dpreview, "Highly Recommended", 2009/04
The ZUIKO DIGITAL ED 9-18mm 1:4-5.6 is without doubt a very good lens indeed, especially for a relatively inexpensive ultra-wideangle zoom. It's sharp even wide open, has negligible distortion, and shows practically no vignetting. Indeed it's a delight for pixel-peepers looking for high levels of sharpness right across the frame.