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Author Message   Fidji Tinkerer Username: Fidji Post Number: 51 Registered: 12-2011 Rating: N/A Votes: 0 Posted on Wednesday, July 03, 2013 - 01:21 pm:    You unscrew the black nameplate on the front of the lens. I use a 2" length of rubber drain pipe from a washing machine, but you could use a rubber glove for grip to unscrew it [anticlockwise]