User Manual

4
E-TTL metering
The moment you mount a Speedlite in the
hotshoe of an EOS camera, Canon’s E-TTL
II ash metering takes control. Accurate
exposures are made automatically and
consistently, even in the most difcult of
lighting situations.
As the shutter release is depressed the
Speedlite emits a pre-ash of light which is
metered through the lens of the camera.
An ambient light reading is also made and
distance information from the camera’s
autofocus system added to the equation in
order to produce the most accurate exposure
possible. Precisely the right amount of light
for the conditions is emitted by the ashgun –
and all in the blink of an eye.
Bounce ash
Bouncing ash off a surface such as a wall or
ceiling softens harsh shadows, resulting in
a more attering light than can be obtained
with direct ash. The apparent size of the light
source is made larger – and the larger the light
source, the softer the quality of the light.
Furthermore, red eye, caused by the direct
reection of light from the retinas at the back
of a subject’s eyes, is virtually eliminated.
Speedlites make bounce ash photography
easy. A bounce and swivel head enables ash
to be directed at any surface and E-TTL II ash
metering still operates as it does for direct
ash, calculating accurate exposures. A small
catchlight panel, available on some Speedlites,
can be used to reect a tiny amount of light
directly towards a subject – just enough to put
that all-important catchlight in the eyes, giving
portraits more depth.
Flash and daylight
Flash photography doesn’t just happen when
the sun goes down. Using Speedlites in the
daylight hours is a great way of reducing
unwanted shadows and enhancing detail,
for a dramatic result.
When using ash as the main light source,
the brightness of the ambient light in the
background can be decreased using the
camera’s exposure compensation controls.
In manual, Av or Tv exposure modes and
your EOS will meter for daylight as well as
making an E-TTL II ash exposure.
Flash photography
techniques
Speedlite 600EX-RT
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Speedlite 600EX-RT
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Speedlite 600EX-RT
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