Summary: I'll keep this concise. Where I'm coming from: I bought the Panasonic GF1 for its form factor. I was tired of lugging my full SLR rig around (which I still have). I have been remarkably pleased with the image quality the GF1 has when paired with 20mm f/1.7. I really wanted to like this lens. Why I bought this lens: I thought I could make the GF1 become my all round camera. I thought this lens could create a nice rangefinder type feeling like the Leica's.