One of the most significant and obvious changes is the sensor, Nikon utilized h a JFET sensor in the D2H/D2Hs (with mixed results) but with the D2X have moved to a new APS sized CMOS sensor (just like Canon). The D2X's CMOS sensor packs 12.84 million pixels into a 23.7 x 15.7 mm area, a pixel pitch of 5.5 x 5.5 µm. The D1X had a slightly odd rectangular photosite layout with a pixel pitch of 5.9 x 11.9 µm (twice as many horizontal photosite's as vertical), the 'input pixels' of 4028 x 1324 were then interpolated to 3008 x 1960 which produced very good horizontal resolution but slightly less vertical resolution (the overall results however were very impressive).



Link: DP Review