during continuous shooting are 121 shots for
JPEG Large (at a compression setting of 8) and
28 shots for RAW. When shooting RAW+JPEG (at
compression 8), the maximum burst is 20 shots.
14-bit A/D Conversion
The EOS-1D Mark IV is equipped with a 14-bit
A/D converter which means that tonal grada-
tions for RAW images are now represented by
16,384 separate levels per channel rather than
4,096 of 12-bit. When saved as a 16-bit TIFF
image, the image retains the full range of tones
captured at 14 bits. Moreover, 8-bit-per-channel
JPEG images are generated from the 14-bit data.
Artifacts related to limited dynamic range, such
as tonal skipping and highlight clipping, are
thereby substantially reduced.
New High-Precision AF
System
Improved 45-point AF Sensor
The EOS-1D Mark IV incorporates an amazingly
precise, newly-developed 45-point Area AF sen-
sor. Compared to the 19 points in the previous
Mark III, 39 of the focusing points are cross-
type (provided manual AF point selection is
used), and any of the 45 points can be selected
manually if desired.
When the maximum lens aperture is f/2.8
or faster, the new AF system executes highly
accurate cross-type focusing with f/2.8-equivalent
light flux vertical line detection and f/5.6-equiv-
alent light flux horizontal-line detection. The
center AF point is a cross-type sensor providing
f/4-equivalent light flux vertical-line detection
and f/8 horizontal-line detection. When the
maximum lens aperture is f/4 or faster, the center
AF point provides high-precision cross-type
focusing. When the maximum lens aperture is
f/8 or faster (including the use of an extender),
the center AF point uses horiz ontal-line detec-
tion. Many popular Canon EF Series lenses,
including several with f/4 maximum aperture,
can take advantage of 39 cross-type focusing
point precision with this new system.
More Accurate Focus in More Situations
Both One-Shot AF and AI Servo AF modes are
provided to cover a wide variety
of shooting situations. The AI
Servo AF mode has been re-
engineered to ensure improved
speed and stability with more
reliable focus-tracking per-
formance. The new algorithms
make it possible to more
accurately track subjects that
move irregularly. In addition,
AI Servo AF greatly enhances
macro photography with algo-
rithms that automatically
sense the use of a macro-focus-
ing lens at close distances,
appropriately adjusting AF
operating parameters to better accommodate
unpredictable camera/subject movement.
Powerful, Customizable AF Operation
The photographer can select any one of the 45
AF points manually or allow the camera to make
the selection automatically. To select an AF
point manually, the user can press the AF point
selection button, then use either the Multi-
controller or a combination of the Main and
Quick Control Dials to highlight the desired
point in the viewfinder. As with previous EOS-1
series cameras, the photographer can use a
Custom Function to automatically expand a
manually selected AF point. The expansion of
points can be limited by the user to 19, 11,
inner 9, or outer 9. A Custom Function can also
be used to pre-register an AF point for selection
on demand. Another Custom Function enables
the user to enable or disable the burst of short
flashes when a flash unit without an IR AF-
assist beam is used.
Brilliant 100% High-magnification
Viewfinder
The viewfinder on the EOS-1D Mark IV delivers
exactly what professional photographers want:
a large, bright image that provides clear, accurate
framing, focus and shooting parameter infor-
mation. Most digital SLR viewfinders display
less than 100 percent of the actual capture
area, which makes it difficult, if not impossible,
to accurately frame an image. The EOS-1D
Mark IV viewfinder not only provides approxi-
mately 100% coverage, but also does so with
a high magnification of 0.76. The 28.3-degree
angle of view is also uncommonly wide. The
viewfinder has a high eyepoint of 20mm and
provides built-in dioptric adjustment in the
range of -3 to +1. Photographers can also
choose from a range of optional interchange-
able focusing screens to suit specific needs.
Exceptional Performance
Newly-developed 16.1
Megapixel CMOS Sensor
When it comes to imaging sen-
sor technology, Canon raises the standard for
the industry with innovative in-house develop-
ment and manufacturing advancements
respected across the industry. The EOS-1D
Mark IV features a new Canon CMOS sensor
with a capture resolution of 16.1 Megapixels
(4912 x 3270), providing outstanding imaging
detail. The recording area of the sensor is 27.9
x 18.6 mm (APS-H), yielding a lens conversion
(crop) factor of approximately 1.3 in relation to
traditional full-frame 35mm film.
