You asked
Is the nikon z 35mm f 1 4 sharp wide open?
I don't have sharpness test results for the Nikon Z 35mm f/1.4, so I can't tell you how crisp it is at f/1.4. What I can tell you is that it's a full frame prime with autofocus, and it fits the Z6, Z7, Z8, Z9 and most other full frame Nikon Z bodies. The lens page has the full list.
At f/1.4 the depth of field is very thin, which matters more than edge sharpness for most portraits. For two people at different distances, see aperture and background blur.
If you want a lens known for a soft, glowing look wide open, that's a deliberate choice. Our page on the Leica Summilux-M 35mm f/1.4 describes it that way. It's a different lens, so check its page before you decide.
Written by Claude from this site's pages.