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B+W 40.5mm ND 3.0 10-stop filter, slim black ring, clear glass

B + W Filter Company

B + W Filter Company 40.5mm 810M ND 3.0 10-Stop MRC Nano Neutral Density Filter camera filter

SKU CH-KWQG-NNH3M

A 40.5mm neutral density filter that blocks ten stops of light for long exposures and wide-aperture shooting in bright conditions

  • Ten-stop density enables minute-long exposures
  • 0 optical density cuts light by ten f-stops
  • MRC Nano coating prevents reflections and repels water
  • German-made optical glass preserves lens sharpness
  • 5 mm thread fits compatible lens barrels

Purpose and user

The B+W 40.5mm 810M ND 3.0 is a 10-stop neutral density filter that cuts light by ten full f-stops. It is built for photographers using analog or digital cameras with a 40.5mm thread who want extreme long-exposure effects such as silky water or empty streets in bright daylight.

Build integration

The filter screws directly onto the lens front thread and adds a multi-layer anti-reflective coating with seven layers per side plus a dirt- and water-repellent outer layer. A stable tripod is essential because exposures can reach one minute, and the slim mount avoids vignetting on wide-angle lenses.

Upgrade context

Compared with the earlier ND 106 this model delivers a stronger density for more pronounced motion blur and smoother water surfaces. It is not suited for shooters who need only moderate light reduction or who work handheld without a tripod.

Highlights

  • Ten-stop density enables minute-long exposures
  • 0 optical density cuts light by ten f-stops
  • MRC Nano coating prevents reflections and repels water
  • German-made optical glass preserves lens sharpness
  • 5 mm thread fits compatible lens barrels

Specifications

No published specifications for this item yet.

Questions about this item

How much light does the 810M ND 3.0 reduce for long-exposure work?

The filter cuts ten f-stops, extending exposures so that moving water turns to mist and people on streets blur or vanish entirely.

Will the MRC Nano coating handle heat and flare during minute-long daylight exposures?

The seven-layer anti-reflective coating on each side suppresses reflections and the outer nano layer repels water and dirt, keeping the glass clear during sustained use.

What thread size must my lens have to mount this 40.5mm filter?

Your lens needs a 40.5 mm front filter thread; the filter screws directly onto that thread with no step-up ring required.

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