sanek@iqlabs.com wrote in message <6e6nnn$rv5$1@nnrp1.dejanews.com>...

>I bought AF 50mm f/1.4 non D recently. It was used but looked geat. I shot a
>film on it (Kodak Ektapress PJZ) using different distances and aperatures. The
>result from almost all of the pictures shown that resolution in the center of
>the frame was worse than at the edges. The difference in sharpness was uneven
>between frames, probably because of different F numbers used. This kind of
>behavior I experiencing for the first time. My previous 50mm f/1.4 was AI-S
>and it was a bit mildew inside, but never performed bad after f/4.
>One more difference: I used AI-S version on FM2 but AF version on F4.

It sounds like poor printing... Try checking the film with a magnifier.
A normal 50mm f1.4 Nikkor should look sharp over most of the frame at
f1.4. Contrast improves to excellent at f2, and edges/corners should
be good by around f2.8. Mis-focus by the body's AF (not uncommon...;-)
should not result in the observed effect, since the 50mm Nikkors are
fairly flat-field. It is possible the lens is defective, and examining
the negatives with a good 8-10X magnifier should tell you if that is
the case, or if the printer is at fault.

--
David Ruether
http://www.fcinet.com/ruether
ruether@fcinet.com