Pentax K-X Operating Manual page 55

By using two external flashes (AF540FGZ or AF360FGZ) or using the
built-in flash with one or more external flashes, you can shoot in P-TTL
flash mode without connecting the flash units with a cord.
' Set the power switch 0fthe externai flash to WIRELESSI
• Two or more AF540FGZ/AF360FGZ external flashes are required to use
high-speed flash sync in the wireless mode. Thi s function cannot be used in
€ombination with the bu tt4n flash.
, Set the wireless mod e of the externa I flash not directly €onnected to the
camera to SLAVE.
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First, set the channel for the external flash unit.
/ Set the channel for the external flash unit.
2 Remove the cover of the hot shoe and attach the external
flash.
3 Turn on the camera and the external flash, and press the
shutter release button halfway.
The built-in flash is set to the same channel as the external flash unit.
w
• When Set to _. mod e, the Channel currentlY Set for the built_i n flash is
displayed in the viewfinder f0r 1O seconds,
• Be sure to set all the flashes to the same channel. Refer to the manual of
AF54OFGZ or AE36OFGZ for details on how to set the channet on the
external flash.