I did!
I have been using this lens for sometime and it is one of my favorite lens for both landscapes and urban photos. My general purpose lens continues to be the EF 24-105 mm 1:4 L IS USM, but I now carry the EF-S 10-22mm 1:3.5-4.5 all the time!
It controls very well flare and has good sharpness. The focus speed is fast at it is very quite because of the ultrasonic feature.
Click here to see some photos produce by this lens.