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Author Message   Brcamera Tinkerer Username: Brcamera Post Number: 42 Registered: 08-2010 Rating: N/A Votes: 0 Posted on Friday, October 01, 2010 - 06:02 pm:    My experience with the Contaflex I front lens element is that once removed, it can sometimes be difficult to replace unless the lubricant is cleaned from all the threads. After a good cleaning and some light lubrication, it should screw right in...