K&F Concept 55MM ND2-ND400 Variable Filter

The K&F Concept 55mm ND2-ND400 Variable ND Filter offers smooth 19 stop light reduction for long-exposure photography and cinematic motion effects. Built with HD AGC optical glass and 24-layer nano-coating, it provides superior clarity, reduced reflections, and durable protection in an ultra-slim, wide-angle-friendly frame.

The K&F Concept 55mm ND2-ND400 Variable Neutral Density Filter is engineered for photographers and videographers who need flexible exposure control in shifting outdoor lighting conditions. With a wide 19 stop adjustment range, this filter allows you to achieve stunning long-exposure shots like soft flowing water, streaking clouds, or dynamic motion blur while also enabling bright-light video recording without overexposure.

Constructed from premium HD AGC optical glass, this Nano-D series filter features 24 layers of advanced nano-coating that deliver excellent scratch resistance, reduced glare, water and oil repellency, and improved color fidelity. Its 7.4mm ultra-slim aluminum alloy frame is specially designed for wide-angle lenses to minimize vignetting, while the CNC-machined trapezoidal texture provides superior grip and smooth rotational control.

A potential black X pattern may appear at extreme ND settings depending on lens focal length—an inherent characteristic of adjustable ND filters—but it resolves naturally with continued rotation. Designed to fit all 55mm thread lenses, this variable ND filter offers professional performance for landscapes, travel photography, filmmaking, and outdoor creative work.

Key Features

• Adjustable ND2-ND400 (19 stops) for creative exposure control
• HD AGC optical glass with 24-layer nano-coating
• Water-, oil-, dust-, and scratch-resistant coatings
• Ultra-slim 7.4mm aluminum frame for minimal vignetting
• CNC trapezoidal grip ring for smooth, accurate adjustments
• Preserves true-to-life color with no unwanted color shift
• Ideal for long-exposure photography and cinematic video

• 1 55mm ND2-ND400 Variable ND Filter
• 1 Protective Storage Case

• Filter Type Variable Neutral Density (ND2-ND400)
• Stops 19 stops
• Glass Material HD AGC optical glass
• Coating 24-layer nano-coating
• Frame Material Aluminum alloy
• Frame Thickness 7.4mm (ultra-thin)
• Compatibility Fits 55mm filter-thread lenses