Not sure about 30D...since I am not a canon user, but 8 V; s3 b, h* B ~$ ~ ( B+ t8 Z: _# J7 A+ dFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu...4 O) F" U. b( E; Q8 O9 y& V8 W6 n
! l# q; y6 l0 L: o* MThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.