The add on Amazon is misleading. Its as manual lens T-mount lens with a T-mount adaptor for EOS. Definitely not autofocus... with a range of f8-f16 its not very useful in my opinion.
Well, you might not like it after buying it. I bought something similar (a 20mm WA lens for Canon A1 FD mount) and found it to be very soft in the corners and producing worse pictures than a disposable camera.