I just came home from my first trip with the 8-16 and the Lee SW150. They didn't have the Fuji 8-16 adapter ring in stock so I had to improvise to get a good fit and stop light leaks. Foam, tape and a pair of fleece gloves did the trick. Hopefully the adapter ring arrives this week.
Waterfall Dettifoss in north Iceland.
X-T3 + 8-16/2.8 + Lee Big Stopper