EXCERPT page containing first few paragraphs. 2020-07-07 17:25:07
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MTF (calculated* not measured) is shown below at f/1.9 and f/5.6.
Performance at f/1.9 is remarkably strong for what it is, but stopping down to f/5.6 delivers outstanding results across the field with apparently only very mild field curvature in the mid zones and strictly controlled astigmatism.
While Hasselblad does not provide MTF for f/2.8 and f/4, it is likely that f/2.8 bumps things up substantially and that would make the 80/1.9 a terrific lens for many purposes.
Although performance falls off to the outer zones at f/1.9, it is still very good, and results with centered subjects should be very pleasing.
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