In article <50hjlq$a4o@ohnasn01.sinet.slb.com>, philip@hdss50 says...

>I was thinking of using my Nikkor 300 f/4 as a scope.
>With such nice optics I think it would do a great job.
>Do you know where I can find an eyepiece adaptor for this purpose and
>if the result is worth the try?

Yes it is, and Nikon used to offer a pretty good scope adaptor,
though I don't know where you would find one now. Results with
most lenses are good (good enough to see directly the differences
in optical quality between good and poor filters put on a 300mm
lens when looking through it using the 10X scope adaptor). Even
using shorter lenses (like the 135mm f2.8's) makes a good-quality,
compact, high power monocular. (I don't want to sell mine....;-)
Hope This Helps