rwbaron
Forum Pro
From the DPR test of the new Nikkor 16~35Since when did Canon start making lenses for Nikon? Nice try at a diversion. Canon has always had QA problems with their lenses and it is widely accepted that sample variation amongst L glass is wider than the Grand Canyon. Like I said, nobody has yet posted indisputable proof that this so called "decentering" even exists on Nikon manufactured glass. Someone in this thread pointed out problems with Sigma, no surprise here. Now run off and find me a "decentered" Nikkor...."Abscence of evidence is not evidence of abscence." - Dr. Carl SaganI've never seen proof posted on the internet of a single legitimate and verifiable case of "decentering".We're looking forward to seeing the supporting test data. If you don't have it for every lens ever made, we'll entertain statistical arguments based on a sampling of, say, 5%.There's no such thing as "bad copies" of a lens,
You ought to log out of dpreview more often.
http://www.slrgear.com/articles/variation_canon50f14/canon50f14.htm
"Our studio tests show that our review sample of the 16-35mm suffers from softness when shot wide open at 35mm (but not at other focal lengths), and the samples below illustrate how this looks in practice. At first sight it would be easy to dismiss this as user error - perhaps a touch of shake, or slight misfocus - but the asymmetry of the effect, with the top left corner clearly worse than the rest of the frame, betrays it as a lens issue."
Photozone has references to decentered Nikkors too.
How many do you want?
Bob
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