Pentax K100 D Operating Manual page 167

Discharging Multiple Flashes
You can combine two or more external flashes (AF540FGZ or AF360FGZ)
or you can use an external flash in combination with the built-in flash. You
can use the extension cord connection terminal on the flash to connect the
AF540FGZ. You can connect AF360FGZ units as shown in the illustration
below. Connect an external flash and the Hot Shoe Adapter F (optional) to
the Off-Camera Shoe Adapter F (optional) and then connect another Off-
Camera Shoe Adapter F with external flash using the Extension Cord F5P
(optional). Refer to the flash manual for details.
• 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 AF540FGZ or AF360FGZ.
When combining two or more external flashes
When using multiple external flashes or an external flash with the built-in flash,
P-TTL is used for flash control.
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