Not sure about 30D...since I am not a canon user, but 5 _1 k. C* o' J% }+ d- t a( p5 a- Z
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... % q( p7 B( E _2 l5 \& E! c0 u' v : `4 G. Q3 @9 B' RThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.