Perhaps as my first post I should pick a less volatile subject than the 36MP sensor size on the D800 but I really wanted some feedback on whether I am “getting” it or not on this issue. I have a D300 which has treated me well for several years but I have the bug to upgrade. When I compare the sensor size & effective pixels of the D300 to the new D800 the pixel density is about 28% more even though the effective pixels are 3 times greater. Do I have that math right? If so, it’s about the same as the D7000 today. I also use a Sony NEX C3 (I know; I shouldn’t mention this) and its pixel density is a tad higher than the D800 with half the pixel count. Very decent results particularly in low light, but a different animal all together. My question would be isn’t the pixel density every bit as important as the raw pixel count as we conjure with how this new beast is going to operate and how touchy it may be to camera movement or sloppy focus techniques etc.