For a while now DXO’s dominance, objectivity, and legitimacy have been in question and the recent release of the Nikon D850 results should require further explaining. Photons to Photos has quickly become the gold standard for quick and objective sensor dynamic range measurements and while DXO’s results somewhat match Photon on Photo’s results, DXO seems to favor the Nikon D850 giving it a 2 point overall lead.
Photon’s final results are very clear that the D850 has some advantages in dynamic range, but the a7RII wins at the vast majority of ISO levels. While DXO breaks their testing down more and requires you to juggle more factors. Under measurements, the ISO sensitivity is about even, while the Sony a7RII has a consistently higher signal to noise ratio, but under dynamic range, the D850 has an edge until between 800/1600ISO where the a7RII gains the lead, with the a7RII then having the higher tonal range and color sensitivity.
When comparing DXO and Photon on Photos base ISO results there seems to be a pretty big difference here that might account for the 2 points that DXO awarded, but I just don’t see if form the data. DXO more heavily favors the Nikon D850’s base ISO than Photon on Photos does, which might account for the score, but I doubt it. Of course, you are free to come up with your own conclusion, but the D850 seems to be a Nikon a7RII several years after the fact. Hopefully, Sony doesn’t delay the release of the Sony a7RIII much longer. The Kumamoto earthquake really messed up the release schedule.
Sony a7rII B&H Photo / Amazon / Adorama
Nikon D850: B&H Photo / Amazon / Adorama
