K&F Variable ND Filter 72mm (Fader ND8–ND2000) — Neutral Density Photography Filter

The K&F Variable ND Filter 72mm (Fader ND8–ND2000) is a neutral density filter designed to reduce the amount of light entering a camera lens through an adjustable density range. With a 72 mm thread size, this variable ND filter covers a wide attenuation span from approximately 3 stops (ND8) up to about 11 stops (ND2000), allowing photographers and videographers to control exposure, motion blur, and depth of field in bright environments. The filter mounts directly to compatible lenses with a 72 mm thread and serves as an alternative to stacking multiple fixed ND filters when flexible light reduction is needed.

Advantages

The variable design provides continuous control over light reduction without swapping filters, enabling quick adjustment on location. Constructed with multi-coated glass elements, the filter minimizes reflections and preserves color balance while reducing flare and ghosting. Its slim profile helps reduce vignetting on wide-angle lenses, and standard 72 mm threading ensures compatibility with many professional and consumer lenses. The broader density range supports both subtle exposure control and strong light attenuation for long-exposure photography and video.

Suitable for

• Landscape photography with long exposures to smooth water and cloud movement
• Portraits or stills requiring wider apertures in bright light to achieve shallow depth of field
• Videography where constant shutter speed or motion blur control is necessary
• Urban and architecture shooting when balancing highlights and controlling dynamic range

Key specifications

• Filter type: Variable neutral density (fader)
• Thread size: 72 mm
• Density range: ND8 to ND2000 (approx. 3 to 11 stops of light reduction)
• Optical construction: multi-coated glass elements to reduce reflections and maintain color fidelity
• Mount profile: low-profile/slim to limit vignetting on wide-angle lenses

How to use

Screw the filter onto the front thread of a lens with a matching 72 mm diameter until it is secure but not overtightened. Rotate the front ring of the variable ND filter to adjust the density and observe exposure changes in the viewfinder or on the camera monitor. For long-exposure photography, set the camera on a stable tripod, compose the shot, and dial in the desired shutter speed and aperture while adjusting the filter to achieve correct exposure. When recording video, set the shutter angle or shutter speed appropriate for the frame rate and use the filter to maintain consistent exposure without changing aperture or ISO.

Usage recommendations

Avoid extreme polarization angles and overlapping with other filters to reduce the risk of cross-polarization artifacts or X-patterns at high densities. Check for vignetting on wide-angle lenses and use a slim profile filter or step-up ring if necessary. Clean the filter surfaces with a soft microfiber cloth and appropriate lens cleaner to maintain optical performance.