K&F Concept 3-in-1 Multi-Functional Filter: Variable ND2-32, CPL, and 1/4 Black Diffusion

Elevate your photography and videography with the ultimate all-in-one optical solution. This K&F Concept professional filter combines three essential creative effects—variable neutral density, circular polarization, and black mist diffusion—into a single, high-performance glass element. Designed for creators who demand versatility without the bulk of multiple filters, it allows you to master light, eliminate glare, and add a cinematic glow to your shots simultaneously.

Key Benefits

Innovative 3-in-1 Versatility:** This hybrid design seamlessly integrates a Variable ND2-32, a CPL (Circular Polarizer), and a 1/4 Black Diffusion filter. By combining these functions, it eliminates the need for stacking multiple filters, which significantly reduces the risk of vignetting and simplifies your gear setup.

Precise 1–5 Stop Light Control:** Featuring a precision light attenuation system, the filter provides a range from ND2 to ND32. Whether you are capturing silky waterfalls with long exposures or maintaining a wide aperture in harsh sunlight, you have total control over your exposure levels.

Cinematic Black Mist Effect:** The built-in 1/4 strength Black Diffusion softens highlights and subtly lowers contrast. This creates a dreamlike, cinematic atmosphere and smoother skin tones while maintaining impressive sharpness in the shadows.

Vivid Color and Reflection Control:** The integrated CPL function allows you to remove unwanted reflections from non-metallic surfaces like water or glass. It simultaneously boosts color saturation and contrast, making skies bluer and foliage more vibrant.

Ultra-High Definition Optics:** Utilizing a double-sided grinding and polishing process, this filter ensures lossless sharpness across the frame. It is engineered to complement high-resolution sensors, ensuring your images remain crisp and detailed.

Advanced 28-Layer Nano-Coating:** The glass is treated with 28 layers of nano-crystalline coating, making it highly resistant to water, oil, and scratches. This "armor-like" protection ensures the filter performs reliably in challenging outdoor environments.

Key Specs

Filter Type:** 3-in-1 Multi-Functional (VND + CPL + Black Diffusion)

ND Range:** ND2 to ND32 (Adjustable 1–5 stops)

Diffusion Strength:** 1/4 Black Mist

Frame Material:** Aviation-grade aluminum alloy

Coating:** 28-layer multi-functional nano-coating

Optical Feature:** Double-sided grinding and polishing for HD clarity

How to Use

1. Thread the filter onto your lens by rotating it clockwise until secure.

2. **To adjust exposure:** Rotate the outer ring to cycle through the ND2 to ND32 settings (1 to 5 stops) until you reach your desired brightness.

3. **To manage reflections:** Rotate the filter frame to engage the CPL function, observing the change in glare and color saturation through your viewfinder or screen.

4. The Black Diffusion effect is constant and requires no adjustment; it will automatically soften highlights in your composition.

5. When finished, ensure the filter is clean before replacing your lens cap or storing it.

Care & Safety

Store the filter in a dedicated protective case when not in use to prevent dust accumulation.

Clean the glass only with a professional microfiber cloth or lens blower to preserve the integrity of the 28-layer coating.

Avoid touching the glass surface with bare fingers to prevent oil transfer.

Keep the filter away from extreme heat sources to protect the polarizing film.

Notes

This professional-grade optic features "28层纳米结晶镀膜" to provide maximum durability and light transmission.