Originally posted by gooberlx Well, it is a faint high-pitch sound. I'd liken it to the sound of a pinpoint on glass. It does seem to be the dust shake system at startup as the sound is made again when I manually run it.
I guess I'm not sure if it sounds normal or not as I didn't notice it before. If anyone could manually run their dust removal and report back about what it sounds like, I'd be most grateful.
You can check in Setup Menu, page 4, Dust Removal if the "Start-up action" option is checked. If yes, this explains that sound at startup - the dust removal function runs each time when you power on the camera. If you change lenses often during a session, then you can leave it this way, but otherwise it is not needed in my opinion. You can run it manually whenever you think it is necessary.