Amazing build, Very Sharp, Constant F/4, Great Colors, The AF/MF clutch is actually useful the way its made, Price
I love this lens. I bought it used and its one of my favorite lens. I use it all the time. Its very sharp, the colors on this lens are just amazing...
Ofcourse the build quality of this lens is awesome as well. If Tokina makes lens like this I would not mind buying only Tokina Len's as my Canon alternates...my first experience with them has been great.