K&F Concept 67mm Magnetic Variable ND Filter ND8-ND128 - Fast Magnetic

In this review the K&F Concept 67mm Magnetic Variable ND Filter ND8-ND128 is evaluated for photographers who need rapid exposure control without swapping lenses. The kit's standout feature is its magnetic one-second attachment, which lets users add or remove the filter almost instantly when paired with the supplied basic ring. It provides a practical 3-7 stop range for smoothing highlights in bright conditions while the multi-layer coatings aim to preserve color and clarity. This review focuses on real-world use, handling, optical quality, and any limitations observed.

Key Features

• Magnetic 1 Second Swap: The magnetic adapter ring and filter allow extremely quick attachment so a user can react to changing light without fumbling threaded filters.
• 3-7 Stops Light Reduction: The variable ND8-ND128 range gives flexible exposure control for slower shutter speeds or wider apertures in bright scenes.
• Japanese AGC Optical Glass: High-quality glass construction reduces color cast and helps retain sharpness across the frame.
• Frame Self-Lock: The design reduces the risk of the dark X cross on wide-angle and telephoto lenses, improving usable range compared with some competitors.
• 28-Layer Nano Coatings: Waterproof, scratch-resistant and anti-glare coatings protect the lens surface and improve durability in varied shooting conditions.
• Included Basic Ring: The kit includes a 67mm magnetic filter basic ring so the filter is ready to use on any 67mm lens without additional purchases.

Who It's For

Photographers who frequently shoot outdoors and need fast, repeatable neutral density control will get the most from this kit; landscape shooters using filters to smooth water or videographers needing to maintain shutter angle will appreciate the 3-7 stop range and rapid magnetic mounting. The included 67mm ring makes it convenient for a single lens owner or someone carrying a small set of 67mm glass.

Users who rely on very strong magnetic retention in harsh conditions or who use lens adapters with nonstandard shapes should consider other mounting systems. Also, shooters who require absolute maximum ND density beyond 7 stops or who need a threaded multi-filter stack may prefer traditional screw-in or matte box solutions.

Pros & Cons

Pros

• Quick magnetic attachment drastically reduces time spent changing filters in the field.
• Variable 3-7 stop range offers versatile exposure control for both photo and video work.
• Optical glass with multi-layer coatings minimizes color shift and resists scratches and water.
• Self-lock frame design helps avoid the dark X cross common with some variable NDs.

Cons

• Some users report the magnetism is weaker than expected, which can reduce confidence on vertical shots or in windy conditions.
• Only compatible with lenses that accept a 67mm adapter ring, so additional rings are needed for other sizes.

Specifications

Filter Type	Variable Neutral Density (ND8-ND128)
Light Reduction	Approximately 3 to 7 stops
Filter Thread Size	67mm (kit includes basic ring)
Glass	Japanese AGC optical glass
Coatings	28-layer nano multi-coating, waterproof and scratch resistant
Mounting	Magnetic adapter ring with quick-attach filter

Our Verdict

The K&F Concept 67mm Magnetic Variable ND Filter ND8-ND128 is a practical, value-oriented option for photographers who want fast, flexible exposure control and durable optics. It is especially good for landscape and run-and-gun video work thanks to the one-second magnetic swap and the neutral color rendering. Buyers should weigh the reported weaker magnet retention against the convenience; for many users the speed and coated glass make it worthwhile.

Frequently Asked Questions

Will this filter fit my lens?
The kit is compatible with 67mm lenses when the supplied magnetic basic ring is installed; verify the lens diameter marked with the diameter symbol before ordering.

Does the filter cause color cast?
Built with Japanese AGC optical glass and multi-layer coatings, it is designed to minimize color cast and retain high definition image quality.

Is the magnetic connection reliable?
The magnetic mounting enables very fast attachment, but some users report a weaker magnet; test on your lens and avoid relying on it for extreme angles or rough movement without confirmation.