Not sure about 30D...since I am not a canon user, but ; _$ W$ l1 j, T7 w' C5 s q0 H) K$ D# H+ H, T! W5 s
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...# q% {2 ?4 M5 x- {4 h( u4 J
1 {" m' P5 z. \* r9 m7 W& K: lThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.