Not sure about 30D...since I am not a canon user, but 6 u1 m9 A2 j4 S( M% }8 t f Z) j- I" T% Y4 r4 }, H/ `
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... : I i, o( V. `) N$ z/ E& G2 w' [% o) y. B# Y1 j
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.