Not sure about 30D...since I am not a canon user, but 0 B% D" Y I% ]& d6 r' [ 9 o# s8 n% L% @( a1 w- s# i0 aFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 2 W( P& M! G. `; K( N3 f5 |2 u5 c; P1 U
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.