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Fill-in flash mode overcomes troublesome shadows and
produces a more balanced exposure between subject
and background with contre-jour shots. The camera's
computer-controlled metering system sets the most
suitable combination of shutter speed, aperture and
flash output.
Ensure that the contre-jour light source does not shine
directly into the lens, as this will interfere with the
camera's TTL metering system!
There is no setting or display for automatic fill-in flash in
the flash unit.
5.3 Manual flash exposure correction in TTL flash mode
This function must be set on the camera, see the camera
user manual.
The auto flash exposure mode of most cameras is
adjusted to a reflection factor of 25% (the average
reflection factor of flash subjects).
A dark background that absorbs much of the light or a
highly reflective bright background (backlit shots,
for example) may result in, respectively, underexposure
or overexposure of the subject.
To offset these effects, the flash exposure can be
adjusted manually for the shot with a correction value.
The extent of the correction depends on the contrast
between the subject and background!
Tip:
Dark subject against light background: positive
correction factor.
Light subject against dark background: negative
correction factor.
Exposure correction by means of alteration of the lens
aperture setting is impossible, since the camera's
automatic exposure program regards the altered aper-
ture setting as the normal working aperture setting.
When setting the correction factor, the distance shown
in the display can change and be adjusted to the
correction factor (depending on the camera model)!
After the shot, remember to cancel the TTL flash
exposure correction in the camera!
Strongly reflecting objects in the motif can have a
negative impact on the camera's automatic exposure.
The photograph will be underexposed. Remove
reflecting objects or set a positive correction value.
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