Originally posted by victormeldrew unfortunately it's yet another third-party that no longer supports Pentax, which is another entry in the 'cons' column when weighing up buying one.
True. Yes, the last AF lens maker (Sigma) has left Pentax 5 years ago. But one would have thought, that providing "dumb" i.e. just-mechanical mount variants is such a little extra effort for a MF lens maker, that they could afford to throw in a Pentax batch then and when. That even that starts to cease, is alarming.
The root problem is that Pentax seems almost dead with regards to overall lens sales, at least according to Amazon.com DSLR lens sales ranking. It is pretty devastating to see, that Pentax' best-selling lens (which was/is the cheap DA 50mm 1.8, for ~$120) is down at rank #531 nowadays! This is nearly as dead as dead can be. It seems that the dooming gains speed now, sadly. Assuming that lens sales is an overall brand health indicator.