>>3350927>>3351028If you're gonna do it, the 55/1.2 pre-AI Nikkor is my fave for smoothness of wide open rendering and stopped down sharpness, as well as amazing sunstars and that looong-ass focus throw. Also the Nikkormats it's designed for have real ground glass viewfinder screens, and are very easy to focus wide open.
For wide open sharpness, nothing touches the Canon nFD 50L.