Telescope to EOS mount?

I have a 900mm reflex telescope with 114mm mirror. F/8, right?

it has a mount similar to microscope mount. Where can I get an adapter for it?

I think you'll need an EOS t-adapter and t-ring. Here's a local (to me) telescope shop that will have all the info you need.

http://www.buytelescop​es.com/

I bought an adaptor with EOS attachment on the web second hand, a trap for new players (like me!) is that there are two eye piece sizes available. Unfortunatly the adaptor I have takes the smaller eye pieces, and I don't have any of those! Turns out cheaper to buy a new adaptor than getting eye pieces that fit

Oh well the actual EOS adaptor works on any T mount Telescope adaptor.