K&F Spiral Motion Blur Filter Halo Nano-B 67 mm (67mm) K&F Concept SB9063

The K&F Spiral Motion Blur Filter Halo Nano-B 67 mm creates a controlled swirling blur effect for highlights and point light sources. Designed to fit lenses with a 67 mm filter thread, this optical effect filter produces a spiral halo that softens bright areas and introduces a directional glow without digital post-processing. It is intended for creative photography applications such as portraits, night scenes, long exposures and artistic compositions where subtle motion-like halos or dreamy highlights are desired.

Advantages

The glass surface is precision-ground to generate a consistent spiral blur pattern around light points while preserving center sharpness. A multi-coated finish reduces flare and ghosting and helps maintain color balance. The slim metal mount is compatible with standard 67 mm filter threads and provides secure attachment with minimal vignetting on wide-angle lenses. The filter supports in-camera creative effects that are repeatable and immediate, eliminating the need for complex editing workflows.

Suitable for

• Portrait photography to soften specular highlights and add a creative halo
• Night and cityscape shots with streetlights and illuminated signs
• Long-exposure and motion-effect compositions
• Artistic and experimental photography involving point light sources

Key specifications

• Filter type: spiral motion blur optical effect
• Filter thread size: 67 mm
• Mount material: slim metal ring for standard filter threads
• Optical element: precision-ground glass with spiral blur pattern
• Coating: multi-layer anti-reflective treatment to reduce flare and preserve color
• Center resolution: designed to retain relative sharpness at image center while producing peripheral spiral blur

How to use

Screw the filter onto a lens with a 67 mm front thread until it is seated securely. Compose and focus the scene as usual; point light sources and specular highlights will develop the spiral halo effect. For stronger or more pronounced spirals, increase exposure time or include smaller, brighter light points in the frame. Evaluate results on the camera’s preview and adjust composition, aperture and exposure to control the intensity and visibility of the effect. The filter can be combined with neutral density or polarizing filters mounted in front of or behind it where physically compatible, but check for vignetting on wide-angle lenses.

Usage recommendations

Use wider apertures or longer exposures to accentuate the spiral effect on individual highlights. When working at night or in low light, stabilize the camera on a tripod and use mirror lockup or electronic shutter to reduce vibration. Clean the filter with an optical microfiber cloth and appropriate lens cleaner to maintain coating performance; avoid abrasive materials. Test the filter on different focal lengths to understand how the spiral pattern scales and to prevent unintended vignetting.