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Author Message   Steve T. Rating: N/A Votes: 0 Posted on Wednesday, April 19, 2006 - 01:02 pm:    Thanks to you both for the information. OK, Winfried, if I understand your instructions, I close the aperture and look at the rear element with a bright lamp shining on it. I saw two side-by-side reflections of the lamp on the rear element. One very bright and right-side up, the other a little more faint and upside-down. Does that mean Tessar?