Leica R9 Instructions Manual page 183

Notes:
Any number of pre-flash measurements are pos-
sible before taking the photograph. Each new
measurement overwrites the previous one.
1
Manual flash exposure compensation of ± 3 / EV
3
is also possible in TTL HSS mode as an alterna-
2
tive to the automatic –1 / EV compensation.
3
They are set and turned off as described in the
sections "Flash exposure compensation" on p. 160
and "Manual flash exposure compensation in
camera exposure mode P " on p. 166.
With a manually set ( m ) or automatically con-
trolled ( A ) shutter speed of 1/250 s or slower
and with no pre-flash/es, there is a normal TTL
controlled fill-in flash exposure. With pre-
flash/es there is a guide number controlled fill-in
flash exposure according to the calculated sub-
ject brightness and based on the TTL pre-flash
metered result.
To control the depth of field without firing a
pre-flash, the flash unit must be turned off first.
177