3
Custom Function Settings
N
142
C.Fn-04
Shutter button/AE lock button
0: AF/AE lock
1: AE lock/AF
Convenient when you want to focus and meter separately. Press the <
A
>
button to autofocus and press the shutter button halfway to attain AE lock.
2: AF/AF lock, no AE lock
In the AI Servo AF mode, you can press the <
A
> button to stop
the AF operation momentarily. This prevents the AF from being
thrown off by any obstacle passing between the camera and
subject. The exposure is set at the moment the picture is taken.
3: AE/AF, no AE lock
This is useful for subjects which keep moving and stopping
repeatedly. In the AI Servo AF mode, you can press the <
A
> button
to start or stop the AI Servo AF operation. The exposure is set at the
moment the picture is taken. Thus, the focusing and exposure will
always be at the optimum point as you wait for the decisive moment.
C.Fn-05
AF-assist beam
You can set the AF-assist beam to be emitted from the camera or EOS-dedicated Speedlite.
0: Emits
1: Does not emit
AF-assist beam not emitted.
2: Only ext. flash emits
When an EOS-dedicated Speedlite is used, the AF-assist beam is emitted only
when necessary. When the built-in flash is used, the AF-assist beam is not emitted.
C.Fn-06
Exposure level increments
0: 1/3-stop
1: 1/2-stop
Sets 1/2-stop increments for the shutter speed, aperture, exposure
compensation, AEB, etc.
C.Fn-04 and C.Fn-17-0, 1, 2 (p.146) both have AF start/stop and AE lock
functions. If you have set both these Custom Functions and you execute
both Custom Function operations, the latter operation will not work. The only
exception will be when AF stop is executed after AF start.
143
3
Custom Function Settings
N
C.Fn-07
Flash firing
You can enable the built-in flash, external Speedlite, and non-Canon
flash connected to the PC terminal to fire.
0: Fires
1: Does not fire
The flash will not fire.
C.Fn-08
ISO expansion
0: Off
1: On
For the ISO speed, “
H
” (equivalent to ISO 3200) will be selectable.
C.Fn-09
Bracket sequence / Auto cancel
You can change the AEB sequence when the pictures are bracketed with the shutter
speed or aperture and the file-saving sequence for white balance bracketing (WB-BKT).
When “Auto cancellation” is set, bracketing will be canceled in the following cases:
AEB: You turn the <
4
> switch to <
2
>, change lenses, have flash-
ready, replace the battery, or replace the CF card.
WB-BKT: You turn the <
4
> switch to <
2
>, replace the battery, or
replace the CF card.
0: 0, -, +/Enable
1: 0, -, +/Disable
The first bracketed shot is the standard exposure (or exposed with the
standard white balance). This bracketing sequence can be repeated.
2: -, 0, +/Enable
Starts the bracketing sequence with the minus (bluish or magenta bias) setting.
3: -, 0, +/Disable
Repeats the bracketing sequence starting with the minus (or bluish
or magenta bias) setting. This bracketing sequence can be repeated.
AEB
WB bracketing
B/A Bias
M/G Bias
0 : Standard exposure
0 : Standard white balance
0 : Standard white balance
- : Decreased exposure - : More blue
- : More magenta
+ : Increased ex : More amber
+ : More green
Содержание EOS 20D Digital
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