http://www.sigma-photo.co.jp/news/120420_18-50_28-45_dc_hsm.htm
I think the important meaning of this lens is that Pentax is not yet dead in the eyes of other manufacturers. It has been quite a long time that there is no new 3rd party lenses released for Pentax and in the K-mount. Now, Sigma is there! And yes, now Pentax needs the support from 3rd parties! It is really true..
