The about $1399 Sigma 14-24mm F/2.8 DG DN Art is here. It might be the finest 14-24mm zoom ever produced, but it has some limitations, as this series shows.
This series from f/2.8 through f/9 evaluates the Sigma 14-24mm f/2.8 DG DN Art for sharpness across the field as well as bokeh.
Includes images up to full camera resolution from f/2.8 through f/9.
I planted this tree from a nut back around 1992—nuts beget nuts (?)—they are not popular but they are one of the most shapely trees in California when mature (this one needs another 50 years). California Buckeye Aesculus californica grows slowly, is one of the first trees to leaf out each year (February) and looks dead by June, whereupon it grows a crop of attractive nuts, though this year this tree has not produced any.