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Author Message   John_shriver Tinkerer Username: John_shriver Post Number: 81 Registered: 12-2006 Rating: N/A Votes: 0 Posted on Friday, June 15, 2012 - 08:53 pm:    Well, the Topcon mirror can be somewhat on the "twing" side, sound-wise. But it is a lot worse when the mirror damper foam is kaput. The mirror should stop before it hits the plate of metal in front of the focusing screen.