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8 Automatic AF auxiliary light
With system cameras, the AF auxiliary light is possible
only if the camera supports it..
The automatic AF auxiliary light
is activated in the
flash unit by the camera when the ambient lighting
conditions become inadequate for automatic focusing.
The white video LED is activated and the subject on
which the camera can focus is illuminated. The range is
approx. 6- 9 m (with a standard 1.7/50 mm lens).
Parallax error between lens and the AF auxiliary light
limits the close-up range with the AF auxiliary light
to
approx. 0.7 m to 1 m.
If the AF auxiliary light
is to be activated by the
camera, the “Single AF (S)” or “ONE SHOT” autofocus
mode of operation must be set on the camera and
the flash unit must indicate flash readiness. Some
camera models support only the camera’s internal AF
measuring beam.
In this case, the automatic AF auxiliary light
of the
flash unit is not activated
(as in the case of compact cameras; see the camera’s
operating instructions)!
Low-speed zoom lenses can significantly curtail the
range of the AF auxiliary light
!
Some cameras support the AF auxiliary light
in the
flash unit only with the camera’s central AF sensor.
9 Triggering control (auto-flash)
On some cameras, the flash will not be fired when the
prevailing light is sufficient for an exposure. When the
camera shutter release is depressed, no flash exposure
is triggered.
In various cameras, the triggering control only works
in the full program mode or “P” program or must be
activated on the camera (see camera operating
instructions).
