Canon EOS-1D X Af Setting Manualbook page 45

Image/Focusing parameter for One-Shot AF
[Set in the AF3 tab]
With stationary subjects: place a priority on confirming
sharp focus or releasing shutter without any delay
[One-Shot AF release priority]
EOS-1D X allows almost total control over how
the camera works in the photographer's hands.
One aspect of this is the balance between
instant shutter response and the need to
confirm sharp focus before shooting.
Moving subjects, with AI Servo AF:
The EOS-1D X handles what happens when
the user first presses the shutter button fully (AI
S e r v o 1 s t i m a g e p r i o r i t y ) a n d h o w a n y
subsequent shots in a continuous sequence are
treated (AI Servo 2nd image priority) separately.
With [Focus priority], shooting is delayed
until after the camera has focus on a subject
(this could be by just a few milliseconds). With
[Release priority/Shooting speed priority] ,
shooting takes place instantly, with minimal
delays — out of focus images may occur. The
Focus priority
You cannot shoot a pic ture unless it is in focus. This is
ef fe c ti ve w hen you want to confirm shar p fo cus on a
stationary subject.
Release priority
P riorit y is on bri ef "lag tim e," rather than fo cus . I t is
re comm end e d onl y w hen you want to put priorit y on
capturing brief photo opportunities rather than focus.
default [Equal priority] sets equal priority on
both (attempting to focus without major delays
to shutter release timings), ideal for most
shooting situations. To make use of low-light
performance improved by the firmware upgrade
during continuous shooting, set the AI Servo AF
[2nd image priority] parameter to [Focus
priority: +2].
Stationary subjects, with One-shot AF:
Historically, EOS cameras have been factory-
set to give Focus Priority here. However, in the
AF3 menu tab, EOS-1D X users are free to
adjust this, with [One-Shot AF release prior.]
• [Focus priority]:
Camera won't fire until focus confirmed
• [Release priority]:
Camera will fire, without delay
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