Originally Posted by
MDSurfer
Tokina is not a bad brand name, but there's a reason that off-brand lenses (non camera manufacturers) are generally cheaper. I had a Tokina wide angle to moderate telephoto once, mainly because that's all I could afford at the time, and where I ran into a problem was with the workmanship on the element mounts. In a nutshell, they came loose resulting in shifting focus all through the zoom. I sent it in for repair, but it never really worked reliably after that.
A first quality zoom lens won't lose focus throughout its range of zoom. Since that experience I've always bought name brand (Nikon) lenses and I've never been sorry. Yes, they cost considerably more, but they're worth it in both optical quality AND workmanship. Off brand lenses also have a reputation for edge fuzziness, especially at wide apertures. Tokina, Sigma, or Tameron are all pretty much on their own level. Canon, Nikon, Zeiss and other major manufacturers are on a level of their own, but definitely $$ too.