See my Sigma DSLR lenses wishlist.
These examples shot at the Laws Railroad Museum in Bishop, CA.
The Sigma 40mm f/1.4 DG HSM Art is a DSLR lens more at home on the Nikon D850. However, the focus shift of the Sigma 40/1.4A along with focusing accuracy issues proved problematic on the Nikon D850. Accordingly I shot using the Nikon FTZ lens adapter on the Nikon Z7 which afford much more accurate focus as well as mostly mitigating the focus shift.
Include images up to full camera resolution through f/11.
The Sigma 40mm f/1.4 DG HSM Art is a lens whose performance places it squarely in Zeiss Otus territory. If the stunning clarity of these images (most at f/1.4) does not smack you with astonishment, I don’t know what will.
At about $1399, the Sigma 40mm f/1.4 DG HSM Art might well be the best value on the market today, bar none. Even in absolute terms, its performance in the 35 to 55mm range is rivalled only by the Zeiss Otus 55mm f/1.4 APO-Distagon, and I’m not yet clear on which is superior.
Below, depth of field is thin, but the startling clarity and color purity at f/1.4 is world class. This is not a 5mm longer version of the Sigma 35mm f/1.4 DG HSM Art; rather it is a world class cine-grade design that along with the Sigma 105mm f/1.4 DG HSM Art represents the state of the art lens design for the 35mm format.