Not sure about 30D...since I am not a canon user, but 0 [1 L% U( T$ g5 O, W5 P( C * W/ h$ t7 E" q* D8 o HFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... & E+ F" |7 J) a" i7 N8 @& ~# L" y2 b8 D; @- Z
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.