You asked
What is the nikon z 600mm f 6 3 vr s good for?
The Nikon Z 600mm f/6.3 VR S is a stabilised prime for full-frame Nikon Z bodies, and it's built for reach. On full frame it frames as 600mm, and on APS-C it gives the view of about 900mm. That makes it a bird and distant-wildlife lens. As the wildlife and sport guide says, birds are small and far away, so 600mm full-frame equivalent and beyond is where you want to be.
It works on any of the full-frame Z bodies listed on its page, such as the Nikon Z9 or the Nikon Z8. If you'd like a zoom instead, the Nikon Z 180-600mm f/5.6-6.3 VR covers a similar long-reach range with more flexibility. Long lenses also hold their value well, so check the buying used advice before paying full price.
Written by Claude from this site's pages.