You asked
Is the fujifilm xf 16 80mm f 4 r ois wr good for portraits?
It's a useful all-round zoom, but I wouldn't pick it as a portrait lens. On APS-C it frames like 24-120mm on full frame, so the long end reaches flattering headshot range, and the stabilisation helps with handheld shooting indoors. At f/4, though, you get only modest background blur, and that's a big part of what makes a portrait stand out.
For portraits, the Portraits guide explains why longer and faster lenses work better: standing further from your subject keeps faces in proportion. On APS-C, a 56mm f/1.2 to f/1.4 plays the role an 85mm does on full frame, and a 50mm f/1.8 behaves like a classic 75-80mm portrait lens.
Keep the 16-80 for travel, street, and anywhere you need the wide end. For people, the Portraits page has the full case.
Written by Claude from this site's pages.