@gary mulder thanks a lot for the comparison between the different 180s, it has shed some light on the difference between the Apo Rodagon 180 f4.8 and the Sinaron Digital 180f4.8. I wasn’t really able to find other information online about that, could I ask if you have any other info from Sinar or Rodenstock? It’s my understanding that it’s a tuned version of the Apo Rodagon, but as I wanted to use it with 4x5 film I need to get some specs about the lens coverage. It would be also very interesting to know if it’s optimized for infinity or close-up ranges… thanks in advance, feel free to to DM me if you think I’m going off-topic with that