Urth Variable ND Filter - 86mm

The filter provides a light reduction range from 1 f-stop (ND2) up to 8.66 f-stops (ND400).

The locking rim has a mechanism that prevents over-rotation between the minimum and maximum ND settings. This physical stopper helps ensure you stay within the filter's operational range, thus avoiding the cross-polarization or 'X-effect' that can occur with over-rotation.

The filter uses superior Japanese AGC glass, which is known for its high quality and clarity, enhanced by an 8-layer nano-coating.

The filter features an ultra-slim rim design to minimize vignetting. However, it's always recommended to test the filter on your specific ultra-wide-angle lens, especially at the highest ND settings, as some vignetting may still occur.

A variable ND filter offers a range of ND stops in a single unit, providing greater flexibility to adjust exposure without changing filters. This is particularly useful for rapidly changing light conditions or when precise exposure control is needed.

Use a soft lens brush or compressed air for dust. For fingerprints or smudges, use a clean microfiber lens cloth, potentially with a drop of lens cleaning solution. Wipe gently from the center outwards.

Urth offers a lifetime quality guarantee on their filters, ensuring lasting resilience and performance.

This occurs when the filter is rotated too far. Ensure you do not rotate the filter beyond its marked minimum (ND2) or maximum (ND400) settings, or past the locking rim's stopper.

While Urth uses high-quality glass, some variable ND filters may exhibit minor color casts. Try adjusting white balance in post-processing. If the cast is significant, ensure the filter is clean and not damaged. Consider a fixed ND filter for absolute color neutrality.

Ensure you are using the correct filter thread size for your lens and that both the lens threads and filter threads are clean. Try to screw it on straight, without cross-threading.

This can happen with variable ND filters, especially at higher ND stops or on very wide lenses. Try using a slightly higher thread size filter if available or stop down your aperture slightly (if shooting stills) or accept it as a limitation of using a variable ND on such lenses.