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Author Message   Wayne Rating: N/A Votes: 0 Posted on Thursday, December 01, 2005 - 05:11 am:    Thanks Wayne for the reply. I suspect you're right in that my lens is more likely to have a synthetic cement. I hadn't thought of that. Who knows how it would react to heat? And Rick, I think I'll take a hint from your suggestion and try reassembling the lens and give it a test to see just how it does perform. The element group is an inner element in a Vivitar Series 1 28-90mm. Wayne