Yongnuo Camera Lense YN85mm F1.8R DF DSM for C-RF 85mm 1.8

A portrait lens perfectly suited to full-frame Canon cameras. Very good image quality, even at f/1.8. It's fairly compact, solidly built, and superbly ergonomic, with a focus ring that can be clicked on and used as a control ring like Canon's. (Note that they've removed this function from the new model).