Not sure about 30D...since I am not a canon user, but/ K6 R* O S2 `
% S* a2 L# E/ [1 ~For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...- o. ]& W+ w% @- 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.