Nothing to add to what's already been said (but I will anyway
)...
In case you didn't know, FD lenses date from the days before autofocus and were used with such gems as the Canon A1, AE1, etc back in the 1980s. They were superseded by the EF lenses when the EOS cameras were introduced, and the mounts are completely incompatible without an adapter (which may affect focus range if it doesn't have lens elements of its own, or quality if it does).
The quality of some of the FD prime lenses is very good, but on an EOS camera you would be restricted to manual everything.
Personally I wouldn't bother. Better to buy the EF 50mm f/1.8 and extension tubes.
