Not sure about 30D...since I am not a canon user, but ! r' w7 M% x& t# u5 e 0 ]* h# d+ R# s9 ^9 d2 rFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu...$ Y. S& W5 `& j( Y Z/ C' l) Q
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The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.