K&F Concept 40.5 mm Slim Variable Fader N-D Neutral Density Adjustable N-D2 to N-D400 Filter with Microfiber Cleaning Cloth for Sony 16-50 3N, Nikon V1 V2 10-30 Lens (Black) Variable ND Filter  (40.5 mm)

This filter is compatible with 40.5mm lenses only. Not all cameras come with 40.5mm lenses. Please verify your camera's lens thread size. Your camera's lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. - 40.5mm adjustable variable neutral density filter (nd2 - nd400) reduces the amount of light reaching the film without affecting the color. Applies slow shutter speed under strong sunlight exposure. Allows wider apertures, effectively decreasing depth of field. Great for shots of dynamic screen, waterfalls, streams, waves.