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Author Message   Eskimogus Tinkerer Username: Eskimogus Post Number: 49 Registered: 12-2009 Rating: N/A Votes: 0 Posted on Thursday, June 07, 2012 - 03:13 pm:    Recently acquired a Leitz Xenon 50mm f/1.5 Leitz's first attempt at a super fast lens Anyone know how to open one up? It's quite dirty inside on the internal elements, but do not know how to open her up. I can take the back mount off by the 3 screws on the base around the mount, and there are 7 more screws on the body. One large near the focus knob (But not deep, just large head) Another large one and 2 small ones on the front rind (Loosens aperture ring from apertures inside) And 3 more screws on the center ring on the lens. I need to reach the center elements to clean. All i need to do... I guess if you have an newer Leitz Summarit 50mm f/1.5 it should be similar. It's almost the same except for a few minor changes. Comment back or email me at [email protected]