This series from f/2.8 through f/11 evaluates the Sigma 14-24mm f/2.8 DG DN Art at 24mm for sharpness at close range as well as focus shift, bokeh and secondary color. Shot in pixel shift mode for absolute highest sharpness. As well, lens skew is demonstrated.
Includes images up to full camera resolution from f/2.8 through f/11.
I am excited about the about $1399 Sigma 14-24mm F/2.8 DG DN, but this sample clearly has a lens skew issue that shows up at both the wide end and the long end. I won’t be doing any more testing with it unless the 2nd sample is worse (2nd sample shows up on 5 days from now).
Optical designs can look great on the computer but real lenses have to be built, and production tolerances can make high performance designs that deliver the as-designed performance difficult to produce. Thus fantasy MTF charts often conflict with reality in a real lens. I plan on buying the about $1399 Sigma 14-24mm f/2.8 DG DN Art, and I will try a 3rd sample if necessary to get one that is top-grade as-built, or a 4th or a 5th—hopefully Sigma quality control is not that bad.