【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 opportunity to try out the K&F Concept 67mm Variable ND Lens Filter, and I must say, it has significantly upped my photography game!

First off, let’s talk about the self-lock frame. It’s a game-changer, really. Say goodbye to those pesky ‘X’ crosses that often appear in images when using variable ND filters on wide-angle and telephoto lenses. K&F Concept has managed to perfect this issue, thanks to cutting-edge technology.

The filter itself is made of imported AGC glass, a first-class material that balances color perfectly without any color cast or impact on image clarity and sharpness. This attention to detail really shows in the final product.

But what truly sets this filter apart is the NANOTEC coating. Developed by K&F Concept’s optical engineers, these multi-layer nanometer coatings total 28 and provide waterproof, scratch-resistant, and anti-glaring protection for your valued lens. The result? High-quality photos that are truly stunning.

The ultra-slim frame design of this filter also deserves a shout-out. At 7.4mm, it’s incredibly slim and manages to avoid vignetting even with wide-angle lenses (it supports 28mm focal length without any vignetting). The CNC-non-slip design makes installing and removing the filter a breeze.

One thing to note is that this filter kit is compatible with all 67mm lenses. Before ordering, make sure to verify your camera’s lens thread size. The number is always preceded by an ” (diameter) symbol. For the 67mm nd filter, the lens cap/hood size should be 72mm.

  • 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 67mm lenses. Please verify your camera’s lens thread size before ordering. The number is always preceded by a “” (diameter) symbol. For the 67mm nd filter, the lens cap/hood size should be 72mm.
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