The K&F Concept Variable ND Magnetic Filter is a game-changer in the world of photography, reducing the amount of light entering the lens. This feature allows you to effortlessly achieve desired effects such as a shallower depth of field or motion blur. With its 1-second interchangeability, there is no need to screw on your lens, ensuring you never miss a perfect shot. This neutral density filter offers adjustable light reduction from 1 to 5 stops, controlled by simply rotating the filter. It is designed to support wide-angle lenses without vignetting, thanks to its unique design where the front diameter is larger than the back diameter. The filter allows the use of slow shutter speeds with high-speed film or digital cameras, allowing you to record motion or image blur in subjects. It also helps to decrease depth of field through the use of wider apertures, effectively separating subjects from their background. K&F Concept lens filter features self-locking frame technology, which locks the frame while you rotate the filter to the minimum (ND2) or maximum (ND32). This feature helps wide-angle lenses avoid the dark "X" cross in photos, ensuring a flawless image every time.