For a seamless transition from your current hot shoe accessories to the multi-function shoe, the Multi-Function Shoe Adapter AD-E1 is  the answer. The Multi-Function Shoe Adapter AD-E1 provides a reliable connection for dust and drip proof Speedlite accessories that  you may already own such as the Speedlite EL-1, Speedlite 600EX II-RT, Speedlite 600EX-RT, Speedlite 580EX II, ST-E3-RT or  OC-E3 flash cord. The shoe adapter will also hold current accessories such as shotgun mics and on-camera LED panels securely to  the camera body with dual locking pins on the multi-function shoe side.