Neutral density camera filter B+W 802 Master 49 mm, Multi Resistant Coating

The B+W 802 Master neutral density camera filter, 49 mm, Multi Resistant Coating is a precision optical accessory designed to reduce light transmission for longer exposures or wider apertures while preserving image quality. Made from finely ground and polished special glass, the filter maintains the optical performance of high-quality lenses. Its thin-film coating technology provides uniform light attenuation across the visible spectrum and yields color-neutral results. A multilayer anti-reflective system and a dirt- and water-repellent outer layer improve contrast, reduce reflections and simplify cleaning.

Advantages

This neutral density filter delivers consistent light reduction suitable for both analogue and digital cameras, enabling controlled exposure without introducing color cast. The Multi Resistant Coating (MRC) incorporates seven anti-reflective layers per side to minimize stray reflections and an outer hydrophobic layer for easier maintenance. The high-quality glass substrate and precision polishing preserve sharpness and optical integrity when mounted on compatible 49 mm lenses.

Suitable for

• Landscape photography requiring long exposures to smooth water and cloud movement
• Portraits where wider apertures are needed for selective sharpness in bright light
• Long-exposure urban and street scenes to blur motion or remove moving subjects
• Creative light-trail and wipe-effect photography

Key specifications

• Filter type: Neutral density (ND)
• Light attenuation: high-strength ND (ND800 effect for substantial reduction)
• Thread size: 49 mm
• Glass: finely ground and polished special optical glass
• Coating: Multi Resistant Coating with seven anti-reflective layers per side and hydrophobic outer layer
• Color neutrality: uniform attenuation across visible spectrum for neutral color rendering
• Pack quantity: single-piece

How to use

Screw the 49 mm B+W 802 Master ND filter onto a lens with a matching filter thread until it is snug—avoid over-tightening. Use the filter to reduce incoming light when you need longer exposure times or to allow wider apertures in bright conditions. For long exposures, mount the camera on a stable tripod, set the desired aperture and shutter speed to achieve the recommended effect, and use remote release or self-timer to avoid camera shake. When stacking filters or using lens hoods, check for vignetting at wide focal lengths.

Usage recommendations

Handle the filter by its edges to keep the coated surfaces clean. Clean with a soft blower, lens brush or microfibre cloth and an appropriate lens cleaner; avoid rough materials. Store in a protective case when not in use and keep threads free of grit to ensure smooth mounting. For best results in long-exposure and portrait workflows, combine with a stable tripod and, when needed, exposure bracketing or live-view preview to confirm composition and exposure.