I have read in the forums that one or two older lenses are still as good as their modern counterparts (with image circles to cover 4x5 format), at least in terms of resolution.
As an example (and judging by the MTF's) I would guess that the older lead-glass Schneider Apo-Symmar range is as good as the newer lead-free Apo-Symmar L range albeit with a smaller image circle (or am I wrong?).
Are their any users out there who have been able to compare the older lenses with the modern lenses (in the same focal length) from the same manufacturer? If so, which old lenses are inseperable, or even better, than their modern brethren in terms of resolution, flare suppression, colour rendition, etc.?