K&F Concept Magnetic 1-Second Swap ND2-ND32 (1-5 Stops) Variable ND Lens Filter with 28 Multi-Layer Coatings for Camera LensK&F Concept Magnetic Variable ND Extend exposure time, never miss any wonderful moment. Try K&F Concept magnetic variable neutral density filter. ND filter reduces the amount of light entering the lens. This makes it easier to achieve effects such as a shallower depth of field or blurred motion.1-second swap, no need to screw on lens, never miss any wonderful moment.Neutral density filter support adjustable from 1 to 5 stops, via rotating the filter to control light reduction.Support the wide-angle lens with no vignetting, the front diameter is larger than the back diameter of this filter.Allows the use of slow shutter speeds, with high-speed films or digital cameras, to record movement/image blur in subjects. Decrease the depth of field by using wider apertures, which helps separate subjects from their background. Support Wide Angle Lens No-X Cross K&F Concept self-lock frame technology ( the frame will be locked while rotating the filter to the Min(ND2) or Max(ND32)) helps the wide-angle lens to avoid dark "X" cross in photos. 1-5 Stops Adjustable Variable from ND2-ND32, with 5 stops light reduction including ND2 / ND4 / ND8 / ND16 / ND32, suitable for various scenes. Reconmmend for Landscape Photography 0.3-1.5 light reduction, control the light precisely, fit most landscape photography needs, one filter than more. Ultra Slim Frame Only 7.4mm thickness, effectively avoided vignetting even on wide-angle lenses. Waterproof &Scratch Resistant Both sides with nanometer coating, waterproof and scratch-resistant, reduce the reflections coming from the filter-self, without any negative effect on the image quality.