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10. Correct exposure indication
The correct exposure indicator "o.k." only lights up if the
picture was correctly exposed in automatic or TTL flash
mode.
This gives the user the opportunity to fire a test flash
while in automatic flash mode so that the correct apertu-
re can be established beforehand. This is particularly
valuable with bounce flash when reflection conditions
are difficult to judge. A test flash cannot be fired in TTL
mode.
The test flash can be triggered with the manual firing
button provided that this button has not been program-
med for „Modelling Light" (see Chapter 12).
If the ok exposure indicator remains dark after the test
flash was fired, then adjust the next lower f-number, or
diminish the distance to the reflecting surface or subject,
and repeat the test flash.
The f-stop established in this manner must also be set
on the camera.
To trigger a test flash, hold the camera and flash
unit in the same manner as for the actual shot!
This facility can also be used with TTL mode without
having to produce test exposures. The flash unit is adju-
sted to automatic mode, and the correct aperture is then
determined with a test flash in the previously described
manner. The established aperture is transferred to the
camera and the flash unit is then readjusted to TTL
mode.
This procedure is relatively accurate with lenses of
medium focal length of between 28 mm and 85 mm.
However, in borderline cases, underexposure may result
in TTL mode. In such an event the ok exposure indicator
will remain dark after the shutter has been released. Sel-
ect the next larger aperture (e.g. f/8 instead of f/11) and
have another try.
11. AF measuring beam
The AF measuring beam can only be activated
by autofocus cameras that support the AF mea-
suring beam of the flash unit! Some autofocus
cameras only support their own built-in AF illu-
minator (refer to the operating instructions for
the given camera). The mecablitz must be fitted
with an SCA 3xx2 adapter!
Please note when selecting the camera's autofocus
mode that most cameras only support the AF measuring
beam in the „Single AF" or „One-Shot AF" mode (see
60
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