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TECHNICAL GLOSSARY
Flash readiness indication
The flash readiness indication
illuminates when there is enough
energy in the flash capacitor of the flash unit.
G
Guide number (GN)
The guide number is the code
number for the light output of a
flash unit. It is dependent on the set light sen-
sitivity ISO and (for zoom reflectors) on the
reflector position, as well as on any reflector
attachments that may be in use (e.g. wide-
angle or telephoto lens cover). For high speed
synchronization (HSS), the guide number is
dependent on the shutter speed as well.
H
HSS – high speed synchronization
In high speed synchronization
(HSS), you can flash with expo-
sure times that are shorter than the flash
sync time of the camera. As a result, flash
photos with wide aperture openings are
possible for high ambient light levels, for
example to limit the depth of field in portrait
shots.
I
i-TTL
Modern further development of
the TTL flash control with measure-
ment pre-flash technique for Nikon and
Fujifilm cameras.
i-TTL-BL
For the i-TTL BL flash control, ad-
ditional data such as the dis-
tance to the subject, for example, is taken
into consideration in the flash exposure.
K
Key function
Locking of the operating ele-
ments. Protects against uninten-
tional changes.
L
LCD / LED display
Provides information on the flash
modes and settings being used.
(>>> Dot matrix display)
A
ADI
Modern further development of
the TTL flash control for Sony
Alpha and Konica-Minolta cameras in
which, for example, the data for distance
to the subject must be put into the flash
exposure in addition.
AF measurement flash
An autofocus auxiliary light
(AF measurement flash) integrated
in the flash unit automatically supports
the central autofocus sensor of the camera
in the event of low ambient light. For a
multi-zone AF measurement flash, the
decentralized AF sensors are supported in
the process.
Automatic unit switch-off
During extended breaks from
photographing, the flash unit
is switched automatically to an energy-
saving standby state to prevent the power
source from discharging (Auto-Off).
Through the wake-up function, the flash
unit is reactivated, for example when the
shutter release is actuated.
Automatic flash mode
A photo sensor integrated in the
flash unit measures the subject
during photographing, and automatically
terminates the light output as soon as the
subject is correctly exposed.
B
Buzzer
Additional acoustic status mes-
sages can be activated for flash
readiness, flash exposure control as well
as warning tones.
C
Correct exposure indication
The correct exposure indication
OK is shown on the flash unit after
the photograph if the subject in automatic or
TTL flash mode was correctly exposed.
D
D-TTL
Modern further development
of the TTL flash control with
measurement pre-flash technique for Nikon
and Fujifilm cameras.
3D and D-TTL-3D
For the 3D-TTL (Nikon) and
D-TTL-3D flash control, additional
data such as the distance to the subject,
for example, is taken into consideration in
the flash exposure.
Dot matrix display with soft keys
Individual adaptation of the
display on the camera system
and the operating state for optimum and
self-explanatory operation of the flash unit
via soft keys.
E
E-TTL
Modern further development
of the TTL flash control with
measurement pre-flash technique for
Canon EOS and PowerShot cameras.
E-TTL II
For E-TTL-II, additional data is
taken into consideration during
flash exposure such as the distance to the
subject and the guide number of the flash
unit, for example.
Extended zoom
With Motor Zoom mode, the main
reflector illuminates the subject
more than necessary by one reflector position.
As a result, the additional dispersed light
provides softer illumination of the subject.
F
Flash bracketing
Flash bracketing series with
three photos of different flash ex-
posure: minus correction value, no correc-
tion value, and plus correction value.
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