You asked
Is the nikon z 17 28mm f 2 8 good for landscape?
Yes, it's a sound choice for landscapes on full frame. At 17-28mm it's wide enough for big skies and strong foregrounds, which is the main job of a landscape wide zoom. On a Nikon Z APS-C body it frames like 26-42mm, so it's much less wide there. APS-C landscape shooters should look for a wider zoom.
The f/2.8 is more lens than landscape work needs. You'll usually shoot between f/8 and f/11 anyway, so an f/4 wide zoom will do the same job for less weight and money. It's also not stabilised, but that matters little when you're on a tripod.
It fits full frame bodies like the Nikon Z7 II and the Nikon Z6 III. For more on wide zooms for scenery, see the landscape guide.
Written by Claude from this site's pages.