B+W XS-Pro Digital Variable ND Filter - 49mm

The B+W XS-Pro Digital Variable ND filter offers an adjustable range from +1 to +5 f/stops of neutral density.

The Nano coating repels moisture and dirt, making it easy to clean. Use a soft lens brush for dust. For smudges, use a microfiber cloth lightly dampened with lens cleaning solution.

While possible, it is generally not recommended due to potential optical quality degradation and increased risk of vignetting. If stacking, the Variable ND should be the outermost filter.

Variable ND filters, including this one, can exhibit an 'X' pattern or color cast at their extreme density settings. This is a physical limitation of the polarizing elements. Test your filter to find the optimal range for your needs.

MRC stands for Multi-Resistant Coating, which reduces reflections and improves durability. 'Nano' refers to an additional outer layer that enhances the hydrophobic (water-repelling) and oleophobic (oil-repelling) properties, making the filter easier to clean.

Yes, the XS-Pro mount is an Extra Wide (EW) design intended to minimize vignetting. It is generally compatible with lenses as wide as 17mm on full-frame or 12mm on APS-C. However, always test with your specific lens as barrel designs can vary.

This specific model has a 49mm filter thread size.

This is a common characteristic of most variable ND filters, especially at higher densities. It occurs when the two polarizing elements that create the ND effect are rotated too far. Try adjusting the rotation slightly to minimize the effect or use a combination of fixed ND filters for extreme densities.

While the XS-Pro mount is designed to minimize vignetting, it can still occur with very wide lenses or specific lens barrel designs. Test your specific lens at its widest setting and ensure the filter is screwed on straight. If vignetting persists, consider using a wider ND filter if available, or avoid extreme wide-angle use with this filter.

Ensure no debris is caught between the rotating elements. Gently try to free the ring. If the issue persists, the filter may require professional servicing.

Use a soft lens brush for dust. For smudges, use a dedicated lens cleaning fluid applied to a microfiber cloth. Gently wipe the filter surface. The nano coating should make this process easier.