Leica R9 Instructions Manual page 179

Notes:
Due to the distribution of the available power
over several flashes occurring in quick successi-
on, with high speed sync flash mode the guide
numbers and therefore the achievable range, are
significantly lower than in "normal" flash mode.
Therefore, high speed sync flash mode is prima-
rily suitable for illuminating subjects in the fore-
ground.
If shutter speeds of 1/250 s or slower are set (in
m ) or applied (in A ), the camera automatically
switches the flash unit to the appropriate mode
with normally controlled flash operation. This is
also indicated by the much longer range in the
flash unit display.
If the flash unit is not (yet) ready to use, i.e. it is
not yet (re)charged - the flash symbols in the
viewfinder (2.4) and rear panel (3.5) LCDs are
flashing – the set camera modes work normally
and the flash unit is not fired.
High speed sync flash mode is not possible when
mirror pre-release is active (see the appropriate
section on p. 184). In this case, the camera auto-
matically switches back to the sync speed and
there is a normal TTL-controlled flash exposure.
For more detailed information, please refer to
the appropriate flash unit instructions.
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