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Manual exposure control m and TTL control-
led variable flash illumination
The exposure of the available light and the influ-
ence of the flash light can be controlled indepen-
dently of one another.
The shutter speed and aperture are adjusted to
the available light manually using the light balance
(2.8). All shutter speeds between 16 s and the
flash sync speed of 1/250 s can be set. The
influence of the available light, and therefore the
brightness of the background, can thus be syste-
matically influenced using over- and underexpo-
sure. The effect of the flash illumination can be
controlled on the SCA adapter or on the flash
unit itself (on SCA 3002 standard units). If the
flash is only to be used as a fill-in, a corresponding
flash exposure compensation is entered (see
also "Setting flash exposure compensation on
the camera in exposure mode m ", p. 163).
Flash operation with the flash's own
automatic mode
When
using
the
3501/3502M3 automatic computer mode, the
quantity of light reflected by the subject is metered
and evaluated by an integrated sensor in the
flash unit rather than by the camera. If the X
position is selected on the camera's shutter
speed dial (1.16), the exposure always uses the
flash sync time of 1/250 s. Otherwise, the expo-
sure modes generally function in the same way
as without flash. The fastest shutter speed is the
flash sync speed of 1/250 s however. If this limi-
tation to the flash sync speed results in overex-
posure, this is shown in the viewfinder by flashing
of the shutter speed display 2 2 5 5 0 0 (2.9 a) in the
automatic exposure modes or, in m, by the light
balance (2.8).
168
flash
unit
and
SCA
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