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Author Message   Meade Tinkerer Username: Meade Post Number: 3 Registered: 02-2012 Rating: N/A Votes: 0 Posted on Friday, March 09, 2012 - 04:50 pm:    When the automatic diaphragm mechanism is tripped the pressure pin on the back of my Meyer Oreston 1.8/50 lens sticks (Exakta RTL 1000). It comes back out very slowly. Is this usually some old grease around the pin and can I get to it easily to clean it? Thanks.