Amazon.com : Opteka 500mm/1000mm f/8 Manual Telephoto Lens Compatible with Canon EF-Mount EOS 90D, 80D, 77D, 70D, 60D, 60Da, 1Ds, Mark III II 7D, 6D, 5D, 5DS, Rebel T8i, T7i, T7s, T7,
Vello Accelerator Lens Adapter for Canon EF-Mount LAG-NEX-CEF
Amazon.com : NEEWER Wide Angle Lens Compatible with Canon G7X Mark III Camera, 2 in 1 18mm HD Wide Angle & 10x Macro Additional Lens with Extension Tube, Bayonet Mount Lens Adapter,
Canon Drop-In Filter Mount Adapter EF-EOS R 3443C002 B&H Photo
Fujica 35 X-Mount SLR Lens to Canon EOS Mount SLR Camera Body Adapter – Fotodiox, Inc. USA
FotodioX Canon EF / EF-S Mount Lens to Can EOS-EOSM-PRO-AUTO B&H
Amazon.com : MFT Lens Mount Adapter for Canon EF/EF-S Lens to Panasonic and Olympus Micro M4/3 Cameras : Electronics
Amazon.com : Opteka 58MM 0.35x Fisheye Wide Angle Lens Compatible with Canon DSLR Cameras Including Macro Close Up Attachment : Camera Lenses : Electronics
Canon FD and FL SLR Lens to Canon EOS Mount SLR Camera Body Adapter – Fotodiox, Inc. USA
Camera & Lens Compatibility Chart (Updated) : r/videography
Compatibility Guide for Lenses - Canon Europe
Canon EF lens mount - Wikipedia
Pro Lens Adapter - Canon 7/7S 'Dream Lens' to Leica L-Mount Cameras – Fotodiox, Inc. USA
Amazon.com : Vello Auto Lens Adapter fits Canon EF/EF-S Lens Compatible to Sony E-Mount Camera : Electronics
Canon lens compatibility
Canon EF-EOS R5, EOS R6, EOS R and EOS RP Control Ring Lens Mount Adapter 2972C002 - Best Buy
Canon EF-S lens mount - Wikipedia
EOS to E Mount Adapter Canon EF EF-S Mount Lens to E NEX Mount - KENTFAITH