K&F Concept B-Series variable ND filter ND2–ND400 55 mm K&F Concept

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B-Series — variable ND filter 55 mm, changes the amount of light steplessly as you turn it. It is a favourite for filming on bright days, as it lets you keep a cinematic shutter and a wide aperture without blown highlights or swapping filters between takes.

• Screws onto a lens with a 55 mm thread.

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.

• Variable ND filter 55 mm — 1 pc
• Plastic case — 1 pc

• Filter type: Variable ND filter
• Series: B-Series
• Thread size: 55 mm
• Glass: optical glass
• Frame: aluminium alloy
• ND range: ND2 – ND400
• Stops: 1–9 stops