I regularly use the Sigma 18 35 F 1.8 Art on my Fuji X-E1 with a Rayqual Nikon G to Fuji XF adapter.
The adapter has a tripod mount, which helps a lot for landscape shot and to reduce flange mount stress from heavy lenses.
The results are stunning, performance is better than fuji primes in the same range and f-stop. I tested it against my XF 23mm 1.4 and 35mm 1.4 and in both cases the Sigma is sharper and has better control of chromatic aberrations and spherochromatism.
Performance on a Fuji X-A2 body is even better wide open. I suspect it may be due to a different sensor glass depth?
Simone Pietro Saragosa got a reaction from Curiojo in Sigma 18-35 f1.8