These five K&F CONCEPT magnetic variable ND filters share identical optical specifications and mounting mechanisms, differing only by the lens diameter they accommodate. Each kit provides a 2-32 variable ND range with Japanese AGC optical glass and a magnetic adapter ring for rapid swapping. Selecting the correct unit is strictly a matter of matching your specific lens thread size.
| Product | Price | Key Attribute |
|---|---|---|
| K&F CONCEPT 62mm Magnetic Variable ND 2-32 Filter+Magnetic Ring | $66.99 | 62mm lens diameter |
| K&F CONCEPT 72mm Magnetic Variable ND 2-32 Filter+Magnetic Ring | $74.99 | 72mm lens diameter |
| K&F CONCEPT 58mm Magnetic Variable ND 2-32 Filter+Magnetic Ring | $59.99 | 58mm lens diameter |
| K&F CONCEPT 49mm Magnetic Variable ND 2-32 Filter+Magnetic Ring | $57.99 | 49mm lens diameter |
| K&F CONCEPT 52mm Magnetic Variable ND 2-32 Filter+Magnetic Ring | $57.99 | 52mm lens diameter |
Prices shown above are accurate as of 2026-09-23.
K&F CONCEPT 62mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
This 62mm version includes the standard magnetic basic ring and the variable ND filter for a 1-second swap. It utilizes Japanese AGC optical glass to maintain high definition without color cast. The frame self-lock technology helps prevent the common 'X' cross artifact on wide-angle shots. It features 28 layers of nanometer coating for waterproof and scratch resistance. This is the best-selling of these by Amazon sales rank.
Read our full review of K&F CONCEPT 62mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
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K&F CONCEPT 72mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
Designed for lenses with a 72mm thread, this kit pairs the 2-32 ND filter with a matching magnetic adapter ring. The glass is sourced from Japanese AGC to ensure no effect on color balance. It supports 1-5 stops of light reduction for varying lighting conditions. The 28-layer coating provides protection against water and scratches. The magnetic attachment is faster than traditional thread filters, taking approximately 1 second.
Read our full review of K&F CONCEPT 72mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
All pricing valid as of publish date — to see current pricing, click here.
K&F CONCEPT 58mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
Sized for 58mm lenses, this product offers the same 1-second magnetic installation process as the other models in the lineup. It uses Japanese AGC optical glass to deliver high-definition images with no color cast. The frame self-lock feature addresses the issue of dark crosses in images. Both sides of the filter are protected by a 28-layer nanometer coating. The package includes one ND2-ND32 filter and one magnetic basic ring.
Read our full review of K&F CONCEPT 58mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
All pricing valid as of publish date — to see current pricing, click here.
K&F CONCEPT 49mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
This 49mm variant includes the ND2-32 filter and a magnetic basic ring for compatible lenses. It relies on Japanese AGC optical glass to ensure high definition and color accuracy. The design incorporates frame self-lock technology to avoid the 'X' cross artifact. The 28-layer coating makes the glass waterproof and scratch-resistant. It allows for 1-5 stops of adjustable light reduction.
Read our full review of K&F CONCEPT 49mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
All pricing valid as of publish date — to see current pricing, click here.
K&F CONCEPT 52mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
Specific to 52mm lenses, this kit contains the variable ND filter and a dedicated 52mm filter adapter ring. It utilizes Japanese AGC optical glass to maintain image quality without color shifts. The magnetic technology allows for a quick 1-second swap compared to the 6-second install of thread filters. The 28-layer nanometer coating protects against water and scratches. It supports 1-5 stops of light reduction for different shooting scenarios.
Read our full review of K&F CONCEPT 52mm Magnetic Variable ND 2-32 Filter+Magnetic Ring
All pricing valid as of publish date — to see current pricing, click here.
Verdict
The best-overall pick is the K&F CONCEPT 62mm Magnetic Variable ND 2-32 Filter, which is the best-selling of these by Amazon sales rank. For a best-value choice based on the specific 49mm sizing, the K&F CONCEPT 49mm Magnetic Variable ND 2-32 Filter provides the same 28-layer coated AGC glass and 1-second magnetic swap functionality.
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