Not sure about 30D...since I am not a canon user, but ) U* G$ Y; _7 A% ~8 g \8 d8 M: l- c" A0 h, d, Q+ j3 Q+ y) l
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...+ o) x! N" p! C) s) \
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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.