It has been a while since I had shot the Zeiss Batis 18mm f/2.8 much, but I did so with a variety of ad-hoc images while hiking with my daughter recently. Autofocus is essential for grab shots while hiking steep or boulder-filled terrain.
That said, I got out the tripod for this distant landscape scene , which evaluates sharpness across the field as well as secondary color correction.
Includes images from f/2.8 through f/11 at up to full camera resolution.
The Zeiss Batis 18mm f/2.8 is a strong performer, but we seem to be entering a golden age of new optical designs, and I for one am eager to see how much better it can get, what with the impressive Hasselblad XCD 21m f/4, a lens that covers medium format. What stellar designs might emerge from Canon and Nikon now that the DSLR mirror box has been abandoned, and from Panasonic full frame going forward?