Using Red-Eye Reduction - Canon EOS 50D Instruction Manual

Using the Built-in Flash
Effective Range of Built-in Flash
Aperture
100
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
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
f/5.6 2.3 / 7.5
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).

3 Using Red-eye Reduction

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>.
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.
108
200 400
3.3 / 10.8 4.6 / 15.1 6.6 / 21.7
ISO Speed
800 1600
9.3 / 30.5 13.1 / 43.0 18.6 / 61.0
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.
[Approx. meters/feet]
3200 H1: 6400 H2: 12800
42.0 / 137.8
36.8 / 120.7
26.3 / 86.3