Not sure about 30D...since I am not a canon user, but ) X' k3 i2 B* F$ d # Q. N$ I0 }0 p/ T9 l7 a/ T4 kFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu...5 Q: n9 A% @+ P9 r
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The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.