The K&F Concept filter is a circular CPL polarizing filter with adjustable ND2–ND32, covering a range of 1 to 5 f-stops. The adjustment does not create the “X” effect in photos or videos. Japanese AGC glass with 18 layers of NANO C coating and multilayer HMC anti-reflective coatings reduces light reflections.

The protective coating makes it scratch- and impact-resistant, water-repellent and resistant to dirt and dust, while also making it easier to clean. It does not adversely affect autofocus or image color. The frame is made of black electroplated aluminum, and the filter comes with a plastic storage case.

• Type: CPL polarizing and adjustable ND
• Diameter: 52 mm
• Adjustment range: ND2–ND32, 1 to 5 f-stops
• Glass: Japanese AGC Ultra HD
• Coatings: 18 layers of NANO C coating and multilayer HMC anti-reflective coatings
• Resistance: To scratches, impact, dirt and dust
• Water repellency: Hydrophobic protective coating
• Frame thickness: 9.3 mm
• Frame material: Black electroplated aluminum
• Compatibility: Lenses with a 52 mm filter thread
• Package contents: Filter, plastic storage case