Canon EOS REBEL T2i 用户手册

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页码 260
62
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.63).
1
Press the <Z> button. 
(9)
X
[ISO speed] will appear.
2
Set 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.63).
ISO Speed Guide
Z
: Changing the ISO SpeedN
ISO Speed
Shooting Situation
(No flash)
Flash Range
100 - 400
Sunny outdoors
The higher the ISO 
speed, the farther the 
flash range will be (p.64).
400 - 1600
Overcast skies or evening time
1600 - 6400, H
Dark indoors or night
 
In the [7 Custom Functions (C.Fn)] menu, if [Highlight tone priority
is set to [1: Enable], ISO 100 and “H” (equivalent to ISO 12800)  settings 
cannot be set (p.194).
 
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 (banding, dots of light, etc.) 
may appear.
In the [7 Custom Functions (C.Fn)] menu, if [ISO expansion] is set to [1: 
On
], “H” (equivalent to ISO 12800) can also be set (p.192).
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