EXCERPT page containing first few paragraphs. 2023-03-21 16:24:18
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Vignetting: 50mm f/2.5 Summarit-M
Vignetting is low, and the Leica M9 lens correction should all but eliminate it.
Even wide open at f/2.5, the amount of vignetting is likely to go unnoticed, especially with the M9 lens correction; at only a bit more than 1 stop, this is not very visible, even without correction.
Stopping down to f/4 reduces vignetting to a non-consideration, and there is little change to f/5.6.
See also the Color Shading page.
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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.
Special emphasis is placed on Leica M lenses and certain Zeiss ZM lenses.
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