You asked
Is the nikon z 28 75mm f 2 8 worth it?
It's a solid pick if you shoot full frame and want one zoom that covers portraits, events, and everyday shots. The f/2.8 aperture stays bright across the range, and it's autofocus, but it isn't stabilised, so you'll rely on the camera body or faster shutter speeds.
If you're on a full-frame body, I'd pair it with the Nikon Z6 II for a balanced all-rounder, or the Nikon Z8 if you shoot fast action a lot.
On APS-C, it frames like 42-112mm and its f/2.8 behaves more like f/4.2 for depth of field. That's still usable, and the Nikon Z50 II is a sensible, lighter partner. Before you commit, check whether full frame is worth it for how you shoot.
Written by Claude from this site's pages.