55mm ND Filter, K&F Concept 55mm Lens Filter ND2 ND4 ND8 Neutral Density ND Filters Kit Compatible with Digital DSLR Camera + Cleaning Cloth + Filter Pouch Made of import optics resin,top level of transmittance. Metal sealing ring instead of the plastic sealing ring, better tightness, avoids fall or loose.Extinction paint seiko manufacturing,To achieve the testing sights on military standard ND filters (Neutral Density) reduce the amount of light reaching the film without affecting the color. Can be used to enable slower shutter speeds. Also can be used to better separate subjects from the background by allowing wider apertures, effectively decreasing depth of field. Great for portraiture and outdoor scenes. This is an especially useful tool when creating motion blur in moving water such as waterfalls, rivers and crashing waves. Other examples of good times to use very slow shutter speeds to create blur are; moving vehicles, trains, cars and congested city traffic; blurred panning effects where the subject, a runner, bicyclist or car is clear but the background around it is blurred from the camera following its movement Ideal for Wide Angle Lenses. Double threaded metal frame for additional filters or Hood. Compatible with Sony Alpha(A99, A77, A58, A57, A65, A55, A 390, A100, A33, A900, A850, A700, A500 A330, A300 A230, A200) DSLR cameras with 18-55mm, 75-300mm f/4.5-5.6, 50mm f/1.4 lenses.