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Author Message   Djamorpheus Tinkerer Username: Djamorpheus Post Number: 6 Registered: 10-2009 Rating: N/A Votes: 0 Posted on Sunday, February 28, 2010 - 11:50 am:    Well, there could be a couple of reasons for this, or a combination of them. Could be a misalligned focusing screen in the viewfinder. The mirror could be misalligned as well. Could be the helical threads on the lens, try putting the lens on another m42 body if you could. Or you could get another cheap lens and see if it focuses correctly.