In article <5fj490$9f6@hsun27.chevron.com>, patl@chevron.com says...

>I have just bought two lenses thru mail order from Adorama.
>80-200/2.8 (with tripod collar):
>I mounted this lens on the N90s. When I zoomed at 200mm (so that the
>image is larger), the auto focus seemed to be slightly off. After the
>camera has focused on the subject (with the AF), I looked at the view
>finder and the subject was slightly off focus. I needed to rotate the
>focus ring by a little bit (maybe 1 to 2 millimeters) to make the
>subject in focus. Did I do anything wrong or the lens may have some
>problem?

The problem would more likely be in the body than the lens, which just
gets focused to where the body says it should be... Were you placing the
AF markers over a fairly flat subject part? (BTW, it has been my opinion
that AF doesn't work very well ['till the F5, anyway...], and about half
the time a bit of MF touch-up is in order, so why bother with AF? ['till
the F5, anyway...;-].)

>35-70/2.8
>I mounted this lens on the N90s too. I set the zoom at 70mm. I was
>surprised to see that there is noticeable distortion even at 70mm. The
>distortion happened mainly off center the viewfinder. When I pend the
>camera, the distortion was even worse. Does anyone have the same lens and
>do you have the same distortion?

It is hard to know what it is you mean by "distortion". If you mean "convergence of parallel lines when the camera is tilted", that is a
normal characteristic of rectangular perspective - and it appears to
diminish as the field of view diminishes, but is still quite evident
at the (relatively short) FL of 70mm... If you mean "curvature of
straight subject lines in the image", that is common in zoom lenses
(pincushion towards the long end, barrel towards the short), and also
in most camera viewfinders (pincushion-type) - both pincushion distortions
add in the finder, making it look worse than it will be on film.
Hope This Helps