I was surprised how well the very thin filter handle (unscrew to / and rotate) can. But the best is that he does not vignetting on my Nikkor 16-35mm / f4 lens at a full frame camera (D800) also at maximum aperture!
There can be no second filter screw (a rather theoretical requirement), as it has no external thread because of the thinness like all slim filter. But the front original Nikon snap cap (LC-77) can be inserted in a diligent yet been set up (which is rather not recommended for anything rubusteren use conditions).
The optical quality appears to be perfectly at first glance, what can be expected from Cokin also.
