This lens seems to be very interesting on the D600. I am tempted to buy the 1.4/58mm but the 1.2/55 seems to be a very interesting option too...
The 55mm f1,2, any version really, is a very interesting lens. As well as a lens I use a lot. It is usable wide open already, but becomes really sharp and contrasty at f2 and then turns into a very well controlled sharp lens at f5,6, so you could use it dreamy/swirly and glowing at f1,2, decied to use the still limited DoF with a very sharp subject at f2 or make excellent landscape shots at f5,6. Everything goes.
I know Chris Dees also likes his copy, and he recently had a copy for sale so you might contact him about that to see if he still has it.
John, lovely smooth background rendering. You hit the focus on both, which is quite good knowing how the DoF is thinner then what the focus screen on your Df shows you.
Frank, looking forward to what you can do with all those rolls of film