[davidmanze]

Indeed. The Yongnuo 50mm f1.8 is a BAD copy of the Canon EF 50mm f1.8 II. And the Yongnuo 35mm f2 is a BAD copy of the Canon EF 35mm f2. Same optics recipe, worse optical element fabrication.

I did see a video where the guy stripped down both lenses and found some optical as well as mechanical differences, he concluded that the optical design was different enough to not been a exact copy, for what that's worth.

 Needless to say I now can't find it!.......

.Edit ...Well I've found this video from Digirev TV.......

 

https://www.youtube.com/watch?v=hSRtxcxJ8TI

 

   Kai finds the Yongnuo a Canon clone generally....mechanically and optically it's poorer than the Canon!

 

.....it's only plus is the better diaphragm...

 

   Better to get the Canon S/H IMHO............or in my case the Nikor AD50mm F1.8D........paid €40 for mine,

 

  Yongnuo is good for flashguns.