Canon EOS 20D Instruction Manual

92

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 

d

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

60 sec. - 1/250 sec.) and aperture value are set automatically, 
just as in <

1> (Full Auto) mode.

s

: For when you want to set the shutter speed (30 sec.  - 1/250 

sec.). The camera then automatically sets the flash aperture 
value to provide the proper exposure for your shutter speed.

f

: For when you want to set the aperture value. The camera 

then automatically sets the shutter speed (30 sec. - 1/250 
sec.) to provide the proper exposure for your aperture. Against 
dark backgrounds such as the night sky, slow-sync shooting will 
be set so that both the subject and background are exposed 
correctly. The main subject is exposed with the flash, and the 
background is exposured with a slow shutter speed.

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Because automatic slow-sync shooting uses a slow shutter 
speed, always use a tripod.

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If you do not want a slow shutter speed to be set, set C.Fn-03 
[Flash sync speed in Av mode] to [1: 1/250sec. (fixed)].  
(p.141)

a

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

sec.) and aperture value. The main subject is exposed 
properly by the flash. The background exposure varies 
depending on the shutter speed and aperture.

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