Pentax K-7 Operating Manual page 67

You can connect an external flash to the
camera with a sync cord by using the X-sync
socket.
Remove the Sync socket 2P cap and
connect a sync cord to the X-sync socket.
• The use of high-voltage or high-current external flashes may cause a camera
breakdown.
• Flashes with reversed polarity (the center of the sync plug is min us) cannot
be used due to the risk of damaging the camera or flash.
• When a sync cord is connected to the X-sync socket, linked functions will not
work. c( _
• To prevent vignetting caused from Trailing Curtain Sync. it is recommended
to take a test shot using a shutter speed one level slower than the flash sync
speed. _'
• The contact of the X-sync socket is not dust-proof and water-resistant. Attach 5"
the provided Sync socket 2P cap when not in use.
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