My understanding is that a given fstop, at a given aperture speed, at a given ISO, at a given ambient light level, should give a similarly exposed image regardless of camera. Correct? Well the e550 seems slow (darker) to me, by at least a couple of stops. In otherwords ISO 400, 1/60, f2.8 which should ordinarily be sufficient for indoor snapshots without flash (am I wrong here, this based on experience), but the e550 images are very dark. Irritatingly enough (though I suppose this goes with their ISO 800 mode which is only available on 3M images), the movie mode is sufficiently bright indoors, even though the still photos are not. Anyone else have this experience?