laowa-8-15mm-f-2-8-ff-zoom-fisheye-review

[Fons Baerken]

https://opticallimits.com/nikon/laowa-8-15mm-f-2-8-ff-zoom-fisheye-review/

Apparently there is a zoom fish-eye from Laowa in z mount., although no electronic coupling.

[Birna Rørslett]

Apparently, excellent optical quality as products from this maker tend to possess. Most of their lens offerings are manual and without electronics, which one simply has to take as part of the deal.

Nikon has its excellent Fisheye Zoom 8-15mm f/3.5-4.5 lens for F mount. It is quite useful on the Z system although handling suffers because of the F-Z adapter. Filtration requires gel filters, which is much more inconvenient than the small dedicated rear filters for the ordinary 16mm Fisheye-Nikkors

[pluton]

I looked online...the AF-S 8-15mm Fisheye apparently has no built-in provision for rear gel filters.  Unless you can place them loose into the rear cavity, which looks to be the same solution for the Laowa. 

[Birna Rørslett]

There definitively is a slot in the rear of the Nikkor 8-15mm for gels. I do use it