EXCERPT page containing first few paragraphs. 2017-01-22 10:15:34
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This page compares the M240 + 28mm f/2.8 Elmarit-M ASPH against the Sigma DP1 Merrill using the same image as the two prior pages; this were native resolution and matched resolution, this page is also matched resolution but with the M240 downsampled to match the Sigma DP1 Merrill.
See the testing comments on the M240 + 28mm vs Sigma DP1 Merrill Native Resolution page.
Downsampling reduces digital artifacts and generally increases per-pixel quality in every way. It is another way of comparing cameras with two different resolutions. In particular, a higher resolution camera when downsampled to a lower resolution and given appropriate sharpening should outperform on a per-pixel basis, all other factors being equal.
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Since 2009, Diglloyd Guide to Leica is the authoritative review and reference for Leica M lenses: Leica M, Zeiss ZM, Voigtlander, as well as Leica M digital bodies. Leica S is also included.
It includes hundreds of pages of exclusive coverage and high resolution Retina-grade examples covering Leica M-System lenses and digital bodies with in-depth performance comparisons and analysis.