I did this informal test with a friend's camera. Hence it was set on the 4:3 mode. What I did notice was that there is no CA in the shots taken with the 20mm f1.7 lens versus the Nikon 35mm f1.8G lens. Both were set at f7.1. I'm wondering if the GH2 removes chromatic aberration in RAW mode like it does in JPEG mode?