Sigma DP2 Merrill Sharpness: Impressive Sharpness and Realized Depth of Field
If this aperture series with generous retina grade crops doesn’t knock your socks off then I don’t know what will.
In Guide to Mirrorless in my review of the Sigma DP1/DP2/DP3 Merrill cameras is a Sigma DP2 Merrill aperture series from f/2.8 - f/16 (Pellegrino bottles with rulers).
Actual pixels, wide open at f/2.8.