K&F Concept Black Diffusion 1/8 filter 4x5.65 inch pre Matte Box

The K&F Concept Black Diffusion 1/8 Filter is a professional-grade optical filter designed for use with standard 4x5.65 inch matte boxes. Crafted from high-definition optical glass with multi-layer nano coating, this filter softens skin tones, reduces blemishes, and adds a subtle cinematic glow to highlights while lowering overall contrast. Ideal for filmmakers and videographers seeking a dreamy, filmic look without significant light loss.

Advantages

This filter provides a delicate diffusion effect (1/8 strength) that smooths skin imperfections and creates a soft, ethereal atmosphere. The multi-layer nano coating repels water and oil, making it easy to clean and maintain. Scratch-resistant and anti-reflective, it ensures high optical clarity and durability on set.

Suitable for

• Professional filmmaking and videography
• Portrait and creative photography
• Matte box systems from Tilta, SmallRig, ARRI, and other standard 4x5.65" trays

Key specifications

• Filter Type: Black Diffusion
• Diffusion Strength: 1/8
• Filter Size: 4x5.65 inches (101.6x143.5mm)
• Material: High-Definition Optical Glass
• Coating: Multi-Layer Nano Coating (water & oil repellent, scratch resistant)
• Thickness: 4mm
• Light Loss: Approximately 1/3 Stop
• Color Shift: Neutral
• Frame: Frameless (polished glass edges)
• Mounting: Drop-in for matte box filter trays

Recommendations

For best results, pair with a compatible matte box and use in controlled lighting to achieve a consistent cinematic look. The 1/8 strength is subtle; consider stronger diffusion for more pronounced effects.