• - Graduated ND8(0.9) 3 stops filter made of Germany top optical galss,increased optical clarity and color fidelity.
• - Nano coating layer technology，waterproof, scratch-resistant, anti-reflective green coating, effectively prevent from oil, fingerprint, scratch, protect valued lens.

• - K&F neutral density adopts exclusive research and development gradual coating, the light from ultra violet to near-infrared light can pass through evenly.
• - Double sides optical grinding and polishing to make sure the optical high parallelism and smooth to ensure the high sharpness of image
• - Reduce Exposure in Selective Area (the light is big different between the ground and sky),It could fit to Lee Filter Holder and Cokin's Z Series Filter holder.