You asked
Best wide angle lens for the fujifilm gfx 50s ii?
For wide angle on the Fujifilm GFX 50S II, I'd start with the Fujifilm GF 20-35mm f/4 R WR. It covers about 16-28mm full-frame equivalent, which is enough for most landscapes, streets and interiors, and it's the one I'd buy if I could only have one.
If you prefer a prime, the Fujifilm GF 23mm f/4 R LM WR gives a classic 18mm-equivalent view in a simple package.
For the widest view on the list, the Laowa 17mm f/4 Zero-D GFX is about 13mm full-frame equivalent. It's a specialist choice for dramatic landscapes and tight interiors. If you shoot buildings and want to correct converging verticals, the TTArtisan Tilt-Shift 17mm f/4 ASPH does the same job at the same focal length.
Written by Claude from this site's pages.