On Sun, 23 Jun 2002 15:46:09 -0400, "Paul C. Ross Ph.D." wrote:

>I have a Canon F1 and have looked at several lens for it. I am interested in
>what experiences people have had with the Vivitar Series 1 24 to 70 Zoom and
>the older Series 1 90 mm macro 2.5.
>
>The lenses are for different purposes, but I am interested in overall
>picture quality, sharpness, and contrast.

You can find the 90mm Series I compared with
Nikkors at www.David-Ruether-Photography.com/slemn.html.
It was an excellent macro lens, but for "normal"
use, it was a tad lower in contrast than better
lenses, and quite sensitive to side-light flaring.
I never used the 24-70 S. I...