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B+W
52mm F-Pro ND Filter 1.8 (106)
Neutral Density Filter
This B+W Neutral Density Filter is designed to reduce your exposure by six f-stops. This allows running water to be rendered as flowing, and people moving in streets are dissolved in unsharpness or become invisible. The filter factor is 64x.
Each glass surface is vacuum coated with one layer of Anti-Reflection coating. This single layer helps to prevent internal ghosting and reflections. It also improves light transmission from approximately 92% (uncoated glass) to over 98%.
This filter uses the standard B+W F-Pro filter mount, which has a front accessory thread and is made of brass. It can be used with wide angle lenses, including most 24mm focal lengths on a full frame body, without vignetting. Another advantage of the F-Pro mount is its modified retaining ring, which is no longer threaded in from the front, but holds the filter glass in place from the back. When removing a filter or lens hood that has been screwed on too tight to the filter, the retaining ring is not at risk of loosening.