The Nikon D4 has officially announced on 6 January 2012. The latest 16.2 megapixel professional DSLR camera is capable of shooting at 10 fps (frame per second).The Nikon D4 comes with Nikon’s new Expeed 3 processor, larger 3.2-inch LCD, native ISO of up to 12,800, full HD video recording and will be available in February 2012 for US$ 5,999.95

Here is the summary and specifications:

• 16.2-megapixel FX-format CMOS sensor (36 x 23.9mm)
• 10fps shooting with AF and AE, 11fps with focus and exposure locked, 24fps 2.5MP grabs
• 91,000-pixel 3D color matrix meter, white balance, flash exposure, face detection and active D-lighting
• ISO Range 100-12,800 (extendable from 50 – 204,800)
• MultiCAM 3500FX Autofocus sensor works in lower light and with smaller apertures
• Two sub-selector joystick/buttons for shooting orientation
• 1080p 30/24fps and 60 fps at 720p HD video at up to 24Mbps with uncompressed video output
• New EN-EL18 battery (21.6Wh capacity, CIPA-rated at 2600 shots)
• Twin card slots – one Compact Flash and one XQD
• Integrated Ethernet in the camera
• In-camera High Dynamic Range (HDR) function that merges consecutive exposures
• Bright and scratch resistant 921,000-dot high resolution 3.2-inch LCD screen.
• NIKKOR lens compatibility

source: Nikon Rumors