Not sure about 30D...since I am not a canon user, but+ ~5 t8 i: T6 \( s8 r
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... ; y* i6 U) K. e5 c j! D/ {2 w6 L+ K: G2 _
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.