The range-topping 12.1-megapixel D3 is Nikon's first digital SLR with a full-frame sensor.
Second, it’s Nikon’s first full-frame DSLR, which means that the sensor is the same size as a traditional 35mm frame.
Third, it bridges a gap between its two predecessors, the D2XS and the D2HS. This is possibly the most interesting concept behind the camera. Where previously photographers had to choose between the high resolution D2XS and the low resolution but faster D2HS, the D3 has combined the two into one body. This allows press photographers, say, which is Nikon’s traditional pro market, to shoot high-res for magazine work, or shoot to a fast frame rate for sports or news stories. To a working professional this means they only need to buy one camera, so saving £3,000 immediately.