You asked
Nikon z 24 120mm f 4 s vs nikon z 28 135mm f 4 pz?
These two are close cousins. Both are Nikon Z zooms for full frame with a maximum aperture of f/4, autofocus, and no stabilisation. The difference is the range and the intended use.
The Nikon Z 24-120mm f/4 S starts wider, at 24mm, so it's the better everyday pick for travel, landscapes and general stills. I'd call it the best all-round zoom on Nikon full frame.
The Nikon Z 28-135mm f/4 PZ reaches a bit further, to 135mm, and has a power zoom made for video. If smooth zooming while filming matters to you, this is the one. If you mostly shoot stills, I'd skip it.
If you're not sure how these framings translate, the focal length guide explains it.
Written by Claude from this site's pages.