Dennis Swanson wrote in article ...
> Who would have guessed that on 1 Oct 1997 at 20:27:24 GMT
> Neuman - Ruether (d_ruether@hotmail.com) would say:

> ~ Um, I was probably "that somebody", and the reason I pointed out that
> ~ results are unpredictable is for just this reason: some lenses do
> ~ perform
> ~ badly on tubes... (I can name several otherwise excellent lenses that
> ~ are poor on tubes, if you are interested...;-).

> I'm extremely interested, esp. if any are AF Nikkors, since I just
> bought a wonderful PN-11.

The Nikkor MF 85mm f2, 105mm f2.5, 135mm f2.8/f2 and the AF
80-200mm f2.8 (when near the 200mm end of its range) come to mind...
Also, the macro lenses that have CRC (most these days...) may not
be optimum at some focus settings when on tubes. (Smaller stops can
cure a lot of ills, though...;-)
Hope This Helps
David Ruether - http://www.fcinet.com/ruether