Neutral density camera filter B+W 806 MASTER, 4.3 cm, MRC coating

The B+W 806 MASTER neutral density camera filter with a diameter of 4.3 cm reduces incoming light by six f-stops to enable longer exposures, motion blur effects and aperture-controlled depth of field without changing lens settings. Made from finely ground and polished special optical glass, the filter preserves the optical quality of high-end lenses while delivering uniform, color-neutral attenuation across the visible spectrum. The filter is supplied as a single-piece pack and requires stable support such as a tripod for long-exposure photography.

Advantages

The filter’s thin-film technology combines a pure neutral density effect with a multi-layer anti-reflective system to minimize reflections and preserve image contrast. Each filter side receives seven anti-reflective layers, and an outer protective layer provides dirt- and water-repellent properties for easier cleaning and maintenance. The finely polished glass base reduces the risk of degrading lens performance and ensures consistent, color-neutral results even at strong attenuation levels.

Suitable for

• Long-exposure landscape photography to smooth water and cloud movement
• Intentional motion blur and creative effects in daytime conditions
• Maintaining wide apertures in bright light for shallow depth of field
• Architectural and street photography when controlled exposure is required

Key specifications

• Optical glass: finely ground and polished special glass for high image quality
• Light reduction: approximately 6 f-stops attenuation
• Diameter: 4.3 cm
• Coating: multi-layer anti-reflective coating on both sides (seven layers per side)
• Surface finish: outer dirt- and water-repellent protective layer for easy cleaning
• Color neutrality: uniform attenuation across visible wavelengths for neutral color rendering

How to use

Mount the filter securely to the lens using the matching thread or holder and ensure the connection is tightened without over-torquing. Because the 6-stop attenuation significantly increases exposure time, use a tripod or other stable support to avoid camera shake. Meter for the final exposure with the filter in place or apply the known 6-stop exposure compensation when setting shutter speed and ISO. Check framing and focus before attaching the filter when possible; if autofocus is used, verify focus after mounting. Clean the outer coating gently with a soft, lint-free cloth if needed.

Usage recommendations

Use this filter primarily for scenes requiring long shutter speeds in daylight or bright conditions. Combine with a sturdy tripod and remote release or camera timer to minimize vibration. When precise color fidelity is critical, verify white balance and test shots, as heavy attenuation can affect metering and exposure workflow. Store the filter in a protective case when not in use to preserve the coating and glass quality.