Why F2.8? The four photos I looked at were shot at large apertures. My experience with sensors of this size is that they are at their best around F4 or F4.5. I want to see the best the camera will do. I stayed with the A640 from 2006CE because the G series shots I have seen (except the G15 studio shot) seemed only slightly better to me. Is this the better camera? I can't tell here. I know the A640 will do better than this.I live in Seattle, I don't have image stabilization and I routinely shoot around F4.5 at ISO 80.