Particularly in the home of the wide angle is a great addition. Outside, I could not test it unfortunately.
I could not detect any distortion until now. How well this is a Wide Converter setting is at the Camera so that the videos look even a little bit better.
The lenses sit tightly together and make a quality impression. Also the Adapter ring seated well and secured to the Camera. One should first screw him and then put on the lenses. This already is the Camera thread. Unfortunately, the lens cap does not fit on the adapter ring so that he is always so in the bag.
The intent is worth for money!