If your CCD is a zwo, you can get an EOS adapter for direct to ASI camera, and anotehr one for EFW filter wheel, both (as I read) designed to bring EOS DSLRs with mirrors to the correct backfocus.
I plan on using these. If the above is incorrect, please do point it out!
https://astronomy-imaging-camera.com...eos-t2-adapter
https://astronomy-imaging-camera.com...er-efw-asi1600