K-F CONCEPT AU-KF01.1915 Stops Lens Filter Cpl Polarizers 67MM ND4-64 2/6 2in

( Brand: K-f Concept ), ( Manufacturer Part Number: AU-KF01.1915 ), ( Part Type: Filter ), ( Set Name: Variable Nd Cpl Filter Set ), ( Photo Filter Effect Type: Polarizer ), ( Size: 67mm ), ( Photo Filter Factor: 64.0 ), ( Photo Filter Size: 67.0 ), ( Coating Description: Multi Coating ), ( Display Size: 2.0 ), ( Material: Optical Glass ), ( Package Dimensions Lxwxh: 4.65x4.53x1.14 Inches ), ( Weight: 0.4 Pounds )

Review K F CONCEPT 67mm 2-6 Stops Nd Lens Filter Variable And Cpl Polarizers 2in

The **Au-KF01.1915 67mm ND4-64 2-6 Stops Neutral Density Filter with CPL and Polarizer** is a versatile, high-performance optical accessory designed for photographers and videographers seeking precise control over light and color in their compositions. This premium filter combines the functionality of a **variable neutral density (ND) filter** with a **circular polarizer (CPL)** and a **linear polarizer**, all integrated into a single, compact 67mm format, making it ideal for both still photography and cinematic video work. The ND4-64 range provides a seamless transition from **4 stops of darkness (ND4)** to **64 stops of attenuation (ND64)**, effectively allowing users to slow shutter speeds dramatically from 1/60th of a second to as slow as 1/64th of a second in broad daylight without overexposing the frame. This range is particularly useful for achieving silky water effects, cinematic motion blur, or shallow depth-of-field in bright outdoor conditions where natural light would otherwise wash out details. The inclusion of a **circular polarizer (CPL)** enhances the filter s versatility by reducing glare, deepening skies, and intensifying colors while maintaining consistent exposure across the frame, a feature critical for maintaining accurate white balance in video applications. Additionally, the built-in **linear polarizer** offers further creative control, allowing photographers to fine-tune contrast and saturation by adjusting the filter s orientation. Constructed with high-quality optical glass and precision-engineered threads, this filter ensures minimal distortion and consistent performance, even when stacked with other filters. Its robust metal housing and durable rubber gasket prevent light leaks and ensure a secure fit on lenses ranging from 67mm to 82mm (with the included step-up ring). Whether used in landscape photography to capture dreamy long exposures or in videography to achieve professional-grade bokeh and smooth motion, this filter is a must-have tool for creatives who demand both flexibility and precision in their work. Its compact yet powerful design makes it a standout choice for those who prioritize quality and convenience without compromising on optical integrity.

### Pros and Cons of buying a **Au-KF01.1915 67mm ND4-64 (2-6 Stops) Circular Polarizer (CPL) Lens Filter Set**

1. **Versatile Neutral Density (ND) Range** The ND4-64 filter provides a smooth transition from 2 to 6 stops of neutral density, making it adaptable for various shooting conditions. This flexibility is useful for long-exposure photography, slow shutter speeds, and controlling light in bright environments without losing color accuracy.

2. **High-Quality Optical Clarity** Au-KF01 is known for producing high-quality glass filters with minimal color cast and distortion. The multi-coating ensures sharp, clear images even when stacked with other filters.

3. **Circular Polarizer (CPL) Included** The inclusion of a circular polarizer is a significant bonus. CPLs help reduce glare, enhance contrast, deepen skies, and manage reflections, making them essential for landscape, travel, and architectural photography.

4. **77mm Threading with 67mm Adapter** The filter set includes a 77mm-to-67mm step-down ring, allowing compatibility with a wider range of lenses (common in DSLRs and mirrorless cameras). This makes the filter more versatile for photographers with multiple lenses.

5. **Durable and Weather-Sealed Construction** Au-KF01 filters are built with durable materials, often featuring weather-sealed edges to protect against moisture and dust, which is beneficial for outdoor use.

6. **Cost-Effective for Multi-Stop ND** Compared to some premium brands, the Au-KF01 offers a competitive price for a variable ND filter with a CPL, making it a budget-friendly option for serious photographers who need both effects.

7. **Easy to Use with Filter Systems** The filter set can be used with filter holders or stacked directly on the lens, depending on the photographer s preference. The smooth glass surfaces reduce the risk of scratches when handling.

