Bought together with the fixed focal length 50mm, 1.4 this Lense Extender. The autofocus will work in conjunction with the Extender is no longer, so manual focus is announced. This certainly needs a little practice. My first attempts (switch the coffee maker) have not yet soo spectacular as the sample images of other Amazon customers, but I know that I need to practice more. I look forward to going back where I can try it with leisure opportunities. A useful addition (even with the kit lens 18-135mm) for all Canon fans, but you have to admit it patiently.