Not sure about 30D...since I am not a canon user, but) ]# U& q/ F9 o4 |2 ^$ K) e: G* l0 T
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... ]2 ~/ ?9 V. C. E
1 }7 V5 Z5 [; ^8 d( ~The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.