You asked
Is the nikon af s 85mm f 1 8g good for portraits?
Yes, the Nikon AF-S 85mm f/1.8G is a good pick for portraits. It's the classic full-frame portrait focal length: flattering perspective, soft backgrounds and a comfortable working distance. On full frame it frames at 85mm as marked, and on APS-C it behaves like roughly 128mm, which is a bit tight for most portraits but still workable outdoors.
It fits a long list of Nikon F bodies, including the D750, D850, D780 and D610 on full frame, and the D7500, D500 and D3500 among the APS-C models. The one caveat is that it isn't stabilised, so keep your shutter speed up.
If you want a wider view for people in their surroundings, the Portraits guide covers the 50mm f/1.8 and 35mm options too. For a first fast prime, see Lenses.
Written by Claude from this site's pages.