Jen you need this
https://www.bintelshop.com.au/welcome.htm and depending on the size of your focuser (I am assumming 2" ???) something like this
https://www.bintelshop.com.au/welcome.htm or this
https://www.bintelshop.com.au/welcome.htm. There are lots of different options for the nose piece but the EOS ring is pretty standard. Most online suppliers can get these for you so shop around for the cheapest price. People who use 2.6, 3, 3.5 and 4" focusers will generally have an adaptor that will let you plug in the 2" nose piece so yes you can even use it on a 20" scope.
Mark