The Sony FA-CS1AM Off-Camera Shoe is used to add an off-camera cable
socket to Sony Alpha system flash units (or Minolta Maxxum type models),
which do not have this socket built into it. You can then use the
FA-CC1AM Off-Camera Cable to operate the flash away from the camera.
This allows for more flexible flash positioning and more precise light
balance control with Sony Alpha SLR camera series.