Not sure about 30D...since I am not a canon user, but- N7 Z, k- G; K$ P1 L- d7 J1 F+ r
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For most of the Cameras, this sound is simulated, and it can be turned off in setting manu.../ i7 n' q$ v1 y3 q# o6 t- N
- Q. e* h/ c* l- f6 AThe shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.