Just snagged a K 01 with the DA 40 XS, and this was about the first thing I did after the camera arrived today.
OK maybe not the first thing, but maybe the third...
It doesn't seem to meter, and obviously as the lens has no aperture ring, so it only works at 2.8. But the full frame coverage seems fine...I thought DA lenses only had image circles large enough for APS-C sensors. Coverage looks pretty much identical to the M 40 through the viewfinder--some vignetting, but the image circle seems plenty large. The DA XS looks (again, through the viewfinder) a bit sharper than the M 40.
I'm pretty good with LV/EV, so I don't really need the meter on my camera to work.
This combo seems plenty usable to me. My fiancee won't give me back my M 40, so I guess this will have to be my new pancake
Anyone else try this or any other DA lens on a film camera with success?