MTF Lens Reviews: 20-50mm and most others
In case it may interest anyone, since I didn't find any on this site, I found a lens evaluation on the Samsung NX 20-50mm kit lens
http://www.photozone.de/samsungnx/697_samsungnx1855f3556?start=1 (in case anyone's browser should have problems with embedded links)
Photozone.de has evaluations of MANY lenses. Here is the one for the other Samsung lenses:
You'll find lens reviews for the 16mm, 20mm, 30mm, 20-50mm, 18-55mm, 18-200mm, 60mm, 85mm. Unfortunately, the 45s aren't tested yet.
Note: The only thing that bothers me about the review of the 18-55mm, is that there is no data available for how this lens performs at 20mm and at 50mm, so it can be directly compared to the 20-50mm lens, if one is undecided between the two. Most lenses don't do as well at the extremes, their minimum and maximum zoom, with their sweet spot somewhere in-between. The 18-55mm doesn't look as good as the 20-50mm in the numbers, but it may be much better if you get away, just a little bit, from the 18 and 55mm.
Photozone.de tests two samples of every lens.