Urth Variable ND Lens Filter Plus+ - 52mm

This indicates the filter can reduce light by a factor of ND2 (1 stop) up to ND32 (5 stops). This provides a range of light control suitable for various lighting conditions.

The 'X-effect' is a cross-polarization artifact that can appear when the two polarizing filters within the variable ND rotate against each other at their extremes. Avoid rotating the filter to its maximum or minimum limits. The locking rim helps prevent over-rotation.

The ultra-slim rim design helps minimize vignetting, making it suitable for many wide-angle lenses. However, very wide-angle lenses (e.g., wider than 24mm on full-frame) may still exhibit some corner darkening at certain focal lengths or orientations.

Yes, variable ND filters are highly popular for videography as they allow precise control over exposure to maintain desired shutter speeds for motion blur, even when lighting conditions change.

This single variable ND filter replaces multiple fixed ND filters, covering the range from 1 to 5 f-stops. For example, it replaces ND2, ND4, ND8, and ND16 filters.

Please refer to Urth's official website or the product packaging for specific warranty information, as it can vary by region and retailer.

Verify that your lens has a 52mm filter thread. Ensure there are no obstructions or damaged threads on the lens or the filter. Do not force the filter.

This occurs at extreme ends of the variable ND range. Rotate the filter rim slightly to find a position where the 'X' disappears. Avoid pushing the filter to its absolute maximum or minimum settings.

Ensure the filter is clean and properly screwed on straight. Re-check focus after attaching the filter. Extreme ND settings might require longer exposure times, which can introduce motion blur if the camera is not stable.

While this filter is designed for color neutrality, slight casts can occur at extreme settings. Adjust white balance in post-processing. For critical color work, consider using fixed ND filters.