Originally posted by zapp Exactly, as some as Pentax offers the alternative lens, the other will not sell anymore. 5.6/600 kills the 560, 5.6/500 competes against the 150-450 zoom. Assuming we talk about standard lenses, not a modular setup, diffractive optics or something completely different.
If they could offer the above-mentioned lenses for a similar price to the DFA150-450, I think you are right.
In my case I am hankering for a telephoto prime but a few things hold me back from the DA560, being (in no particular order), size, price, possibility of lens separation (although the DFA150-450 appears to not be immune to that too
). I have to admit, the Nikon 500PF looks mighty attractive.