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Yes, D5100 and D7000 had same sensor and both had DxOMark scores of 80. Maybe the D7000 will have a DxOMark score of 84 like the D5200. Any difference in DxOMark scores between the D5200 and the D7200 may be due to software tweaks. However, the D400 is quite likely to have a different sensor. But the point is well taken, if the D7200 scores equal to the D5200 that leaves a 5 point gap to fill for the D400 to equal the D4s score of 89.
One of the nice things about this thread is one gets to vote as many times as you like...LOLI will take a stand and say if the next "pro" DX body does not have a native ISO of 12,800, ............, but my strong suspicion is that before the end of 2014 we will see changes like never before.
That's like saying the D300s sensor should have matched the D3s, or it wouldn't sell. I just fail to see the logic in your argument.
I cant see how the D400 can possibly equal the D4 high iso without a paradigm shift in sensor design. its always been clear that the same generation DX sensors will be at least 1 stop weaker than the FX counterpart.
I... UNLESS that D400 offers something the D800 doesn't. What could that extra thing be? How about good native ISO up to 12,800 and faster ..................? To appeal as a second body that D400 will have to offer something you cannot get in a D800.
In regards to your question Mr. xxxxxx the D5100 camera body is a upgrades .
You are aware that F/2 brings twice as much light as F/2.8, yet MFT is about 2× smaller than DX and 4× than FX? Also, you are aware that firstname.lastname@example.org(FX or DX) is shallower than 35@f/2(MFT)? Also, besides the above mentioned, the smaller sensor will always be behind the larger sensor due to diffraction.