Not sure about 30D...since I am not a canon user, but 8 B+ K. C5 U; C1 Q- c ( t- z5 O; _, g4 E$ L/ C; jFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... & r O- p. N4 ]5 P2 _1 j$ \4 q( h; I, i/ a$ F
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.