Not sure about 30D...since I am not a canon user, but # k+ I2 g/ z) S0 x2 O3 s3 j; J, I7 d8 B5 \ y% P3 c
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...$ b$ ~& f/ w; `
* v1 e0 q }& v- [/ @The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.