Canon Speedlite 540EZ Manual page 14

4 Confirm that the distance from
the camera to the subject is
within the flash coupling dis¬
tance range displayed in the
LCD panel.
5 Make sure that the flash
charge indicator is lit, then
take the picture.
• If the shooting distance is less than
the minimum distances shown
below, the indicator at the left of
the flash unit's coupling range dis¬
play blinks.
Flash coverage angle
Shooting distance
18 - 28mm
0.5m /1,7ft or less
35mm or greater
0.7m / 12.3ft or less
14
2. Aperture-priority AE
Use aperture-priority AE mode when using flash for pictures where you
need control over depth of field, or when you want to achieve proper
exposure of both the subject and background. After manually selecting
the desired aperture value, the camera automatically sets the shutter
speed necessary to achieve proper background exposure. When the pic¬
ture is taken, the flash exposure is automatically controlled according to
the TTL program based on the manually-set aperture value.
"j
Set the camera's shooting
mode to aperture-priority AE
mode (Av), then set the
desired aperture value.
2
Make sure the TTL indicator is
displayed in the flash unit's
LCD panel.
3
Focus the subject.
4 Confirm that the distance from
the camera to the subject is
within the flash coupling dis¬
tance range displayed in the
LCD panel.