https://www.cameraconcepts.com/baader-wide-t-ring-canon-eos-with-d52i-to-t-2-and.html
Baader Wide-T-Ring Canon EOS with D52i to T-2 and S52 - Camera Concepts & Telescope Solutions
Baader Wide-T-Ring to connect Canon EOS DSLR cameras on the Astro T-2 system