【Self-Lock Frame, No 'X’ cross】Say goodbye to the "X" cross on images, K&F Concept utilizes cutting-edge technology to perfectly avoid the common "X" issue of variable nd filter on wide-angle and telephoto lenses.
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I recently had the pleasure of trying out the K&F Concept 77mm Variable ND Lens Filter, and I must say it has become an essential addition to my photography gear. The filter’s unique self-lock frame design eliminates the common issue of the ‘X’ cross on images, especially when using wide-angle or telephoto lenses.

One of the standout features of this variable nd filter is its use of imported AGC glass. This high-quality material ensures a balanced color spectrum with no color cast and maintains excellent image clarity and sharpness. It’s a true testament to the first-class materials used in crafting this product.

The 28 multi-layer nanometer coatings developed by K&F Concept optical engineers are another impressive aspect of this filter. These coatings provide waterproof, scratch-resistant, and anti-glaring protection for your valued lens, ensuring you capture high-quality photos.

The ultra-slim frame design of this filter is a game-changer. With a 7.4mm thickness, it effectively avoids vignetting even on wide-angle lenses, and the CNC non-slip design makes installation and removal effortless. This is particularly useful for those quick shots when every second counts.

A few things to keep in mind this filter kit is compatible with all 77mm lenses. Before placing your order, ensure that your camera’s lens thread size is indeed 77mm. Additionally, if you use a lens cap/hood, make sure it’s of the 82mm size.

Lastly, I would like to mention that my package arrived with both new and old packaging. While this might seem unusual, it doesn’t affect the quality or functionality of the product in any way.

  • Imported AGC GlassVariable nd filter made by importing AGC glass, first-class filter material balancing the color batter, with no color cast and no effect for the image clarity and sharpness.
  • Self-Lock Frame, No ‘X crossSay goodbye to the “X” cross on images, K&F Concept utilizes cutting-edge technology to perfectly avoid the common “X” issue of variable nd filter on wide-angle and telephoto lenses.
  • NANOTECK&F Concept optical engineers developed multi-layer nanometer coatings (total of 28), waterproof, scratch-resistant, and anti-glaring, protecting the valued lens and presenting high-quality photos.
  • Ultra Slim Frame Avoid Vignetting7.4mm Ultra-slim frame design utmost avoid the wide-angle vignetting (support 28mm focal length no vignetting). CNC-non-slip design helps install and remove the filter easily.
  • NOTEThis filter kit is compatible with all 77mm lenses. Please verify your camera’s lens thread size before ordering. The number is always preceded by a “” (diameter) symbol. For the 77mm nd filter, the lens cap/hood size should be 82mm.
  • New and old packages are sent randomly

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