Canon REBEL T3I EOS 600D User Manual page 80

Z: Changing the ISO SpeedN
ISO [AUTO]
Shooting Mode
A/7/C/3/4/5/6
1
d/s/f/a*
2
With flash
*1: Fixed at ISO 400 for bulb exposures.
*2: Depends on the maximum ISO speed limit set.
*3: If fill flash results in overexposure, ISO 100 or a higher ISO speed will be set.
*4: If bounce flash is used with an external Speedlite in a Basic Zone (except
<6>) mode, <d> or <8> mode, ISO 400 - 1600 (or up to the maximum
limit) will be set automatically.
When [AUTO] is set, the ISO speed is indicated in whole-stop
increments. However, the ISO speed is actually set in finer increments.
Therefore, in the image's shooting information (p.226), you may find an
ISO speed like 125 or 640 displayed as the ISO speed.
In the <2> mode, the ISO speed shown in the table is actually used
even if ISO 100 is not displayed.
3 Setting the Maximum ISO Speed for ISO AutoN
For ISO Auto, you can set the maximum ISO speed limit within ISO 400 - 6400.
80
/8
If the ISO speed is set to [AUTO], the
actual ISO speed to be set will be
displayed when you press the shutter
button halfway. As indicated below, the
ISO speed will be set automatically to
suit the shooting mode.
ISO Speed Setting
Automatically set within ISO 100 - 3200
Automatically set within ISO 100 - 6400
Fixed at ISO 100
Fixed at ISO 400
Under the [y] tab, select [ISO Auto],
then press <0>. Select the ISO speed,
then press <0>.
*3*4
*2