K&F 77MM,Nano-X, optical glass, soft gradient GND16 K&F Concept

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The K&F Concept 77mm Nano-X Soft Gradient GND16 Filter is designed to balance exposure between bright skies and darker foregrounds in high-contrast outdoor scenes. Built with premium Japanese optical glass, Nano-X multi-coatings, and an ultra-thin aviation-aluminum frame, it delivers ultra-clear, vignette-free performance for landscape photography.

The K&F Concept 77mm Nano-X Soft Gradient GND16 Filter is an essential tool for landscape photographers who frequently encounter scenes with extreme brightness differences between the sky and the ground. Due to the limited dynamic range of camera sensors, exposing correctly for the sky often causes the ground to turn dark and underexposed, while exposing for the ground results in a washed-out, overexposed sky.

This soft gradient filter solves that problem by providing a smooth transition from transparent to gray, darkening only the bright portion of the frame—typically the sky. This helps balance the light ratio, reduce overexposed highlights, and retain details in both the foreground and sky, making it ideal for sunrise, sunset, seascapes, mountains, and other high-contrast environments.

The filter is constructed from top-tier Japanese optical glass with precision grinding and double-sided polishing to maintain molecular stability and ensure extremely sharp, high-resolution imaging—even when paired with telephoto lenses. A Nano-X multi-layer coating protects the surface against mold, water, scratches, and oil, all while maintaining maximum clarity. Contaminants can be wiped off easily without leaving smudges.

The aviation-grade aluminum frame is only 5.3mm thick and features a CNC-machined trapezoidal grip pattern, allowing easy rotation and secure handling in any shooting scenario. Thanks to its ultra-thin design, the filter prevents vignetting at both wide-angle and telephoto focal lengths.

With uniform gradient coating, precise optical density, and stable color reproduction, this GND16 filter delivers consistent, professional-grade results.

Key Features:

• Soft Gradient GND16 Filter balances exposure between bright skies and darker foregrounds
• 4-Stop (1.2) Light Reduction with 6.25% transmittance and 1.5% reflectivity
• Premium Japanese Optical Glass for superior clarity and sharpness
• Precision Grinding & Double-Sided Polishing ensures HD imaging with zero loss of detail
• Nano-X Multi-Layer Coating: moldproof, waterproof, anti-scratch, anti-grease
• Ultra-Slim 5.3mm Aviation-Grade Aluminum Frame eliminates vignetting at any focal length
• CNC Trapezoidal Grip for easy rotation and attachment/removal
• Uniform & Stable Gradient Coating for accurate dimming and precise color performance

• 1 × K&F Concept 77mm Nano-X Soft Gradient GND16 Filter
• 1 × Protective storage case (if included)

• Filter Size: 77mm
• Filter Type: Soft Gradient GND16
• Optical Density: 1.2 (4 stops)
• Transmittance: 6.25%
• Reflectivity: 1.5%
• Material: High-grade Japanese optical glass
• Coating: Nano-X waterproof, anti-scratch, anti-oil, moldproof
• Frame Material: Aviation-grade aluminum
• Frame Thickness: 5.3mm
• Use Case: Landscape photography, high-contrast lighting conditions