You asked
What is the nikon z 70 200mm f 2 8 vr s good for?
The Nikon Z 70-200mm f/2.8 VR S is a full-frame telephoto zoom with a constant f/2.8 aperture and image stabilisation. It suits tight headshots and strong background blur outdoors, where you can stand well back from your subject. The portraits guide explains why that distance flatters faces. It also works for picking out distant detail in landscapes, though you'll usually stop down there.
If you want less weight, the Nikon Z 70-200mm f/2.8 VR S II is about a quarter lighter. For a full-frame body, the Nikon Z6 II pairs well with it. On an APS-C body like the Nikon Z50 II, it frames like 105-300mm, which gives you more reach.
Written by Claude from this site's pages.