Not sure about 30D...since I am not a canon user, but ! l* V- ?& _" O S; q! U1 l* { - {' U4 l7 t4 \8 H+ F) c; sFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu...5 g6 R" M- @! ]' t- W! [
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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.