Canon EOS 1D MARK IV BROCHURE

Technology Features

New AF system & Wide ISO Speed Range

The EOS-1D Mark IV,
heritage and innovation combined

The EOS-1D Series, launched in 2001, combined exceptional image quality and superb
handling. Canon’s goal was to empower photographers to be able to confidently capture
decisive moments even in the most challenging shooting conditions. Since its inception, the
EOS-1D Series has evolved in performance and functionality without Canon ever wavering
from its vision. Every improvement further enhanced the ability of these cameras to capture
the decisive moments. As the new flagship of the EOS-1D family, the EOS-1D Mark IV
carries on this proud tradition.

The EOS-1D Mark IV is a showcase of Canon’s cutting edge innovation. Through advanced
semiconductor, mechanical and material technology, refined manufacturing processes, and
even cognitive science, the EOS-1D Mark IV has been designed to surpasses current camera
limitations to achieve unprecedented response and performance. In challenging shooting
conditions, regardless of shooting style and subject, the EOS-1D Mark IV delivers reliability
and precision that allows the photographer the freedom to capture the image no matter
what. Incorporating the heritage of its EOS predecessors with latest technological advances,
the EOS-1D Mark IV provides professionals with the ability to capture outstanding images
with greater confidence than ever before.

More than a new chapter in the continuing story of the evolution of EOS, the EOS-1D Mark
IV represents a new beginning, to establish a new foundation for the future of digital
cameras. Though a combination of proven innovation and fresh ingenuity, professionals are
empowered to challenge the very limits of their photographic potential.

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AF

Technology

Vision as good as the human eye. New 45-point AF for life’s decisive moments.

Canon introduces the ultimate autofocus system.

The human eye focuses instantaneously and a camera’s AF system should as well. The closer autofocus comes to the speed, accuracy, and
selectivity of the human eye, the better the chance of capturing moments that can be missed in the blink of an eye. To develop an AF system
that more closely approaches the responsiveness of the human eye, Canon focused on tightly integrating the three main AF components:
in-lens drive motor, cross-type AF sensors, and a multi point AF system.

This approach, seen at it’s pinnacle in the EOS-1 series cameras, has thrust Canon to the forefront of autofocus technology. The
world-renowned AF systems found in EOS cameras are rivaled in performance only by the human eye. In essence, Canon has redefined
autofocus, elevating it from mere “convenience” to that of a precision tool that allows professionals to capture life’s decisive moments.

Human Eye Behavior

Timing

Conditions

Selectivity

Immediately focuses on subject

Handles various lighting and subjects

Accurately focuses on desired area

Components

Speed and responsiveness
Dynamic tracking ability
Subject tracking ability
Defocus ability

Different subjects
Different light sources
Low brightness / low contrast

Precision
Selectable from various AF points
Extended area

Canon Technology

In-lens drive motor, USM, high-speed processing
Predictive algorithm
High-density of pixels on AF sensor
AF sensor optimized for f/5.6 light flux

Cross-type metering
Automatic compensation through light source detection
High-sensitivity AF sensors

AF sensor optimized for f/2.8 light flux
Multi Controller, Custom Functions
Large, elliptical sub-mirror, Z-shaped light path

45-point Area AF — Innovative technology for more responsive autofocus.

When first introduced, autofocus was limited to one AF point. Canon pioneered multi point AF systems introducing a five-point system
arranged in a line. Compared to the human eye, however, which moves freely to select subjects, the linear arrangement failed to provide the
coverage needed to replicate this mobility. What was needed was a revolutionary type of autofocus that would not only cover the entire
scene, but also achieve precise focus with virtually any subject. Without these capabilities, an AF system could not fully satisfy the needs
of professionals.

Enter Canon, with a groundbreaking 45-point Area AF system.

Area AF is improved by increasing the number of cross-type AF points, which allows focusing on a wide range of subjects.
The EOS-1D Mark III, Canon’s first camera with Area AF, featured 19 cross-type AF points and 26 assist points, heralding a new age in
autofocus technology. This AF system included an aspherical secondary image-forming lens that allowed the entire AF area to contain
high-precision cross-type AF points — an innovation that elevated AF response and range to even higher levels of performance.

EOS-1D Mark IV autofocus just like the human eye.

Technological advancements and the ever increasing demands of professional photographers made introduction of our 45-point Area AF
system essential — to produce autofocus so advanced it rivals the human eye. Containing 39 cross-type AF points and 6 line points, the new
AF sensor offers better stability, reliability, and precision. What’s more, the system is based on a highly reliable mechanical design and
advanced manufacturing processes that meet Canon’s high standards for optical performance and quality control.

Center-cross AF point

The central AF point is a cross-type AF
point providing vertical line detection at
f/ 2.8-f/4 light f lux and h or izon ta l li ne
detection at f /5.6, deli ve ri ng precision
cross-type focusing for all EF lenses f/4 or
faster. In addition, horizontal line detection
can be performed with slower f/8 lenses such
as when using an extender.

Cross AF point

Cross-type AF points provide vertical line
detection at f/2.8-f/4 light flux and horizontal
line detection at f/5.6. The new Area AF
system enables cross-type autofocus with all
EF l enses faster than f/2.8 (m aximu m
aperture) plus a limited number of lenses
with apertures of f/4.
* f/4 lenses that support cross-type focusing
within the 39-point AF frame:
EF17-40mm f/4L USM, EF24-105mm f/4L IS
USM, EF70-200mm f/2.8L IS USM with
Extender EF1.4 x II, EF200mm f/2L IS USM
with Extender EF2 x II, EF300mm f/2.8L IS
USM with Extender EF1.4 x II, EF400mm
f/2.8L IS USM with Extender EF1.4 x II

EOS-1D Mark IV (2009)

Any of the 45 AF points can be selected.

: f/2.8-compatible AF points
(center AF point compatible at f/4)

: f/5.6-compatible AF points
(center AF point compatible at f/8)

AF points

Horizontal line detection with f/5.6 light flux.
These AF points can be selected manually.

Auto AF point selection is frequently used in unpredictable situations, making fast performance a priority. Setting the number of cross-type
AF points to 19 via the Auto Selection Custom Function optimizes the efficiency of the f/2.8 line sensors, providing the EOS-1D Mark IV
with lighting-fast response.

New AI servo II AF combines responsiveness and stability.

Employed by EOS-1V (2000) and also used by EOS-1D (2001).

: f/2.8-compatible points (center AF point compatible at f/4)
: f/5.6-compatible points

Employed by EOS-1D Mark III (2007).

: f/2.8-compatible points (center AF point compatible at f/4)
: f/5.6-compatible points

Canon’s 45-point Area AF was made possible by a unique AF optical system that employs a large elliptical sub-mirror. A total of 45 AF points
comprised the focusing area — an innovation that dramatically enhanced the freedom of composition and dynamic tracking. This system also
employed a seven cross-type AF points optimized for f/2.8 and f/5.6 light flux, resulting in reliable autofocus no matter what the subject.

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The highly responsive autofocus of EOS-1D cameras makes them excellent for situations requiring continuous shooting at approximately 10
frames per second. The only drawback is the ultra-fast responsive AF system can detect objects that may encroach between the camera and
subject, leading to autofocus errors when the AF point is not positioned on the subject. In the past, this could partially be rectified via
Custom Functions. Canon, however, developed the EOS-1D Mark IV with an intelligent new AI Servo algorithm that solves this problem.
As a result, both AF responsiveness and ability to stay focused on a moving subject even if it leaves the AF area for a short time, have been
made possible without having to rely on setting Custom Functions.