Sorry, I don't have any pictures, because I deleted them and returned the lens but should get the replacement in the coming week. Surely I will do some tests with the new lens.
A friend of mine who also has a GX1 had the same problems with three different specimen.
When you see what quality this lens can produce it's a shame having to watch out for the shutter speed, the same thing goes for the 14-42.
Alex
