Yes, via a lens adapter available from aftermarket producers. All Canon FD lens to Canon EOS lens mount adapters will contain an optical element to provide correct focus at infinity. This is because the Canon FD lens flange focus distance (distance from the focus plane to lens mount) is shorter then the Canon EOS lens.

It depends on the make of the lens and the mount type. Newer Canon lenses have an EF mount while Nikon lenses have a Nikkor mount. Though you can purchase conversion kits to put a Canon lens on a Nikon and vice versa.

One of the most compatible lens for Canon brands is APS-C 22x14mm. Also, another compatible lens for Canon brands is 36x24mm.

Canon EF lens mount was introduced in 1987. It is the standard lens for Canon EOS family of SLR films and digital cameras. The EF or Electronic Focus is handled by a dedicated electronic motor which is built into the lens.

You can purchase a Canon EF lens mount at your local photography store or bigger electronics store. If you want to purchase it online, look for deals on Amazon or eBay.