Rough schematic of Nikor Non A.I. 50 1.4
I recall from years ago an old timer explained that the different metals with a special thin lube was what gave the focus mechanism its silky smooth but resistive motion. I also recall being told not to compare too closely the action of new (circa 1980) and older Nikon lenses.
I would dismantle the bugger and have a look to see if the lubricant has dried or to see if the set screw has loosened a bit over time. Once upon a time, I had a small jar of special "Lens-lube," given to me by the old timer. I'll have a look for it. Who knows what I might find in the search.
BTW, once you remove the first retaining ring ( a rubber ring on a plastic jar is my tool of choice), the rest is gravy.
Let us know what you find.
Last edited by Thomas Wilson; 03-18-2010 at 08:01 PM. Click to view previous post history.