Sigma has just officially announced the new "contemporary" series 17-70mm F2.8-4 DC Macro HSM walkaround lens for Pentax. It is now available for pre-order for $499 (about the same price as the Pentax 17-70mm).
This is the third Sigma 17-70mm lens, which promises to bring better optics and improved build quality compared to its predecessors. In our in-depth comparative review of the Sigma 17-70mm's and Pentax 17-70mm, we found both Sigmas to already be a little bit better than the Pentax, so we can't wait to test this new lens, as it already seems like a compelling option for an everyday zoom!
For the full specifications of this new lens, please visit its entry in our Sigma lens database.