EXCERPT page containing first few paragraphs. 2022-08-18 16:22:49
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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.
Overall lens contrast for coarse structures is exceedingly high wide open. Contrast of medium structures is exceedingly high (and not very believable!) in the central 1/2 or so of the frame declining somewhat in the outer zones together with quite substantial astigmatism, which might be lateral chromatic aberration (which gets corrected as a requirement as per the image EXIF).
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