That all changed in 2018 when Canon released the first EOS R camera, a mirrorless interchangeable lens camera that had a new lens mount, known as RF. The RF mount is wider than EF, though the ...

Central sharpness is outstanding from f/2.8 to f/5.6, excellent from f/8 to f/16 and still very good at f/22. The edges do not fare so well, but are very good from f/2.8 to f/5.6, good from f/8 to ...