What is a good, affordable Nikon F or Z Mount, wide-angle, constant aperture, zoom lens for a full-frame camera?

I am looking for an affordable wide-angle, constant aperture, zoom lens for my Nikon Z6. I have the FTZ adapter. I am looking for the following in the lens:
1. Constant Aperture (2.8 or 4)
2. Ability to autofocus with FTZ (not a Screw drive autofocus)
3. Not too expensive (I am a portrait photographer, but I would love to play around with architecture and landscape photos, so the quality does not have to be amazing.)
Thank you for your help!
1. Constant Aperture (2.8 or 4)
2. Ability to autofocus with FTZ (not a Screw drive autofocus)
3. Not too expensive (I am a portrait photographer, but I would love to play around with architecture and landscape photos, so the quality does not have to be amazing.)
Thank you for your help!

If looking for a cheap lens for a bit of a play, just for fun with architecture & landscape I’d probably suggest a couple of manual focus primes via a cheap Chinese adapter.
Let’s be honest these subjects don’t move much and, aside from there being no AF shift lenses, I’ve found AF has enough issues with architecture (the important bits don’t always have high contrast edges) that I’m manually focusing on magnified live view a fair bit anyway.
The really good stuff (Zeiss 21/2.8 or similar) is still pricey, but a Tokina Or Tamron 17mm & Olympus OM 24/2.8 can do a job on 24mp. With a bit of care that pair should be less than £200 all-in and with careful buying can be sold on at very little loss.
Let’s be honest these subjects don’t move much and, aside from there being no AF shift lenses, I’ve found AF has enough issues with architecture (the important bits don’t always have high contrast edges) that I’m manually focusing on magnified live view a fair bit anyway.
The really good stuff (Zeiss 21/2.8 or similar) is still pricey, but a Tokina Or Tamron 17mm & Olympus OM 24/2.8 can do a job on 24mp. With a bit of care that pair should be less than £200 all-in and with careful buying can be sold on at very little loss.

What is your budget - and what tripod do you have?
For landscape and architecture a good tripod is very important.
Do you have Lightroom or something similar to the Lightroom Transform tool in other software?
Improvements in the Transform tool over the last few years may be why Canon has recently withdrawn production of three of its tilt and shift lenses.
For landscape and architecture a good tripod is very important.
Do you have Lightroom or something similar to the Lightroom Transform tool in other software?
Improvements in the Transform tool over the last few years may be why Canon has recently withdrawn production of three of its tilt and shift lenses.

What about the standard z24-70 F4 that comes with it? Or the 16-35 F4?(either Z or G Len’s??) . As for tripod I’m finding with the Z7ii you can hand hold at 1second (ok not a great hit rate, but can be done) the ibis is impressive.
Also how about an old 20mm prime (D) so no autofocus (this is what I intend to do for landscapes), but you can focus peak or full manual (which I’ve done for years anyway).
Also how about an old 20mm prime (D) so no autofocus (this is what I intend to do for landscapes), but you can focus peak or full manual (which I’ve done for years anyway).