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. Features: These filters are double threaded allowing additional filters or accessories to be mounted one over the other. Extend to full length for use with a telephoto lens. Collapse midway for wide angle shots. The addition of a lens hood can help prevent flares, those circles of light that can accompany images where a strong light source is just outside the frame. Professional tulip shape design (also known as "flower" or "petal" shape) allows for greater versatility. Ultra gentle, extremely fine microfiber leaves zero scratches, streaks or marks. Safe for all lenses. UV filters protects your lens from scratches, removes fingerprints and absorbs ultra violet rays, giving sharper contrast to your video and digital images. Diminishes ghosting effect from reflected light. CPL filters removes unwanted reflections from non-metallic surfaces such as water or Increases color and contrast by redcing reflections from non-metallic surfaces by cutting through haze. Improves clarity of distant objects. Foliage is richer and the skies bluer. FLD filters allows camera use under fluorescent lighting. Gives natural light colors when under poor conditions. Specifications: Lens thread size: 52mm, 58mm (optional) Package size: 20 * 11 * 7cm / 7.9 * 4.3 * 2.8in Package weight: 198g / 7.0oz Package list: 1 * UV Filter 1 * CPL Filter 1 * FLD Filter 1 * ND Neutral Density Set (ND2, ND4, ND8) 1 * Carry Pouch 1 * Tulip Flower Lens Hood 1 * Collapsible Rubber Lens Hood 1 * Center Pinch Lens Cap 1 * Cap Keeper Leash 1 * Cleaning Cloth