Now the same for the first downside: receive it from GB and takes 14 days so I have to unfortunately pull no star. The ring is perfectly executed, better than a durchfuehrungsloser adapter, and fits perfectly - it has a detailed manual with a few tips and lay a warranty certificate, and both Aperture and AF function absolutely true to expectation. The integrated tripod mount is solid.
The AF (I have a Sigma 70-300 for the EOS) is very fast, but he has problems - hectic back and forth, until then, often focused - or not. The best works in the macro mode. Can count on it not, and that seems to be so in all similar adapters ... sure, the Sigma is also in Canon users not for his precise AF famous.
I have it also uses the new Canon 10-18 WW, and provides exactly sharp, if the AF responds.
But He does unfortunately rare ...
This adapter is actually called "Commlite Focus car mount adapter", the Chinese manufacturer is commlite.com
Resume: this is a good adapter when working manually - the main thing that the aperture is carried out!
Who hopes for full Interkompatibilitaet, must learn that camera manufacturers simply do not have the slightest interest in it once again.
ADDENDUM October / November 14:
Now it looks as if the lack of AF performance has been lying on the lenses - the Sigma should generally override, while the Canon WW was defective from the onset. The thing now is the focus no longer, not even manually.
This can be regarded as innocent the adapter well.