> - I have one of lenses. I have been told that this is a junk lens. but
> repeated test have I have done. by taking pictures of different scenes
> etc. suggest that this is a sharp lens. have I just been lucky ?
While you may BE lucky, there is a good bit more to lens quality than
"sharp" (various aberrations, distortions, evenness of illumination, etc.).
But if you're evaluating "sharp," the real question is, how many lines/mm
does it resolve, both in the center and at the edge, compared with the best
Nikkor 80-200 ...