The next-generation flagship digital SLR camera is equipped with a new Nikon FX-format CMOS image sensor (36.0 × 23.9 mm) and EXPEED 3, the latest image-processing engine specifically optimized for digital SLR camera.

Designed with the ultimate in versatility and functionality that offers superior image quality rich in detail along with excellent high-speed performance.

The Nikon D4 has an effective pixel count of 16.2-million pixels, and offers superior image quality under a broad range of lighting conditions with its image sensor supporting an incredible range of sensitivities from ISO 50 to ISO 204800.  ( via nikon.com.au)