※ Please be sure to read the following! This is a mount adapter for attaching EF-mount lenses to a Canon EOS-R RF-mount camera. It functions normally and the control ring operates smoothly, but there is a slight issue. This product has old firmware, so it continues to consume camera power just by being attached. I attached this adapter to a fully charged camera and took photos until the battery ran out, and as expected, the battery drained slightly faster, so please be aware of this. I tried to update the firmware myself, but I couldn't figure out how, so I gave up. When purchasing, please understand these points, or assume that you can update the firmware. The following is a product description generated by AI. EOS RF mount adapter with control ring. - Brand: MEIKE - Model Name: Control Ring Mount Adapter EF-EOS R - Type: Mount Adapter - Features: With control ring Thank you for viewing. #RF lens #Mount adapter #Canon