Canon has achieved their total EF lenses selling record to 40 millions as in February 2008!
Canon EF lens was first selling in March 1987, when they first introduce the new EOS series with fully electronic lens mount in BIG lens mount size!
In Jan 2006, Canon has achieved 30 millions production of their EF lenses, and just around 2 years time, another 10 million accumulated! (Imagine the profit they are making…)
Currently, there are 64 lenses offered by Canon to the world market. If you are rich enough…you can try collect every one of it… 😀