PHRubin wrote:
Canon has no licensing agreement for their RF mount (with electronics). Since I use Canon, I use the EF-RF adapter which allows me the use of all EF and EF-S compatible lenses from all manufacturers on my R series body.
My thoughts as well - I am considering getting a Canon R5 - everything I read says that using the EF-RF adapter yields very good results, so I will not only be able to use my very expensive EF lenses but can also use 3rd-party lenses made for the Canon EF mount if I wish.