See my Sigma SLR lenses wishlist at B&H Photo.
This far distance series evaluates lens performance from f/1.4 through f/5.6 across the frame, giving an excellent look at just how good the Sigma 28mm f/1.4 DG HSM Art is.
Uniform sharpness is very challenging for a lens for far distance scenes like this, so that precise focus is critical. This series was focused perfectly so as to extract maximum performance across the field so this series represents an optimal performance with the Sigma 28mm f/1.4 DG HSM Art.
Includes images up to full camera resolution from f/1.4 through f/5.6.