Canon EOS-1Ds Mark III Professional Products 2010 Brochure - Page 21

©2009 Peter Read Miller. All Rights Reserved. SPORTS Speed and Accuracy in Autofocus 45-Point Wide Area AF New AF Sensor Sensor vertical-line sensitive at f/2.8 Sensor horizontal-line sensitive at f/5.6 Sensor horizontal-line sensitive at f/5.6 Sensor vertical-line sensitive at f/2.8 The EOS-1D Mark IV has a redesigned, extensively fieldtested and refined, high-precision AF sensor designed for split-second response and spot-on performance no matter the subject. This phenomenal new system includes 45 manually selectable points covering the expanse of the camera's field-of-view, including 39 cross-type AF points for precise and fast focusing in both portrait and landscape modes (with f/2.8 and other EF lenses) no matter the area6.0 AF Point Selection With the EOS-1D Mark IV's new AF system, AF point selection has been improved as well. Photographers can select their own point through either the camera's Multi-controller or Main Dial/Quick Control Dial. Automatic selection is as simple as the press of a button. AF point selection Additionally, photographers can define their own default focus points depending on the camera's orientation when composing in normal, plus grip-up and grip-down vertical positions, instantly switching the AF point according to the position of the camera. Photographers can also program the camera to focus from five predetermined focus zones, and can even choose to have their primary focus point supported by adjacent focus points for more accuracy in motion photography. 60 Spectacular AI Servo II AF The EOS-1D Mark IV's AI Servo II AF mode has been thoroughly redesigned to improve stability, reliability and focus tracking. Directed by an entirely new algorithm, the completely redesigned AI Servo II AF system answers the call of photography professionals for reliable and stable focus and tracking of speedy and irregular movements. While invaluable for sports, the new AI Servo II AF algorithm is precise and responsive AF for subject tracking (C.Fn III -8-3) enough to shoot at high-magnification using macro lenses where the distance between the camera and subject changes rapidly and focus accuracy is critical. 60 I" am knocked out by the Canon EOS-1D Mark IV's autofocus. It combines almost instant focus with incredibly accurate focus tracking. I have shot with this camera in bright sun, in flat lighting and in very low light. In each situation, this camera has out-performed any digital SLR I have ever used. Throw in 10 fps and astonishing high ISO performance and you have the perfect camera for shooting sports, day or night." Peter Read Miller Explorer of Light 42 42