Not sure about 30D...since I am not a canon user, but - Z# h6 h' n8 U % M( g9 e3 y Q" RFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 4 D0 S! ^# { H; J. B" n" b* M! w( w
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.