The latest Canon refinements in micro
semiconductor manufacturing have further
reduced sensor circuitry size. This leaves more
physical space for the photodiode s, enabling
their collective area to be significantly
increased. The larger sensor photodiode area
results in wide dynamic range, elevating imag-
ing performance to a level never before
achieved with such high pixel site density. The
new photodiode design also improves photo-
electric conversion rate, providing a markedly
improved S/N ratio. The resulting boost in
sensitivity makes higher usable ISO speeds
possible. A new fabrication process eliminates
gaps between the microlenses, yielding even
higher light gathering efficiency. The new
CMOS sensor thus delivers a remarkable
combination of high resolution, low noise and
unprecedented high ISO shooting capability.
60
59
Dual DIGIC 4 Image Processors
Developed by Canon, DIGIC Image
Processors are found exclusively in
Canon digital cameras. The EOS-1D Mark IV
incorporates not one, but two DIGIC 4 Image
Processors operating
in tandem to further
b oost performance,
ensuring natural
color reproduction
and handling the data from the new high-
resolution sensor at high speeds for instan-
taneous camera response. This remarkable
parallel processing power makes possible
not only high-speed shooting, but also such
advanced features as Full HD video recording
with comprehensive frame rate options, Live
View with Face Detection AF, HDMI output,
UDMA Mode 6 (CF card) support and
advanced Auto Lighting Optimizer.
Unprecedented ISO Range
Combining the inherent low-noise
performance of the new imaging
sensor and the sophisticated noise reduction
capabilities of the Dual DIGIC 4 Image
Processors, Canon engineers have endowed the
EOS-1D Mark IV with the widest ISO range yet in
an EOS digital SLR: 100–12800 in standard
mode, settable in 1/3-stop increments. In
extended range modes, the photographer can
select a low ISO speed of 50 and one of three
high settings: 25600 (H1), 51200 (H2), 102400
(H3). This greatly expanded capability provides
a previously unavailable range of real-world
shooting options, especially in available-light or
dim situations. Also significant is the camera’s
improved low ISO range performance. The new
Canon CMOS sensor features advancements
that make it possible to operate with reduced
electrical charge saturation. This improves
imaging performance at the low end of the ISO
scale, which can be highly useful when shoot-
ing high contrast scenes with fast (e.g., f/1.4)
lenses. Blown highlights can be avoided, and
photographers can use wider apertures to con-
trol depth-of-field in ways not possible at higher
ISO settings.
The EOS-1D Mark IV now also provides an
ISO Auto option. When this feature is selected,
the camera automatically selects ISO within the
standard range of 100–12800 to provide the
best exposure for the shutter speed and aper-
ture combination selected by the photographer.
Sophisticated Noise Reduction
The advanced algorithms developed for the
powerful Dual DIGIC 4 Image Processors signifi-
cantly improve noise control capability. They
more effectively remove not only color noise but
also luminance noise. This results in dramatic
subjective image quality enhancement because,
while color noise is more readily noticed, lumi-
nance noise affects factors such as perceived
image “naturalness.” At extremely high ISO set-
tings, the EOS-1D Mark IV clearly reproduces
fine detail and subtle gradations. Moreover, all
noise reduction settings other than the highest
(Strong) can now be used without affecting the
camera’s continuous shooting speed.
10.0 fps High-speed
Continuous Shooting
The new CMOS sensor in the
EOS-1D Mark IV features an improved, faster
single-line reading sequence and an 8-channel
signal path that achieve remarkable data
transfer speeds. The camera drive system has
also been enhanced with a two-motor design
and an active mirror bounce suppression
mechanism. These and other advances in the
shutter assembly, autofocus system and Dual
DIGIC 4 Image Processors make possible high-
speed continuous shooting at 10.0 fps at full
16.1 Megapixel resolution. Maximum bursts
A New Standard for Ultra-High-Quality
Rapid-Fire Digital Image Capture
TECHNOLOGY
Canon APS-H (27.9 x 18.6mm) CMOS sensor.
Actual size shown.
EOS-1D Mark IV features an improved AI Servo AF focus
tracking and 10.0 fps high-speed continuous shooting,
for sharp, detailed photographs in every shot.
The 45-point Area AF sensor features 39 cross-type high-
precision AF points with manual AF point selection. Any of
the 45-points are selectable.
C.Fn III-8-1
With single AF
point selected
45-point
19-point
11-point
Inner 9-point
Outer 9-point
AF point manually selected
Points for AF expansion
With two AF
points selected
With right AF
point selected
C.Fn III-8-2
With
C.Fn III-8-3
AI Servo AF
AF Point Expansion
AF Point Registration
AF Point Expansion Selections
Automatic AF point switching to
registered AF point when camera’s
orientation is changed.
Pixel size
[
µ
m square]
ISO speed range
5.7
102400
100 - 12800
H2
L
50
H1
H3
