Nikon F Mount 2" UltraWide Prime Focus Adapter - TelescopeAdapters
Macro Lens Adapter For Nikon F Lens Mount To 1.25in Eyepiece Telescope Camera Adapter | Fruugo US
Amazon.com : NEEWER T Ring with M42 Threads & 1.25" Telescope Adapter Compatible with Nikon F Mount Cameras & Telescope Eyepieces, Lens Adapter Ring for D850 D750 D500 D780 D7500 D5600 D3500