Camera Filter K&F Concept Filter Nano-X 37 mm KF01.1162V1 UV Protection

K&F Concept Nano-X 37mm ND2-ND32 XV38 filter is a variable neutral density filter designed for 37 mm lenses. It reduces incoming light from ND2 to ND32, helping to create motion blur effects and enabling longer exposures when photographing rivers, waterfalls and other dynamic subjects. The filter features a compact metal frame and requires a 40.5 mm lens hood.

Advantages

The filter uses high-quality AGC optical glass with high light transmission and a multi-layer nano coating system. Twenty-eight nano-coatings provide resistance to water, scratches and flare, while the non-slip frame makes mounting and removal easier. The Nano-X design is engineered to prevent the X-effect that can appear when rotating variable ND elements cross each other.

Key specifications

• Manufacturer: K&F Concept
• Model: KF01.1162V1
• Type: Variable ND (ND2–ND32)
• Diameter: 37 mm
• Thickness: 7.4 mm
• Lens hood thread recommendation: 40.5 mm

How to use

Attach the filter to a 37 mm threaded lens and rotate the outer ring to adjust the density between ND2 and ND32. Use lower settings (closer to ND2) for minor light reduction and higher settings (toward ND32) for longer exposures or stronger motion blur. Verify framing and focus before long exposures and use a tripod when longer shutter speeds are required.

Recommendations

For best results, combine the K&F Concept Nano-X 37mm ND2-ND32 filter with a sturdy tripod and remote shutter or timer. Avoid stacking multiple variable ND filters to reduce the risk of the X-effect and vignetting.