Not sure about 30D...since I am not a canon user, but' m, z F# D5 R
. [2 S/ k9 h/ l; U' zFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... m& P) [4 F8 N, `6 k8 T, b3 f5 S, a3 k
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.