Not sure about 30D...since I am not a canon user, but/ o5 ~. ~# a2 k' X
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... ' Q2 f2 }4 I3 ^7 n8 n# J( b * j6 r) G) e" A" t) m! P4 ~9 AThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.