Comments about Cokin Cokin Universal Adapter for X-Pro System:

I bought this for use with the x pro filter holder to use on my Nikon 14-24mm lens. I have used it numerous times and it generally works well. The screws that lock the unit onto the outside of the lens have quite loose fitting threads and have plastic tips so as to not scratch the outside of the lens. They work and the unit tightens firmly but how long they last is another question? Light entering the system via the gap at the rear is a problem in many situations however its easy to overcome. I usually pack the gap with soft foam or just throw a hand towel around. Overall it's a decent product.

Comments about Cokin Cokin Universal Adapter for X-Pro System:

Attaches with 4 set screws. Screws have plastic tips to prevent scratches on lens. Works well on Canon 14 mm with X-Pro gradient filters without vignetting and in any orientation on a FF camera. Attach filter holder to adapter, place filter in farthest slot on filter holder, and then attach entire assembly to lens, with filter as close to the lens as possible (barely touching the hood). Tighten the set screws lightly so that assembly is centered on lens. A somewhat loose fit is ok, it won't come off the lens.