In this article, we run through the adapter options for mounting EF lenses to EOS R bodies and explain how you really can get the best of both worlds.
Accessories Canon EOS R + EF adapter + ZEISS Milvus 18mm f2.8 - Foto Erhardt
Using EF lenses with the EOS R System - Canon Hungaria
Hireacamera - Canon EOS RP (EOS-RP) with EF-EOS R Adapter hire - rental
Canon EOS RP Full Frame Mirrorless Camera Body with EF-EOSR Adapter 3380C002 ADAPT Mirrorless Cameras - Vistek Canada Product Detail
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FotodioX Lens Mount Adapter for Canon EF EOS-EOSR-NDTHRTL-CINE
Understanding the Canon EOS R — why it doesn't have in-body image stabilization
Adapting Your Canon DSLR Lenses to EOS R Cameras
Canon EOS R Body + RF 24-105mm f/4L IS USM Lens + Mount Adapter
Canon EOS R8 BODY + RF 24-50MM F4.5-6.3 IS STM