Digging into the specs a bit more, and comparing the latest 5-series to all previous Nikon camera releases, I don't think we've ever seen a two stop max ISO increase. Granted, the published ISO numbers are marketing numbers, but there is a consistency to them. Also this is the first time ever that we've seen a three
stop improvement in extended ISO. That's the D5 compared to the D4s, looking at the D7200 compared to the D500 we see a one stop bump in max ISO, but a four
stop ISO in extended. (Personally I think the max ISO on the D7200 is inflated it should also be a 2/3 max/extended increase).
Nonetheless, we see two obvious things. One, Nikon clearly has breakthrough sensor tech here, probably BSI like they used on the J5. I'll bet it's a Nikon design, and BSI would account for the higher low-light performance. The extra-extra bump on extended ISO likely comes through better noise reduction algorithms in expeed 5. Two, Nikon has two sensors, developed side by side, exact same specs and tech, the only difference is size. DX vs. FX. And one stop of light, exactly predicted by the difference in size. This is sort of a rare occurrence, like identical twins, and it will (hopefully) allow us to put the DX vs. FX arguments to bed once-and-for-all.
I wanted to start a new thread to speculate on these twins, and track the info we find as folks eventually get these in their hands for testing and tear down. I want to focus specifically on the sensors and related technology like expeed 5. Thoughts?