Pentax K-r Operating Manual page 47

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iiWire,ess F,as. Centre, P-TT. F,as. Mode
When using external flash units (AF540FGZ or AF360FGZ) for
wireless shooting, the following information is exchanged between
the flash units before the flash is discharged.
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Press the shutter release button fully.
÷
1 The(relaysflaShthedirectlYflash modeC°nnectedof the tOcamera).the camera emits a control flash
2 The wireless remote flash emits a test flash (relays confirmation
of subject).
3 The flash directly connected to the camera emits a control flash
(relays flash output to the wireless remote flash).
* The flash directly connected to the camera will emit a control flash one
more time after this to relay the flash duration time when HS _ (High-
speed sync)is set.
4 The wireless remote flash discharges as the main flash.
_ When the wiretess mode of the external flash directlY connected to
........ camera is set to [MASTER] or [!7. Flash in Wireless Mode] (p.184) is set
to [On] for the bui!tqn flash, all the flashes Wi!! discharge Simu!taneous!y_
Red-Eye Reduction
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As with the built-in flash, the red-eye reduction function is available
with an external flash. However, this function may not be available on
some flashes or may have restrictions for usage conditions. Refer to
the chart on p.180.
_i_ _ , ]-he red-eye reduction function Works bY discharging the f ash twice
even when only an external flash is used: (p.79)
t!f the red-eye reduction function of the built-in flash is used when the
external flash is set as the slave unit or with _he wireless function, the
pre:flash for red-eye reduction will trigger the external flash: Donot use
the red-eye reduction function when using a slave unit.