Not sure about 30D...since I am not a canon user, but3 Q# F4 i/ J7 n8 x5 \! W
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 1 B3 Y) s- W8 s0 S6 q! v, V" t* O: `& W7 g
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.