“The Nikon D4 is an extremely well built and responsive camera that seems to react instantly to anything you throw at it.“
PhotographyBLOG has published their review of the full-frame Nikon D4 with 16MP (36.0 x 23.9 mm CMOS sensor FX format), 51-point AF system, 3.2-in. (921k-dot) LCD, Eye-level pentaprism single-lens reflex viewfinder, Shutter Speed 1/8,000 to 30 sec. plus bulb, Continuous shooting 10fps, MUP (mirror up), Picture Control System, PASM, Advanced Scene Recognition System, RAW, ISO 200 to 12800 (expandable from ISO 50 to ISO 204800 equivalent), i-TTL balanced fill-flash and Active D-Lighting, Live View, and Full HD 1,920 x 1,080 30p/25p/24p with built-in monaural (or optional external stereo) microphone. The D4 has dual card slots and accepts XQD and Type I CompactFlash memory cards (UDMA compliant).
Read the Nikon D4 Review @ PhotographyBLOG.