Is the internal zoom worth it over the original 24-70mm f/2.8 S?

If you shoot on a gimbal or handheld for long days, yes. The fixed-length barrel keeps the balance steady and the lens is lighter. The original is still a strong optical performer and may suit stills-only shooters.

Does it work on APS-C Z cameras?

Yes, it mounts on Z-mount DX bodies such as the Z50II and Z fc, where it gives a roughly 36-105mm equivalent range. It is large and heavy for those bodies, so most buyers pair it with full-frame Z cameras.

Does it have image stabilization?

No. It relies on the camera's in-body stabilization, which most full-frame Z bodies have. On a gimbal the internal zoom helps more than stabilization would.

How fast and quiet is the autofocus?

Nikon claims up to 5x faster and 50% quieter focusing than the previous version thanks to the voice-coil motors. It tracks well for stills and is quiet enough for video.

The lens comes with front and rear caps, a lens hood and a soft case. A tripod collar is not included because the lens does not need one.

Is it weather sealed?

Yes, it has dust- and drip-resistant sealing around the mount and barrel joints, matching Nikon's S-Line build. It is not waterproof, so use a cover in heavy rain.