I purchased a Kolari IR clip-in filter for the Z cameras. Had Kolari also shipped the magnetic fastener plate I ordered, the setup might fit for field testing. As they didn't even though I had paid for the item, the filter rattles inside the camera mount so I won't use it for any serious business until the missing item arrives. If it ever manifests itself. Without the internal filter being held in position, image sharpness certainly will suffer, and this fact showed itself clearly on my test pictures.
Any way, I availed myself of the opportunity to mount a few assorted fisheye lenses to the IR-modified Z cameras. Here the tiny Meike 4mm f/2.8 fish was abused by me on the Z5. The lens is not bad, despite the various flare spots some of which might be caused by the Kolari (?) and considered its very low price, might even be value for the money. Do remember it is designed for DX, however. Thus the image circle on the FX models is on the small size. The Sunex 5.6mm f/5.6 or any of the various Fisheye-Nikkors would be a better option for FX. The Meike is claimed to cover 220 degrees and most frames either had my fingers inside the image circle, or my feet, or both.
