【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 pleasure of using the K&F Concept 49mm Magnetic Variable ND Lens Filter, and I must say, it has been a game-changer for my photography!

Firstly, the frame self-lock technology is truly impressive. Gone are the days of dealing with the annoying ‘X’ cross on my images, especially when using wide-angle or telephoto lenses. This feature ensures that my photos remain crisp and clear.

Another standout feature is the magnetic 1 second swap technology. Compared to traditional thread filters, this magnetic variable ND2-ND32 filter installs in a flash! The installation time has been reduced significantly, making it much more convenient for on-the-go photography sessions.

The high definition image quality is also noteworthy. Made with imported Japanese AGC optical glass, there’s no color cast and the images remain balanced. The filter allows for 1-5 stops adjustable light control, making it versatile for various lighting conditions.

Moreover, the waterproof and scratch-resistant coating on both sides of the glass provides an extra layer of protection for my valued camera lens. It’s also anti-glaring, ensuring that I can capture high-quality photos without any unwanted reflections.

The package includes a ND2-ND32 filter and a magnetic basic ring. Compatible with all 49mm lenses, it’s essential to verify the lens size before ordering. The diameter symbol precedes the number in my case.

  • 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 a 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* ND2-ND32 filter + 1* Magnetic Basic ring. This filter kit is compatible with all 49mm lenses. Please verified the lens size before ordering. The number is always preceded by a “” (diameter) symbol.

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