Good concept, but poor color reproduction of it available Graufilter

I have long been looking for a filter solution for the Nikon 14-24 and then opted for the Lucroit solution, because I liked the mounting and there is a wide filter selection. Of course, the filter holder is only useful in conjunction with an appropriate Lucroit adapter. (See for my local review)

The adapter is simply snapped onto the adapter, but sits a little bit too tight because it can be very difficult to turn.

Conclusion:
+ Easy installation
+ Large filter selection
+ No vignetting at the Nikon 14-24
- Rotation very sluggish
- No pole filter available
- Very poor color reproduction of the available gray filter