▪ TTL Mode –
The TTL setting allows you to use the full power of
i-TTL technology. By leaving Mode set to TTL (as
shown in Figure 12-11) on the Built-in flash or Group A
or B, you derive maximum flexibility and accuracy from
all your flash units. In this mode, the Comp. setting will
display exposure values from -3.0 EV to + 3.0 EV, a
full6-stop range of exposure compensation for each
group of Speedlights. You can set the Comp. in 1/3 EV
steps for very fine control.
▪ AA Mode – I am only briefly touching on the AA mode,
since it is an older noni-TTL technology included for
those accustomed to using the older technology. With
the SB-900 or SB-800, it is used primarily by cameras
not compatible with the Creative Lighting System. It is
not available for the built-in Speedlight on the D300(S),
or for the SB-600. You can safely ignore the AA mode,
unless you want to experiment with it. It may not
provide as accurate a flash exposure as TTL mode
though, since it is not based on the amazing i-TTL
technology. Otherwise, it works pretty much the same as
TTL mode.
▪ M Mode – This allows you to set different levels of
flash output in 1/3 E V steps for the Built-in flash or the
Speedlights in Group A or B. The settings you can put in
the Comp. field are between 1/1 (full) and 1/128. The
intermediate 1/3-stop settings are presented as decimals
within the fractions. For example, 1/1.3 and 1/1.7 are 1/3
and 2/3 stops below 1/1 (full). Many people are used to
working with flash units this way, so it seems more
767
To Next Page
Loading...
