Thanks to its adjustable density control, the B+W ND Vario filter can be tailored to your individual needs. The XS-Pro mounting ring features an index setting that allows photographers to adjust the density between +1 and +5 stops. You can combine additional B+W ND filters with fixed values to achieve higher density options. The ND Vario should be the outermost filter when combined with additional filters. The B+W XS-Pro ND Vario filters are all MRC-Nano coated and available in sizes 52 mm, 58 mm, 62 mm, 67 mm, 72 mm, 77 mm, and 82 mm. The XS-Pro Vario ND mounting ring has an extra wide design and should avoid vignetting issues on most 17 mm lenses when used on a full-frame camera. Since device specifications can vary greatly, we recommend conducting your own tests to confirm the results with your specific equipment.