K&F Concept 37mm Slim HD Multi-Coated Variable Fader NDX Neutral Density Adjustable ND2 to ND400 Lens Filter + Microfiber Cleaning Cloth for DSLR Cameras Variable ND Filter  (37 mm)

This filter is compatible with 37mm lenses only. Not all cameras come with 37mm 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. - 37Mm 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.