I like my 40 1.8 Hexanon on a Konica T4 or FT1. It is compact and razor sharp.
I totally agree! The images from the 40mm have a snap to them that is not present in the other Konica normals. I have not been impressed with the 57mm f1.4 (I have several) I think the 40mm is a spoiler lens - by far the best in the normals of Konica.