If you merely lift up on the reflex mirror, one sees that the shutter curtain is light tight (and therefore also air tight) or at least baffled so as to block straight line travel of light rays to the sensor. That is why the sensor clean function is built into the CFn, to give you access to the sensor surface. Dunno how you moved any dust off a surface which is protected from light...more likely the built in cleaning did more than your air bulb.
Thanks for the tip on the curtain, I apparently missed that page in the manual.
Yeah, strange that the dust disappeared. Every time I turn off the camera it does the auto clean thing so possibly that had something to do with removing the few tiny dust specs.
I do have to wonder exactly how air tight that sensor curtain is, though. It looks like a fine/tight mess screen to me.


