K&F Concept Nano-X Series 2-in-1 Variable ND & CPL Filter 77mm, 2 to 6-Stop (KF01.1917)

The K&F Concept Nano-X Series 2-in-1 Filter 77mm stacks a variable ND and a circular polarizer into one piece of glass. You control exposure and reflections at the same time without screwing two filters together and risking vignetting on a wide lens.

The two layers rotate independently, so you can set the polarizer to kill the glare off water, glass or foliage, then dial the density — ND4 to ND64, 2 to 6 stops — until your shutter and aperture land where you want them.

Engineered without the black cross across the usable range, with 28-layer green coating, HD, waterproof and scratch resistant. Threads onto professional f/2.8 zooms.