Originally Posted by
arthurking83
For some people, the pixels are irrelevant(eg. me!) for others(say a bird photographer) .. they're important.
I think the camera that's being updated from is going to have an important bearing too.
eg. from a D810, maybe you're right .. the increase in pixels may not be enough, and the D810 already has a usable(but annoying) electronic front curtain(EFC), so to choose the D850 on the basis of an EFC need, would be misplaced.
You'd upgrade from the D810, but not for the EFC.
D800's on the other hand don't have EFC .. I (almost) wanted that from the D810(coming from the D800E), but again, it wasn't all round enough of an upgrade in my mind.
Probably the two single most important aspects of the D850 over the D800/810 would be:
1/. the increased speed of the camera, at up to 9fps with the grip, increased buffer .. ie. infinitely more capable for wildlife/sports/action/etc.
2/. next gen AF ability, from the D5. D5 is considered to be about as good an AF camera as can be had(according to many reviewers testers). D800 is OK, never really missed a beat for me .. dunno about others. Once again, I think this comes down to your usage.
I can imagine a stack of other upgrades over the D800/810 bodies that make the D850 a more meaningful upgrade over the D810, than the D810 was over the D800 bodies.