Neutral Density Variable Filter K&F 67mm Kf X Fader ND8–ND128 (model SB6626)

The Neutral Density Variable Filter K&F 67mm Kf X Fader ND8–ND128 (model SB6626) is a screw-in optical filter that provides continuously adjustable light reduction between ND8 and ND128. Designed for lenses with a 67 mm filter thread, this variable ND lets photographers and videographers control exposure without changing aperture or shutter speed excessively. The filter enables long exposures, controlled motion blur, and the use of wider apertures in bright conditions while preserving color balance and contrast for landscape, portrait and creative imagery.

Advantages

This K&F variable ND filter offers smooth, stepless attenuation from 3 to 7 stops (ND8–ND128) in a single, easy-to-rotate unit, reducing the need to carry multiple fixed-density filters. The screw-in metal frame ensures secure mounting on 67 mm lenses and resists light leakage and rotation slippage. Optical glass elements deliver even darkening across the frame to minimize vignetting at common focal lengths, and a multi-coating helps reduce reflections and flare for clearer images during long exposures and video recording.

Suitable for

• Landscape photography requiring long exposures to smooth water and clouds
• Video work where controlled shutter speed is needed under bright light
• Creative photography using motion blur or shallower depth of field in daylight
• Slow shutter techniques such as light trails and moving subjects

Key specifications

• Filter type: Variable neutral density (continuous ND)
• Density range: ND8 to ND128 (approx. 3 to 7 stops attenuation)
• Mount thread size: 67 mm screw-in
• Construction: Multi-coated optical glass with metal frame
• Intended use: Photography and video exposure control, long exposures, motion blur

How to use

Attach the filter to a lens with a 67 mm thread by gently screwing it clockwise until snug; avoid overtightening. Rotate the outer ring to adjust the density between ND8 and ND128 while observing the viewfinder or live view to achieve the desired exposure and creative effect. When using very dark settings, increase ISO or use a tripod and longer shutter speeds to compensate. Check for cross-polarization or uneven darkening at extreme settings with wide-angle lenses and adjust composition or density accordingly.

Usage recommendations

Use a sturdy tripod for long exposures and monitor autofocus performance when the filter is attached; for critical wide-angle work, test different density settings to confirm minimal vignetting. Store the filter in a protective case when not in use and clean the glass with a microfiber cloth and appropriate lens cleaner to maintain image quality.