K&F Concept 55mm XV40 Nano-X Variable ND Filter (ND8–ND128) – Professional-grade variable neutral density filter made with premium imported AGC optical glass. Offers smooth 3–7 stop light reduction with no "X" cross, no color cast, and uncompromised sharpness. Features 34-layer Nano-X coating, waterproof and scratch-resistant surface, and a 7.4mm ultra-slim CNC frame for zero vignetting. The K&F Concept 55mm XV40 Nano-X Variable ND Filter (ND8–ND128) is designed for photographers and filmmakers seeking precise exposure control in a compact, high-quality filter. Built with imported Japanese AGC optical glass, this filter delivers unmatched image clarity, color fidelity, and contrast — without any color cast or image degradation.The advanced self-lock frame design completely eliminates the unwanted "X" cross pattern commonly found in variable ND filters, ensuring smooth and consistent results across wide-angle and telephoto lenses alike.Featuring 34 layers of Nano-X multi-resistant coating, the filter repels water, oil, and dust, while providing superior protection against scratches and reflections. This ensures clean, vivid, and high-contrast images in any shooting environment — from bright daylight to cinematic low-light scenes.The ultra-slim 7.4mm CNC aluminum frame minimizes vignetting (supports down to 34mm focal length) and provides a precise, non-slip grip for effortless installation and removal. This ND filter is perfect for long-exposure photography, video shooting, and achieving cinematic motion blur under bright lighting conditions.Key Features:3–7 Stops Light Reduction (ND8–ND128) – Ideal for shooting in bright environments and creating motion blur or shallow depth-of-field effects.Imported AGC Optical Glass – Delivers exceptional clarity and true-to-life color reproduction.No "X" Cross Pattern – Innovative self-lock frame eliminates the common cross effect found in variable ND filters.34-Layer Nano-X Coating – Waterproof, oil-resistant, anti-glare, and scratch-proof for long-lasting performance.Ultra-Slim 7.4mm Frame – Prevents vignetting on wide-angle lenses (supports up to 34mm focal length).CNC Precision Frame – Non-slip design for easy installation and removal.Universal 55mm Fit – Compatible with all 55mm thread lenses; use 58mm caps/hoods for this filter.Specifications:Filter Type: Variable ND (ND8–ND128)Light Reduction: 3–7 StopsGlass Material: Japanese AGC Optical GlassCoating: 34-Layer Nano-X Multi-ResistantFrame Material: CNC Aluminum AlloyFrame Thickness: 7.4mmThread Size: 55mmRecommended Lens Cap Size: 58mmWater / Oil / Scratch Resistance: YesAnti-Reflection: YesPackage Includes:1 × K&F Concept 55mm XV40 Nano-X Variable ND Filter (ND8–ND128)1 × Protective Storage Case