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Author Message   Rick_oleson Tinkerer Username: Rick_oleson Post Number: 796 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Friday, February 13, 2009 - 09:31 pm:    It unscrews ..... but it is VERY tight, tighter than any other leaf-shutter lens I have encountered. This is how I get them loose. Once you get it started, it screws right off.