I'm looking to buy a DSLR in the near future. A friend of mine has an old Canon AE-1 that he bought in the 70's, and a few lenses that he bought in the early-to-mid 80's. If I bought a new Canon DSLR, would these lenses work for the time being? I understand that the quality would be far from ideal, but I figured it would give me a chance to buy the camera sooner and learn a bit before splurging on new lenses. Thanks for any help.