Not sure about 30D...since I am not a canon user, but9 j @# o$ e+ B& ]
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 7 U& q( z' F0 N. M8 z6 a 0 B m4 z+ ~, }/ T2 l& ?The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.