Not sure about 30D...since I am not a canon user, but: `. V6 P1 k+ n
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...& |& X3 ]# a4 K. A$ ~) A3 _
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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.