Not sure about 30D...since I am not a canon user, but 1 _) ~0 b( J0 J* }! ]' C {( ?1 W0 v: y* K# r' }+ V1 C) w
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...% S! O2 r% h0 o7 g% Q3 F
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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.