The Hoya Fusion Antistatic Professional Filter uses an antistatic coating that acts like a magnetic field in the opposite direction to keep dust and dirt away from the filter surface. Hoya Antistatic filters require far less maintenance due to their special properties. The hardened, antistatic surface also repels water and rain and can be easily and gently cleaned of dirt stains and fingerprints. This protects the glass and prevents scratching by the smallest dust and dirt particles. Hoya Fusion Antistatic Professional Filters are manufactured from hand-picked silicates. Through careful melting and complex mixing into high-quality glass components. Good workmanship and high-quality materials guarantee the constant Hoya quality. The antistatic effect is achieved by a special 9-layer Super Multi-Coating formula, which also greatly reduces reflections without impairing light transmission. The flat aluminium filter frame is constructed in two parts and prevents vignetting. This makes the filter perfect for use with wide-angle lenses.