The AD-E1 is designed to allow existing Speedlites that have dust- and drip-resistance features to be used with cameras that have the new Multi-Function Shoe. Sturdy design build for the attachment of large accessories.
Sealings at all the connecting points ensures dust- and drip- resistance capability when using existing Speedlites. Some of these includes the Speedlite EL-1, 600EX series, and 580EX II, which require this adapter to maintain its dust- and drip-resistance capability on the Multi-Function Shoe.