Pentax K-500 Operating Guide

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When combining two external flashes
Combining two or more external flashes (AF540FGZ, AF360FGZ or 
AF200FG) or using an external flash in combination with the built-in flash 
allows multiple flash photography (contrast control sync flash 
photography). This is based on the difference between the amounts 
of light discharged from multiple units. 
1
Connect the external flash to the camera indirectly. 
2
Set the sync mode for the external flash to contrast-control- 
sync mode. 
3
Confirm that both the external flash and built-in flash are fully 
charged and then take a picture. 
When using multiple external flashes or using an external flash with the built-in 
flash, P-TTL is used for flash control. 
Using the Contrast Control Sync Flash
The AF200FG must be combined with the AF540FGZ or AF360FGZ. 
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K-500.book  Page 261  Friday, June 14, 2013  2:29 PM