Canon EOS 50D 用户手册

107

E-TTL II autoflash obtains high-precision and consistent flash shots.

If necessary, the built-in flash will pop-up automatically in low-light 
or backlit conditions. (except in <3> <5> <7> modes)

Regardless of the light level, you can press the <D> button to pop-up 
and fire the built-in flash whenever desired. If the built-in flash has 
popped up, you can push it back down with your fingers.
d

: For fully automatic flash photography. The shutter speed (1/ 

250 sec. - 1/60 sec.) and aperture are set automatically.

s

: Enables you to set the desired shutter speed (1/ 250 sec. - 

30 sec.). The flash exposure will be set automatically to match 
the aperture that was set automatically.

f

: Enables you to set the desired aperture. The flash exposure 

will be set automatically to match the aperture that was set. The 
shutter speed will be set automatically between 1/250 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).

 

With slow shutter speeds, using a tripod is recommended.

 

If you do not want a slow shutter speed to be used, set 
[8C.Fn I -7: Flash sync. speed in Av mode] to [1: 1/250-1/
60sec. auto] or [2: 1/250sec. (fixed)] (p.175).

a

: You can set both the shutter speed (1/250 sec. - 30 sec., 

bulb) and aperture. The flash exposure will be set 
automatically to match the aperture that was set. The 
background exposure will vary depending on the shutter speed 
and aperture.

8 : The flash result will be the same as the <d> mode.

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