True Summilux !
I have never seen pictures as clear using Pan-Leica 25mm on a DMC-GF1, since I stopped using my Leica M6. The color, sharpness, DOF and ability to take pictures without a flash is as everyone has stated before. Once you look at the pictures you know it just feels like the old leica quality. If you ever used a Leica M then you know don't need zoom lens's. A prime needs more work and it brings you back to taking pictures that you had to put more thought into. I can't afford a Leica M9 and I have tried to use my 35mm Summicron on the GF1 and I have to say the summilux is incredible. Besides the size you can't beat. I have the 20mm and there is no comparison and price, it's a summilux do you have to ask. That's truly how I feel.
-o- f stop ring would be nice.