Neutral Density Variable Filter K&F 43mm Adjustable ND8–ND128 (KF01.1445)

The Neutral Density Variable Filter K&F 43mm Adjustable ND8–ND128 (KF01.1445) is a variable gray (fader) filter designed for lenses with 43 mm front threads. It provides adjustable light attenuation from ND8 to ND128, offering up to approximately 7 stops of reduction to support long exposures, control motion blur, and permit wider apertures in bright conditions. The filter uses a rotating mechanism to vary density continuously, allowing fine control of exposure without changing aperture or shutter speed when working in changing light.

Advantages

This K&F variable ND filter covers a wide attenuation range in a single optic, removing the need to carry multiple fixed-density filters. The slim 43 mm mount preserves wide-angle vignetting characteristics on compact lenses, and the threaded metal frame ensures stable attachment and smooth rotation. The gray (fader) design maintains neutral color balance across the attenuation range, helping to avoid color casts in landscape and architectural photography. Its continuous adjustment makes it practical for both stills and video work where gradual or subtle changes in exposure are required.

Suitable for

• Long-exposure landscape photography to smooth water and clouds
• Architectural shots requiring controlled highlights in bright daylight
• Videography where exposure needs to be adjusted without altering aperture or shutter speed
• Street and travel photography when brighter conditions call for wider apertures

Key specifications

• Filter thread size: 43 mm
• Type: Variable neutral density (gray/fader)
• Attenuation range: ND8 to ND128 (approx. 3 to 7 stops)
• Construction: Rotating adjustable element in metal threaded frame
• Intended effect: Continuous light reduction for long exposures and motion control

How to use

Attach the filter to the lens by screwing the threaded frame onto the 43 mm front threads until secure. Set the camera exposure settings (aperture, shutter speed, ISO) for the desired image characteristics, then rotate the filter’s outer ring to increase or decrease the density until the exposure meter or histogram indicates the correct exposure. For long-exposure work, use a tripod and disable image stabilization if present. When shooting video, make small, gradual rotations to avoid abrupt exposure shifts.

Usage recommendations

Avoid stacking multiple filters on top of the variable ND to reduce the risk of vignetting or cross-polarization effects. When using the filter at its maximum density, check for any color shift and make minor white balance adjustments in-camera or during post-processing if necessary. Store the filter in a protective case to prevent scratches and clean the glass with appropriate lens-cleaning materials.