I use horusbennu 50mm 1.7. It is a great lens. make sure you set your input focal length to 50.
2) Switch to MF
3) set the dial to M
4) Look in manual
5) set green button (manual on page 179)
The Horusbennu is an excellent lens. don't let people talk you out of it because it is a bargain price. I consistently get 20x30 prints from mine.