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The B+W XS-Pro Digital ND Vario Filter MRC Nano Filter is a variable neutral density filter providing an exposure reduction of between 1 to 5 stops. The degree of density is easily controlled by rotating the front filter ring creating a darkening of the entire image and allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey the effect of movement more easily. For easier, repeatable control over density settings, the front ring is labelled to identify different density values.
The Multi-Resistant Coating (MRC) is both an anti-reflection coating as well as a protective sur-face. It helps to increase light transmission by reducing reflections, scattered light, and ghosting. Additionally, it offers greater protection to the filter substrate and stays cleaner for longer than uncoated filters. The Nano coating associated with XS-Pro filters incorporates an additional 8th layer over the regular MRC and results in a better beading effect with water for greater cleaning efficiency.
B+W filters are constructed from high quality glass for increased optical clarity and colour fidelity. This filter features a thin, oversized mount which helps to reduce the likelihood to vignetting when used with wide-angle lenses.
|F-stops||Optical Density||Filter Factor||Transmission|
|Lens thread (mm)||52||58||62||67||72||77||82|
|Front thread (mm)||55||62||67||72||77||82||86|
With long exposure times, DSLR photographers should cover or close the optical viewfinder in order to avoid exposure measuring errors. At very high densities, slight chromatic aberrations in the image may occur. These can subsequently be eliminated by using white balance or by working in RAW format in the image-processing program.