E-Ttl Ratio Modes - Vello FWIRC-C FREEWAVE User Manual

E-TTL RATIO MODES

The FWIRC-C Commander offers
two E-TTL ratio modes, E-TTL
(A:B) and E-TTL (A:B+C).
E-TTL (A:B)
Power output is set at a ratio for groups
A and B. For example, if the ratio is set
at 2:1, group A will fire at twice the
power of group B. In this mode, there is
one global EV setting for both groups.
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E-TTL A:B+C Ratio Mode
E-TTL A:B Ratio Mode
E-TTL (A:B+C)
Power output is set at a ratio for groups
A and B, and group C is set in EV and is a
ratio of group B. For example, if group C
is set at EV -1, it will fire at one stop less,
or half the power of group B. With the
A:B ratio set at 2:1, group A will fire at
twice the power of group B, and group C
will fire at half the power of group B, i.e.,
one quarter of the power of group A.