Not sure about 30D...since I am not a canon user, but & q" h; I- v; ~. {5 c1 m. z% q+ Q5 H
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... : P3 A+ R e+ z) J' T3 W; h+ t7 p( ^2 _/ t; @
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.