Not sure about 30D...since I am not a canon user, but$ \& O ?' |. X& ?& L
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 6 i, l) j+ n! o * k: I5 W# ~- uThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.