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Author Message   Sillyconguru Tinkerer Username: Sillyconguru Post Number: 15 Registered: 12-2007 Rating: N/A Votes: 0 Posted on Sunday, August 03, 2008 - 11:28 am:    If the transition from black to correctly exposed is gradual (as you state) then suspect that the reflex mirror isn't raising fully, a shutter problem would (more than likely) manifest itself as a sharp transition. I'm sorry that I cannot offer any advice on repair.