44/ Selecting the firing moment / Attaching the flash unit / Settings for camera-controlled automatic flash mode / TTL flash mode /High Speed Synchronization
Selecting the firing moment
The LEICA S2 allows you to choose between the conventional
flash firing moment at the beginning of the exposure and syn-
chronization with the end of the exposure, i.e. immediately
before the 2
nd
shutter curtain begins to close the image apertu-
re again.
The function is available with all flash units, including non-
system compatible units, regardless of whether they are mounted
in the flash shoe or connected by a cord, and with all camera
and flash unit settings. The displays are identical in both cases.
Setting the function
1. In the CAMERA section of the menu (see p. 13/22), select
Flash Synch Mode (5.7), and
2. select your preferred option in the submenu.
Attaching the flash unit
When attaching a flash unit to the LEICA S2 flash shoe (1.20),
you should ensure that the foot of the flash unit is fully inserted
and the clamping nut (if fitted) is tightened to prevent it acci-
dentally falling out. This is particularly important for flash units
with additional control and signal contacts, because any change
to its position in the flash shoe can break the necessary contacts,
leading to malfunctions.
Note:
Before attaching the flash, the camera and the flash unit must
be turned off.
Settings for camera-controlled automatic flash mode
Once the flash unit used has been turned on and set to the
appropriate mode for TTL operation (e.g. „TTL-HSS“ on the
LEICA SF 58), the following actions are necessary on the LEICA S2
1. Before taking each picture with flash, first perform exposure
metering by gently pressing the shutter release button so
that the display in the viewfinder changes to the shutter
speed values or the light balance. If this stage is missed out
by fully depressing the shutter release button in one quick
movement, the flash unit may not fire.
2. Set the preferred exposure mode or the required shutter
speed and/or aperture. The shortest firing moment must be
taken into account as this determines whether a "normal"
flash is fired or an HSS flash.
TTL flash mode.
Fully automatic, i.e. camera controlled, TTL flash operation is
available with the LEICA S2 when using system-compatible
flash units (see p. 43), and in all of the camera's exposure
modes.
Automatic fill-flash is also provided. This means that in order to
ensure a balanced relationship between flash and available
light at all times, the flash power is reduced by up to 1
2
/
3
EV as
ambient brightness increases (fill-in flash). However, if the available
brightness requires a faster shutter speed than the set firing
moment (
1
/
125
s for focal plane shutter,
1
/
500
s for lenses with central shutter) or it is set manually, the
camera will automatically switch a system-compatible flash
unit to linear flash mode (HSS, see next section).
In addition, the LEICA S2 transfers the set sensitivity and aper-
ture to the flash unit. Provided it has the right displays, the flash
unit can then automatically adjust its specified range accordingly.
Notes:
• The following sections describe only those settings and func-
tions available on the LEICA S2 and system compatible flash
units.
• An exposure compensation set on the camera (see p. 35)
only influences the measurement of available light. If you
want to simultaneously use compensation of the TTL flash
exposure measurement in flash mode – in parallel or in the
opposite direction, you must make this additional setting (on
the flash unit).
• The HSS flash method means that flashes are emitted in
rapid succession throughout the entire shutter movement.
As a result, the available energy must be split, resulting in a
shorter range.
• More details of flash use, particularly for other flash units not
specially designed for the LEICA S2, and for different flash
unit operating modes can be found in the respective user guides.
High Speed Synchronization
Fully automatic, i.e. camera controlled, flash operation is available
with the LEICA S2 when using system-compatible flash units
(see p. 43), with all shutter speeds and in all of the camera's
exposure modes. It is automatically activated by the camera if
the selected or calculated shutter speed is shorter than the
sync speed, i.e. ≤
1
/
180
s for the focal plane shutter. If the flash
unit is set correctly, this change does not require any further
actions by the photographer.
Inhalt_GB.qxp:Leica M8 deutsch 11.12.2009 10:24 Uhr Seite 44
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