Fully Automatic Flash Operation.11 - Canon Speedlite 540EZ Manual

III. Basic Flash Operation
After attaching the 540EZ, set your EOS camera to Program AE or Full
Auto mode. The camera and flash unit automatically operate in A-TTL
program automatic flash mode and the camera automatically sets the
appropriate synchronous shutter speed and aperture value. Just like in
Full Auto mode, this setting makes flash photography easy for anyone in
any situation, from low-light indoor scenes to backlit subjects in daylight.
1. Fully-Automatic Flash Operation
"| Set the camera's shooting
mode to Program AE (P).
O Turn on the power to the
Speedlite 540EZ.
3 Press the 540EZ's flash mode
button so that the A-TTL auto¬
matic flash mode indicator
(A-
TTL)
appears in the flash
unit's LCD panel.
O
If the flash has been fired 20 times continuously, allow the Speedlite to rest for 15
minutes to prevent the flash head from overheating. Overheating can cause the
flash head to breakdown.
4
Cover the subject with the
H viewfinder's AF frame and
press the shutter button
halfway.
D 0 I D
)
D D
■
• When the shutter button is
{■ pressed halfway, the camera
focuses the subject and the
j^B 540EZ fires a pre-flash to deter-
mine the optimum aperture value.
• The camera automatically sets a
flash-synchronizing shutter speed
of 1/60 ~ 1/250 sec. (the X-sync
speed of the camera). The fastest
flash-synchronizing shutter speed
differs depending on the camera
model.
5 After checking that the
i
indicator in the viewfinder
lights and the aperture and
shutter speed values do not
blink, take the picture.
If flash is used in Depth-of-Field AE
(DEP)
mode, the camera takes a
flash picture in the same way as in
Program AE mode.
If the flash exposure is correct,
the flash exposure confirmation
lamp lights for approx. 2 seconds.
If the flash exposure confirmation
lamp does not light, there is a
possibility that the picture was
underexposed. In this case, wait
for the ready lamp to light red,
then take the picture again from a
position closer to the subject.