On Mon, 30 Nov 1998 17:21:29 -0000, "Spencer Childs" wrote:

>Hi, I have just got and tested the Nikkor 20mm f2.8 and, for the price, I'm
>finding it a bit disappointing. Could it be I have a bad one?
>
>The corners are really bad until about f8 and then they are only acceptable.
>The overall image quality is OK but not wonderful. It seems that my old 24
>f2.8 AI lens was a whole lot better with even coverage and sharp across the
>frame. Its a very expensive lens if it has to be a compromise.

I would exchange it immediately! The 20mm f2.8 Nikkor checks out as
even a bit better than the excellent 24mm f2.8 Nikkor (several samples
of each checked). The 20mm f2.8 Nikkor is a great lens, and should
show good far-corner sharpness by f5.6, excellent by f8... BTW you
may find my Nikkor evaluation list useful, on my web page, under
"I babble"...;-)