Not sure about 30D...since I am not a canon user, but$ h' h# n3 v" w) @% E( p
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 1 _7 Z$ c+ A1 H0 l+ x( p! s) A( G 4 S( s& @* _: |% b( w, G/ _The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.