Hello David, You didn't mention the body you are going to use. I think that may have some impact on autofocus speed, along with the lens.
I have the Tokina ATX AF version, but have not seen or used the Sigma so can't compare. The Tokina is internal focus and zoom so I would suspect that it wouldn't be slow as far as the lens is concerned. Optical quality is quite good - except at 200mm @ f/2.8. At f/4.0 or a little less than 200mm it is fine. So if you absolutely need to shoot at 200mm wide open, I wouldn't get the Tokina - every other focal length I have tested wide open are fine. Overall it is better at f/4 than f/2.8 at any f stop. HTH, Bruce Sunday, March 13, 2005, 12:49:19 AM, you wrote: DV> I'm looking into buying either the Sigma 70-200mm 2.8 or the Tokina DV> 80-200mm 2.8 lens (the Pentax version is way out of my price range). Do DV> any of you have thoughts on either of them? I shoot alot of action so DV> auto focus speed is really important to me. Thanks for your help, DV> -David
