The value of the bar in the flash ratio scale below is indicated in 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.

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