Leica M Operating Instructions Manual page 160

EN Settings for camera-controlled automatic flash mode
After the flash unit in use has been turned on and set to guide
number control mode (e.g. TTL or GNC), the following actions on
the camera are necessary:
1. Before taking each flash picture by gently pressing the shutter
release, so that the display in the viewfinder shows the shutter
speed or switches to the light balance. If this stage is missed
out by fully depressing the shutter release in one quick
movement, the flash unit will not fire even if required.
2. The shutter speed dial must be set to
speed ( ⁄ s), or to a slower shutter speed (including
1
180
aperture priority mode, the camera switches automatically to
the sync speed or to a slower shutter speed appropriate to the
ambient light. (see "Selecting the sync speed / the sync speed
range", p. 158).
3. The desired aperture, or the aperture required for the relevant
distance to the subject, must be set.
156
Note:
If the automatically controlled or manually set shutter speed is
faster than
HSS-compatible (see p. 158).
Flash exposure displays in the viewfinder with system-com-
patible flash units
A flash-shaped LED appears in the viewfinder as confirmation and
, to the flash sync to display the various operating conditions. This LED appears
A
). In together with the displays for exposure metering for the ambient
B
light level, described in the relevant sections.
In automatic flash mode
(flash unit set to GNC or TTL)
•
•
•
•
⁄ s, the flash is not fired unless the flash unit is
1
180
does not appear despite the flash unit being switched on and
ready for use:
A faster shutter speed than
⁄
1
180
and the connected flash unit is not HSS-compatible
cases the camera will not fire the flash unit even though it is
switched on and ready for use.
flashes slowly (at 2Hz) before the picture is taken:
The flash unit is not yet ready to use
is lit up before the picture is taken:
The flash unit is ready for use
remains continuously lit after taking the picture, and the other
displays go out:
The flash power was sufficient, the flash unit remains ready for
use.
s is set manually on the camera
In such
.