Canon 14EX - MR - Ring-type Flash Instruction Manual page 24

The value of the
parentheses.
(5.6:1) (2.8:1) (1.4:1) (1:1.4) (1:2.8) (1:5.6)
In terms of aperture stops, the flash ratio range is equivalent to 3:1 - 1:1 -
1:3.
If the picture is taken while <y> is not displayed, flash tubes/heads
A and B will fire at the same output.
Flash ratio control is not possible with the following cameras. You can fire
both flash tubes/heads at the same output or fire only one of the flash
tubes/heads.
EOS ELAN ll/ELAN ll E/50/50E, EOS REBEL G/500N, EOS IX, EOS IX
Lite/IX7, EOS 3000/88, EOS REBEL 2000/300, EOS REBEL XS N/
REBEL G II/3000N/66
Modeling Flash
If the camera has a depth-of-field preview button, pressing it will fire the
flash continuously for 1 sec. This is called the modeling flash. It enables
you to see the shadow effects on the subject and the lighting balance.
The modeling flash also works with a wireless, multi-Speedlite system.
22
bar in the flash ratio scale below is indicated in