I use two D850's, so I am going to join the group that is saying you should try to save up for that. A D4 (or D3) is a huge gripped body, so you have to make sure you are comfortable using a camera that heavy. I rented one (D5 I think) and it was too much for me. D850 is just about perfect for me.
Someone mentioned 9fps on D850, but that is only if you get the optional battery grip and larger battery holder (which is not only heavy it's a thousand bucks which is a ripoff IMO, though you can get third party much less). The camera on its own is native 7fps.
One thing Nikon improved on D850 over previous models is the focus assist beam. On the D850 (and I think all subsequent models including mirrorless) they made it an infrared beam that is invisible to the naked eye, just like Canon always did. D850 was my first Nikon camera but my brother had D800 and D810 and they had a bright white focus assist beam. In low light it is hugely annoying.
Someone mentioned 9fps on D850, but that is only if you get the optional battery grip and larger battery holder (which is not only heavy it's a thousand bucks which is a ripoff IMO, though you can get third party much less). The camera on its own is native 7fps.
One thing Nikon improved on D850 over previous models is the focus assist beam. On the D850 (and I think all subsequent models including mirrorless) they made it an infrared beam that is invisible to the naked eye, just like Canon always did. D850 was my first Nikon camera but my brother had D800 and D810 and they had a bright white focus assist beam. In low light it is hugely annoying.
