This far distance scene reveals the total sharpness across the frame corner to corner, although at 105mm and f/1.4 depth of field matters even at this distance.
Included for perspective (and giggles) is the Sigma 105mm f/4 DG OS HSM Art at 105mm. This is a classic demonstration of zoom performance vs what a good prime lens can do.
Images up to 28 megapixels for apertures from f/1.4 - f/13. Very large crops of major areas are also included, also from f/1.4 - f/13.
The Nikon AF-S 105mm f/1.4E ED is clearly Nikon’s best-ever f/1.4 lens. Highly recommended.
Jeff S writes:
I tried 2 copies of the 24-105mm Sigma Art a couple of years ago and was not impressed. You're results are consistent with what I experienced. I have rented the Sigma 24-35mm f/2 DG HSM Art and was very impressed at f11-13 especially. It is a big lens and limited range for it's size weight, but performs well at all zones when stopped down as mentioned.
However, more impressive to me is the new Nikon AF-S 24-70mm f/2.8G ED VR. It's expensive, but 2x I've rented it for trips and been very impressed. It is very sharp, and seems to have excellent depth of focus even at 4 for 5.6. Your initial tests surprised me by showing its quality in the Bristle Cone Pines shots in the White Mountains, which is why I decided to give it a try. I really love this lens, and I can't believe I'm saying that about a zoom. I love the VR addition which allows me to be tripod free as needed and explore shots quickly while maintaining great sharpness on most scenes.
DIGLLOYD: surely the Sigma 24-105mm f/4 DG OS HSM Art is one of the most disappointing lenses in the Sigma Art lineup.