Hi All
I am looking at hiring the Canon 10-22 or the Tokina 11-16 for use on the 7D.
The f2.8 on the Tokina appeals because of the possible use indoors with only ambient light...............but not so good if you have to stop it down to maintain edge to edge sharpness??? Apart from indoors it will be cityscape usage mostly in narrow possibly shadowy streets.
So TIA for any user insight/experiences of both these lens 
, yes from what I have read so far the Tokina gets some respect.
