Hi Agrafx, personally I have used it a lot with a Canon 600D (Rebel T3i) and a Canon EOS R but I don't know if it is compatible with all Canon cameras.

If you can use Canon flashes on your camera, then the extension cable will also fit.

You can use a tripod for example. There is a 1/4" thread (like the cameras) on the back of the extension. Video: https://www.youtube.com/watch?v=-Js90CX_KTk or image: http://www.custombrackets.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/c/a/canoncordalone.png