The Pentax Hot Shoe Adapter FG attaches to the hot shoe of Pentax cameras to provide extension of the TTL flash capabilities when used with either the (#37347) F5P or (#37349) F5PL Extension Cords and the (#31022) Off-Camera Shoe Adapter F (which is equipped with a 1/4"-20 threaded tripod hole). Some Pentax flashes, such as the AF-540 FGZ, do not need the Off-Camera Shoe Adapter F because they directly accept the F5P & F5PL cords.
Note:
Alternatively, Off-Camera Shoe Adapter F (Pentax #31046) provides the same functions as the Hot Shoe Adapter Fg without occupying the TTL hot shoe. It should be used to provide TTL flash capacity both directly on top of the camera as well as off-camera