I don't pay much attention to the crop factor discussed all over the place. The only SLRs I've ever shot with are Pentax DSLRs so for me, what I see is what matters. Its like some times you don't exactly know what you want, but you do know what you have may not be the right one.
I did try the DA21 for a day. While I thought that lens was superb, I felt it was a bit too wide for my objective. May be I will try a 28mm (on APS-C) when I get my hands on one and see if that's what I am in need of.
Originally posted by creampuff Factoring the 1.5x crop factor, the DA 21 is the lens that's closest in terms of angle of view to a traditional 28mm wide angle on 35mm film.