K&F Concept 4-Pack Magnetic ND/CPL/UV / ND1000 Filter Adapter Ring Kit with 28 Multi-Layer Coatings for Camera Lens How does it help? Now switch your filters in the seconds with K&F Concept Magnetic Quick-Swap Kit. As a photographer, you know all about the waiting game: those times when utmost patience is required to capture that once-in-a-lifetime image. Every second is important to you, meanwhile, your heart is racing because you know you have just milliseconds to win your race against time or tide. K&F Concept has announced a magnetic camera filter kit system to reduce the time it takes to swap out lens filters literally in seconds, a 1 second swap, never missing any wonderful moment.