K&F Halo Spiral Motion Blur Effect Filter 72mm (Nano-B) for Camera Lenses

The K&F Halo Spiral Motion Blur Effect Filter 72mm (Nano-B) is a screw-on optical accessory designed to create a controlled spiral or whirl motion blur around bright points in your frame. Engineered for lenses with a 72 mm thread, this filter alters specular highlights into swirling streaks while allowing you to retain manual control over exposure and focus. It is intended for creative photography applications where a dynamic, moving-light effect is required without relying on in-camera post-processing.

Advantages

This filter produces a consistent spiral blur effect that transforms point light sources into curved streaks, useful for adding movement and atmosphere to images. The Nano-B coating improves surface durability and reduces reflections, helping to preserve contrast in scenes with strong highlights. The screw-on metal frame provides a secure fit on lenses with the correct thread size and maintains optical alignment for reliable results across multiple exposures and setups.

Suitable for

• Creative portrait sessions with dramatic light shaping
• Night and urban photography featuring street lights and signage
• Long-exposure and intentional camera movement techniques
• Event and concert photography to stylize bright stage lights
• Experimental and fine-art photography projects

Key specifications

• Filter diameter: 72 mm screw-on mount compatible with 72 mm lens threads
• Effect type: spiral / whirl motion blur applied to bright points
• Coating: Nano-B multi-coating for improved durability and reduced reflections
• Mount material: metal screw ring for stable attachment
• Optical behavior: preserves focus plane and exposure control while altering highlights

How to use

Screw the filter onto a lens with a 72 mm front thread, making sure the ring is seated evenly to avoid vignetting. Compose and focus the scene normally; the spiral effect will be applied to bright highlights without changing the plane of focus. For pronounced spiraling, use point light sources or specular highlights such as street lamps, car headlights, or reflective surfaces. Adjust shutter speed and aperture as needed to achieve the desired exposure while maintaining the blur effect; longer exposures can emphasize motion when combined with camera movement or subject motion.

Usage recommendations

Use the filter on prime or zoom lenses with a 72 mm thread and test at different apertures and exposure times to find the optimal balance between sharp subject detail and the desired spiral streaks. Clean the glass with lens-safe tools and store the filter in a protective case when not in use to preserve the Nano-B coating and mechanical fit.