Sigma 28mm f/1.4 DG HSM Aperture Series: Road Grader, Alabama Hills (Nikon D850)
See my Sigma SLR lenses wishlist at B&H Photo.
This close-medium range series evaluates lens performance from f/1.4 through f/13, including sharpness, color correction, focus shift, bokeh.
Sigma 28mm f/1.4 DG HSM Aperture Series: Road Grader (Nikon D850)
Includes images up to full camera resolution from f/1.4 through f/13.