ND64 square filter provides 6 f-stop reductions, With only 2.3mm thickness, No Color Cast, and is made with premium Japanese Optics glass.
* Double Thread,20-layer multi-resistant coating technology significantly reducing lens flare and ghosting while making the filter anti-scratch, water repellent, oil & dust resistant fit for the rigors of adventure photography.
* Multi Layer Coating with metallic alloy film on both sides of clear glass - this coating process produces a true neutral image, free from infrared contamination (flat curve).
* Eliminates overly bright & washed-out images and enables longer exposures to capture the beauty of time and movement.
* K&F Concept SN50 Neutral Density 4x4" /100mm*100mm, so it Compatible with Cokin Z Series for DSLR Cameras Lens.