I have the G2 with a 45mm, 90mm and 28mm. The 28mm has never been out of focus. The 90 sometimes and the 45 rarely. A working photographer friend of mine has given up on his G2 due to all the out of focus shots he got. Where as i've rarely had a problem with mine. One day i asked him to take a photo of me and my father. It was blurry, then he took another one, it was off center. Its not an easy camera to focus and use at first, and just remember after you've focused DO NOT MOVE. Also it could be the body thats giving you autofocus problems not the lens