The design of lenses for analog and digital use are somewhat different. In digital cameras it is preferable for the rays exiting the lens be as close to perpendicular to the sensor plane as possible. Oblique rays can cause various distortions and color shifts. Of course this is not a problem with film. There was a lengthy article on this subject on the web but I don't have the reference. So lenses for analog cameras may not work as well as those lenses designed for digital cameras.