I have put the word "loud" in capitals above, as it is referring to the volume of noise when the shutter crashes, not the lack of digital noise (superb) in teh photos. I sold two Leicas and several lenses to afford this camera, and it is great! However, it is literally unusable at quiet events, as the loud bang from the shutter makes everyone turn round! Can't use mirror lock-up, as some of the events are drama, where people move around. I have emailed Canon about this, in the hope that some kind of soundproofing kit is available. Does anyone have any ideas?