Neutral Density Variable Filter K&F 46mm ND8–ND2000 (adjustable) for lenses

The K&F 46mm Variable Neutral Density Filter (adjustable ND8–ND2000) reduces light entering the lens to allow longer exposures and wider apertures without overexposure. This screw-mount filter fits lenses with a 46mm filter thread and provides continuous control of attenuation between approximately 3 and 11 stops, making it suitable for slow shutter techniques, motion blur effects, and aperture-driven depth-of-field control. The filter is designed for photographers and videographers who need on-the-fly exposure adjustment without changing lenses or relying solely on shutter and ISO settings.

Advantages

The variable ND design eliminates the need to carry multiple fixed-density filters by offering a broad, stepless range from light reduction suitable for slight dimming up to heavy attenuation for daytime long exposures. A precision screw-thread ensures secure mounting on compatible lenses, while optical coatings help maintain color neutrality and reduce reflections. The compact 46mm size keeps weight and bulk minimal, preserving lens balance and portability for field use.

Suitable for

• Long-exposure landscape photography to smooth water and cloud movement
• Video capture requiring consistent shutter angles or slower shutter speeds in bright conditions
• Portraits or creative shallow depth-of-field work in strong daylight
• Time-lapse sequences where exposure control is needed without changing settings frequently

Key specifications

• Filter type: Variable neutral density (continuous adjustment)
• Thread size: 46 mm screw mount
• Density range: adjustable from approximately ND8 to ND2000 (about 3 to 11 stops of light reduction)
• Optical material: multi-coated optical glass (anti-reflection, color-neutral coatings)
• Form factor: slim profile to minimize vignetting on wide-angle lenses

How to use

Attach the filter by screwing it onto a lens with a 46mm filter thread until it is secure but not over-tightened. Rotate the front element to adjust the density until the desired exposure is achieved; use a light meter or the camera’s exposure preview to set shutter speed and aperture. For very long exposures or very dark settings, combine the filter with a tripod and remote release to avoid camera shake. Check the image for color cast or cross-polarization effects at extreme settings and adjust white balance if necessary.

Usage recommendations

When using the filter at high density settings, monitor for potential vignetting and slight color shifts; stop down aperture or use lens corrections in-camera or in post-processing if needed. Clean the filter surface with a microfiber cloth and appropriate lens solution to preserve optical performance. For critical work, test the filter across the range to determine the most neutral settings for your camera and lens combination.