I should add to the above that you also say these lenses are suitable for digital.

They are most certainly not, as lenses for digital require a much more parrallel light path than lenses designed for film.

Better to say they CAN be used for digital though with subsequent quality losses (more pronounced away from the centre).

It would be bad enough with an APS-C sensor but if you stuck one of these on a full frame body it would be very nasty.

Lenses like these would really only be suitable for amateur novices shooting film.