EXCERPT page containing first few paragraphs. 2023-10-02 11:50:21
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Like most brands, Fujifilm does a lame job at publishing MTF charts—wide open only, and no description of the spectral balance for the claimed performance, and it looks to be diffraction-ignoring computed fantasy MTF to boot—not measured with a real lens. The fact that Fujifilm does not publish anything but wide open performance is disappointing, and even that is not explicitly stated.
Overall lens contrast at f2.8 for coarse and medium structures is outstanding over the entire frame. Fine structures (40 lp/mm) are good, but there is a significant rolloff to the corners (probably field curvature), and a lot of mid-zone astigmatism and likely field curvature as well.
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