Ok, light enters the lens (1), bounces off mirror (2), is bounced around in the pentaprism (7) and into your eyeball (8).
If you see a speck while looking though lens, it's not on sensor (99% sure of this).
When you take a picture, the mirror (5) flips up (that's why eyepiece goes dark) and light hits sensor (3 or 4).
If speck is on mirror or prism or eyepiece, it *shouldn't* show up on film. My guess was initially speck on lens but you said it's on both lenses...
The lens is the only constant in this equation so I'm out of guesses.
Anyone else?
Last edited by hyson; 06-02-2007 at 03:57 PM.