On Sat, 27 Jul 2002 16:09:17 -0700, "Larry R Harrison Jr" wrote:

>I have seen an 80-200 f/3.5-4.0 lens for Nikon AI mount for sale on eBay.
>(I'm sure you guys get questinos like this ALL the time, right?) The
>following comments appeared in the description:
>
>This is a Sigma 80-200mm lens for Nikon manual focus cameras. It has been
>used very little and is in excellent cosmetic condition. The front and rear
>glass elements are clean and scratch-free. There is some dust specks inside
>the elements but this should not affect the picture quality.
>
>What are your opinions; how much (if any) owuld dust specks inside the
>elements affect quality? Also, any web sites which can give general advice
>along those lines?

Dust specks inside lenses rarely cause problems, unless
there are a LOT of them, they are very light colored,
and you shoot bright light sources with exposures that
cause *considerable* overexposure of the light sources.