Canon EOS 50D - Manual (Page 108)

108
Using the Built-in Flash
Effective Range of Built-in Flash [Approx. meters/feet]
Using the red-eye reduction lamp before taking a flash picture can
reduce red eye. Red-eye reduction will work in any shooting mode
except <3> <7> <5>.
Under the [1] tab, select [Red-eye
On/Off], then press <0>. Select
[On], then press <0>.
For flash photography, when you
press the shutter button halfway, the
red-eye reduction lamp will light. Then
when you press the shutter button
completely, the picture will be taken.
Aperture
ISO Speed
100 200 400 800 1600 3200 H1: 6400 H2: 12800
f/3.5 3.7 / 12.1 5.3 / 17.4 7.4 / 24.3 10.5 / 34.4 14.9 / 48.9 21.0 / 68.9 29.7 / 97.4 42.0 / 137.8
f/4 3.3 / 10.8 4.6 / 15.1 6.5 / 21.3 9.2 / 30.2 13.0 / 42.7 18.4 / 60.4 26.0 / 85.3 36.8 / 120.7
f/5.6 2.3 / 7.5 3.3 / 10.8 4.6 / 15.1 6.6 / 21.7 9.3 / 30.5 13.1 / 43.0 18.6 / 61.0 26.3 / 86.3
3 Using Red-eye Reduction
For close subjects, the subject should be at least 1 meter/3.3 feet away
when using flash.
Detach the lens hood and keep at least 1 meter/3.3 feet away from the subject.
If the lens has a hood attached or you are too close to the subject, the
bottom of the picture might look dark due to the obstructed flash. If you
use a telephoto lens or a fast lens and the flash is still partially
obstructed, use an EX-series Speedlite (sold separately).
The red-eye reduction feature is most effective when the subject looks at
the red-eye reduction lamp, when the room is well lit, or when you go
closer to the subject.
When you press the shutter button halfway, the viewfinder
display on the bottom will gradually turn off. For best
results, take the picture after this display turns off.
The effectiveness of red-eye reduction varies depending on the subject.
COP
Y