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Author Message   Aphototaker Tinkerer Username: Aphototaker Post Number: 181 Registered: 12-2009 Rating: N/A Votes: 0 Posted on Thursday, April 01, 2010 - 04:26 pm:    Yes, I will try with a better screen next time. I do not have a focusing screen at hand for this purpose. I will try ground glass and see if that helps with accuracy. I am using a 50mm f/1.8 lens as a loupe. I might try with a longer one next time.