Pentax has come thru again. Just recd. the lens today and shot about 30 pics of various topics from infinity to macro. This is a lens with many applications. The sharpness
is right with my DFA 100 mm WR. I heard some AF complaints about focus hunting, but with the manual capability in AF, not an issue. In macro, where I can get a
standoff position on the tripod with my 100mm, you are right on top of the subject with the 50mm. But the 50mm is also easier to hand hold due to its smaller size. Although not as small and light as my M50 macro, its capabilities are so much greater. $419 is not too much for this lens. The hood sucks, but won't use it anyway. So, should I have
gotten the DA 40mm instead for $100 less money? No. I'm sure the 40mm is great, but the 50mm's sharpness and added macro capability fit my requirements.
Maybe the 31mm is next. A few quick shots with my K-5.