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FLASH OPERATION
GENERAL INFORMATION ON FLASH EXPOSURE METERING
AND CONTROL
The Leica S determines the required flash power by firing one or more
ranging flashes in quick succession, fractions of a second before taking
the actual picture. Immediately after this, at the start of exposure, the
main flash is fired.
All factors that influence the exposure (such as filters, aperture setting,
distance to the main subject, reflective surfaces, etc.) are automatically
taken into account.
COMPATIBLE FLASH UNITS
Connection using the flash shoe (1.14)
- All flash units and studio flash systems that comply with the currently
valid ISO standard 10330 and the older DIN 190141 (positive polarity at
X contact)
Connection using the lower LEMO® socket (1.34)
- All flash units and studio flash systems that allow control using corre-
sponding special cables
Connection using the flash connecting socket (1.31)
- Studio flash systems and other flash units with flash cable and standard
flash connector
The following flash units, when used on the Leica S, are capable of all the
functions described in this manual:
1 If, for example, you want to connect a studio flash system to the Leica S that does
not comply with the ISO standard, contact Leica Camera AG's Customer Care
department (for address see p. 74) or the customer service department of a Leica
agent.
The Leica SF 58 system flash unit (see p. 65). With a maximum guide
number of 58 (for ISO 100 and 105mm setting), an automatically con-
trolled zoom reflector, an optional second reflector and many other
functions, it is both powerful and versatile. Thanks to its permanently
attached flash foot with additional control and signal contacts, which
are used to automatically transfer a range of data and settings, it is very
easy to use.
Flash units that meet the technical requirements for System Camera
Adaption (SCA) System 3002, are equipped with an SCA-3502-M5 2, 3
adapter, allow guide number control and are HSS compatible (see p. 54).
However, other commercially available flash units with a standard flash
foot 4, 5 and positive center contact, and fired by the center contact (X
contact, 1.14a) can also be used (without TTL flash control). We recom-
mend the use of modern thyristor-controlled electronic flash units.
2 When using the SCA-3502 adapter (version 5 onwards) the white balance (see p.
33) can be set to Automatic for correct color reproduction.
3 The use of flash systems from other camera manufacturers and SCA adapters for
other camera systems is not recommended as their differing contact positions
and assignments can result in malfunctions or even damage to the camera.
4 If flash units not specially designed for the Leica S are used, the white balance on
the camera should be manually set to if required.
5 The set aperture and the sensitivity may need to be entered manually on the flash
unit.
FLASH SYNC SPEED
With conventional flash technology, i.e. when setting the shutter speed
dial to (see p. 8) with the camera's focal plane shutter, the flash
sync speed on the Leica S is 1/125 s. If the central shutter in compatible
lenses (see p. 24/65) is used, all shutter speeds up to 1/1000s are
available.
With system compatible HSS (see p. 54) flash units, all faster shutter
speeds can also be used.
Studio flash systems in particular often have luminosity times that are
considerably longer than the specified sync speeds. In order to take
full advantage of the light quantity provided by these flash units, slower
shutter speeds are recommended.
Notes:
At all shutter speeds up to the sync speed 1/125 s in the viewfinder
(2.5b) X lights up to indicate that normal flash operation is possible at
these speeds.
If the shutter speed dial is set to , the defined shutter speeds then
mean that the preset exposure modes may be changed, i.e. from to
, or from to (see p. 42). As soon as a shutter speed is specified
again, the original modes are reset.
If you are using the Leica SF 58 (see p. 65) and faster shutter speeds
are set on the camera, i.e. 1/180 s with focal plane shutter, and
1/1500s with central shutter, the flash unit automatically switches to
HSS mode (see p. 54).
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