hotshoe - Canon EOS 4000D Hot Shoe for Sync (with Studio Flashes) - Photography Stack Exchange
Amazon.com : Pixel Hotshoe Adapter with Pc Port for Sony A7 A7S A7SII A7R A7RII A7II NEX6 RX1 RX1R RX10 RX100II HX50 A6000 A6300 to Canon Nikon Flash Speedlite and Flash Trigger :