Sigma has announced a release of the Sigma APO 120-400mm F4.5-5.6 DG HSM and the Sigma APO 150-500mm F5-6.3 DG HSM for the Pentax KAF2 mount. The scheduled release date is 14th December 2008. European retailers list the 150-500 at around the 700-800€ mark and the 120-400 at around 600€.

Sigma 50-500/5-6.3
Update: a UK pentax distributor has stated the following release schedule for the 120-400 and 150-500:
120-400 & 150-500 - Due late November. These are SDM lenses but don’t have an image stabiliser built in.
At the beginning of this year, Sigma announced two new tele zooms, the Sigma APO 150-500mm f/5-6.3 DG OS HSM and the Sigma APO 120-400mm f/4.5-5.6 DG OS HSM, both of which were to be available for the Pentax mount.
Pentax users are used to having to wait longer than users of other mounts for third party lens support, a good case in point being the Sigma 70-200/2.8 and Tamron 70-200/2.8, both of which were a long time coming for the K-mount. Now an omission of any mention for Pentax support for these lenses in the Sigma lenses page of Sigma Corporation of America is having some Pentax users guessing, wether the lenses will be available for Pentax at all.
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