This is a hot shoe for portable flashes that features a PC female outlets
It has a &ldAquo;hot” contact on the top, and a shoe mount socket in the bottom.
This adapter allows you to connect a flash via PC Sync cord to the hot shoe of the camera. That is why the adapter is perfect for cameras which don’t have an own PC Sync socket. Additionally the adapter has a hot shoe at the topside, in which you can put an on-camera flash. So besides the flash, which is connected via cord, you can also trigger an on-camera flash. The adapter works with manual and TTL-compatible on-camera flashes. However, the adapter only transmits the trigger impulse. So in any case you have to set the flash exposure on the flash itself.