I aggree with Roman, I live mine too! If you use if for landscapes, becairful with the polerizers, even the thin hoya as you will get uneaven skys. Its real hard to get even sky's with a super wide and polerizer. But, I'd buy it again in a heart-beat! I still use my 17-35 afs because I like to shoot closer to normal, but when I need a wider lens, I dont have any reservations about going to the Tokina 12-24. . .
Tony