The Canon AD-E1 Multi-Function Shoe Adapter lets you use legacy shoe-mounted accessories on Canon cameras that feature the Canon Multi-Function Shoe. This adapter is great for Speedlites, shotgun mics, on-camera lights, and other accessories. It boasts a weather-sealed design and gives you a secure connection to the Multi-Function Shoe via dual-locking pins.
For example, you can use the AD-E1 to mount the Canon ST-E3-RT Speedlite Transmitter – V2 and Canon Speedlite EL-1 to the Canon EOS R5 C or Canon EOS R3. You can see other compatible products under Recommended on the left-hand side of this page.