Canon EOS REBEL T2i 用户手册
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: Changing the Depth of Field
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To obtain a correct flash exposure, the flash output will be set
automatically to match the set aperture (autoflash exposure). The
shutter speed will be set automatically between 1/200 sec. - 30 sec. to
suit the scene’s brightness.
In low light, the main subject is exposed with the automatic flash, and
the background is exposed with a slow shutter speed set automatically.
Both the subject and background look properly exposed (automatic
slow-speed flash sync). If you are handholding the camera, keep it
steady to prevent camera shake. Using a tripod is recommended.
If you do not want a slow shutter speed to be used, set the [7 Custom
Functions (C.Fn)] menu’s [Flash sync. speed in Av mode] to [1: 1/
200-1/60 sec. auto] or [2: 1/200 sec. (fixed)] (p.192).
automatically to match the set aperture (autoflash exposure). The
shutter speed will be set automatically between 1/200 sec. - 30 sec. to
suit the scene’s brightness.
In low light, the main subject is exposed with the automatic flash, and
the background is exposed with a slow shutter speed set automatically.
Both the subject and background look properly exposed (automatic
slow-speed flash sync). If you are handholding the camera, keep it
steady to prevent camera shake. Using a tripod is recommended.
If you do not want a slow shutter speed to be used, set the [7 Custom
Functions (C.Fn)] menu’s [Flash sync. speed in Av mode] to [1: 1/
200-1/60 sec. auto] or [2: 1/200 sec. (fixed)] (p.192).
Press the depth-of-field preview button
to stop down to the lens’s current
aperture setting. You can then check the
depth of field (range of acceptable focus)
through the viewfinder.
to stop down to the lens’s current
aperture setting. You can then check the
depth of field (range of acceptable focus)
through the viewfinder.
Using the Built-in Flash
Depth of Field PreviewN
The depth-of-field effect can be clearly seen on the Live View image as you
change the aperture and press the depth-of-field preview button (p.112).
change the aperture and press the depth-of-field preview button (p.112).
COP
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