Changing The Iso Speed - Canon EOS 400D Digital Instruction Manual

Z: Changing the ISO SpeedN
Set the ISO speed (imaging sensor's sensitivity to light) to suit the
ambient light level. For example, when you increase the ISO speed
(higher number) for low light, a faster shutter speed can be used and
camera shake will be less prone to occur. The effective range of the
flash will also increase.
ISO Speed Guide
ISO Speed
100/200
400/800
1600
Using a high ISO speed or shooting in high-temperature conditions may
result in slightly grainy images.
High temperatures, high ISO speeds, or long exposures may cause
irregular colors in the image.
In the Basic Zone modes, the ISO speed will be set automatically within
ISO 100 - 400 to match the respective light level.
With ISO 800 or 1600, camera shake is less prone to occur than with the
Basic Zone modes. The flash range will also be longer.
Press the <WZ> button.
1
Select the ISO speed.
2
Normal (No flash)
Sunny outdoors
Overcast skies, evening
Night or dark indoors
[ISO speed] will appear.
Press the <S> key to select the
desired ISO speed, then press the
shutter button halfway.
Flash Range
See page 54
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