Not sure about 30D...since I am not a canon user, but# x" c& K& }8 @
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 0 u( z6 B- g2 R3 _' ~5 i ; w2 F! ~/ S |# q6 pThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.