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According to lenstip, the 40mm (lateral) CA is half that on FF than it is on APS-C. Nonsensical, it seems.
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I was inquiring: with such massive distortions, after correction, some cropping is necessary, it's always a 24mm lens but does it keep the same angle coverage ??
Just a note, for such a lens it's distortions correction that will remove corners vignetting as it is cropped out rather than vignetting correction.