Camera filter for controlling exposure and enabling long exposures, aimed at landscape and water photography. The K&F CONCEPT Variable ND Filter ND2-ND400 provides neutral density from ND2 to ND400, letting photographers capture silky water and reduce glare. Is the filter durable and low-vignette enough for wide-angle work?
⚡ At a Glance
- • Image Quality: Neutral density range ND2 to ND400, enabling up to 9 f-stop reduction for long exposures and glare control
- • Best for: Landscape and long-exposure photographers shooting rivers, waterfalls and bright scenes
- • Not ideal for: Users whose lenses do not use 40.5mm threads without adapters
Variable ND control adjusts light intake from 1 to 9 f-stops for long exposures. High-end Japanese optical glass with double-sided multilayer blue coating helps reduce reflections and resist moisture.
Smooth long exposures, with ND2–ND400 variable density
Variable neutral density range from ND2 to ND400 reduces light intake by 1 to 9 f-stops, achieved via the adjustable fader mechanism described in the product name. Double anti-reflective coating assists when using slow shutter speeds to record motion.
Long shutter speeds become practical in bright conditions, making flowing water and cloud movement easy to photograph. Glare and overexposure are controllable without stopping down excessively.
Wide-angle friendly, with an ultra-slim 7.3mm frame
Aviation aluminium alloy frame measures 7.3mm, designed to keep the rim as slim as possible to prevent vignetting on wide-angle lenses. Frame construction also aids secure, low-profile mounting.
Vignetting is less likely on wide-angle compositions, so full-frame landscapes remain evenly exposed. Low-profile mounting helps maintain balance and avoids intruding into the image corners.
Cleaner images in harsh light, with double-sided multilayer blue coating
Double anti-reflective multilayer blue coating on both glass surfaces reduces internal reflections and improves waterproof and dustproof performance. High-end Japanese optical glass provides consistent transmission and clarity.
Reduced flare and improved contrast deliver clearer results in backlit or bright scenes. Durable coatings also simplify field work by resisting moisture and dust during outdoor shoots.
✨ The 4 Key Reasons for K&F CONCEPT Variable ND Filter ND2-ND400
- Ultra-slim aluminium frame – Prevents vignetting on wide-angle lenses for cleaner corners
- High-end Japanese optical glass – Preserves sharpness and clarity across the frame
- Double-sided multilayer blue coating – Lowers reflections and improves resistance to water and dust
- Adjustable fader action – Smooth rotation enables precise exposure control during shoots
📋 Technical Details at a Glance
- Category: Camera filter
- Filter Type: Variable Neutral Density (Fader)
- Thread Size: 40.5mm
- Density Range: ND2 to ND400 (1 to 9 f-stops)
- Optical Glass: High-end Japanese optical glass
❓ Frequently Asked Questions
Q: What lens thread size is required for this filter?
A: The filter fits lenses with a 40.5mm thread size, so verify the lens barrel or underside of the lens cap for the ø marking before buying.
Q: How much light reduction does the filter provide?
A: Variable density ranges from ND2 to ND400, equivalent to roughly 1 to 9 f-stops of light reduction.
Q: Is the filter suitable for long exposure shots of waterfalls and rivers?
A: Yes, the ND2–ND400 range is especially suitable for rivers and waterfalls, and the double anti-reflective coating supports use with slow shutter speeds.
🏆 Our Verdict
Landscape and long-exposure photographers who need neutral density control will appreciate the filter's wide ND range and durable construction. High-end Japanese glass and double-sided coatings deliver clearer images with less flare, while the ultra-slim frame reduces vignetting. Strong build and optical choices make the filter a sensible long-term tool for outdoor shooters.
