Not sure about 30D...since I am not a canon user, but + Z+ @2 d! a+ `0 G H2 s. j s# M' t; r& O- v
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... $ D. m( M+ U6 ]- s/ Z ) ~2 D2 r( d- T5 F5 \! L* aThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.