K&F Concept Black Diffusion 1/4 filter 77 mm Nano-X

The K&F Concept Black Diffusion 1/4 Filter is a professional-grade optical filter designed to soften skin blemishes, reduce contrast, and create a cinematic glow in portrait photography and videography. With a 1/4 diffusion strength, it delivers a subtle dreamy effect while maintaining sharpness. The 77mm diameter fits lenses with a 77mm filter thread.

Advantages

This filter uses Japanese AGC optical glass and 28-layer nano-coating technology to ensure high light transmission (84%), waterproof, oil-proof, scratch-resistant, and anti-reflection properties. The ultra-slim 3.3mm aviation aluminum alloy frame prevents vignetting on wide-angle lenses.

Suitable for

• Portrait photography
• Videography and filmmaking
• Cinematic effects
• Lenses with 77mm filter thread

Key specifications

• Filter Type: Black Diffusion
• Filter Strength: 1/4
• Filter Diameter: 77 mm
• Light Transmission: 84%
• Coating: 28-Layer Nano-Coating
• Glass Material: Japanese AGC Optical Glass
• Frame Material: Aviation Aluminum Alloy
• Frame Thickness: 3.3 mm
• Color Shift: Neutral
• Waterproof, Oil-Proof, Scratch-Resistant, Anti-Reflection

Recommendations

For best results, use with lenses that have a 77mm filter thread. The filter is ideal for creating soft, cinematic looks without post-processing.