Canon Control Ring Mount Adapter EF-EOS R

if you have old cropped lenses and you buy an RF cannon full frame, you must own this adaptor! auto focus, i guess it auto crops, but no more black edges that you have to crop out.

This adapter makes using EF lenses of R series cameras effortless Basically, it's just a metal ring that moves the lens a bit away from the image sensor so it focuses properly with the correct focal length. Doesn't even have--or need--optics. But it is very well-constructed with precision and quality finish you won't find in third-party adapters. The control ring on this model is a nice addition as it adds extra functionality EF lenses lack on their own. How often do adapters ADD features with zero reduction in functionality? And it doesn't add excessive weight or bulk to the setup. A great purchase!