In article <4nvbf4$4g@client2.news.psi.net>, joel@exc.com says...

>Do any of the commonly-cited reviews use more than one test lens?
>More than 5? Are there are reviews about lens variability?

I touch on it in "SLE(MN)", since I have checked multiple samples of
several Nikkors. Sites where "SLE(MN)" can be found are at:

-- Jan-jaap Aue: (nice text format)
http://www.phys.rug.nl/mk/people/aue/nikon/david.html
-- Quang-Tuan Luong: (nice text format)
http://robotics.eecs.berkeley.edu/~qtluong/photography/35mm/
nikon-neuman.html
-- Niklas Nikitin: (nice table format)
http://www.cs.hks.se/~nicke/private/photo/lenstest/david.html

Hope This Helps