K&F 77mm Ultra-Low Reflection Variable ND Lens Filter, ND2-400 K&F Concept

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Nano-X — variable ND filter 77 mm, changes the amount of light steplessly as you turn it.

• 28 anti-reflective layers, reflectance 0.1 %
• Screws onto a lens with a 77 mm thread.
• The surface repels water and grease and resists scratches

A variable ND replaces a whole set of fixed grey filters — turning the front ring changes how much light gets through, steplessly. While filming the shutter stays at 1/50 s even as the sun goes behind a cloud and comes back, with no need to stop the take or swap a filter.

The glass carries 28 anti-reflective layers and reflects only 0.1 % of the light, so no ghosting or veiling appears against the light.

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.

• Variable ND filter 77 mm — 1 pc

• Filter type: Variable ND filter
• Series: Nano-X
• Thread size: 77 mm
• Glass: optical glass
• Coatings: 28
• Reflectance: 0.1 %
• Frame: aluminium alloy with end stops
• ND range: ND2 – ND400
• Stops: 1–9 stops
• Surface treatment: water-repellent, grease- and scratch-resistant