Not sure about 30D...since I am not a canon user, but5 F- O' \2 k6 ^, `! k5 ?
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...) T! d- E2 ?1 b1 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.