Features:

• ND8 square filter provides 3 f-stop reductions,With only 2.3mm thickness,No Color Cast and is made with premium Germany 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.
• Nano 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 Neutral Density 4x4" /100mm*100mm, so it Compatible with Cokin Z Series for DSLR Cameras Lens.

Specification: 

• size:100*100mm
• Transmittance: 0.125
• Antireflection: Yes
• waterproof: Yes
• scratch-resistant: Yes
• HD: Yes
• Filter Material: Optical glass
• Filter Thickness: 2.0mm
• Shape: Square
• Ring Material: Optical glass

Package Included:

• 1 x K&F ND8 100*100mm 3 Stop Neutral Density Square Filter