Canon EOS DIGITAL REBEL XTI Service Manual page 31

7-6 AF point display:
7-7 AF activation:
7-8 AF operation speed:
7-9 Focus confirmation:
7-10 AF precision:
7-11 AF working range:
7-12 AF-assist beam:
Indicated by superimposed display in the viewfinder and on
the LCD monitor.
AF is activated by pressing the shutter button halfway (SW-1)
Same with the EOS 30D (One shot AF)
Indicated by superimposed display in viewfinder, focus
confirmation light, and beeper.
⑴ In both the Basic and Creative Zone modes, when the AI
Focus AF mode is set and the camera switches to AI Servo
AF, the beeper will sound. The beeper will also sound in the
Sports mode.
⑵ In the Creative Zone modes, the beeper will not sound when
AI Servo AF is set.
⑶No focus confirmation indicator in the AI SERVO AF mode.
⑷ The focus confirmation beeper can be enabled or disabled
with the menu's [Beep].
Same as EOS 30D
EV 0.5 - 18 (at 23° C/73° F and ISO 100, under Canon's testing
standards)
Intermittent firing of built-in flash.
⑴ Effective range: Approx. 4 m/13.1 ft at center, approx.
3.5 m/11.5 ft at periphery.
⑵ Conditions for emission: Emitted automatically when
necessary under low light (EV 4 or lower at ISO 100), linked
to all 9 AF points.
→ Not emitted in the Landscape, Sports, and Flash OFF modes.
→ In a Creative Zone mode, emitted automatically when the built-in flash has
been popped up manually.
→Emission can be disabled/enabled with C.Fn-5.
⑶ Emission time (1 burst), frequency, times (stops when the
focus confirmation signal is detected)
Approx. 250 ms or less, approx. 28 Hz, Max. 8 times
⑷With external EOS Speedlite
The external Speedlite's AF-assist beam is used.
→ When a speedlite equipped with an AF-assist beam other than the 580EX,
550EX, 430EX, 420EX, and ST-E2, is used, the AF-assist beam will be
emitted only when AF point selection is automatic or manually selected at
the center. (When a speedlite other than the 580EX, 430EX and 420EX
is used, the AF-assist beam may not be emitted depending on AF point
selection. Also, the subject may not be properly focused even if the beam is
emitted. In that case, focus on the center AF point.)
26
General Information