Following up closely on Nikon’s most recent D3s offering, Canon replies quickly with their EOS-1D MARK IV DSLR. The 16 MP 1D MARK IV appears to match the D3s stride-for-stride in addition to providing true 1080p high-definition video.
Some other interesting aspects of the camera include 45-point autofocus system, an ISO range up to 102,400, 10 fps shooting modes and a Dual Digic 4 image processors. The camera should hit retailers before the end of the year in December.
 Offering a comprehensive combination of speed, accuracy and image quality, the EOS-1D Mark IV is the perfect choice for professional photographers and subjects on the move.
With a completely redesigned 45-point AF system including 39 cross-type points, a new AI Servo II AF focus tracking system with improved algorithm combined with 10 fps continuous shooting, the EOS-1D Mark IV can handle even high-speed situations with ease.

  An APS-H sized 16.1 Megapixel CMOS Sensor, Dual DIGIC 4 Image Processors, a spectacular ISO range of 100 - 12800 (up to 102400 in H3 mode) with an advanced noise reduction system helps ensure sharp, low-noise images even in low-light situations.
Add advanced Live View shooting, Full HD movie recording with selectable frame rates and manual exposure control plus a host of new features that enhance every facet of the shooting process.
The EOS-1D Mark IV is the choice of professionals looking for the ultimate in SLR performance.