Not sure about 30D...since I am not a canon user, but - W! z( U; c9 ?' `0 M & A7 `/ W1 B# A; m Q; y1 f, a6 mFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 6 }- Y3 l& L6 S4 @& Q8 x+ M, g, N1 f! B2 q9 T# c
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.