Soft focus being the result of the old lenses focusing different colors of light to different planes, it's going to be difficult to reproduce.  Beneath the "blurring" there is a sharp image.  I still have an old Kodak Anastigmat in a medium format camers, gives a beautiful portrait, but cut film and I no longer have my darkroom.  I'd have no idea how to produce the effect.

Doric.

The "I" in Doric is Silent.