Not sure about 30D...since I am not a canon user, but N# Y% ^5 s4 Y& f! R1 C' H: K' }8 M: I
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 7 b6 n# d4 K5 d) @. Z. Q5 D' ?8 N h5 c5 A5 [
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.