Canon 500D Manuel D’Utilisation

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Set the ISO speed (image sensor’s sensitivity to light) to suit the ambient light 
level. In the Basic Zone modes, the ISO speed is set automatically (p.61).
1
Press the <Z> button. 
(
9
)
X
[ISO speed] will appear.
2
Select the ISO speed.
 
Turn the <6> dial or press the 
<U> key to select the ISO speed.
 
You can also set the ISO speed in the 
viewfinder while turning the <6> dial.
 
With “AUTO” selected, the ISO speed 
will be set automatically (p.61).
ISO Speed Guide
Z
: Changing the ISO SpeedN
ISO Speed
Shooting Situation
(No flash)
Flash Range
100 - 200
Sunny outdoors
The higher the ISO speed, 
the farther the flash range 
will be (p.62).
400 - 800
Overcast skies, evening
1600 - 6400, H
Dark indoors or night
 
Under the [7 Custom Functions (C.Fn)] menu, if [Highlight tone 
priority
] is set to [1: Enable], the settable ISO speed range will be ISO 
200 - 3200 (p.186).
 
Using a high ISO speed or shooting in high-temperature conditions may 
result in more grainy images. Long exposures can also cause irregular 
colors in the image.
 
When you shoot at high ISO speeds, noise (horizontal banding, light 
dots, etc.) may appear.
Under the [7 Custom Functions (C.Fn)] menu, if [ISO expansion] is set 
to [1: On], ISO 6400 and “H” (ISO 12800) can also be set (p.184).