Canon FD and FL SLR Lens to Canon EOS Mount SLR Camera Body Adapter – Fotodiox, Inc. USA
Metabones has released a Canon EF to RF speed booster to reduce the EOS R 4K crop factor
Lens adapter to give full frame perspective on crop sensor cameras? -- Canon Lenses in photography-on-the.net forums
Mitakon Lens Turbo Adapter Mark II For Nikon Z Cameras (APS-C) | Mitakon - ZY Optics
Vello Auto Lens Adapter for Canon EF/EF-S Lens to LAE-CM-CEF B&H
Medium Format Lenses – Part II - Infrared Conversions, IR Modifications & Photography Tutorials | Life Pixel IR
Oh crop! - EOS R with independent lenses for APS-C cameras
Lens Rentals | Blog
Metabones®
Canon Lens Compatibility Guide. Types of Canon Lens Mounts + Adapters
Metabones Speed Booster adapter gives lenses an extra f/stop and nearly full frame focal lengths on APS-C sensors - Newsshooter
Used Metabones T Speed Booster Ultra 0.71x Adapter MB_SPEF-E-BT2
Lens adapter - Wikipedia
Canon EF-M lens mount - Wikipedia
What is Crop Factor? Here is What You Need to Know | PetaPixel
Canon EF Lens to Sony E Mount T Smart Adapter (Mark V) — Glazer's Camera Inc
Metabones Speed Booster XL 0.64x Adapter for Nikon F-Mount Lens to Select Micro Four Thirds-Mount Cameras - Walmart.com
Metabones®
What adapter can I use to increase the crop factor on my APS-C camera to full frame? - Quora
Metabones®
ADAPTER vs SPEED BOOSTERS and Crop Factor EXPLAINED - YouTube
Understanding Crop Factor | B&H eXplora
