Pentax SLR Operating Manual page 160

158
Discharging Multiple Flashes
To use two or more external flashes simultaneously, either use the same
type of flashes as shown in the flash function chart on p.153 or use the
combination of AF360FGZ/AF500FTZ/AF330FTZ and AF400FTZ/
AF240FT. The built-in flash can be combined with any type. Connect them
as shown in the figure below: Attach an off-camera shoe adapter F
(optional) to the external flash and the hot shoe adapter F (optional) and
connect the extension cord F5P (optional) to the off-camera shoe adapter
F on the other external flash.
• Do not combine with accessories that have a different number of contacts
such as a Hot Shoe Grip. A malfunction may occur.
• Combining with flashes from other manufacturers may cause equipment
breakdown. We recommend using the PENTAX dedicated automatic
flashes.
5
When combining two or more external flashes
• The AF500FTZ can be connected directly to the Extension cord F5P without
the off-camera shoe adapter F.
• When using multiple AF360FGZ units or an AF360FGZ unit with the built-in
flash, P-TTL is used for flash control. Other flash combinations use TTL.