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Author Message   Aaron Rating: N/A Votes: 0 Posted on Friday, February 27, 2004 - 05:31 am:    Help! I have removed the silver screw on the silver retaining ring of my 50/1.4 FL lens, hoping to remove the rear element to clean. However the silver ring cannot be removed. Now I cannot put the screw back, for there is something which springs into the path of the screw and blocks it. How can I put it back again? Thanks