Originally posted by zjacreman Wides are harder to design well than telephotos are, and there aren't a whole lot of existing third-party wides to license.
That's an interesting theory, but it doesn't explain why one of the three lenses to be released next year is a very ambitious APS-C wide angle zoom. I can think of three possible reasons why Pentax has made the DFA 70-200/4 a priority over seemingly more needed useful lenses like a slower aperture wide angle zoom or a DFA 24-120/4 and why the DFA line-up is turning out to be so telephoto heavy:
(1) FF telephotos are more likely to be used, not merely by FF users, but by APS-C users as well. So a telephoto lens can equally serve both systems. Of course, theoretically, you can use an FF wide angle zoom or standard zoom on APS-C as well, but realistically, how many people are doing that? My guess is that there will be a lot more APS-C photographers using the DFA* 70-200 and DFA 150-450 than the DFA 15-30 or DFA 24-70.
(2) Perhaps Pentax has received a lot of complaints about the size and weight of the DFA* 70-200 (it's the heaviest such lens ever made) and they feel need to address these complaints as quickly as possible with a lighter version covering the same range.
(3) Perhaps Pentax feels that there are better legacy options on the wide end of things. Other than the FA* 80-200 (and the heavy and rare F/FA* 250-600, none of the AF telephoto zooms in the system are all that inspiring. In any case, none of them are as good as the FA 20-35, F 17-28, or even the F 24-50.