Not sure about 30D...since I am not a canon user, but( B, s1 n/ _3 ~9 }7 T P0 L9 \
9 d3 X" d: [' {2 m8 x1 ZFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... % l% F! x4 W! A : z/ @5 s+ R1 q2 iThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.