Clearly not buy!

So I thought, I'll get me the same one with AF Confirm Chip. Well, that stupid is unfortunately that the chip is defective and is not recognized. This is probably because the Adapter certainly not engage correctly, as it should it (I think he may have actually a few millimeters can be turned further). That is why there is no contact between AF Confirm Chip and camera takes place logically.

(Barely tested on my 550D, same result. Not that there's someone pushes on the camera!)

I am well aware that I usually have a 14 day money back guarantee. Just bring me the little there, now comes the 2nd shortcomings, the adapter is no longer be separated from the lens. No matter what I do, it is secure and does not come off.
I wanted then did not my lens with the adapter return then return the adapter and hope that I get back my lens again.

Therefore, I am quite disappointed with your purchase and advise of this adapter.