The 9.5'-long Pentax F5PL Extension Cord provides off-camera TTL flash capability for Pentax cameras when used in combination with
- Off Camera Shoe Adapter F (#31022)
- Hot Shoe Adapter F(#31046) OR Hot Shoe Adapter Fg(#31045).
The difference between Hot Shoe Adapter F & Hot Shoe Adapter FG is that the "FG" version allows the use of a camera's pop-up flash while the "F" version obstructs use of pop-up flashes but has a flash shoe of its own.
The shorter F5P (#37347) can be substituted for the F5PL Extension Cord in this combination if shorter distance is desired between the camera & the flash, with less clutter