This series shows the quality from f/2.8 through f/11.
The quality problem with this sample at f/2.8 is pronounced . Please see the Skew page; this sample apparently has built-in tilt and swing! For a $5800 lens, this is very disappointing.
Sometimes the lens makes a sharp image at f/2.8. But every controlled trial I performed, it could not! It didn’t matter whether I used VR or not, or Live View to focus, or autofocus. The strong skew throws all bets off, yield peculiar results, apparently also confusing the autofocus system, and me too, when I used Live View, where is was difficult to focus.
When I used the Nikon 2X teleconverter on this sample, the results were truly abysmal— garbage.
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