BTW, nice pictures, Pellicle. I've taken a few shots with my Pentax SMC-A 50mm 1.7 on the G1 (will post some results soon). Bottom line? Not good at f1.7, period. Images were very soft and CA/PF were noticeable on many shots. I also noticed a huge difference in AUTO WB rendering between f1.7-f4 and f5.6 and above (I know WB performance has been addressed in f/w 1.1 AND 1.2 - should we assume that Pana did not get it right the first time??? - but since I still haven't installed the f/w upgrades on my G1, I don't know whether the fix in 1.2 has changed this behavior or not) . The images were much warmer at wider apertures and much colder at smaller apertures. The solution is not to use AUTO WB. Now I'm waiting for the Yashica 135mm and Canon FD 50mm 1.4 lenses I bought a couple of days ago. I'm curious to see if the Canon FD outperforms the Pentax. I think it will.