You asked
Is the viltrox af 90mm f 2 2 evo good for portraits?
Yes, I think it's a good portrait lens, especially if you already shoot APS-C. On a Sony E, Fujifilm X or Nikon Z body it frames like a 135mm on full frame, a classic portrait length, and f/2.2 gives a soft background with about the depth of field of f/3.3. It's autofocus, but it isn't stabilised, so keep your shutter speed up.
If you're starting out, a body like the Fujifilm X-T5 or Sony a6700 pairs well with it. Remember that light beats gear: a window and a little distance from your subject will do more than any lens. For more on portrait focal lengths, see the portraits guide.
Written by Claude from this site's pages.