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Author Message   Bruce_robbins Tinkerer Username: Bruce_robbins Post Number: 26 Registered: 06-2008 Rating: N/A Votes: 0 Posted on Friday, August 30, 2013 - 04:23 am:    Fidji, I'm scared to remove the aperture ring for the very reason you stated! The dark metal rangefinder part surrounding the focus helical doesn't want to move. I've tried turning it using a moderate amount of force - didn't want to apply too much pressure. There seems to be nothing holding it on.