Canon 540EZ - Manual (Page 29)

3. Shutter-priority AE
Shutter-priority AE mode is useful for flash pictures of moving subjects
where different shutter speeds can provide different effects. After manual­
ly selecting the desired shutter speed (between 30 sec. and the camera’s
X-sync speed), the camera automatically sets the aperture value neces­
sary to achieve proper background exposure. When the picture is taken,
the flash exposure is automatically controlled according to the TTL pro­
gram based on the automatically-set aperture value.
■) Set the camera's shooting mode to shutter-priority AE mode (Tv),
then set a desired shutter speed between 30 sec. and the camera’s
X-sync speed.
Make sure the flash is set to
TTL mode, then cover the
subject with the viewfinder’s
AF frame and press the shut­
ter button halfway to focus the
subject.
Confirm that the distance from
the camera to the subject is
within the flash coupling dis­
tance range displayed in the
LCD panel, make sure the
viewfinder’s aperture value
display is not blinking and that
the flash charge indicator i
is lit, then take the picture.
I
If the aperture value blinks in the viewfinder, the background will be either over­
exposed or underexposed. If this occurs, change the shutter speed until the blink­
ing stops.