EXCERPT page containing first few paragraphs. 2018-06-17 23:02:58
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Past experience with the Leica M Typ 240 (Bayer matrix color sensor) shows that the first hints of diffraction appear at f/8, with 9.5 still holding good quality but showing some dulling. Obvious dulling (loss of micro contrast) is occurring by ƒ/11 and substantial losses are seen at f/16.
The 24-megapixel Leica M Typ 246 can be expected to suffer at least as much from diffraction, and probably a bit more, perhaps 1/2 stop earlier, since its sensor needs no demosaicing and thus has inherently higher spatial resolution.
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Diglloyd Guide to LEICA contains in-depth coverage of Leica M system cameras and lenses, with additional coverage of Leica M Monochrom, Leica Q, Leica SL.
Special emphasis is placed on Leica M lenses and certain Zeiss ZM lenses.
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