Ok - so I've got one of these lenses - yet to try it yet.
Just acquired one, fairly cheaply.
But it has an issue.
Although it's free from fungus, and there doesn't appear to be any scratches on the glass anywhere, the focus ring does appear to stick quite a bit at a couple points in the rings travel.
On closer inspection, it looks like it may have taken a bash at some point, so that the barrell has a very slight flattened are on the outside.
I should have taken a photo to highlight it.
Anyway, I think this slightly deformed area (and possibly also a bit of flattening on the focussing ring barrell), is causing this slightly jarring focus action.
So, I'd like to dismantle the lens slightly, to try and sort out these flattened areas.
Problem is, I've found no sources online so far to illustrator how to do this.
I have managed to remove the name plate round the lens on the front - but that's as far as I've gone.
I really don't want to go into this unprepared as I've read it's a very decent lens, so I don't want to render it useless because I've gone into this too hastilly.
So, any help would be great!!!!
I think the main issue I have is removing the focussing ring - if I can get this off, it should give me a bit of room to try and add a curve again to the areas taken a bash, and thus hopefully making it easier to turn the focussing ring...
Last edited by LensMagnet; 08-05-2013 at 02:54 PM.
Reason: Clarification