gdi
Veteran
Another plug for the Nokton 50/1.5. A super lens. Still available new @ $800 with M adapter from CameraQuest.com. Get one while they're last!
Otherwise, the diminutive ColorSkopar 50/2.5 is my choice in a new lens. Any Leica Summi is exc too, used, as are Zeiss Planars. Each lens has its particular character.
$800! I think retail was $339 when I bought mine. I can't believe anyone would pay that much for one.