" 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. "
New 45-Point Autofocus System
The new EOS-1D Mark IV Digital SLR camera features Canon’s most advanced Autofocus system to date. It is equipped with a newly developed 45-point AF sensor featuring 39 high-precision cross-type AF points, and an all new AI Servo II AF mode that gives still photographers the power and performance to track and focus a fast-moving subject at speeds up to 10 frames per second. With more than twice as many cross-type focusing points as the EOS-1D Mark III and a new AF sensor construction that improves performance in low light and with low contrast subjects, the EOS-1D Mark IV has greater subject detection capabilities than any previous EOS model. To complete the range of AF improvements, Canon has developed a new AI Servo II AF predictive focusing algorithm that significantly improves responsiveness and stability by making better decisions on focus tracking in a variety of shooting conditions.