145
k
7 Flash modes
Depending on the camera model, the following
flash modes are available:
• Automatic flash mode ( ), chap. 7.1
• Preflash TTL( ), chap. 7.2
• Manual flash mode ( ), chap. 7.3
• Automatic high-speed synchronisation (HSS),
chap. 7.4
• mode settings
,
chap
. 10.1
• flash mode, chap. 10.2
•
mode,
chap
. 10.4.
A data transfer between flash unit and camera is
necessary before setting flash mode
and e.g. by actuating the shutter
release.
7.1 AUTO Flash Mode
With the AUTO flash mode, the flash unit can be
used easily for flash photography. It is not necessa-
ry to select particular settings on the flash unit.
The AUTO flash mode is a simplified flash mode for
digital cameras without settings choices and/or the
camera mode “P mode" and the fully automatic
mode.
AUTO
TTL
M
MASTER
SLAVE
SERVO
HSS
TTL
HSS
M
7.2 Preflash TTL and ADI metering
Preflash TTL and ADI metering are digital TTL flash
operating modes and refined versions of the TTL
flash operation found in analogue cameras. When
taking a shot, an almost imperceptible measure-
ment preflash is triggered by the camera prior to the
actual exposure process. The reflected light of the
measurement preflash is evaluated by the camera.
Depending on the result of the evaluation, the sub-
sequent flash exposure is adapted by the camera to
suit the given shot situation (see camera operating
instructions for further details). In the case of ADI
metering, additional distance data from the lens is
incorporated into the flash exposure process. The
selection and/or setting of the preflash TTL and ADI
metering operating modes are carried out on the
camera (see camera operating instructions).
The flash unit must be set to the or
flash operating mode.
TTL
AUTO
