Not sure about 30D...since I am not a canon user, but( w8 P+ X3 }* h. W5 z2 R4 v
: z8 M+ q" Y& `) H" M9 L
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...! U% Y9 P( s7 Z7 t1 x
9 U$ v$ E5 E [
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.