Using Ttl Ratio Adjustment Modes - Vello Freewave Aviator User Manual

USING TTL RATIO ADJUSTMENT MODES

Ratio Adjustment Mode gives you the
convenience of not having to make
individual adjustments to each flash group.
You can make simple adjustments to the
relationship between Group A and B,
or Groups A, B and C (with Group C
adjusting itself in relation to Group B),
using a FreeWave Aviator Transceiver.
A standard portrait lighting setup uses a
main (or key) light set at 100% power, a fill
light at 50%, and a background light set as
needed. In the device's Ratio Mode, you
only need to adjust your ratio settings.
The others will self-adjust and maintain
their relative settings automatically.
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For example, in Ratio A:B Mode, when
setting the ratio as 2/1 (or 2:1), Group A
will be twice as powerful as Group B.
In Ratio A:BC Mode, the device allows
adjustments to the power of Group C
in relation to Group B. Adjustments to
Group C are set in EV. Each EV stop higher
or lower will be either twice or half the
power of the previous stop respectively
(setting the EV to −1 would mean that
Group C is 1 stop less powerful – or half
the power of Group B). The EV can be
adjusted in increments of 1/3 of a stop.
For example, in Ratio A:BC mode, if B is
set to be half (−1 stop) of A, and C is set to
an EV of −1 (1 stop less than B), C would
actually be 1/4 (−2 stops) the power of A.
(Background Light)
Subject
Group B
(Fill Light)
Camera
Typical portrait lighting arrangement
Group C
Group A
(Key Light)