I got this lens with a bunch of other fd lenses in an as-is state. This lens appears new except the aperture blades won't move. I've tried on various bodies, T-90, F-1, EF, and there is no movement when stopping down or shooting manual or automatic....The aperture setting ring will move, and it will also move to the A setting for T-90, etc. I've compared the mount side of the lens with other lenses that do work, and they all appear the "same" in regards to position of aperture clicker thingey, etc. Anyone ever taken one of these apart, or have any ideas what the problem could be? As I said the lens appears new, there is no junk visible in the lens at all. I have the usual small screwdriver set and a spanner wrench i use for LF lenses. I've searched here and photo.net, and net, couldnt find anything. Found plenty of service manuals for free for FD bodies, but no free ones for lenses. BTW, I don't care if i destroy the lens, I've got plenty of others, but it would be nice if it did work.