K&F Concept 37mm 3-in-1 Hybrid Filter: Variable ND2-32 + CPL + Black Diffusion 1/4

The K&F Concept 37mm 3-in-1 Hybrid Filter combines a Variable Neutral Density (ND2-32) filter, a Circular Polarizer (CPL), and a Black Diffusion 1/4 filter into a single, ultra-slim frame. This innovative design allows photographers and videographers to control exposure, reduce glare, and add a cinematic softness to their images without swapping filters. Crafted with high-definition optical glass and multi-layer nano-coating, it offers water-repellent, oil-resistant, scratch-resistant, and anti-reflective properties. The aviation-grade aluminum alloy frame ensures durability while maintaining a lightweight profile. Ideal for lenses with a 37mm filter thread, this filter is perfect for achieving professional-quality results in various lighting conditions.

Advantages

This hybrid filter simplifies your gear by combining three essential filters into one. The variable ND function allows seamless adjustment from 1 to 5 stops of light reduction, enabling smooth exposure control even in bright environments. The CPL effectively reduces reflections and enhances color saturation, making skies bluer and foliage greener. The Black Diffusion 1/4 softens highlights and reduces contrast, adding a dreamy, cinematic look to your photos and videos. The multi-layer nano-coating protects the glass from dust, water, and scratches, ensuring long-lasting performance.

Suitable for

• Photographers and videographers using lenses with a 37mm filter thread
• Landscape, portrait, and travel photography
• Video production requiring variable ND for exposure control
• Creative projects needing a soft, cinematic effect

Key specifications

• Filter Type: Hybrid (Variable ND, CPL, Black Diffusion)
• Filter Diameter: 37mm
• Variable ND Range: ND2 to ND32 (1 to 5 Stops)
• Polarizer Type: Circular Polarizer (CPL)
• Diffusion Effect: Black Diffusion 1/4
• Optical Material: High-Definition Optical Glass
• Coating: Multi-Layer Nano-Coating (Water-Repellent, Oil-Resistant, Scratch-Resistant, Anti-Reflective)
• Frame Material: Aviation-Grade Aluminum Alloy
• Frame Profile: Ultra-Slim Frame
• Rotation: 360° Rotatable Frame

Recommendations

For best results, use this filter with lenses that have a 37mm filter thread. Ensure the filter is securely attached to avoid vignetting. The variable ND function is ideal for controlling depth of field in bright conditions, while the CPL and diffusion effects can be combined for unique creative outcomes. Clean the filter with a microfiber cloth to maintain its optical clarity.