Not sure about 30D...since I am not a canon user, but : I! J1 V0 z6 Y) b! G1 ?# k8 c, p9 @, b& ?/ o, [
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...; Y, i; W* A1 P# G
+ F7 w- G- S5 D* L# Y$ ~! `% TThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.