I've seen a few photographers using canon and leica screw mount lenses on Canon SLR's- they had a interesting look, kinda dreamy,
perhaps it was a bit of flare from the uncoated glass. The effect was better when shooting video.
So what you're looking for is a body specific screw mount converter- I don't think you will find a digital body that accecepts those lenses without.
I have several old Praktica threaded mount lenses from my old Praktica slrs. Can I find a slr-digital body that takes the 42 mm threaded lenses?