Urth Variable ND Lens Filter Plus+ - 77mm ND2-32

This indicates the filter's range. 'ND2' is the lowest density, reducing light by 1 stop (equivalent to 2x light reduction). 'ND32' is the highest density, reducing light by 5 stops (equivalent to 32x light reduction). The filter allows you to adjust anywhere within this 1 to 5 stop range.

The Urth Variable ND filters feature a locking rim that helps prevent over-rotation. Always ensure the locking mechanism is properly engaged at your desired setting. If the 'X-effect' still appears, try adjusting the filter to a setting slightly away from the maximum or minimum.

No, this 77mm filter is designed specifically for lenses with 77mm filter threads. You will need to purchase a filter with the correct thread size for your lens. Urth offers this filter in multiple sizes.

Yes, variable ND filters are very useful for video. They allow filmmakers to maintain a consistent shutter speed (often double the frame rate) for natural motion blur, even as lighting conditions change throughout a shot or scene.

The locking rim has a mechanism that allows you to set the desired level of ND reduction and then lock it in place. This prevents accidental rotation during shooting and helps to mitigate the 'X-effect' by limiting the range of rotation.

Urth provides a lifetime quality guarantee for this filter, indicating their confidence in its durability and lasting performance.

While it is possible to stack filters, doing so with a variable ND filter can increase the risk of vignetting and the 'X-effect'. It is generally recommended to use only the variable ND filter or a single additional filter like a polarizer, being mindful of potential stacking issues.

This is the 'X-effect' common with variable ND filters. It typically occurs at the extreme ends of the filter's range. Try rotating the rim to a setting between the minimum and maximum to resolve this. The locking rim helps prevent this, but ensure it is properly engaged.

Ensure you are using the correct filter size (77mm for this filter) and that the lens threads are clean. Do not force the filter; try re-aligning and screwing it on gently.

Variable ND filters can sometimes introduce a slight color cast. This is more common at higher stop reductions. Adjust white balance in post-processing or use the camera's custom white balance function. High-quality glass like SCHOTT reduces this effect.

Ensure you are using the filter on a 77mm lens. While the ultra-slim rim is designed to prevent vignetting, it can still occur on extremely wide-angle lenses when extended to their widest focal lengths. Try zooming in slightly or checking compatibility for very wide lenses.