【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 purchased the K&F Concept 37mm Variable ND Lens Filter, and I must say, it has been a game-changer for my photography! One of the standout features is the absence of the annoying ‘X’ cross that often appears on images when using variable ND filters. The self-lock frame design, coupled with cutting-edge technology, ensures this issue is nonexistent.

The quality of the filter itself is exceptional. Imported AGC glass has been used to create a first-class filter material that maintains excellent color balance and clarity without any color cast. This results in sharp, vibrant images every time.

In addition to its superior quality, the K&F Concept features 28 layers of nanometer coatings developed by their optical engineers. These coatings are waterproof, scratch-resistant, and anti-glaring, providing protection for your valued lens while presenting high-quality photos.

The ultra-slim frame design is another feature that I find incredibly useful. It avoids vignetting even with wide-angle lenses (supporting a focal length of 28mm with no vignetting). The CNC-non-slip design makes installation and removal of the filter easy, adding to its convenience.

However, it’s essential to note that this filter kit is compatible with all 37mm lenses. Before ordering, please verify your camera’s lens thread size. The number is always preceded by a ” (diameter) symbol. For the 37mm nd filter, the lens cap/hood size should be 40.5mm.

One final point new and old packages are sent randomly, so don’t be alarmed if you receive an older model. Regardless of the packaging, the quality and functionality remain top-notch.

  • 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 37mm lenses. Please verify your camera’s lens thread size before ordering. The number is always preceded by a “” (diameter) symbol. For the 37mm nd filter, the lens cap/hood size should be 40.5mm.
  • New and old packages are sent randomly

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