TechRadar - Nikon has said that it views the accuracy of its AF points as more important than having more points towards the edge of the frame.
Although both the Nikon D800 and Nikon D4 utilise a 51 point autofocus system, all of these are clustered together in the centre of the frame, within the DX cropping frame.
Other cameras, including DX (APS-C format) SLRs, but particularly compact system cameras, have autofocus points available right up to the edge of the frame.
Nikon D6 FX-Format Digital SLR Camera is now available on Amazon.
Amazon has opened pre-orders for the Nikon Z50 Creator's Kit.
Nikon introduced the D6 full-frame DSLR Camera for professionals who want high reliability and performance. Allegedly, this camera uses "the most powerful autofocus system in Nikon history”. The camera also features “unprecedented performance in low light”, “advanced multimedia capabilities of 4K UHD” and “stunning burst speed”.