Originally posted by twitch DA12-24 + lightroom is a superb team
Listen to Twitch, he knows his Pentax gear!
When I got into photography, my very first order was in early 2007. I got a K10D, Tamron 28-75, 50/f1.4, 50-200 and the DA12-24.
The DA12-24 is the only lens I kept out of those four.
It is truly a GREAT lens and has so many applications. Coupled with LR4 and its PV2012, providing you shoot in RAW, you can get amazing results.
It's not fast though, so not appropriate for low-light walkaround photography.