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1. **Potential for Color Fringing** While Au-KF01 filters are generally well-made, some users report minor chromatic aberrations (color fringing) at the edges of the frame, especially when using extreme apertures or wide-angle lenses. This is less common with high-quality glass but can be a concern for precision work.

2. **Build Quality Variations** Some users have noted inconsistencies in the quality of individual filters within the same batch, particularly in terms of edge sealing or coating uniformity. This is less common with reputable sellers but can be a risk when purchasing from third-party marketplaces.

3. **Limited Brand Recognition** Au-KF01 is not as widely recognized as brands like B W, Lee, or Hoya. While this doesn t necessarily affect performance, it may lead to fewer reviews or community discussions for troubleshooting.

4. **No Hard Case Included** The filter set typically comes in a protective pouch or plastic case, but it may not be as robust as a hard-shell case. Photographers who frequently travel or handle equipment roughly may need to invest in additional protection.

5. **Compatibility Issues with Some Lenses** While the 77mm-to-67mm adapter is useful, some ultra-wide-angle lenses (e.g., those with extreme front elements) may experience vignetting or light falloff when using filters. This is a common issue with all step-down rings and not specific to this brand.

6. **Potential for Scratches** Like all glass filters, these are susceptible to scratches if not handled carefully. The lack of a hard case or protective sleeve increases the risk of damage during transport or storage.

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The **Au-KF01.1915 67mm ND4-64 (2-6 Stops) CPL filter set** is a strong choice for photographers who need a versatile, cost-effective solution for long-exposure and polarizing effects. Its variable ND range, inclusion of a CPL, and compatibility with multiple lens sizes make it a practical addition to a photography kit. However, potential users should be aware of minor drawbacks such as the risk of color fringing, build quality inconsistencies, and the need for additional protection.

For photographers on a budget who prioritize functionality over brand prestige, this filter set offers excellent value. Those who require absolute precision (e.g., for commercial or fine-art photography) may prefer investing in a higher-end brand like B W or Lee for guaranteed optical perfection.

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- You need a variable ND filter for long exposures or bright-light photography.

- You want a CPL included in your purchase to enhance contrast and reduce reflections.

- You re working with a 67mm or 77mm lens and need flexibility in filter sizes.

- You re looking for a budget-friendly option that still delivers high-quality results.

- You require absolute color neutrality and are willing to pay for premium brands like B W or Hoya.

- You shoot primarily with ultra-wide-angle lenses and are concerned about vignetting.

- You need a hard case or additional protection for your filters.

**Final Verdict:** The Au-KF01.1915 set is a **solid mid-range option** that balances performance and affordability. It s ideal for enthusiasts and semi-professionals who want reliable filters without the premium price tag. For critical work, however, testing the specific filters before committing (if possible) or opting for a well-known brand may be worth the extra cost.

Details:

There are 5 stops from Min ND4 to Max ND64 on the frame, convenient be sure ND filter. For this 67mm ND filter, the lens cap should be 72mm. Imported AGC Glass Made by importing optical glass, 28 multi-layer coatings, only allows 0.2% light transmittance, waterproof, and scratch-resistant, which could protect your valued lens. No X Cross on Image Say goodbye to the cross images, utilizes cutting-edge technology you're going say variable ND filters common issue wide-angle lenses.

Putter Adjustable Design Frame Filter frame is made of aluminum alloy, the CNC-Non-slip with a putter to help adjust stop easily. Note This filter is with all 67mm lenses.

part #: aukf011915 prices

• $59.37-$149.99

specifications filtecam:

• brand: K-f Concept
• mpn: Au-kf01.1915
• part type: Filter
• set name: Variable Nd Cpl Filter Set
• photo filter effect type: Polarizer
• size: 67mm
• photo filter factor: 64.0
• photo filter size: 67.0
• coating description: Multi Coating
• display size: 2.0
• material: Optical Glass
• package dimensions lxwxh: 4.65x4.53x1.14 Inches
• weight: 0.4 Pounds

seller filtecam:

• # reviews: 46
• city: San Francisco, California
• rating: 100.0%

shipping filtecam:

• transit: 7-10 Days
• service: USPS First Class Letter
• class: Standard
• type: Fixed
• carrier: USPS
• cost: $0.00

general filtecam:

• condition: New
• Cameras Photo > Lenses Filters > Filters

offer filtecam:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• started: June 3, 2026
• sold: 0

returns filtecam:

• paid by: Seller
• method: Money back
• policy: Returns Accepted
• time: 30 Days

payments filtecam:

• wallet: Paypal
• credit card: Mastercard
• other

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