User Manual
5
Fill-in ash
Instead of a primary light source, ash is often
used to supplement ambient light. One of
the most common uses of this approach is
brightening the harsh shadows created by
intense sunshine. Known as ‘ll-in ash’,
this technique is completely automated
by Canon’s E-TTL II ash metering. Flash
exposure compensation can be used to vary a
Speedlite’s brightness, thereby adjusting the
balance of ambient light to ash.
High-speed sync (FP)
When attempting ll-in ash, bright daylight
conditions can sometimes necessitate the
use of a shutter speed that is faster than the
camera’s maximum ash synchronisation
speed – i.e. the shortest shutter speed where
the shutter opens fully during the exposure.
With conventional ash this is problematic,
leading to dark bands across the frame, but
with Canon Speedlites and EOS cameras,
high-speed sync (FP) technology allows any
shutter speed to be used with ash, right up
to 1/8000sec.
Camera: Canon EOS 70D
Tv (Shutter Speed): 1/125 sec
Av (Aperture Value): f/16.0
ISO Speed: 100
Lens: EF 24-70mm f/2.8L USM
Focal length: 63.0 mm
Flash: Speedlite 600EX-RT