Not sure about 30D...since I am not a canon user, but x; y B2 p3 I) l6 [2 R5 }5 c; H8 E- i% X
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu...9 y+ m+ V. |- V6 D: z
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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.