17mm / f4 Performance

Performance at 17mm: f4 (Centre Frame)

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Contax N 17-35mm at 17mm/f4 Nikon 17-35mm AFS at 17mm/f4
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Performance at 17mm: f4 (10mm off-centre, right side)

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Contax N 17-35mm at 17mm/f4 Nikon 17-35mm AFS at 17mm/f4
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Performance at 17mm: f4 (Upper left corner)

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Contax N 17-35mm at 17mm/f4 Nikon 17-35mm AFS at 17mm/f4
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Note that the Contax’ fairly pronounced vignetting at f2.8 is greatly reduced, but not quite absent, at f4. The gulf between their corner performance remains astonishing. It’s interesting to compare these results with those of the Canon 16-35L v Nikon 17-35mm f2.8 test, as well as the Contax 17-35 v Canon 16-35mm test. The Canon’s corners are pitched between these two in the f2.8–f4 range. We also see the same discrepancy between the lenses’ resolution which varies significantly across the frame – and not in ways one might expect.