Sigma 40mm f/1.4 DG HSM Art Aperture Series: Painted Rock (Nikon D850)
See my Sigma DG HSM Art wishlist.
This medium range series evaluates lens performance from f/1.4 through f/11 paying special attention to focus shift, which is extremely troublesome in this series, to the tune of 3 stops.
Sigma 40mm f/1.4 DG HSM Art Aperture Series: Painted Rock
Include images up to full camera resolution.
I have mixed feelings about the Sigma 40mm f/1.4 DG HSM Art; it is capable of outstanding results and yet the focus shift makes it a chore to work with.