Nikon D4 Key Features :
- 16.2 Megapixels.
- extended ISO (204,800 at Hi-4).
- New FX-format sensor.
- Video 1080/30p.
- 921k-dot 3.2-inch LCD.
- 10 fps stills at full resolution with full auto focus and exposure.
- 51-point AF system.
- two card slots - UDMA-7 CF and XQD format.
[SOURCE]