Leica M10 Instructions Manual page 71

Flash exposure control
Fully automatic flash mode, i.e. controlled by the camera, is avail-
able on the camera with the system-compatible flash units listed in
the previous section, and in aperture priority
sure modes.
In addition, automatic illumination control is operational. This
means that in order to ensure a balanced relationship between
flash and other lighting at all times, the flash power is reduced by
up to 1 / EV as ambient brightness increases. However, if the
2
3
ambient brightness plus even the shortest possible flash sync time
of ⁄ s would cause overexposure, a non-HSS compatible flash
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unit will not be fired in aperture priority mode. In such cases the
shutter speed is governed by the ambient brightness and is shown
in the viewfinder.
In aperture priority mode and with manual setting, the camera
A
also allows the use of creative flash techniques such as synchroni-
zation of flash firing with the 2nd shutter curtain rather than the
1st as is usual, and flash with slower shutter speeds than the sync
speed of ⁄ s. These functions are set on the camera using the
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menu (for more details, refer to the relevant sections below).
In addition, the camera transfers the set sensitivity to the flash
unit. This allows the flash unit, provided it has received such infor-
mation and the aperture manually set on the lens is also input to
the flash unit, automatically to adjust its range values accordingly.
With system compatible flash units, the sensitivity setting cannot
be influenced from the flash unit as it is transferred from the cam-
era.
Notes:
• Studio flash systems may have a very long burning time. There-
fore, when using them it may be useful to select a slower shutter
and manual expo- speed than
A
• The same applies to radio controlled flash triggers for "wireless
flash control", as the radio transmission can cause a delay.
• The following sections describe only those settings and func-
tions that are available when using this camera with sys-
tem-compatible flash units.
• An exposure compensation set on the camera (see p. 170)
only influences the measurement of available light! If you want to
simultaneously use compensation of the TTL flash exposure
metering in flash mode – in parallel or in the opposite direction,
you must make this additional setting (on the flash unit). (Excep-
tion: With the Leica SF26, correction must be set in the camera
using menu control.)
• More details of flash use, in particular for other flash units not
specially adapted to this camera and for different flash modes,
can be found in the relevant instructions.
⁄ s.
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EN
183