Not sure about 30D...since I am not a canon user, but : f( ~9 _+ t& R& ]" {3 s 2 J: R+ Y- {7 n# A; x' P! p# N' T. }: MFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu...% a( O2 w4 Z D: [
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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.