Not sure about 30D...since I am not a canon user, but3 P6 z' H1 Z7 b9 g9 w0 V+ x
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 0 s; b* {5 }, r8 W) g7 N+ d* G% [3 P6 q
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.