In article <4nr49q$6sl@decius.ultra.net>, wa1uar@eecorp.com says...
>In article <4nij3q$e9g@Mercury.mcs.com>, ramanand@MCS.COM says...
>>I finally got down to cleaning my Nikkor 20/2.8 AF lens. Took apart
>>the aperture control ring and the rear eye piece that connects to
>>the lens barrel. I even removed the retainers for the geared ring
>>that moves the AF mechanism. But then I hit a brick wall.

> Without an optical alignment bench, you haven't got a prayer at
>re-assembling it properly!

Hmmm, I have partially disassembled a few MF Nikkors (you know,
those, uh, METAL-barrel lenses, with real machined parts in them
that fit, and are designed to come apart and go back together
properly), and reassembled them succesfully. Elements fit,
and are centered, if placed in the right order and orientation
when the lens is put back together. The trouble comes when one
thinks one knows how to disassemble a Nikkor based on the experience
with other Nikkors - while superficially the construction of MF
Nikkors seems consistent, in practice they are put together several different ways, and one often runs up against the original poster's
brick wall (now, if someone would just tell me how to get to the
diaphragm of a 135mm f2.8 Nikkor that has oil on it.......[or to
the helical of a 35mm f1.4 Nikkor that needs relubrication.....,
{or a cure for a penchant for writing run-on sentences.....;-}]).
Hope This Helps