I'm looking at purchasing either a Tokina 80-400, Sigma 135-400, or Sigma 170-500 for my Pentax. If anyone has any suggestions or knowledge of these lenses, please feel free to post them.

Thanks,
Jared

Jared, try a search with "tokina 80-400 lens review" or such, maybe you can find some sites that will help you form an opinion.

Bud, that's basically what I ended up doing. I went with the 170-500. Thanks though.

Jared

Jared, good luck with the lens!!