Hi, I try to play some telegragh with a 70-210 ES lens on EOS R. I am currently using a EF-RF adaptor to mount the EF lens to EOS R. Can I add a RF 2x mount between the R5 and EF-RF adaptor and make the lens to 400mm? Thank you.
Thank you guys. Seems EF lens + EF extender + RF converter works while EF lens + RF coverter + RF extender doen't. I will pursue the fist path and give it a try.
