.ot the voigtlander, but I put my old? canon Fd 85/1.8 on my XP2 the other night and it was super. Inside, at night I took a series of pictures of my wife. Lens wide open, close enough that her face filled the frame and focus was good in all but 2 - I think where I moved.
I printed one of the jpgs at 22.5 by 15 inches and it was lovely. The lens is probably not as sharp wide open as a modern fuji lens, but it draws as beautifully as I remember from my ae-1 days.
I suspect the voigt 75 would also work well.