In article <3228F03B.649E@earthlink.net>, seangolden@earthlink.net says...

>Has anything like this been done for non-Nikon lenses? Particularly for
>lenses which work on a Nikon but are made by another manufacturer
>(Sigma, etc)

Umm, yes.... I did include non-Nikkors in "SLE(MN)" that were at least
decent, though I have not tried many of the recent crop of non-Nikkors
(the percentage of good to bad non-Nikkors was so low that I stopped
bothering with them [used Nikkors are a better buy, and hold their value better on resale, so, in general, why bother?]). I did not list the many forgettable non-Nikkor lenses that I tried and did not like.
Hope This Helps