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The Canon AE1 uses FD mount lenses and the newer canon DSLR cameras use EF lens mounts. You can find a lot of information online about mounting these old lenses on a current Canon DSLR camera, but there are very little uses for these lenses. The reason for this is because of the back focus (focal) distance being much longer on the newer Canon DSLR cameras. The focal distance on the Newer Canon EOS cameras is 44mm. The distance on the older FD style mounts is 27.8mm. Because of this, to achieve proper back focus on a new Canon DSLR camera using an old FD mount lens, the lens would have to be mounted inside the camera body which isn't possible. You can buy a cheap adapter ring for about $10 that will allow you to mount the lens and you can use it in the manual mode, it just won't achieve anywhere close to infinity focus. The only application where this is even applicable is using the lenses for some macro photography.
So to answer your question in general, yes it is possible to mount the FD lenses to a current Canon DSLR camera using a ring mount adapter. Canon does not recommend that you do this and they say it can cause damage to the camera and it's only applicable in very limited shooting conditions. Hope this helps. If you have any further questions please feel free to ask and I'll help any way that I can. Please don't forget to leave a positive rating for me. Thanks and have a wonderful day!!!
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