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39mm B+W Master 803M ND 0.9 3-stop filter, slim black ring, clear neutral glass

B + W Filter Company

B + W 39mm Master 803M ND 0.9 3-Stop MRC Nano camera filter

SKU CH-VTJB-H5VA2

A 39 mm neutral-density filter that cuts light by three stops for wider apertures or longer exposures, featuring multi-resistant nano coating made in Germany

  • Reduces light by three f-stops using ND 0.9 density
  • Enables wider apertures for shallow depth of field in bright conditions
  • Creates smooth water and motion-blur effects during long exposures
  • Multi-layer anti-reflective coating with 7 layers per side minimises reflections
  • Made in Germany with precision-ground Schott glass for optical clarity

39mm Master 803M ND Filter

The B+W 39mm Master 803M ND 0.9 filter reduces incoming light by three stops for analog and digital cameras. It enables wider apertures for selective sharpness in portraiture and supports long exposures for motion blur effects on water or empty streets.

Optical Glass and MRC Nano Coating

Finely ground special glass maintains optical quality without degrading lens performance. The multi-resistant coating uses seven anti-reflective layers per side to minimise reflections, topped with a dirt- and water-repellent nano layer for easy cleaning and protection.

Bright-Light Video and Creative Motion Control

This filter replaces the need to stop down aperture in bright conditions, preserving shallow depth of field for video work. The upgrade is worth it when uniform light attenuation across the visible spectrum is required for consistent wipe effects or continuous light trails.

Highlights

  • Reduces light by three f-stops using ND 0.9 density
  • Enables wider apertures for shallow depth of field in bright conditions
  • Creates smooth water and motion-blur effects during long exposures
  • Multi-layer anti-reflective coating with 7 layers per side minimises reflections
  • Made in Germany with precision-ground Schott glass for optical clarity

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 39mm Master 803M ND 0.9 filter and what step do people often miss?

Screw the 39mm thread onto the lens front until snug; the step often missed is removing any existing filter first to avoid vignetting from stacking.

What maintenance will the MRC Nano coating need later?

The outer nano layer repels dirt and water; clean only with a microfibre cloth and lens fluid — no abrasive wipes — to preserve the 7-layer anti-reflective coating on each side.

What limit appears first during sustained use of the ND 0.9 filter?

The 3-stop light reduction is fixed; in very bright scenes you may hit the camera’s minimum aperture or maximum shutter speed before achieving the desired exposure.

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