Served its purpose for acceptable price

I use this adapter to my NX300M and have primarily acquired him, because I wanted to use my old Canon 50mm f1.8 and a wide-angle lens with EF bayonet on.
The part of the job. Of course you always have to make compromises in the use of adapters, because of specially designed for the type of camera lenses can foreign lenses with adapter then in terms of picture quality but just not approach problems. In addition, of course, must be dispensed with autofocus; but is already referenced in the description that it is a purely mechanical adapter.
Especially considering the price I can not expose anything about this product. The goods delivered by said lenses in conjunction with the NX camera quality is fine, though not absolutely flawless.