K&F Neutral Density Half-Frame Filter 72mm ND8 (Half Neutral Density, Glass, SB6690)

The K&F Neutral Density Half-Frame Filter 72mm ND8 is a half neutral density glass filter designed for lenses with a 72mm filter thread. It reduces light by three stops across one half of the image area, allowing photographers to balance exposure between bright skies and darker foregrounds without affecting the entire frame. Constructed from optical glass, the filter mounts directly to compatible lenses and can be used with tripod setups and long-exposure techniques to control highlights and retain shadow detail.

Advantages

This half-frame ND8 glass filter provides a consistent three-stop reduction across the darkened portion of the frame while keeping color accuracy and sharpness. Its half-density design makes it practical for horizon-line scenes, helping to prevent blown-out skies and maintain foreground exposure. The threaded 72mm mount ensures a secure attachment to compatible lenses and compatibility with standard filter holders that accept threaded filters.

Suitable for

• Landscape photography with high-contrast skies
• Cityscapes and skyline shots at sunset or sunrise
• Long-exposure images where partial light reduction is needed
• Tripod-based composition to align the transition line accurately

Key specifications

• Filter type: Half neutral density (graduated half ND)
• Density: ND8 (≈3 stops light reduction on the dark half)
• Material: Optical glass
• Mount: 72mm external screw thread
• Effect: Reduces brightness on half of the frame to balance exposure

How to use

Screw the filter onto the front of a lens with a 72mm thread, then rotate and position the darker half so the transition aligns with the horizon or the area where light needs reduction. For precise placement, compose the scene on a tripod and adjust the filter’s vertical position by slightly twisting the glass if the frame requires micro-adjustment. Use exposure settings or long exposures as needed; the ND8 portion will provide approximately three stops of reduction in the darkened area while the clear half preserves foreground brightness.

Using recommendations

To achieve best results, mount the camera on a tripod for accurate composition, check the alignment of the transition line in live view, and use mirror lock-up or electronic shutter modes to minimize vibration in long-exposure shots. Avoid stacking multiple dense filters on the same lens thread to prevent vignetting or loss of image quality.