Not sure about 30D...since I am not a canon user, but! o# N) W, Z! C$ s! X
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...3 R( K1 @) }% L& {2 `# n& [. f
( Y# g% t: A, m7 s& f9 CThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.