Professional Brochure

31
I
am knocked out by
the Canon EOS-1D
Mark IV’s autofocus. It
combines almost instant
focus with incredibly
accurate
focus track-
ing. I have
shot with
this camera
in bright sun, in flat
lighting and in very
low light. In each situ-
ation, 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
45-Point Wide Area AF
The EOS-1D Mark IV has a redesigned, extensively field-
tested and refined, high-precision AF sensor designed
for split-second response and spot-on performance no
matter the subject. This phenomenal 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 area.
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.
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 predeter-
mined focus zones, and can even choose to have their
primary focus point supported by adjacent focus points
for more accuracy in motion photography.
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 advanced
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
high-tech AI Servo II AF
algorithm is precise and
responsive enough to shoot at high-magnification using
macro lenses where the distance between the camera and
subject changes rapidly and focus accuracy is critical.
“
78
©2009 Peter Read Miller. All Rights Reserved.
AF point selection
Sensor horizontal-line
sensitive at f/5.6
Sensor vertical-line
sensitive at f/2.8
Sensor vertical-line
sensitive at f/2.8
Sensor horizontal-line
sensitive at f/5.6
AF Sensor
AF for subject tracking (C.Fn III -8-3)
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78
Speed and Accuracy
in Autofocus
SPORTS