K&F Concept ND8 ND Filter 4 × 5.65″ for Matte Boxes K&F Concept

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ND8 ND Filter 4 × 5.65″ for Matte Boxes. A fixed density suits situations that repeat — long exposures of water and clouds, a blurred background in sunshine or steady light when filming.

• 28 anti-reflective layers, reflectance 0.2 %
• The surface repels water and grease and resists scratches

Standard size for matte boxes

The 4″ × 5.65″ size is the cinema standard, so the filter fits common matte boxes and filter trays. It is not screwed onto the lens but slid in front of it, which allows several filters to be stacked and swapped without touching the lens.

Easy to clean outdoors

The surface repels water and grease, so drops run off and fingerprints wipe away without smears; the coating also stands up to cleaning in the field.

A neutral density filter takes light away without touching the colours. In daylight it lets you shoot wide open with a blurred background, film at 1/50 s by the cine rule, or lengthen the exposure until water melts into mist and people vanish from the frame. The glass carries 28 anti-reflective layers and reflects only 0.2 % of the light, so no ghosting or veiling appears against the light.

• Neutral density filter — 1 pc
• Leather filter pouch — 1 pc

• Filter type: Neutral density filter
• Series: Matte Box Cinema
• Glass: Japanese AGC optical glass, titanium coating
• Coatings: 28
• Reflectance: 0.2 %
• Stops: 3 stops
• Density: ND8
• Surface treatment: water-repellent, grease- and scratch-resistant
• Dimensions: 4″ × 5.65″
• Glass thickness: 4 mm
• Note: Fits 4″ × 5.65″ matte boxes and filter holders, among them Tilta and SmallRig.