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Author Message   Commando303 Tinkerer Username: Commando303 Post Number: 7 Registered: 10-2007 Rating: N/A Votes: 0 Posted on Monday, October 15, 2007 - 09:16 am:    I'm not sure what you mean by "back half" and "front half." Right now, the lens is in two major pieces: one is the "ring" with leatherette focusing strip and distance markings; the other is the piece with all the glass elements in it. When I bring them together to screw the second (lens-elements) piece into the first, there are multiple ways the two can go together. Unfortunately, every way I've been able to reach has led me to a situation wherein the lens cannot focus to infinity. I was wondering if anyone who's done this has any advice as to how to accomplish the feat. *The helical is slightly different with later-model Pancolars (still 2/50, not 1.8/50): it's a rather simpler procedure with them.