Nikon USA has introduced their new top-of-the-line Digital Single Lens Reflex (D-SLR) camera that designed for high-end professional photographers, called as Nikon D4. Designed like the predecessors (Nikon D3S), the D4 digital SLR camera measures in 6.3 x 6.2 x 3.6 inches with weighs at 47.3 ounces or 1.340kg plus offer improves features and technology. The latest Nikon Digital SLR camera expected will be ready for order in late February 2012 with price tag at $5,999.95.