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Author Message   Paul_c Tinkerer Username: Paul_c Post Number: 7 Registered: 02-2010 Rating: N/A Votes: 0 Posted on Tuesday, March 23, 2010 - 05:33 am:    Thanks David ! I did see that ring deep down with 4 slots and gave it a try but was afraid to destroy something. I first used a aluminium tube and a file too make de tube fit the slots but aluminium is too soft so that did not work. Finely I used 2 screwdrivers kept in place with 2 plates and a spanner.I had too use excessive force too free the retaining ring. Initially there was no need too remove the lens but I build a LRT (lens removal tool) using a syringe with the top off and a piece mastic (Bostik) Next is too free the shutterblades(stuck open) and the diaphragm with one blade moving around arbitrary, David, thank You again