Originally Posted by
Brian500au
I have also used the 17-40 but ended up selling it when I picked up a good deal on the 16-35. I dont use the 12-24 often but when I do it never lets me down.
The biggest problem I had with the 17-40 was the speed inside (where I would use it the most), hence buying the 16-35 to get that extra stop.
I only ever used the 12-24 in good light conditions or where i have access to a tripod.