Not sure about 30D...since I am not a canon user, but+ f& ^0 P" m/ d4 z b. O9 g7 \7 f" w
- Z0 J5 p3 C: b' dFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu... ! b q) f2 \ v$ ]6 C) x$ s7 k4 Z. i3 E3 o& G
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.