67mm Variable ND2-ND400 Variable ND Filter (1-9 Stops) - Adjustable

In this review the 67mm Variable ND2-ND400 from K&F CONCEPT is evaluated for photographers who need flexible exposure control without changing filters. The bottom line: it is best for landscape and outdoor shooters who want a slim, easy-to-rotate solution to reduce light up to 9 stops while retaining convenient handling. The review finds the filter delivers solid glare reduction and smooth adjustment for most shooting situations, though users should be aware of potential cross-pattern artifacts at maximum stops and occasional mixed color accuracy reports.

Key Features

• Import Optical Glass: Crafted from premium AGC optical glass with 8 multi-layer coatings to reduce reflections and preserve image detail in bright conditions.
• Versatile Light Control: Provides 1 to 9 stops of adjustable light reduction with 360-degree rotation for precise dimming across varied scenes.
• Glare-Free Surface: Oxidized sandblasting on the metal surface minimizes stray light and unwanted reflections during shoots.
• Slim and Secure Design: At 7.4mm thickness with a CNC-patterned edge, it is easy to attach, rotate, and remove while keeping low profile vignetting risk on many lenses.
• Compatibility Note: Built for lenses with a 67mm thread size and requires a 72mm lens cap when stored or capped.

Who It's For

The filter is ideal for landscape, long-exposure, and outdoor portrait photographers who need quick, continuous control over exposure without swapping glass. Its slim profile and smooth rotation make it convenient for on-location work and for users who carry limited gear.

Photographers seeking absolutely neutral color rendering or those using extreme focal lengths should be cautious: some users reported mixed results on color accuracy and occasional vignetting, and the natural cross-pattern effect can appear at maximum density on certain lenses.

Pros & Cons

Pros

• High-quality AGC optical glass and 8-layer coatings that reduce glare and reflections for clearer images.
• Wide 1 to 9 stop adjustable range with 360-degree rotation for fine exposure control in varied light.
• Slim 7.4mm profile and CNC patterning for secure grip and minimal bulk on the lens.
• Durable surface finish that minimizes stray light from the metal parts.

Cons

• At maximum stops some lenses may show a natural X black cross pattern and occasional color shift reported by some users.
• Requires confirming lens thread size and a 72mm cap for storage, which adds a small compatibility step.

Specifications

Filter thread size	67mm
Density range	Variable ND2 to ND400 (1 to 9 stops)
Glass type	AGC optical glass
Coatings	8 multi-layer coatings
Thickness	7.4mm
Rotation	360 degree adjustable
Included accessory	Microfiber cleaning cloth

Our Verdict

The 67mm Variable ND2-ND400 is a practical, good-value tool for outdoor and landscape photographers who want a compact way to control exposure across different scenes. Its quality glass, multi-layer coatings, and slim CNC design deliver reliable performance, while awareness of cross-pattern risk at extreme stops helps set realistic expectations.

Frequently Asked Questions

Will this fit my lens?
Check the lens thread size printed near the lens barrel; this filter fits lenses with a 67mm thread and requires a 72mm cap for storage.

Can I expect color shifts?
Most users report good color, but some observed mixed color accuracy in certain conditions, so test on your setup before critical shoots.

What causes the X black cross pattern?
The cross-pattern is a natural interaction between the adjustable ND element and some lenses at maximum stops and is temporary depending on focal length.