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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, dis-
tance 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 19014
1
(positive polarity at X con-
tact)
Connection using the lower LEMO
®
socket (1.34)
- All flash units and studio flash systems that allow control using correspond-
ing 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 ash unit (see p. 65). With a maximum guide num-
ber of 58 (for ISO 100 and 105mm setting), an automatically controlled
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 Adap-
tion (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 con-
tact, 1.14a) can also be used (without TTL flash control). We recommend
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
/
1000
s 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
/
1500
s with central shutter, the flash unit automatically switches to HSS
mode (see p. 54).
52
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