+ Knotless processing;
+ The thread is flawless and can be screwed "smooth as silk"
+ Option of Aufschraubends additional filter to this filter
+ Nikon lens cap fits perfectly
+ Made in Japan
+ No detectable loss of quality (ie, at least as a hobby)
+ Very good value for money
- So far nothing
In direct comparison with the twice as expensive original Nikon NC filter no distinguishable can be determined. Therefore experiences of these filters, given the far lower price of my total purchase recommendation.
With appropriate cleaning cloth can be, in my experience, the filter also easily cleaned.