Solmeta Geotagger Pro 2 GPS Unit with Pro2 USB Cable, Cable-D (for Nikon D5, D850, D810/810A, D800/D800E, D500, D4, D3-series, D700, D300-series, D2X, D2XS, D2HS, D200) at KEH Camera
Everything You Need to Know About the Nikon D850
Nikon D850 Review: The best SLR Nikon's made. Ever.
Best Nikon DSLR GPS - Terry White's Tech Blog
GPS for Nikon D850 & American White Pelicans | Backcountry Gallery Photography Forums
Geo tag NEF precisely: Nikon FX SLR (DF, D1-D5, D600-D850) Talk Forum: Digital Photography Review
Micnova GPS-N Plus GPS Receiver/ Geotagger for Nikon DSLR Camera | eBay