• This Hidalia Lens ND Filter Kit includes 4 filters that are compatible with Sigma 14-24mm f/2.8 DG DN Art lenses for Sony E-mount cameras or Sigma 14-24mm f/2.8 DG DN Art lenses built-in rear filter slots for Leica L-mount cameras • Each filter can be used individually to darken the entire image, allowing you to shoot at wider apertures or slower shutter speeds than normal. By increasing aperture and slowing exposure time, you can control the depth of field and transmit movement more easily • The ND 0.9, ND 1.2, ND 1.8, ND 3.0 filters in the kit provide 3, 4, 6, and 10 stops exposure reduction respectively. These filters are made of optical glass for clarity and color fidelity. Neutral density filters do not affect the color of the image and are ideal for pairing with other filters • To prevent internal ghosting and reflections, each glass surface has 10 layers of anti-reflection coating, which helps to protect the filter substrate and keep it clean for a long time. The nano-coating associated with these neutral density filters provides an additional layer that improves the beading effect when surface is exposed to water or oil and allows for more efficient cleaning • Please confirm your camera's SLR lens brand type before ordering. Your camera's lens brand type will be displayed somewhere on the lens barrel. If you have any questions about Haida products, please contact us freely