Urth Variable ND Lens Filter - 67mm

It refers to the range of light reduction. ND2 blocks 1 f-stop of light, while ND32 blocks 5 f-stops. The variable nature allows you to adjust anywhere within this range.

The 'X-effect' is a common issue with variable ND filters at their highest and lowest settings. Avoid using the filter at its absolute maximum or minimum rotation. The locking mechanism helps set precise intermediate values, reducing the risk.

Yes, you can stack filters, but be aware that doing so increases the risk of vignetting, especially on wider lenses. The ultra-slim design helps, but stacking should be done cautiously.

Yes, it's excellent for videography as it allows you to maintain consistent shutter speeds for natural motion blur while adjusting aperture for depth of field control in varying light conditions.

Use a soft microfiber lens cloth. For stubborn smudges, apply a small amount of lens cleaning solution to the cloth, not directly to the filter, and wipe gently. A blower brush can remove loose dust.

Urth offers a lifetime quality guarantee on their filters, meaning they are backed for life against manufacturing defects.

The filter is made with high-quality German SCHOTT glass and 20 layers of nano-coating, designed to maintain exceptional sharpness and true light transmission with minimal impact on image quality.

This 'X-effect' occurs at the extreme ends of the variable ND range. Rotate the filter's outer ring to a position between the minimum and maximum settings, away from the extremes, to resolve it.

Ensure you are using the correct filter size (67mm) for your lens and that the lens threads are clean. Align the filter carefully and try screwing it on gently. Never force the filter.

While this filter is designed for color neutrality, some slight casts can occur at very dense ND levels. Ensure the filter is clean. If the cast persists, consider minor color correction in post-processing or try adjusting to a slightly different ND setting.

The ultra-slim rim design minimizes this, but strong vignetting can still occur on very wide-angle lenses, especially when stacked with other filters. Ensure you are not at the extreme ends of the ND range and consider using a lens hood.