Not sure about 30D...since I am not a canon user, but , J. R$ t# X3 K# i$ Z) Q3 i- n % p, W9 ~. Y( X( {0 ]( S# pFor most of the Cameras, this sound is simulated, and it can be turned off in setting manu...9 M' n1 l! f( K8 w
6 h' c1 y. F7 iThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.