【Frame Self-Lock, No "X" Cross】Say goodbye to the dark "X" cross on images, K&F Concept utilizes cutting-edge technology (frame self-lock) to avoid the common "X" cross on a wide-angle and telephoto lens.
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I recently had the opportunity to try out the K&F Concept 77mm Magnetic Variable ND Lens Filter, and I must say, I was truly impressed with its performance. One of the standout features for me was the frame self-lock technology that eliminates the common ‘X’ cross on images, especially useful when using wide-angle or telephoto lenses.

The magnetic attachment system is simply remarkable. With a swipe and a click, I could attach or detach this filter in just one second – much faster than traditional thread filters. This quick installation time proved to be incredibly helpful during my outdoor photography sessions where I needed to adjust the filter frequently.

Another aspect that I appreciated was the high definition image quality that remained unaffected by color cast, thanks to the imported Japanese AGC optical glass used in its construction. The filter offers a 1-5 stops adjustable feature, allowing me to control the amount of light entering my lens and achieve the desired light reduction effect for different scenarios.

The waterproof and scratch-resistant coating on both sides of the glass was a welcome addition, providing protection against elements and glare. This ensures that my valued camera lens remains in good condition while still presenting high-quality photos. The anti-glaring properties were particularly useful when shooting under bright sunlight.

The package includes a 77mm ND2-ND32 filter and a basic ring, compatible with all 77mm lenses. However, it is essential to verify the lens size before ordering as the number is always preceded by an ” (diameter) symbol.

  • Magnetic 1 Second SwapThis magnetic variable ND2-ND32 filter with magnetic technology, install the magnetic filter adapter ring on the lens first, then the filter can be absorbed in 1 second, faster installation than traditional thread filter (6s).
  • Frame Self-Lock, No “X” CrossSay goodbye to the dark “X” cross on images, K&F Concept utilizes cutting-edge technology (frame self-lock) to avoid the common “X” cross on a wide-angle and telephoto lens.
  • High Definition Image, No Color CastMade by importing Japanese AGC optical glass, no effect on the color balance, ensures the high definition image quality. Support 1-5 stops adjustable to control the amount of light entering the lens to reach the light reduction effect in different stops.
  • Waterproof & Scratch Resistant CoatedBoth sides of the glass with nanometer coating (a total of 28 layers) are waterproof, scratch-resistant, and anti-glaring, effectively protecting the valued camera lens and presenting high-quality photos.
  • NotePackage including: 1* 77mm ND2-ND32 filter + 1* 77mm Basic ring. This filter kit is compatible with all 77mm lenses. Please verified the lens size before ordering. The number is always preceded by a “” (diameter) symbol.

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