Not sure about 30D...since I am not a canon user, but \; z9 ~& q: k0 F8 E( [ ( k. ^# _7 T# S0 e M. BFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... . s; [1 j% k; E/ |* H$ {8 L# S/ m( \9 I: m/ E
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.