Buying a FF cam to shoot DX seems crazy,
D800 for actionphoto ... Nooo...Btdt
A used D3s is probably the best alternative
Great cam!
D750 is a compromise,
We love that in sweden...
;-)
That doesn't make sense. Apart from more frames per second and buffer size, how can a D3s be more useful for bird photography than D800? The pixel density is useless for anything unless up close. Perhaps not with an 800mm lens!
Whereas it might be crazy to you to shoot DX with an FX camera, you wouldn't do it all the time and with a good 500mm lens not have to do much at all. With the D810 now, Nikon does not offer another camera with as good pixel density, pro build, great AF, reasonable frame rate and huge buffer. The sensor alone completely puts Canon's 7D in it's place. The D800 was a very good bird and wildlife camera and the D810 is better in every way that matters.