Canon EOS 10D Digital Instruction Manual page 151

C.Fn-16 Safety shift in Av or Tv
Safety shift can be set for the shutter-priority AE and aperture-
priority AE modes.
0: Disable
1: Enable
If the subject's brightness changes suddenly and the current
shutter-priority AE or aperture-priority AE setting becomes
unsuitable, the shutter speed or aperture is shifted to obtain a
proper exposure.
C.Fn-17 Lens AF stop button function
0: AF stop
1: AF start
AF operates only while the AF stop button is pressed. While
you press the button, AF operation with the camera is
disabled.
2: AE lock while metering
When you press the button while metering timer is still active,
AE lock takes effect. Convenient when you want to focus and
meter separately.
3: AF point:M→Auto/Auto→ctr.
In the manual AF point selection mode, holding down the
button switches to automatic AF point selection. Holding down
the button switches from manual AF point selection to
automatic AF point selection immediately. Convenient when
you are no longer able to focus track a moving subject with a
manually-selected AF point in the AI Servo AF mode.
In the automatic AF point selection mode, holding down the
button selects the center AF point.
4: ONE SHOT ↔ AI SERVO
In the One-Shot AF mode, holding down the button switches
to AI Servo AF mode. In the AI Servo AF mode, holding down
the button switches to One-Shot AF mode. Convenient when
you need to keep switching between One-Shot AF and AI
Servo AF for a subject that keeps moving and stopping.
5: IS start
With the lens' IS switch already ON, the Image Stabilizer
operates only while you hold down the AF stop button.
•
The AF stop button is provided only on super telephoto
lenses.
•
AF mode display on the LCD panel does not change
even if the AF stop button is pressed, when C.Fn-17-4
is set.
Custom Function Settings
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