K30 K5 K5II pancake lenses

Hi guys,

I just sold my beloved Fuji X100, and will buy a new K-30 this week.

I'm looking for compact lenses in order to fit the camera in a small bag when I don't want to go around with "classic" size dlsr lenses

I'v seen on Pentax forum the 40mm f2.8 but on a dx format that's a bit too long for being a all around lenses (I prefer something around 35mm equivalent like my Fuji X100, possibly f.2, f.2.8)

Do you know any compact lens pretty sharp that I can consider al an all around lens? Also legacy lenses or old lenses..

Furthermore, I will buy straight after a super-wide lens, I've seen the 15mm limited and the 12-24, both seem very good.

Is there any other legacy lens / aftermarket wide-angle (possible prime...around 12mm??) that you can suggest me?

thank you guys!!

p.s. any of you own also the X100?