Nikon has tweaked just about everything that could be tweaked in its predecessor, D700. At the heart of it is a 36.3-megapixel full-frame (FX format) CMOS sensor. That's coupled with the Expeed 3 image processor. As a result, it has a maximum resolution of 7360 x 4912. That's roughly 150% the pixel count of Nikon's flagship D3X DSLR. To help accomodate all that data, is has both an SD and a CF card slot. It doesn't, however, accept the new XQD cards like the D4.