Nice lens, but be careful with the Auto Focus

I have the Tokina 11-16 now since about half a year and I never want to miss it. What struck me from the beginning, is that at least for me, the autofocus in approximately 40 to 50 percent of cases relentlessly beside it. For me this is not very bad, because I have almost always focused especially at this focal length to manually> 2m, because I've been nothing wrong with me :) There therefore not, or almost not affected, I forgive also good the conscience 4 of 5 stars, because otherwise I think it is a great lens.