Yes Bernard you are correct the 17-55mm f2.8 ED Digital Lens was purchased new to originally shoot on a Fuji S3 , it is extremely surprising exceptionally sharp & does produce amazing images on the D3X Camera, with the exception of the wide angle settings 24mm to 17mm. When I purchased the Nikkor 17-55mm from Dodds in Cleveland I ran extremely exact tests in their showroom comparing it with the Sigma & Tokina Lenses this same focal length all at f8 sweet spot. This Nikkor was night & day apparent it clearly outperformed all the other lenses.
William H. Webb