Canon EOS-1Dx Manual Book page 22

EOS-1D X 61-Point High-Density Reticular AF Cross-type Points
61-point AF (4) Cross-type points and placement when using an f/8 lens
EF500mm F4L IS II USM
AF shooting is possible using the center AF point even with a maximum aperture value of f/8
When using an extender on the EOS-1D X, AF
is possible using the single center point in the
viewfinder even on a lens with a total maximum
aperture of f/8.
This combination of a lens with a maximum
aperture value of f/4 + Ext EF2x and a lens with
Group H
Single cross-type AF point available
You can carry out AF focusing with a single point, or using the points above, below, to
the left and right. The following AF area selection modes are available: Single-point AF
(Manual), Single-point Spot AF (Manual), and AF point expansion (Above, below, left,
right). The points above, below, to the left and right only function in AF point
expansion and cannot be selected manually.
Major lenses
EF400mm F4 DO IS USM + Ext 2x EF500mm F4L IS II USM + Ext 2x
EF500mm F4L IS USM + Ext 2x EF600mm F4L IS USM + Ext 2x
EF70-200mm F4L IS USM + Ext 2x EF200-400mm F4L IS USM built-in Ext.1.4 + externally-mounted Ext 1.4 EF200-400mm F4L IS USM + externally-mounted Ext 2.0
How to utilize maximum aperture f/2.8 lens + extender EF1.4x and maximum
aperture f/4 lens + extender EF2x
Many large-aperture telephoto lenses (200 to 400mm f/2.8 class) fall into group C when
extender EF1.4x is attached and used at the maximum aperture value of f/4. High-performance
AF is possible due to f/4 support of 20 points out of 41 cross-type points. Additionally, large-
aperture super telephoto lenses (500 to 600mm f/4 class) fall into group H when extender
EF2x is attached and used at the maximum aperture value of f/8. AF focusing is possible using
a single center AF point even with a maximum aperture value of f/8. Using extender lets you
adapt easily for long focal length shooting.
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Extender EF 2x III
a main maximum aperture value of f/5.6 + Ext
EF1.4x belongs in group H. For example, AF
focusing is possible even when shooting with
an EF2x extender attached to an EF500mm F4LII
USM with a focal length of 1000mm, making
extenders even more useful.
f/8 supported cross-type points
f/8 supported points
EF600mm F4L IS II USM + Ext 2x
EF100-400mm F4.5-5.6L IS USM + Ext 1.4
Release property settings during Servo AI
Improved AF performance with AI Servo AF
New!
Improvement of AF performance in low light with AI servo is possible
Firmware
through new parameter settings
Improved AI Servo AF low-light performance through a new algorithm
Visualization of low-light performance
Firmware V1.X
Low-light
performance
3
0 1 2
During halfway press 1st 2nd 3rd
of shutter button shot shot shot
Low-light performance for the first frame of AI Servo AF and while holding down the shutter button halfway is improved
through a modified algorithm.
At default settings, low-light performance is the same as the previous firmware for the second frame and later.
Expanded parameters for [AI Servo 2nd image priority]
The new parameter [+2] lets you maximize low-light performance
Visualization of low-light performance and continuous shooting speed
[-2]
Low-light
1 1
performance
2 3
1st 2nd 3rd 1st
shot shot shot shot
[Shooting speed priority: -2] and [Focus priority: +2] have been added to [AI Servo 2nd image
priority] in [Servo AF shutter characteristics]. [Focus priority: +2] maximizes improved low-light
performance settings for more accurate focusing ([AI Servo 2nd image priority] is explained on
the next page.).
One of the major changes to the new firmware
V2.0 is improved low-light limit performance.
Low-light performance for the first frame of
continuous shooting AI Servo AF (and while
holding down the shutter button halfway) are
improved through a updated algorithm. This is
especially effective when shooting individual
AF2 tab/AF3 tab
Firmware V2.0
Improved
0 1
2
During halfway press 1st 2nd
of shutter button shot shot
[0] [+2]
1 2
2 3
2nd 3rd 1st 2nd
shot shot shot shot
s h o t s u s i n g A I S e r v o A F. A F p re c i s i o n i s
i m p ro v e d f o r d a r k s u b j e c t s i n l o w - l i g h t
situations. The new [+2] parameter added to [AI
Servo 2nd image priority] is maximized during
continuous shooting with a focus on low-light
performance. Because focusing takes priority,
continuous shooting speed drops.
3
3rd
shot
3
3rd
shot
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