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Author Message   Rick_oleson Tinkerer Username: Rick_oleson Post Number: 467 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Friday, December 28, 2007 - 05:58 pm:    All that means is that there's no oil on the blades where you can see it. It can still be there, both on the blades around the outer pivot area where you can't see it, and on the operating ring and linkage. When I've opened these (and other) lenses up, there usually is oil all over the place inside. This sketch is hard to read at 450x450 pixels; email me for a higher resolution copy.