About "Auto" For Automatic Iso Speed - Canon EOS 550D Instruction Manual

IS0: Changing the ISO Speed*
About ,,AUTO,, for Automatic ISO Speed
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.
[Fixed at ISO 400 *2*3
"1 : Depending on the maximum ISO speed that has been set.
*2: If fill flash results in overexposure, ISO 100 or a higher ISO will be set.
*3: In the <P/A-DEP> modes and Basic Zone modes <except _>, ISO 400 -
1600 will be set automatically if bounce flash is used with an extemaW
Speedlite. if the maximum ISO speed has been set to [400] or [80% the ]SO
speed wili be set within this range.
when !'AUTO'! is Set, the JSO Speed Will be displayed in whoJe4stop
increments of 100,200, 400, 800, 1600, or 3200. However, the actua! ISO
speed may be set more precisely. Therefore, in the imagels shooting
Setting the Ma×imum ISO Speed for Auto mSO
For Auto ISO, you can set the maximum ISO speed within ISO 400 -
6400.
Under the [t_] tab, select [ISO Auto],
then press <_>. Select the ISO speed,
then press <_>.
63