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Author Message   Tom_cheshire Tinkerer Username: Tom_cheshire Post Number: 32 Registered: 04-2009 Rating: N/A Votes: 0 Posted on Friday, May 29, 2009 - 05:00 pm:    Tighten the retaining ring that holds it in there. If that ring is frozen or jammed then sit the lens on its butt pointing straight up and put a dab of glue on three edge corners to keep the element locked in place. Good glues: contact ement or instant. A little dab will.