K30 K5 K5II pancake lenses
Well if you want small lenses then the Ltd. series is your way to go.
Digitalversions: 15mm, 21mm, 35mm (macro), 40mm and 70mm. (never used 35mm macro and 70mm myself). They are all good.
Filmversions: 31mm, 43mm and 77mm. (I use FA31mm and that is a fantastic lens).
The other named lenses DA14mm and DA12-24mm are also great, but those are big lenses.