Sigma SD1 Merrill: 18-35mm f/1.8 @ 35mm: Red Barn Aperture Series
This full aperture series comparison includes HD and UltraHD images from f/1.8 through f/16 along with analysis of performance and large crops. In DAP:
Sigma SD1 Merrill + Sigma 35 Sigma 18-35mm f/1.8 @ 35mm (Red Barn)
This series will be of considerable interest to anyone shooting the Sigma 18-35mm f/1.8 zoom, because it clearly demonstrates a behavior that one must understand to get the best results (APS-C sensor coverage, available for Sigma, Nikon, Canon, Sony Alpha, Pentax).