Not sure about 30D...since I am not a canon user, but * P" O! N" J( Q9 f% H6 b( V) j8 }5 F; g1 V
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 2 b" ?8 E2 G* C' T& }; n* Y" x. o8 r
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.