Canon EOS Digital Rebel XTi EF-S 18-55 Kit User Manual - Page 53

Changing the ISO Speed

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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. 1 Press the button. X [ISO speed] will appear. 2 Select the ISO speed. Press the key to select the desired ISO speed, then press the shutter button halfway. ISO Speed Guide ISO Speed 100/200 400/800 1600 Normal (No flash) Sunny outdoors Overcast skies, evening Night or dark indoors Flash Range See page 54 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. 53

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53
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.
1
Press the <
W
Z
> button.
[
ISO speed
] will appear.
2
Select the ISO speed.
Press the <
S
> key to select the
desired ISO speed, then press the
shutter button halfway.
ISO Speed Guide
Z
: Changing the ISO Speed
N
ISO Speed
Normal (No flash)
Flash Range
100/200
Sunny outdoors
See page 54
400/800
Overcast skies, evening
1600
Night or dark indoors
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.