Not sure about 30D...since I am not a canon user, but 6 K. ?; a; G( h4 u / N: i! H) x* m! ^For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...2 g7 _& X5 i) _/ H- S' ^
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The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.