Not sure about 30D...since I am not a canon user, but d1 D- L% e! |0 u9 t7 h
& x" S) ~; k/ }3 xFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu...+ O- v6 e, S, A; n
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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.