Will the EOS R3 retain all its functions with an EF lens?

[Brewster]

Greetings to all , I am new here. I am considering purchasing a R3 and am wondering if this camera will retain all of its functions while using EF lenses with an adapter.
Thank you for any thoughts.

[deebatman316]

Yes it will but note that older EF lenses ARE NOT FULLY COMPATIBLE with ALL features found in the EOS R Series. Those include 12 fps, Support for Dual Pixel AF, Slow AF Transitions, Smooth Aperture Transitions also the speed of the AF motor doesn't change. Those are hardware limitations that can't be solved with firmware updates.