K&F Concept’s Magnetic Lens Filter Kit, which includes a UV filter, a circular polarizer, and a neutral density filter, along with an adapter ring, is a good concept that isn’t quite executed correctly.The idea behind a magnetic lens filter kit is a good one, as it’s never fun to fumble around changing filters when you are trying to get a photo, especially if you are hiking and not in a position to lay down the camera on a clean surface and carefully remove and replace filters.I tested this kit with the Nikkor Z 24mm-200mm lens, which takes 67mm filters, and removed the existing UV filter I had on the camera. The adapter screws on fine, but now with the K&F Concept adapter on the lens, the lens cap falls off easily. The situation improved slightly with the addition of the K&F circular polarizer on the adapter, but the cap still did not stay in place.I even tried keeping my original UV filter on the lens, along with the adapter and then the circular polarizer, and the situation did improve a bit, but I don’t like having a double layer of glass in front of the lens element. I also tried the adapter with an F mount lens with a 67mm diameter, and the result was a little better as F mount lenses have different lens caps.The filters themselves work well and seem to be of good quality. Included with this review is a photo taken with the circular polarizer. The filters themselves are very thin, which is perhaps why the lens cap does not stay on, and the movement of the circular polarizer is smooth. The filters come with a nice carrying case as well.Bottom line, I like the concept of magnetic filters, but, at least with the Z mount 24mm-200mm lens, the adapter and filters are too shallow for the lens cap.