EXCERPT page containing first few paragraphs. 2021-12-08 02:45:12
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With the debut of the Nikon Z system and the Nikon Z7 with its sensor needing 116 lp/mm, Nikon continues to promulgate the same inappropriate 10 and 30 lp/mm MTF charts it has for years, and for only one aperture (wide open) and without specifying spectral balance. Net/net the MTF chart offers limited insight versus charts from Zeiss with white light made measured from actual lenses. Still, the chart is suggestive of performance at 40 lp/mm and beyond.
The computed-not-measured theoretical MTF chart for the Nikon NIKKOR Z 14-30mm f/4 S show extremely high overall contrast at f/4 (red lines) with extremely high micro contrast in the center dropping off steadily to very good levels into the corners at the wide end. The telephoto end drops off strongly into the edges and corners and is going to need some stopping down. Neither chart is very believable..
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