With the Canon EP-EX15II Extender for Canon EOS I now finally have a clear view through the viewfinder. I see the whole picture, I'm clear view, no longer restricted and can now also see the onscreen settings at last. All in all, I am more than satisfied!
Another advantage is the increased through the eyepiece distance nose to display.
I am completely satisfied and can recommend this Extender anyone who feels "limited" when looking through the viewfinder.
You have to remember that the image to be seen through the eyepiece reduced only. What we wear glasses is very convenient, can be perceived as a disadvantage for others. At the very least need to get used to those certainly more to this reduction.