Amazon.com : T2 T Ring Adapter and T Adapter 1.25'' Metal for All Canon EOS Standard EF Lenses and Telescope Camera Astrophotography Accessories : Electronics
Canon Control Ring Mount Adapter EF-EOS R - Mike's Camera
Canon Control Ring Mount Adapter EF-EOS R | Canon U.S.A., Inc.
Canon EF-EOS R5, EOS R6, EOS R and EOS RP Control Ring Lens Mount Adapter 2972C002 - Best Buy
Celestron 93419 T-Ring for 35 mm Canon EOS Camera (Black) : Canon Rebel T Ring : Electronics - Amazon.com
Canon EOS Rebel T6 Dual Macro LED Ring Light / Flash (Applicable For All Canon Lenses) (CAMERA NOT INCLUDED) - Walmart.com
Baader Canon EOS DSLR T-Ring with 2" Filter Thread and Nosepiece # DSLR-T 2958550
William Optics 48mm Wide T-Ring for Canon SLR/DSLR EOS Cameras - Black # TM-CN-EOS-M48
T-Ring for Canon EOS "R" Mirrorless Cameras (TEOSR) - TelescopeAdapters