Canon EOS-1Dx Manual Book page 21

EOS-1D X 61-Point High-Density Reticular AF Cross-type Points
61-point AF (2) The number and placement of cross-type points used by the f/4 lenses
EF70-200mm f/4L IS USM
41-point cross-type AF points can be used
In Group C, 41-point cross-type AF points can
be used with lenses having an f/4 maximum
aperture (or f/2.8 maximum aperture lenses
using the EF 1.4x Extenders). Of these, the 20
points on the left and right are f/4 and f/5.6
Group C
41-point cross-type AF points available,
and they can be used with a high level
of tracking performance
AF focusing is possible with all 61 points.
All AF area selection modes are available.
Major lenses
EF50mm f/2.5 Compact Macro EF100mm f/2.8L Macro IS USM
EF200mm f/2.8L USM + Ext EF1.4x EF200mm f/2.8L II USM + Ext EF1.4x
EF300mm f/2.8L IS USM + Ext EF1.4x EF300mm f/2.8L IS II USM + Ext EF1.4x
EF400mm f/2.8L II USM + Ext EF1.4x EF400mm f/2.8L IS USM + Ext EF1.4x
EF135mm f/2L USM + Ext EF2x EF200mm f/1.8L USM + Ext EF2x
EF8-15mm f/4L Fish eye USM EF17-40mm f/4L USM
EF70-200mm f/4L USM EF70-200mm f/4L IS USM
EF70-200mm f/2.8L IS USM + Ext EF1.4x EF70-200mm f/2.8L IS II USM + Ext EF1.4x
EF500mm f/4L IS II USM EF600mm f/4L IS USM
Group I
31-point cross-type AF points available
10 cross-type points supported f/4 + f/5.6
Major lenses
EF200-400mm F4L IS USM +Ext x1.4 (When not using built-in Ext x1.4)
AF can be carried out using 61 points (cross-type focusing is possible
with 31 points). You can choose all AF area selection modes.
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EF 17-40mm f/4 L USM
cross-type AF providing even higher precision
focus in these areas than with previous cameras.
Some macro lenses with a maximum aperture
of f/2.8 are also included.
EF300mm f/4L IS USM
EF300mm f/2.8L USM + Ext EF1.4x
EF400mm f/2.8L USM + Ext EF1.4x
EF400mm f/2.8L IS II USM + Ext EF1.4x
EF200mm f/2L IS USM + Ext EF2x
EF24-70mm f/4L IS USM EF24-105mm f/4L IS USM
EF70-200mm f/2.8L USM + Ext EF1.4x
EF500mm f/4L IS USM
EF600mm f/4L IS II USM
61-point AF (3) The number and placement of cross-type points used by the f/5.6 lenses
EF100-400mm f/4.5-5.6L IS USM
Majority of lenses can make use of the central 21-point cross-type AF
With the exception of a small group of lenses
(groups F and G), almost all lenses that have a
m a x i m u m a p e r t u re o f f / 4 o r g re a t e r a re
included in Group E, and can use the 21-point
Group E
The central 21-point cross-type
AF can be used
AF focusing is possible with 61 points. All
AF area selection modes are available.
Major lenses
EF50mm f/2.5 compact macro + life size converter EF
EF400mm f/5.6L USM EF500mm f/4.5L USM
EF300mm f/4L IS USM + Ext EF1.4x EF400mm f/4 DO IS USM + Ext EF1.4x
EF600mm f/4L USM + Ext EF1.4x EF600mm f/4L IS USM + Ext EF1.4x
EF200mm f/2.8L II USM + Ext EF2x EF300mm f/2.8L USM + Ext EF2x
EF300mm f/2.8L IS II USM + Ext EF2x EF400mm f/2.8L USM + Ext EF2x
EF400mm f/2.8L IS USM + Ext EF2x EF400mm f/2.8L IS II USM + Ext EF2x
EF600mm f/4L IS II USM + Ext EF1.4x EF70-200mm f/2.8L USM + Ext EF2x
EF70-200mm f/2.8L IS II USM + Ext EF2x EF70-200mm f/4L USM + Ext EF1.4x
EF28-300mm f/3.5-5.6L IS USM EF70-300mm f/4-5.6 IS USM
EF70-300mm f/4.5-5.6 DO IS USM EF100-400mm f/4.5-5.6L IS USM
Group F
21-points cross-type available, total of 47 AF
points available to select
Major lenses
EF800mm f/5.6L IS USM
EF35-350mm f/3.5-5.6L
USM
AF focusing is possible with 47 points (61-point AF is not possible).
All AF area selection modes can are available.
EF70-300mm f/4-5.6L IS USM
cross-type AF (f/5.6 cross-type) in the central
area. Many f/2.8 maximum aperture large
aperture telephoto lenses when used with the
various EF 2x Extenders will fit into this group.
EF100mm f/2.8 Macro USM
EF300mm f/4L USM + Ext EF1.4x
EF500mm f/4L IS USM + Ext EF1.4x
EF200mm f/2.8L USM + Ext EF2x
EF300mm f/2.8L IS USM + Ext EF2x
EF400mm f/2.8L II USM + Ext EF2x
EF500mm f/4L IS II USM + Ext EF1.4x
EF70-200mm f/2.8L IS USM + Ext EF2x
EF70-200mm f/4L IS USM + Ext EF1.4x
EF70-300mm f/4-5.6L IS USM
EF200-400mm f/4L IS USM +Ext EF ×1.4 (*1
*1 When using built-in Ext EF x1.4 or externally-mounted Ext EF x1.4
Group G
15-points cross-type available, total of 33 AF
points available to select
Lenses
EF180mm f/3.5L Macro
USM
EF180mm f/3.5L Macro
USM + Ext EF1.4x
EF1200mm f/5.6L USM
AF focusing is possible with 33 points (61-point AF is not possible).
All AF area selection modes can are available.
"Ext EF1.4x" an abbreviation of various EF1.4x Extenders
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