Camera accessory designed to expand creative control, the K&F CONCEPT Variable ND Filter enables precise long exposures and motion blur for stills and video. Landscape photographers gain confidence from consistent colour balance and smooth, repeatable stop adjustments. Will the filter handle wide-angle glass and rugged outdoor use reliably?
⚡ At a Glance
- • Image Quality: Reduces light intake from 1 to 9 stops while preserving colour balance and cutting internal reflections
- • Best for: Landscape photographers and videographers who need flexible exposure control in changing light
- • Not ideal for: Some ultra-wide lenses that can produce a dark "X" cross unless the filter is rotated
Variable ND range covers ND2 to ND400, supporting long-exposure and motion-blur techniques. Constructed from HD AGC optical glass with 28 multi-layer coatings and an ultra-slim 7.4mm frame for reduced vignetting.
Flexible exposure control – thanks to ND2–ND400 variable f-stops
A continuously adjustable neutral density element allows reduction of light from 1 to 9 stops, with stop markings on the frame for repeatable settings. The putter-style frame supports 360-degree rotation so users can fine-tune exposure precisely.
Accurate control over shutter speed and aperture makes motion blur and long-exposure landscapes straightforward. Rapidly changing light can be compensated without swapping filters.
Cleaner images with reduced reflections – with HD AGC optical glass and multi-layer coatings
Manufactured from HD AGC optical glass and treated with 28 multi-layer coatings to cut internal reflections and glare. Coatings preserve neutral colour response across the ND range.
Colours remain true even at heavy ND settings, so post-processing time is reduced. Glare and ghosting are less likely on bright scenes, improving usable frames.
Built for outdoor use – with hydrophobic, oil-proof and scratch-resistant coatings
Both glass faces receive hydrophobic and oil-resistant coatings alongside scratch protection, making the surface easier to clean and more resistant to environmental wear. The ultra-slim 7.4mm frame minimises vignetting on wide-angle lenses.
Filters handle damp, dusty conditions more easily and survive demanding field use. Slim construction helps maintain corners without introducing heavy vignetting on many lenses.
✨ The 4 Key Reasons for K&F CONCEPT Variable ND Filter
- Variable ND Scale – Enables 1 to 9-stop exposure control for creative motion blur
- HD AGC Optical Glass – Cuts internal reflections, preserving colour and contrast in shots
- Putter-style Frame – Marks stops clearly, allowing repeatable adjustments for video work
- Hydrophobic & Scratch Coating – Repels water and oil, simplifies cleaning after outdoor shoots
📋 Technical Details at a Glance
- Filter Type: Variable Neutral Density (Fader)
- ND Range: ND2 to ND400 (1–9 f-stops)
- Filter Size: 67mm screw-in
- Glass: HD AGC optical glass
- Coatings: 28 multi-layer coatings
❓ Frequently Asked Questions
Q: What range of light reduction does the filter provide?
A: The filter covers ND2 to ND400, offering between 1 and 9 f-stops of light reduction for extended exposure control.
Q: Will the filter change colour balance or introduce a cast?
A: Manufactured from HD AGC optical glass with multi-layer coatings, the filter is designed to reduce reflections without affecting colour balance, and user feedback reports no noticeable colour cast.
Q: Will the filter cause vignetting on wide-angle lenses?
A: The ultra-slim 7.4mm frame supports use on wide-angle lenses and 16mm telephoto, but some lens and focal-length combinations can show a dark "X" cross; rotating the filter typically removes that artefact.
🏆 Our Verdict
Ideal for landscape photographers and videographers who need dependable long-exposure control in the field. The combination of a broad ND2–ND400 range, high-quality AGC glass and robust coatings helps preserve colour and resist environmental wear. While initial cost may be a consideration, durable construction and versatile performance make it a long-term asset for frequent shooters.
