@MediumFormatPro Sigma announced that lens, along with a couple others, clear back in Feb. 2011 and that listing on B&H has been parked there ever since. Sigma has removed their old announcement from the news section of their website but it's the same as what's still shown
here. I'm honestly surprised that, with the apparent popularity of the K-5, Sigma never released their 120-300 for K-mount, especially since it's been something of a focal length gap in the Pentax lineup. It'd be nice to see the
150mm f/2.8 macro from them, and their even newer and longer
180mm f/2.8 macro, offered in K-mount. Another comment about Sigma: at the time of that Feb. 2011 announcement mentioned above Sigma was really hyping that their new crop of lenses were "splash proof", but they have since stopped using that terminology and no longer seem to say anything about it. I'm very curious why they no longer want to market this feature. From a pessimistic angle, maybe it simply wasn't very effective and they were concerned about getting in an influx of warranty claims. Anyway, if Pentax/Ricoh can make the inroads into the DSLR market that they've set out to, I look forward to the responses from the various third parties. I'm trying to be optimistic about what's in store for Pentax, and me as a Pentax user, over the next couple of years but I am a little impatient and getting rather anxious and eager to see new products made available. On the upside, having less tempting gear to buy will slow the bleeding of my bank account.