The EF-EOS R Adapter allows Canon EF and EF-S lenses to be used on the R series cameras, including the R, RP, R5, R6, R7, R8, R10, R50, R100 models. This lens adapter provides compatibility between the Canon EF lenses and the R series cameras, allowing photographers to continue using their existing lenses while also taking advantage of the advanced features offered by the R series cameras. With this adapter, photographers can expand their creative capabilities without having to invest in new lenses specifically designed for the R series cameras.