This is probably a dumb question, but my dad has an old 35mm Nikon SLR, which one I can't recall, but he doesn't use it anymore and I was wondering if that those lenses would work on a Nikon Digital SLR. Since I would like to buy one over the holiday (or even better find it under a christmas tree) I would like to save money if I could, and just use those lenses. Thanks a lot.