Nikon officially introduced its upgraded D3 dSLR camera with the announcement of D3X dSLR camera. The Nikon D3X dSLR is a FX-format camera having 24.5-megapixel (6048 x 4032) CMOS sensor, producing TIFF, JPEG or NEF (RAW) formats, expandable ISO sensitivity up to 6400, continuous shooting speed at full resolution of 5 frames per second, hi-speed USB and HDMI interface, and enhanced EXPEED™ Image Processing System.

“In 2007, the 12.1-megapixel FX-format D3 delivered groundbreaking digital SLR image quality, coupled with incomparable high ISO, low noise performance and high-speed handling. In doing so, the D3 broke photographic barriers, enabling photographers to work in ways never before possible,” said Edward Fasano, general manager for Marketing, SLR Systems Products at Nikon Inc. “Now, the new 24.5-megapixel FX-format D3X D-SLR provides the extreme resolution and high dynamic range capabilities needed to meet the extraordinary needs of photographic disciplines such as high fashion, commercial advertising and fine art. The D3X delivers this remarkable capability while fitting seamlessly within the Nikon system, taking full advantage of Nikon’s world-renowned collection of NIKKOR lenses and Speedlights.”

Detailed specification below and pricing.

• Extreme resolution 24.5-megapixel FX-format (35.9 x 24.0mm) CMOS sensor
  Large 5.49µm pixels capture astonishing detail and subtleties with outstanding dynamic range for demanding commercial applications.
• Nikon EXPEED image processing technologies
  EXPEED extends and assures breathtakingly rich image fidelity and reduces noise, even at high ISOs.
• 138 MB¹ Processed NEF (RAW) 12 or 14 bit image files
  Selectable bit depths of 12-bit (4,096 tones) or 14-bit (16,384 tones), both yielding incredible image quality through a 16-bit processing pipeline, for smoother tonal gradations.

  ¹ Approximate

• Low noise ISO sensitivity from 100 to 1600
  Added ISO settings of Lo-1 ISO 50, Hi-1 ISO 3200 and Hi-2 ISO 6400 extend versatility.
• Two Live View shooting modes
  Two Live View modes add flexibility, and up to 27x magnification in the Tripod Mode, acute focusing accuracy is easily confirmed.
• Continuous shooting at up to 5 fps at full FX-format resolution
  Commercial image quality teams with speed and handling to create new shooting possibilities—in the studio or on location.
• Fast, accurate 51-point AF system
  AF system features 4 Dynamic AF modes, including 3D Focus Tracking, for autofocus precision and razor sharpness.
• 1,005-Pixel 3D Color Matrix Metering II with Scene Recognition System
  Two Nikon-exclusive technologies provide intelligent auto exposure capabilities, along with refined auto white balance detection and faster, more accurate AF performance.
• 3-inch super-density 920,000-dot VGA LCD monitor
  Individual factory calibration assures the color accuracy of each D3X monitor for critical image review.
• 100% viewfinder coverage
• Nikon Picture Control
  Four preset options: Standard, Neutral, Vivid and Monochrome, and 9 customizable settings provide advanced, personalized color control.
• Rugged, durable and precise magnesium-alloy construction
  Effectively protected from invasive dust, moisture and electromagnetic interference with a self-diagnostic shutter mechanism tested to 300,000 cycles.
• Dual CF card slots with overflow, backup and copy options
• Virtual Horizon Graphic Indicator
• Up to 4,400 images per battery charge

More specs on Nikon site here.

The Nikon D3X will be available at Nikon Authorized Professional Dealers starting December 2008, and will be available for an estimated selling price of $7999.95.