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III. DISCUSSION 17
C. F
n. 5 controls the AF-assist beam. The three choices are ON, OFF and fire only the
e
xternal flash.
C. F
n. 6 controls whether manually-adjusted exposure level increments are in 1/2 or 1/3
s
top units.
C. F
n. 7 enables the mirror lockup function. When C. Fn. 7-1 i selected, the mirror locks
up when the shutt
er button is pressed completely. The shot is taken when the shutter
b
utton is released and then pressed completely again. The maximum mirror lockup
duration is 30 seconds, after which the mirror returns.
C. Fn. 8 controls whether the E-TTL II autoflash system operates in its evaluative mode or
its averaging mode.
Finally, C. Fn. 9 determines whether the built-in flash or an accessory Canon EX-series
Speedlite is synchronized to fire after the first shutter curtain completes its travel or just
before the second shutter curtain begins to move.
Menus
The Digital Rebel XT camera has ten new menu items compared to the EOS Digital
Rebel camera, so a fifth menu column has been added to accommodate this new
abundance of choices. Menus one and two are for image recording functions and are
color-coded red. In menu one, the user chooses recording quality, red-eye reduction,
warning beep, AF mode, metering mode and ISO speed. In the Creative Zone modes,
menu two is displayed. It contains auto exposure bracketing, flash exposure
compensation, white balance, white balance shift/bracket, custom white balance,
color space and parameters.
Menu three is color-coded blue and has 5 playback items: image protect, image rotate,
print order, auto play and review time control.
Menus four and five are for camera setup functions. They
are colorcoded yellow, with 7 items in each. Setup one has
auto power off timecontrol, auto rotate, LCD brightness
setting in 5 levels, date/time, file numbering, format and
shoot
without card. Setup two has a choice of 15 different
menu languages, a choice of video systems for playback
through a connected TV monitor, data communication
preferences (Normal or PTP), custom functions, a clear
settings command, a sensor cleaning setting tha locks up the mirror and opens the
shutter, and a firmware version readout. For quicker access to key camera settings,
the EOS Digital Rebel XT also features a new "Quick Menu" function. When the camera
is set for picture taking, the cross keys on the back provide instant access to AF
mode, metering mode, white balance settings, and ISO speed. All in all, the menu
settings enable Digital Rebel XT users to modify the camera’s performance according
to their diverse applications and needs.