KF Concept Nano-X Ultra-Low Reflection ympyräpolarisaatiosuodatin 40,5 mm

Landscape photographers working near water or glass know the struggle of unwanted reflections washing out their shots. This 40.5mm circular polarizer from KF Concept’s Nano-X series cuts through glare with an ultra-low reflection rate of less than 0.1%, letting you capture deep blue skies, rich foliage, and clear water without post-processing tricks. The slim 3.3mm frame is machined from aviation aluminum alloy, and the Japanese AGC optical glass carries 28 layers of nano-coating for exceptional clarity and durability.

Key specifications

• Filter type: Circular Polarizer (CPL)
• Diameter: 40.5 mm
• Series: Nano-X Ultra-Low Reflection
• Optical material: Japanese AGC optical glass
• Frame material: Aviation aluminum alloy
• Coatings: 28 layers (14 per side), multi-layer nano-coating
• Reflection rate: <0.1%
• Light transmittance: >99.6%
• Water, oil, and scratch resistant; anti-static
• Frame thickness: 3.3 mm (ultra-slim)
• Threading: Double-threaded (front and rear)

Why choose it

The Nano-X CPL doesn’t just reduce reflections—it enhances color saturation and contrast, giving your images a natural pop without oversaturation. The hydrophobic and oleophobic coatings repel water droplets and fingerprints, so you can keep shooting in light rain or near sea spray. The ultra-slim frame minimizes vignetting on wide-angle lenses, and the double threading lets you stack another filter or use a lens cap without removing the polarizer.

Ideal use cases

• Landscape and outdoor photography to deepen skies and cut haze
• Shooting through glass or water to eliminate distracting reflections
• Urban photography where glare from buildings and cars is common
• Travel photography when you need a durable, low-profile filter
• Any lens with a 40.5mm filter thread, including many compact and mirrorless systems

Good to know

The filter rotates to adjust the polarization effect, letting you fine-tune the amount of reflection reduction. Because it blocks some light (about 1-1.5 stops), you may need to adjust exposure slightly. The front thread accepts 40.5mm lens caps or additional filters. KF Concept includes a protective case for safe storage.