<p>Eric, <br>
Sorry I quoted a single test point (not a statistic, that's for politicians and sales), but not sorry you commented. In the DxO measurement area there are sets of full SNR plots for 9 or 10 different ISO values. As it turns out, the D750 is roughly a bit over 3 db most samples for each location on each of the 9 graphs. 3db would be 2x, a bit over 3db is somewhat over 2x. You correct, it tells me nothing about how this holds at different shutter speeds but is does tell me that the D750 will give me better noise performance at any given ISO. I am willing to believe that a greater than 2X value in DxO's test results have noticeable results in the real world. Since they don't fully disclose their test setup and testing procedure, you should of course remain skeptical.<br>
Personally, I am willing to trade a higher resolution shot for some ISO. This causes me to carry a lens with a larger aperture or settling for a slower shutter speed; I usually carry a monopod to help the slower shutter If quality telephoto lenses were made for crop sensor cameras, they could be faster at the same size and weight, then there would be much less reason to even consider a full frame.<br>
Tony D</p>