You asked
Is the fujifilm xf 16mm f 1 4 r wr sharp wide open?
I don't have sharpness test results for the Fujifilm XF 16mm f/1.4 R WR, so I can't say how sharp it is wide open. What I can tell you is that it's a prime for APS-C Fujifilm X cameras, with autofocus and no image stabilisation. On APS-C it frames like a 24mm on full frame, and f/1.4 gives about the depth of field of f/2.1 there.
If edge-to-edge sharpness at f/1.4 matters to you, look at reviews that test it directly. The lens page has the full spec list and the cameras it fits. For what the f-number means for light and background blur, see Lenses.
Written by Claude from this site's pages.